2015年11月23日星期一

EU new car registrations up 8.2 percent in January-October

In October this year, new car registrations totaled 1,104,868 units in the European Union (EU), with an increase of 2.9 percent year on year, while demand for new passenger cars saw growth slowing down in all major markets, according to the latest figures issued by the European Automobile Manufacturers’Association (ACEA). In October, Italy (+8.6 percent), Spain (+5.2 percent), Germany (+1.1 percent), and France (+1 percent) were the major EU markets which recorded increases in new car registrations on year-on-year basis. Meanwhile, in the January-October period new passenger car registrations in the EU increased to 11,523,903 units, up 8.2 percent year on year. In this period, Spain saw an increase of 20.5 percent and Italy saw an increase of 14.7 percent, while new passenger car registrations in the UK rose by 6.4 percent, with registrations in France rising by 5.7 percent and with registrations in Germany up 5.1 percent, all year-on-year basis.

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

Material science of Alloy steel

Alloying elements are added to achieve certain properties in the material. As a guideline, alloying elements are added in lower percentages (less than 5%) to increase strength or hardenability, or in larger percentages (over 5%) to achieve special properties, such as corrosion resistance or extreme temperature stability. Manganese, silicon, or aluminum are added during the steelmaking process to remove dissolved oxygen, sulfur and phosphorus from the melt. Manganese, silicon, nickel, and copper are added to increase strength by forming solid solutions in ferrite. Chromium, vanadium, molybdenum, and tungsten increase strength by forming second-phase carbides. Nickel and copper improve corrosion resistance in small quantities. Molybdenum helps to resist embrittlement. Zirconium, cerium, and calcium increase toughness by controlling the shape of inclusions. Sulfur in form of Manganese sulfide, lead, bismuth, selenium, and tellurium increase machinability. The alloying elements tend to form either solid solutions or compounds or carbides. Nickel is very soluble in ferrite; therefore, it forms compounds, usually Ni3Al. Aluminium dissolves in the ferrite and forms the compounds Al2O3 and AlN. Silicon is also very soluble and usually forms the compound SiO2•MxOy. Manganese mostly dissolves in ferrite forming the compounds MnS, MnO•SiO2, but will also form carbides in the form of (Fe,Mn)3C. Chromium forms partitions between the ferrite and carbide phases in steel, forming (Fe,Cr3)C, Cr7C3, and Cr23C6. The type of carbide that chromium forms depends on the amount of carbon and other types of alloying elements present. Tungsten and molybdenum form carbides if there is enough carbon and an absence of stronger carbide forming elements (i.e., titanium & niobium), they form the carbides W2C and Mo2C, respectively. Vanadium, titanium, and niobium are strong carbide forming elements, forming vanadium carbide, titanium carbide, and niobium carbide, respectively. Alloying elements also have an effect on the eutectoid temperature of the steel. Manganese and nickel lower the eutectoid temperature and are known as austenite stabilizing elements. With enough of these elements the austenitic structure may be obtained at room temperature. Carbide-forming elements raise the eutectoid temperature; these elements are known as ferrite stabilizing elements.

Guangdong Shunde Seko Machinery & Technology Co.,Ltd.www.gdseko.com
Lucy Xie
sevvice@gdseko.com
Skype:Lucy
Xie,SEKO Machinery
Suggested Reading: Alloy Steel Technology

2015年11月19日星期四

Indian customers to visit SEKO Company

The General Manager of a India steel company, Mr Singh come to visit SEKO Company today. Mr Singh and our Xiao Manager shaw had a friendly conversation about that he want to buy our Industrial Welded Pipe Production Line. He is very bullish on our products, this cooperation will involve more than millions of money.
        
Guangdong Shunde Seko Machinery & Technology Co.,Ltd.www.gdseko.com
Lucy Xie
sevvice@gdseko.com
Skype:Lucy
Xie,SEKO Machinery

Alloy Steel Technology

Alloy steel is steel that is alloyed with a variety of elements in total amounts between 1.0% and 50% by weight to improve its mechanical properties. Alloy steels are broken down into two groups: low-alloy steels and high-alloy steels. The difference between the two is somewhat arbitrary: Smith and Hashemi define the difference at 4.0%, while Degarmo, et al., define it at 8.0%.Most commonly, the phrase "alloy steel" refers to low-alloy steels.
Strictly speaking, every steel is an alloy, but not all steels are called "alloy steels". The simplest steels are iron (Fe) alloyed with carbon (C) (about 0.1% to 1%, depending on type). However, the term "alloy steel" is the standard term referring to steels with other alloying elements added deliberately in addition to the carbon. Common alloyants include manganese (the most common one), nickel, chromium, molybdenum, vanadium, silicon, and boron. Less common alloyants include aluminum, cobalt, copper, cerium, niobium, titanium, tungsten, tin, zinc, lead, and zirconium.

The following is a range of improved properties in alloy steels (as compared to carbon steels): strength, hardness, toughness, wear resistance, corrosion resistance, hardenability, and hot hardness. To achieve some of these improved properties the metal may require heat treating.

Some of these find uses in exotic and highly-demanding applications, such as in the turbine blades of jet engines, in spacecraft, and in nuclear reactors. Because of the ferromagnetic properties of iron, some steel alloys find important applications where their responses to magnetism are very important, including in electric motors and in transformers.

Guangdong Shunde Seko Machinery & Technology Co.,Ltd.www.gdseko.com
Lucy Xie
sevvice@gdseko.com
Skype:Lucy
Xie,SEKO Machinery
Suggested Reading: How to smelting steel?

Paris attacks: SEKO Machinery was in mourning.

On November 13,2015,the whole of the world was in mourning, we join them in this time of mourning. For the SEKO Machinery Company all staff it is a day of grief.
And We always believe that Violence can never destroy righteousness!
              
Guangdong Shunde Seko Machinery & Technology Co.,Ltd.www.gdseko.com
Lucy Xie
sevvice@gdseko.com
Skype:Lucy
Xie,SEKO Machinery
Suggested Reading:The history of steelmaking
 

How to smelting steel?

Modern steelmaking processes can be broken into two categories: primary and secondary steelmaking. Primary steelmaking involves converting liquid iron from a blast furnace and steel scrap into steel via basic oxygen steelmaking or melting scrap steel and/or direct reduced iron (DRI) in an electric arc furnace. Secondary steelmaking involves refining of the crude steel before casting and the various operations are normally carried out in ladles. In secondary metallurgy, alloying agents are added, dissolved gases in the steel are lowered, inclusions are removed or altered chemically to ensure that high-quality steel is produced after casting.
 

1Primary steelmaking

Basic oxygen steelmaking is a method of primary steelmaking in which carbon-rich molten pig iron is made into steel. Blowing oxygen through molten pig iron lowers the carbon content of the alloy and changes it into steel. The process is known as basic due to the chemical nature of the refractories—calcium oxide and magnesium oxide—that line the vessel to withstand the high temperature and corrosive nature of the molten metal and slag in the vessel. The slag chemistry of the process is also controlled to ensure that impurities such as silicon and phosphorus are removed from the metal.

The process was developed in 1948 by Robert Durrer and commercialized in 1952–53 by Austrian VOEST and ÖAMG.[citation needed] The LD converter, named after the Austrian towns of Linz and Donawitz (a district of Leoben) is a refined version of the Bessemer converter where blowing of air is replaced with blowing oxygen. It reduced capital cost of the plants, time of smelting, and increased labor productivity. Between 1920 and 2000, labour requirements in the industry decreased by a factor of 1,000, from more than 3 worker-hours per tonne to just 0.003. The vast majority of steel manufactured in the world is produced using the basic oxygen furnace; in 2011, it accounted for 70% of global steel output. Modern furnaces will take a charge of iron of up to 350 tons and convert it into steel in less than 40 minutes, compared to 10–12 hours in an open hearth furnace.

Electric arc furnace steelmaking is the manufacture of steel from scrap or direct reduced iron melted by electric arcs. In an electric arc furnace, a batch of steel ("heat") may be started by loading scrap or direct reduced iron into the furnace, sometimes with a "hot heel" (molten steel from a previous heat). Gas burners may be used to assist with the melt down of the scrap pile in the furnace. As in basic oxygen steelmaking, fluxes are also added to protect the lining of the vessel and help improve the removal of impurities. Electric arc furnace steelmaking typically uses furnaces of capacity around 100 tonnes that produce steel every 40 to 50 minutes for further processing.

By-product gases from the steel making process can be used to generate electricity through the use of reciprocating gas engines.

2Secondary steelmaking

Secondary steelmaking is most commonly performed in ladles and often referred to as ladle (metallurgy). Some of the operations performed in ladles include de-oxidation (or "killing"), vacuum degassing, alloy addition, inclusion removal, inclusion chemistry modification, de-sulphurisation and homogenisation. It is now common to perform ladle metallurgical operations in gas stirred ladles with electric arc heating in the lid of the furnace. Tight control of ladle metallurgy is associated with producing high grades of steel in which the tolerances in chemistry and consistency are narrow.

3HIsarna steelmaking

The HIsarna steelmaking process is a process for primary steelmaking in which iron ore is processed almost directly into steel. The process is based around a new type of blast furnace called a Cyclone Converter Furnace, which makes it possible to skip the process of manufacturing pig iron pellets that is necessary for the basic oxygen steelmaking process. Without the necessity for this preparatory step the HIsarna process is more energy-efficient and has a lower carbon footprint than traditional steelmaking processes.

Guangdong Shunde Seko Machinery & Technology Co.,Ltd.www.gdseko.com
Lucy Xie
sevvice@gdseko.com
Skype:Lucy
Xie,SEKO Machinery

2015年11月14日星期六

Iron ore production may scale new peak

Production of iron ore in China, the world's biggest consumer of the key steelmaking ingredient, will climb to a record this year as bigger mines open, adding to a global glut that's depressing prices.
Output of low-grade, unprocessed iron ore may rise 5.6 percent to 1.52 billion metric tons this year, Shi Zhenglei, a Shanghai-based analyst with Mysteel.com, China's largest industry consultancy, said in a phone interview. That'sabout 400 million tons of seaborne equivalent, he said.

The potential extra production from China comes even as iron ore entered a bear market in March and fell below $100 last month for the first time since 2012 as top miners including Rio Tinto Ltd and BHP Billiton Ltd expanded output. An increase in Chinese iron ore output would weigh on prices and boost steel mills' bargaining power over imports, Shi said.

"Larger mines are usually owned by steelmakers so production is mostly for their own need," said Shi. "Although mining is money-losing at current prices, they have to put the new mines into operation to achieve cash flow because they've spent a lot on the construction work."

Ore with 62 percent content delivered to the port of Tianjin declined 0.7 percent to $90.90 a dry ton on June 13, the lowest level since September 2012, according to The Steel Index Ltd. Prices lost 3.8 percent last week and retreated in eight of the past nine weeks.

Production of unprocessed ore in China was 1.44 billion tons last year, or about 380 million tons of seaborne equivalent, Mysteel's Shi said.

Iron content

Chinese iron ore typically contains half or less of the iron content found in ore from Australia, the world's top shipper. China's raw ore has an average iron content of 26 percent, according to Shi, compared with the global benchmark of 62 percent iron.

An oversupply of iron ore may last until 2020, Paul Gray, steel and iron ore markets analyst at Wood Mackenzie Ltd, told reporters in Sydney on Monday. Wood Mackenzie forecasts an average iron ore price of $101 a ton in the second-half of 2014 and $98 a ton in 2015, he said.

Morgan Stanley last week reduced its estimate for average iron ore prices to $105 a ton this year from an earlier forecast of $118 in May. Prices may average about $90 a ton in 2015, a drop of 21 percent from an earlier estimate, the bank said.

Producers in China face a rising challenge of cheaper supplies from Australia and Brazil that are spurring a global glut and hurting prices, according to Goldman Sachs Group Inc and Australia and New Zealand Banking Group Ltd. Australia's share of Chinese iron ore imports are forecast to increase to more than 60 percent by 2020, Wood Mackenzie forecast on Monday.

Guangdong Shunde Seko Machinery & Technology Co.,Ltd.www.gdseko.com
Lucy Xie
sevvice@gdseko.com
Skype:Lucy
Xie,SEKO Machinery