2015年9月26日星期六

Chinese Steel industry pre-1949

The steel industry was small and sparsely populated at the start of the twentieth century and during both world wars. Most of the steel infrastructure was destroyed during the wars, and were using Soviet technologies. China lagged the western countries in its steel industry development even though they were using central planning techniques during the early days of communist rule.
China underwent rapid economic industrialisation since Deng Xiaoping's capitalist reforms which took place 3 decades ago in 1978.

The steel industry gradually increased it output. China's annual crude steel output was 100 million tons in 1996.

It produced 123 million tons of steel in 1999. After its ascension to the WTO it aggressively expanded its production for its growing appetite of manufacturing industries such as automotive vehicles, consumer electronics and building materials.

The Chinese steel industry is dominated by a number of large state-owned groups which are owned via shareholdings by local authorities, provincial governments and even the central authorities. The biggest steel groups are Baosteel, Angang Steel Company, Wuhan Iron and Steel, Anshan, Tangshan, Shagang Group and Hebei Iron and Steel.

In 2008 raw materials such as Iron ore prices grew and China had to reluctantly agree to price increases by the three largest iron ore producers in the world; BHP Billiton, Rio Tinto and Vale.

During the Global financial crisis the Chinese steel mills won price reprieves as demand from their customers slowed. When the demand started to pick up again in 2009 and in 2010, the price crept back up due to higher demand for automobiles, low interest rates, government fiscal stimuli around the world.[6] Prices for iron ore were negotiated on an annual contract pricing scheme.

Australian iron ore producers were not happy that iron prices did not reflect Spot market pricing. In 2010 pressure from BHP Billiton and Rio Tinto to move to a quarterly based index pricing succeeded.Many Japanese steel mills and Chinese steel companies had to follow as demand for raw materials heated up.

Spot-basis pricing has caused problems for steel manufacturers such as exposing them to price fluctuation in the market and reducing the stability of resource supply. Steel mills prefer long term pricing to hedge against cost and maintain raw material supply stability.

Rio Tinto has said it will cancel contracts and sell the steel on the spot markets if Chinese steel mills back down on the new quarterly pricing regime.

In 2011 China was the largest producer of steel in the world producing 45% of the world's steel, 683 million tons, an increase of 9% from 2010. 6 of 10 of largest steel producers in the world are in China. Profits are low despite continued high demand due to high debt and overproduction of high end products produced with the equipment financed by the high debt. The central government is aware of this problem but there is no easy way to resolve it as local governments strongly support local steel production. Meanwhile, each firm aggressively increases production.[15] Iron ore production kept pace with steel production in the early 1990s but was soon outpaced by imported iron ore and other metals in the early 2000s. Steel production, an estimated 140 million tons in 2000 increased to 419 million tons in 2006. Much of the country's steel output comes from a large number of small-scale producing centers, one of the largest being Anshan in Liaoning.

China was the top exporter of steel in the world in 2008. Export volumes in 2008 were 59.23 million tons, a 5.5% fall over the previous year.[16] The decline ended China's decade-old steel export growth. As of 2012 steel exports faced widespread anti-dumping taxes and had not returned to pre-2008 levels. Domestic demand remained strong, particularly in the developing west where steel production in Xinjiang was expanding.

On 26 April 2012 a warning was issued by China's bank regulator to use caution with respect to lending money to steel companies who, as profits from the manufacture and sale of steel have fallen, have sometimes used borrowed money for speculative purposes. According to the China Iron and Steel Association the Chinese steel industry lost 1 billion Rmb in the first quarter of 2012, its first loss since 2000.

Guangdong Shunde Seko Machinery & Technology Co.,Ltd.www.gdseko.com
Lucy Xie

sevvice@gdseko.com
Skype:Lucy Xie,SEKO Machinery

Suggested Reading:Knowledge of the steel

2015年9月25日星期五

The SEKO Machinery Company's employees go to Thailand to travel(1)

 
 

Pipe industry of Russia-----------From SEKO Machinery

The Pipe industry of Russia is part of that country's ferrous metallurgy sector. In recent years, approximately $8 billion has been invested in the modernization of Russian pipe manufacture, making it possible to produce new products and improve quality. By 2010, about 40% of the pipes produced in Russia were manufactured on new equipment.
Manufacturing companies.

1VEST- MD.

VEST-MD, located in Volgograd, manufactures welded tubes, special-purpose pipes for use in commercial and residential appliances and parts for the automotive industry. VEST-MD is a major Russian manufacturer of automotive tubes; its customers include ZiL, Kamaz, AvtoVAZ, MAZ, KrAZ, AutoZAZ, and SeAZ. The company's products are sold within Russia and also exported to Ukraine, Moldova, Uzbekistan, and Iran.

2Vyksa Steel Works.

Located in Vyksa near Nizhny Novgorod, the Vyksa Steel Works are a division of the United Metallurgical Company. In 2005, the company began making a new line of single-seam 1420mm pipes for main gas pipelines. The Russian bank Sberbank lent the company US$170 million to support this effort. As of 2006, Vyksa was the largest Russian manufacturer of metal pipes. In 2007, the company became the only Russian pipe supplier to Nord Stream, providing piping for the construction of an underwater section of Nord Stream's pipeline under the Baltic Sea. In 2008, the company began to use epoxy anti-corrosion coatings on pipes for use in offshore oil wells and gas fields.

3Izhora Pipe Plant.

Located in Kolpino, St. Petersburg, Izhora is fully owned by the joint stock company Severstal. Since 2006, the company has produced large diameter pipes up to 18 meters in length for the oil and gas industries. As of 2008, annual production was 438 tonnes. The company received a significant part of an order to supply large diameter pipes to the Bovanenkovo-Ukhta gas trunkline system.
sevvice@gdseko.com
Skype:Lucy Xie,SEKO Machinery
Suggested Reading:Maintenance of stainless steel.

Maintenance of stainless steel.

If treated or stored incorrectly, any grade of stainless steel may discolor or stain. To maintain optimum appearance, the surface should be cared for regularly.
Maintenance during installation.
The quality of installation affects the durability and lifespan of stainless steel. Therefore it is important to make sure stainless steel is in good condition before installation. Normally, giving it a quick clean is enough prior to installation. However, if surface contamination is present, more attention is required. In fields such as aerospace, pharmaceuticals and food handling, an extremely high standard of cleanliness may be required so extra care should be taken.
Routine maintenance.
Maintenance is required to maintain the quality and appearance of steel. Depending on the environment, it is carried out between one and ten times per year. A proper maintenance routine significantly prolongs the life of stainless steel.
Tools used for maintenance.
1Soft cloth and water: suitable for cosmetic issues and general cleaning.
2Mild detergent: needed if stains cannot be easily lifted with water.
3Glass cleaner: useful for removing fingerprints and similar stains.
Guangdong Shunde Seko Machinery & Technology Co.,Ltd.www.gdseko.com
Lucy Xie

sevvice@gdseko.com
Skype:Lucy Xie,SEKO Machinery

Suggested Reading:What is the steelmaking


2015年9月22日星期二

Raw steel production in US up 0.7 percent from previous week

According to the American Iron and Steel Institute (AISI), in the week ending September 19, 2015, US domestic raw steel production was 1,706,000 net tons while the capability utilization rate was 71.4 percent. Production was 1,878,000 net tons in the week ending September 19, 2014 while the capability utilization then was 78.1 percent. The current week production represents a 9.2 percent decrease from the same period in the previous year. Production for the week ending September 19, 2015 is up 0.7 percent from the previous week ending September 12, 2015 when production was 1,694,000 net tons and the rate of capability utilization was 70.9 percent.
Adjusted year-to-date production through September 19, 2015 was 64,357,000 net tons, at a capability utilization rate of 72.5 percent. That is down 8.0 percent from the 69,987,000 net tons during the same period last year, when the capability utilization rate was 78.0 percent.
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Skype:Lucy Xie,SEKO Machinery
Suggested Reading:What is the Polishing (metalworking)?

What is the steelmaking?

When iron is smelted from its ore, it contains more carbon than is desirable. To become steel, it must be reprocessed to reduce the carbon to the correct amount, at which point other elements can be added. In the past, steel facilities would cast the raw cast iron product into ingots which would be stored until use in further refinement processes that resulted in the final product. In modern facilities, the initial product is close to the final composition and is continuously cast into long slabs, cut and shaped into bars and extrusions and heat treated to produce a final product. Today only a small fraction is cast into ingots. Approximately 96% of steel is continuously cast, while only 4% is produced as ingots.
The ingots are then heated in a soaking pit and hot rolled into slabs, blooms, or billets. Slabs are hot or cold rolled into sheet metal or plates. Billets are hot or cold rolled into bars, rods, and wire. Blooms are hot or cold rolled into structural steel, such as I-beams and rails. In modern steel mills these processes often occur in one assembly line, with ore coming in and finished steel products coming out.Sometimes after a steel's final rolling it is heat treated for strength, however this is relatively rare.
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Skype:Lucy Xie,SEKO Machinery

Suggested Reading:Raw steel production in US up 0.7 percent from previous week

2015年9月21日星期一

The SEKO Machinery's outdoor development training

On September 18, 2015, SEKO Machinery of the third group of partners involved in the 2 day outdoor development training. Development is a more self-understanding, to change yourself, improve yourself, increase awareness of team, the opportunity to enhance teamwork and team spirit, is each partner began to journey of self-improvement. The development mainly through some team game and challenge themselves, place oneself among them, were deeply understand the importance of the team and every progress and breakthrough of the self. Participate in this activity is mainly SEKO Machinery mechanical technology sector partners, they are strict with ourselves, keep improving, hoping to play a maximum team potential, and the greatest power of implementation team. Every day busy in the design of their research and development of stainless steel pipe machine, hard work and efforts, the company hope that through this opportunity to let them better cooperation, better coordination, execution and improve team work efficiency.

Guangdong Shunde Seko Machinery & Technology Co.,Ltd.www.gdseko.com
Lucy Xie

sevvice@gdseko.com
Skype:Lucy Xie,SEKO Machinery

Suggested Reading:Steel Market Forecast 2015-2025 Future Opportunities for Leading Companies

2015年9月20日星期日

SEKO Machinery to visit Thailand Dussel exhibition

On September 14, 2015, in order to better understand the industry development, understand the market dynamics, understanding of emerging technologies, SEKO Machinery general manager Mr Lv Haihui and deputy general manager Mr XiaoYuanPing went to Thailand to visit Thailand Dussel exhibition.On September 21st, their triumphant return, the Thailand trip ended smoothly.




Guangdong Shunde Seko Machinery & Technology Co.,Ltd.www.gdseko.com
Lucy Xie

sevvice@gdseko.com
Skype:Lucy Xie,SEKO Machinery

Suggested Reading:The SEKO Machinery company developed successfully a new kind of polishing machine

2015年9月19日星期六

The SEKO Machinery company developed successfully a new kind of polishing machine

The Guangdong Shunde Seko Machinery Co.,Ltd. successfully developed a new type of stainless steel pipe polishing machine, unlike traditional stainless steel pipe polishing machine, it can be installed on the production line, synchronization with production line, higher yield, more efficient, more stable, more safe. This new machine has been in trial production. Now we are actively apply for a patent, a patented will put into the market. Company invites you to visit our factory tour guide, to discuss the stainless steel industry technology. Look forward to working with you to achieve win-win together


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Skype:Lucy Xie,SEKO Machinery

Suggested Reading:The influence of heat treatment time and temperature


2015年9月18日星期五

The influence of heat treatment time and temperature

Proper heat treating requires precise control over temperature, time held at a certain temperature and cooling rate.
With the exception of stress-relieving, tempering, and aging, most heat treatments begin by heating an alloy beyond the upper transformation (A3) temperature. This temperature is referred to as an "arrest" because, at the A3 temperature nothing happens. Therefore, the alloy must be heated above the temperature for a transformation to occur. The alloy will usually be held at this temperature long enough for the heat to completely penetrate the alloy, thereby bringing it into a complete solid solution.

Because a smaller grain size usually enhances mechanical properties, such as toughness, shear strength and tensile strength, these metals are often heated to a temperature that is just above the upper critical temperature, in order to prevent the grains of solution from growing too large. For instance, when steel is heated above the upper critical temperature, small grains of austenite form. These grow larger as temperature is increased. When cooled very quickly, during a martensite transformation, the austenite grain-size directly affects the martensitic grain-size. Larger grains have large grain-boundaries, which serve as weak spots in the structure. The grain size is usually controlled to reduce the probability of breakage.

The diffusion transformation is very time-dependent. Cooling a metal will usually suppress the precipitation to a much lower temperature. Austenite, for example, usually only exists above the upper critical temperature. However, if the austenite is cooled quickly enough, the transformation may be suppressed for hundreds of degrees below the lower critical temperature. Such austenite is highly unstable and, if given enough time, will precipitate into various microstructures of ferrite and cementite. The cooling rate can be used to control the rate of grain growth or can even be used to produce partially martensitic microstructures.[13] However, the martensite transformation is time-independent. If the alloy is cooled to the martensite transformation (Ms) temperature before other microstructures can fully form, the transformation will usually occur at just under the speed of sound.

When austenite is cooled slow enough that a martensite transformation does not occur, the austenite grain size will have an effect on the rate of nucleation, but it is generally temperature and the rate of cooling that controls the grain size and microstructure. When austenite is cooled extremely slow, it will form large ferrite crystals filled with spherical inclusions of cementite. This microstructure is referred to as "sphereoidite." If cooled a little faster, then coarse pearlite will form. Even faster, and fine pearlite will form. If cooled even faster, bainite will form. Similarly, these microstructures will also form if cooled to a specific temperature and then held there for a certain time.

Most non-ferrous alloys are also heated in order to form a solution. Most often, these are then cooled very quickly to produce a martensite transformation, putting the solution into a supersaturated state. The alloy, being in a much softer state, may then be cold worked. This cold working increases the strength and hardness of the alloy, and the defects caused by plastic deformation tend to speed up precipitation, increasing the hardness beyond what is normal for the alloy. Even if not cold worked, the solutes in these alloys will usually precipitate, although the process may take much longer. Sometimes these metals are then heated to a temperature that is below the lower critical (A1) temperature, preventing recrystallization, in order to speed-up the precipitation.

Guangdong Shunde Seko Machinery & Technology Co.,Ltd.www.gdseko.com
Lucy Xie

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Skype:Lucy Xie,SEKO Machinery

Suggested Reading:The physical process of heat treatment

2015年9月16日星期三

The physical process of heat treatment

The physical process of heat treatment


Time:2015-9-17 13:56:10

Metallic materials consist of a microstructure of small crystals called "grains" or crystallites. The nature of the grains (i.e. grain size and composition) is one of the most effective factors that can determine the overall mechanical behavior of the metal. Heat treatment provides an efficient way to manipulate the properties of the metal by controlling the rate of diffusion and the rate of cooling within the microstructure. Heat treating is often used to alter the mechanical properties of a metallic alloy, manipulating properties such as the hardness, strength, toughness, ductility, and elasticity.
There are two mechanisms that may change an alloy's properties during heat treatment: the formation of martensite causes the crystals to deform intrinsically, and the diffusion mechanism causes changes in the homogeneity of the alloy.
The crystal structure consists of atoms that are grouped in a very specific arrangement, called a lattice. In most elements, this order will rearrange itself, depending on conditions like temperature and pressure. This rearrangement, called allotropy or polymorphism, may occur several times, at many different temperatures for a particular metal. In alloys, this rearrangement may cause an element that will not normally dissolve into the base metal to suddenly become soluble, while a reversal of the allotropy will make the elements either partially or completely insoluble.
When in the soluble state, the process of diffusion causes the atoms of the dissolved element to spread out, attempting to form a homogenous distribution within the crystals of the base metal. If the alloy is cooled to an insoluble state, the atoms of the dissolved constituents (solutes) may migrate out of the solution. This type of diffusion, called precipitation, leads to nucleation, where the migrating atoms group together at the grain-boundaries. This forms a microstructure generally consisting of two or more distinct phases. Steel that has been cooled slowly, for instance, forms a laminated structure composed of alternating layers of ferrite and cementite, becoming soft pearlite.
Unlike iron-based alloys, most heat treatable alloys do not experience a ferrite transformation. In these alloys, the nucleation at the grain-boundaries often reinforces the structure of the crystal matrix. These metals harden by precipitation. Typically a slow process, depending on temperature, this is often referred to as "age hardening".
Many metals and non-metals exhibit a martensite transformation when cooled quickly(with external media like oil,polymer, water etc.). When a metal is cooled very quickly, the insoluble atoms may not be able to migrate out of the solution in time. This is called a "diffusionless transformation." When the crystal matrix changes to its low temperature arrangement, the atoms of the solute become trapped within the lattice. The trapped atoms prevent the crystal matrix from completely changing into its low temperature allotrope, creating shearing stresses within the lattice. When some alloys are cooled quickly, such as steel, the martensite transformation hardens the metal, while in others, like aluminum, the alloy becomes softer.
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Suggested Reading:Welding Process Variations

2015年9月15日星期二

Welding Process Variations

1Pulsed-current
In the pulsed-current mode, the welding current rapidly alternates between two levels. The higher current state is known as the pulse current, while the lower current level is called the background current. During the period of pulse current, the weld area is heated and fusion occurs. Upon dropping to the background current, the weld area is allowed to cool and solidify. Pulsed-current GTAW has a number of advantages, including lower heat input and consequently a reduction in distortion and warpage in thin workpieces. In addition, it allows for greater control of the weld pool, and can increase weld penetration, welding speed, and quality. A similar method, manual programmed GTAW, allows the operator to program a specific rate and magnitude of current variations, making it useful for specialized applications.

2Dabber

The dabber variation is used to precisely place weld metal on thin edges. The automatic process replicates the motions of manual welding by feeding a cold filler wire into the weld area and dabbing (or oscillating) it into the welding arc. It can be used in conjunction with pulsed current, and is used to weld a variety of alloys, including titanium, nickel, and tool steels. Common applications include rebuilding seals in jet engines and building up saw blades, milling cutters, drill bits, and mower blades.
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Suggested Reading:Welding Shielding Gas

2015年9月14日星期一

Gas tungsten arc welding

TIG welding of a bronze sculpture.
Gas tungsten arc welding(GTAW), also known as tungsten inert gas (TIG) welding, is an arc welding process that uses a non-consumable tungsten electrode to produce the weld. The weld area is protected from atmospheric contamination by an inert shielding gas (argon or helium), and a filler metal is normally used, though some welds,known as autogenous welds, do not require it. A constant-current welding power supply produces electrical energy, which is conducted across the arc through a column of highly ionized gas and metal vapors known as a plasma.
GTAW is most commonly used to weld thin sections of stainless steel and non-ferrous metals such as aluminum, magnesium, and copper alloys. The process grants the operator greater control over the weld than competing processes such as shielded metal arc welding and gas metal arc welding, allowing for stronger, higher quality welds. However, GTAW is comparatively more complex and difficult to master, and furthermore, it is significantly slower than most other welding techniques. A related process, plasma arc welding, uses a slightly different welding torch to create a more focused welding arc and as a result is often automated.

Guangdong Shunde Seko Machinery & Technology Co.,Ltd.www.gdseko.com
Lucy Xie
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Skype:Lucy Xie,SEKO Machinery
Suggested Reading:The Annealing Machines Operating Principle and the Advantages


Welding Shielding Gas

As with other welding processes such as gas metal arc welding, shielding gases are necessary in GTAW to protect the welding area from atmospheric gases such as nitrogen and oxygen, which can cause fusion defects, porosity, and weld metal embrittlement if they come in contact with the electrode, the arc, or the welding metal. The gas also transfers heat from the tungsten electrode to the metal, and it helps start and maintain a stable arc.
The selection of a shielding gas depends on several factors, including the type of material being welded, joint design, and desired final weld appearance. Argon is the most commonly used shielding gas for GTAW, since it helps prevent defects due to a varying arc length. When used with alternating current, argon shielding results in high weld quality and good appearance. Another common shielding gas, helium, is most often used to increase the weld penetration in a joint, to increase the welding speed, and to weld metals with high heat conductivity, such as copper and aluminum. A significant disadvantage is the difficulty of striking an arc with helium gas, and the decreased weld quality associated with a varying arc length.

Argon-helium mixtures are also frequently utilized in GTAW, since they can increase control of the heat input while maintaining the benefits of using argon. Normally, the mixtures are made with primarily helium (often about 75% or higher) and a balance of argon. These mixtures increase the speed and quality of the AC welding of aluminum, and also make it easier to strike an arc. Another shielding gas mixture, argon-hydrogen, is used in the mechanized welding of light gauge stainless steel, but because hydrogen can cause porosity, its uses are limited.[32] Similarly, nitrogen can sometimes be added to argon to help stabilize the austenite in austenitic stainless steels and increase penetration when welding copper. Due to porosity problems in ferritic steels and limited benefits, however, it is not a popular shielding gas additive.
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Suggested Reading:Gas tungsten arc welding

2015年9月11日星期五

New Horizons in Steel Markets 10th Annual Conference in Istanbul

Now has known that this not-to-be-missed rendezvous of the year for the global steel market will be held on November 19, 2015 at Istanbul Marriott Hotel Asia.
The Turkish Steel Market Conference, organized since 2006 in Istanbul by SteelOrbis, acquired a greater international dimension in 2014 with a change of name to New Horizons in Steel Markets, while it attracted almost 500 participants.
Attendees at this conference have the opportunity to hear presentations from important players in the global steel market regarding the main issues and latest trends in the market, in addition to the expectations for the future. The conference also include the participation of special guest speakers, such as renowned economists who give their appraisal of the latest economic issues, as well as inspiring speakers from outside the steel industry.
Who will you meet?
From the international steel industry, you will meet major:
Steel producers
Traders
Raw material suppliers
Steel mills
Steel service centers
Tube & pipe industry players
Stainless steel market executives
Representatives from finance, logistics and technology companies
Executives from automotive, white goods and construction industries

Guangdong Shunde Seko Machinery & Technology Co.,Ltd.www.gdseko.com
Lucy Xie

sevvice@gdseko.com
Skype:Lucy Xie,SEKO Machinery

Suggested Reading:What is high frequency (HF) induction welding?

The Annealing Machine’s Operating Principle and the Advantages

Operating Principle
Frequency conversion electromagnetic induction heating or induction heating for short is a method for heating metal materials by converting power frequency power supply into that of specific range based on the principle of electromagnetic induction. It is mainly applicable to the metal hot working, heat treatment, welding and melting. This type of heating technique is also applicable to packing industry (such as sealing of aluminum foil used in medicine and food industry), semiconductor material (such as extruded monocrystalline silicon and heated affixing metal parts for auto glass).
Basic components of induction heating system include induction coil, AC power source and work pieces. Induction coil can be fabricated into different shapes as per different heated objects. The coil is connected with the power source providing alternating current for coil. The alternating current possessed by the coil can create a alternating magnetic field passing through the work pieces to produce eddy flow as required by heating.
Advantages of Induction Heating Equipment
1. Fast heating: the minimum rate of heating is less than 1 second (rate of heating is available for adjustment and control).
2. Wide coverage of heating: it can be used to heat various metal parts (replace removable induction coil as per different operating switches).
3. Easy installation: it can be used once it is connected with power source, induction coil as well as water supply pipe and rising pipe; it is small in size and light in weight.
4. Easy operation: you can learn to operate it within several minutes.
5. Fast start-up: it can be started to perform heating operation on condition that water and power supply is available.
6. Low power consumption: As compared with conventional vacuum tube high frequency equipments, it can save the power by approximately 70%. The smaller the size of the work piece is, the lower power consumption would be.
7. High effectiveness: it has such features as uniform heating (it is applicable to adjust the spacing of the induction coil to ensure the appropriate temperature as required by each part of work piece), fast warming and limited oxic horizon, and can guard against any waste after annealing.
8. Comprehensive protection: it has such functions as overpressure, over-current, overheat and water shortage alarm indications as well as automatic control and protection.
9. Controllable temperature: it is applicable to control the temperature for heating work pieces as per the preset heating time, and thereby control the heating temperature at a certain technical point.
10. Comprehensive full load design: it can work continuously for 24 hours.
11. Small size and light weight: it has a weight of only several dozens of kilograms, of which, the limited floor space can effectively save the workshop space.
12. Elimination of high voltage: it requires no step-up transformer which may produce approximately ten thousand voltage, and thus can ensure the maximum safety.


Guangdong Shunde Seko Machinery & Technology Co.,Ltd.www.gdseko.com
Lucy Xie

sevvice@gdseko.com
Skype:Lucy Xie,SEKO Machinery

Suggested Reading:New Horizons in Steel Markets 10th Annual Conference in Istanbul

2015年9月9日星期三

The China Map 2015 is available for purchase on our online bookshop in hard copy or PDF format. Clic

The World Steel Association (worldsteel) has published the 2015 edition of its map of Chinese mainland steel plants. It is available for purchase as a large format wall poster or a PDF file on worldsteel.org.
The map shows the geographical and economic landscape of the country’s steel industry at a glance.
It includes information such as:
Crude steel production and steel product type by company 2014
• Production of crude steel, iron ore and coke by province 2014
• Steel production by product type 2014
• Crude steel production and apparent crude steel use since 2001
• Apparent crude steel use per capita since 2001
• Structure of iron ore supply since 2001
The map is available for purchase from the Bookshop at worldsteel.org. The colourful poster measures 120cm by 67.5cm.
Notes to Editors:
The World Steel Association (worldsteel) is one of the largest and most dynamic industry associations in the world. worldsteel represents approximately 170 steel producers (including 9 of the world's 10 largest steel companies), national and regional steel industry associations and steel research institutes. worldsteel members represent around 85% of world steel production.
Megatonne (Mt) is a metric unit equivalent to 1 million tonnes.
 
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Suggested Reading: Powder Technology about the Stainless steel

2015年9月8日星期二

Technology of black coloring for stainless steel by electrochemical method

The technology of black coloring for stainless steel by electrochemical method was studied. The optimum bath compositions and operating conditions were obtained as follows: 40 – 50 g/L K2Cr2O7, 15 – 20 g/L MnSO4, 15 – 20 g/L (NH4)2SO4, 20 – 40 g/L H3BO3, 20 – 30 g/L additive A, 2 g/L (NH4)6Mo7O24; time 9 – 20 min; temperature 15 – 30 °C; potential 3 V and current density 1 – 2 mA/cm2. The effects of the compositions of the bath on the quality of black colored film were discussed. The influences of passivation process on the black coloring velocity and performances of black colored film layer were investigated. The results show that the passivation process can improve the corrosion resistance and the stability to bear color-change; (NH4)2SO4 can cantrol the black coloring velocity and prolong black coloring bath life remarkably; and additive A can improve the evenness and compactness of black colored film layer. The results of scanning electron microscopy and energy dispersive spectra show that the microstructure is of cylindrical lump, the filling process can decrease the crackles, and the main elements of black colored film are Fe, Cr, Mn and Ni.

Guangdong Shunde Seko Machinery & Technology Co.,Ltd.
www.gdseko.com
Lucy Xie

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Skype:Lucy Xie/Xie Xinmei

Suggested Reading: A Perfect Ending for 2015 Shanghai International Exhibition of SS Pipes

What is high frequency (HF) induction welding?

High frequency induction welding is used to make pipe or tube from strip which is fed into rolls which form the strip into a cylindrical shape. The faying edges are brought together between squeeze rolls to produce a V at the point of welding, with an included angle of typically 2-5° for steel.
A high frequency coil introduces current into the tube ahead of the squeeze rolls. This current is concentrated on the edges of the strip in the V and resistance heats a narrow zone at the edges to the welding temperature. The squeeze rolls consolidate the weld by expelling any melted material and contaminants and forming a small upset bead inside and outside the tube. These beads may be immediately scarfed from the tube to give a smooth surface. Thin wall steel tube may be welded at up to a few hundred m/min.

 Guangdong Shunde Seko Machinery & Technology Co.,Ltd.www.gdseko.com
Lucy Xie

sevvice@gdseko.com
Skype:Lucy Xie/Xie Xinmei

Suggested Reading: The China Map 2015 is available for purchase on our online bookshop in hard copy or PDF format. Clic


2015年9月7日星期一

Powder Technology about the Stainless steel

Development and property identification of 316L stainless steel feedstock for PIM and µPIM.
Micro Powder Injection Moulding (µPIM) is one of the key technologies for manufacturing 3D near net shape micro-components. We can examine the properties and behaviour of sinter feedstocks using very fine powders with different binder systems at now. A feedstock made from mixtures of a 16 µm particle size powder and two different binder systems are compared with the same particle size commercial feedstock. For the evaluation of the influence of the particle size of the powder on viscous behaviour of feedstock, a 5 µm feedstock mixed by our research group has been compared with 16 µm commercial feedstock. The 5 µm feedstock has been used for Micro PIM experiment, including injection, debinding and sintering stages. The mechanical properties and shrinkage of final sintered parts made with different sintering cycles have been determined. Another part of the paper is the real-time test of the shrinkage rate of a cylindrical specimen in a dilatometer during the sintering stage. And the identification of a thermo-elasto-viscoplastic constitutive law for sintering model. This allows the prediction of the shrinkage, the relative density, the final residual stress and deformation of micro-components.
 
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Suggested Reading: Technology of black coloring for stainless steel by electrochemical method

2015年9月5日星期六

The popular B2B platform in China

The popular B2B platform in China:Alibaba,Make-in-china,global sources,EC21,ECPLAZA,Tradekey,Ebay,gongchang,Asian Products,DIYtrade,China.cn,EVCC and so on.

Steel tube/pipe conference—Houston,U.S.A

America’s largest gathering for the steel, tube and pipe industry welcomes its dedicated and new attendees back to Houston in March, 2016.Consistency and reliability; these are the two words the conference embodies.
Though conditions have been tough for companies with exposure to the recent downtrend in oil prices, opportunities for growth never disappear. Be among those who capitalize in this challenging environment,work harder to develop more advanced ss pipe making machinery and beat our competitors are our belief in such a situation.
Hope one day we can sit with these advanced engineers from all over the world in the meeting room and discuss about themachinery technology.


Guangdong Shunde Seko Machinery & Technology Co.,Ltd.
www.gdseko.com
Shelly
sales6@gdseko.com
Skype:lshelly520

A Perfect Ending for 2015 Shanghai International Exhibition of SS Pipes

A perfect ending is drawn to the ninth session of Shanghai international exhibition & 2015 Shanghai international exhibition of stainless steel pipes on September 2th,2015.Seko reap plentiful and substantial fruits in this exhibition.We receive about 400 inquiry in these three days.Such a great achievement can’t be achieved without our customers support and trust,the exhibition staffs’ hard work,all Seko’s staffs’ hard work,their specific work arrangement deployment before the exhibition and their insistence in high quality and perfect service.
The general manager of Seko ,Mr.Xiao says,"Good is not our objective.We aim at making the best product in the world.So we keep improving ourselves,hard-working and innovating technology.We devoted,devote and will devote to make the advanced & high-quality stainless steel pipe making machinery that satisfy all customers.We make it as our mission to provide customers the best stainless steel pipe making machinery and service because we can't live up to our customers' trust."

Guangdong Shunde Seko Machinery & Technology Co.,Ltd.
www.gdseko.com
Shelly
sales6@gdseko.com
Skype:lshelly520
Suggested Reading:Celebrate 70th anniversary of the anti-fascist war

Celebrate 70th anniversary of the anti-fascist war

On September 3th and 4th,2015, all Seko's staffs released from work because a grand triumphal review of troops is held in Beijing to celebrate the 70th anniversary of the anti-fascist war.It is such a grand occasion that many other state leaders attended and witnessed China's strength.They thought highly of this ceremony.We all are pround of our country and feel grateful to the veterans of anti-fascist war.Salute to them,without them,we can't live happily. Now I want to share our pleasure with you and inform you that today is the normal working time,welcome to send us your inquiry.





After the review of troops,many politicians' wife go Beijing's shopping centre and buying a lot of goods.

Guangdong Shunde Seko Machinery & Technology Co.,Ltd.
www.gdseko.com
Shelly
sales6@gdseko.com
Skype:lshelly520
Suggested Reading:



Tags:review of troops,70th anniversary of the anti-fascist war,阅兵,抗战胜利70周年

India's steel market situation 3

1.Cost of steel making in India
The costs of Indian steel timber product are lower than that of China because they own their own mining and has a advantage of low cost. However,their yield of steel strips and steel pipes are much lower than China.If they can own the advanced stainless steel pipe making machinery,their yield of stainless steel pipe will be improved greatly.Seko’s stainless steel pipe making machinery are recommended.
2.The analysis of Indian export situation in the future
As India is in great demand for steel,its demand for steel exceed supply, it can only rely on import steel to satisfy its need.It has become a net importer of steel completely.Although this situation has been improved since 2010,many steel manufacturers rush to invest steel hot rolled coil nearly in the same period.This is easy to lead to excess production capacity in the future,and the Middle East and southeast Asia will become its export market.
Generally speaking,India’s rapid development and poor infrastructure make it in great demand for steel.It can only rely on import steel to satisfy its need currently.However,it is expected that India is likely to export to Middle East and southeast Asia market in the future if it meet its domestic demand because its domestic steel production capacity is expanding gradually.However,it is not easy for India’s steel to enter into the Middle East and southeast Asia market as they have regular suppliers.Besides,many political and economic factors affect this districts’ demand for steel as well.
Guangdong Shunde Seko Machinery & Technology Co.,Ltd.
www.gdseko.com
Shelly
sales6@gdseko.com
Skype:lshelly520
Suggested Reading:India's steel market situation 1

2015年9月2日星期三

India's steel market situation 2

As stated in the last passage India's steel market situation 1,We hold the belief India’s steel industry is with great potential because of India’s great macroeconomic growth potential and rich iron ore resources.However,the outdated infrastructure,poor coking coal resources and any other factors will hinder its development obviously.Following comes the hinder factors.
Firstly,India rely on importing coking coal whose net import reaches 13.95% to make steel in recent years.
Secondly,India’s weak infrastructure such as railways and ports,make the delivery cost of iron ore high.Besides,the outdated winning equipment is not good for the growth of the iron ore production capacity.
Railway: India's existing railway transport system still cannot satisfy the need of transportation of the steel and does not attract enough investment to update the tracks and establish new lines.All these unnecessary transportation costs will worse the relations among the raw material supplier,steel factory and consumption center region.
Highway;India still does not finish the highway construction that it plan to finish by the end of 20.05.It is obvious that radiation of the road transportation system is weak.
The current density index of highway in India is about 25%, and the highway concentrated outside the steel plant center.This restrict the development of local iron and steel industry seriously.
Port: Generally,the international benchmarks turnaround of containers round will take 24 hours, but in India's best ports such as JNPT and COCHIN port,it will take about 40 to 50 hours and in the common port such as CHENNAI port,it will take about 125 hours.Due to the the small port throughput in India, the iron and steel enterprises usually have to keep the high inventory of raw materials.If so,they should pay the high port demurrage charge of raw materials,which is bad for the transport circulation of the steel goods.
Power: the power sector in India is poor, low generating capacity, big frequency fluctuations,little parameters for equipment are conformable.Besides,due to electric leakage in the process of transmission,power loss is about 25% to 30%,many steel manufacturers have to install electrical equipment to generate electricity by themselves.This will lead to the unnecessary increase on the costs.
Thirdly,Indian steel manufacturers will meet with opposition from the rural leaders and lefties when they do site selection and plant expansion.
Fourthly,the India government adopt some measures to limit the price increase of the steel in domestic.And they prohibit the steel manufacturers to earn profits when exporting iron ore and allow the miners of iron ore and traders to export oversea,this aggravates a lot of steel manufacturers.
Fifthly,the frequent fluctuation of exchange rate on the foreign exchange market will inevitably affect the company's financial performance.

Guangdong Shunde Seko Machinery & Technology Co.,Ltd.
www.gdseko.com
Shelly
sales6@gdseko.com
Skype:lshelly520
Suggested Reading:India's steel market situation 3

India's steel market situation 1

As India is one of the important market of Seko Machinery,Seko pay attention to the Indian steel market situation closely.We sold many stainless steel pipe making machinery to India and established long-term business relations with many Indian customers.So keep an eye on the development of Indian steel indutry benefits both our customers and us.
1.Indian Steel Types:
Indian major steel products are long steel, flat steel and steel pipe and 50% of the Indian steel production is long steel,46% of it is flat steel and 3% of it is steel tubes.


2.India's domestic steel consumption
  India's domestic steel consumption grows steadily,mainly focus on the industry of real estate (including construction), machinery, automobile and the other industries.However,India’s mechanical industry only accounted for little of the total steel consumption.Its construction industry demand for about 60% of India's steel and automobile industry demand for 15%.As for the economic slowdown, India's steel consumption grow slowly. Indian Joint Plant Committee according states that from April to December, 2014,India's steel consumption only grew 1.4% year-on-year to 55.24 million tons.
In 2013, India's steel consumption per capita is 57.8 kg, while Japan’s is 516.8 kg, China’s is 545 kg, the America’s is 300.8 kg. India's steel consumption per capita is on the low side,this reflects its low urbanization development.However,the development models of the other major economies suggest that India's steel consumption per person will continue to grow although its growth depends on the urbanization and industrialization level largely.


India’s great macroeconomic growth potential and rich iron ore resources can help its steel industry to develop greatly.However,the outdated infrastructure and poor coking coal resources will hinder its development.We hold the belief India’s steel industry is with great potential.if its steel consumption per person reaches that of China currently,its demand for steel will increase by 10 times.
Guangdong Shunde Seko Machinery & Technology Co.,Ltd.
www.gdseko.com
Shelly
sales6@gdseko.com
Skype:lshelly520
Suggested Reading:India's steel market situation 2