Typically, large ovens are used for the annealing
process. The inside of the oven is large enough to place the work piece in a
position to receive maximum exposure to the circulating heated air. For high
volume process annealing, gas fired conveyor furnaces are often used. For large
workpieces or high quantity parts, car-bottom furnaces are used so workers can
easily move the parts in and out. Once the annealing process is successfully
completed, work pieces are sometimes left in the oven so the parts cool in a
controllable way. While some work pieces are left in the oven to cool in a
controlled fashion, other materials and alloys are removed from the oven. Once
removed from the oven, the workpieces are often quickly cooled off in a process
known as quench hardening. Typical methods of quench hardening materials
involve media such as air, water, oil, or salt. Salt is used as a medium for
quenching usually in the form of brine (salt water). Brine provides faster
cooling rates than water. This is because when an object is quenched in water
air bubbles form on the surface of the object reducing the surface area the
water is in contact with. The salt in the brine reduces the formation of air
bubbles on the object's surface, meaning there is a larger surface area of the
object in contact with the water, providing faster cooling rates. Quench
hardening is generally applicable to some ferrous alloys, but not copper
alloys. The working principle of the Seko Machinery’s Bright annealing machine and Black annealing machine are like
that.2016年2月22日星期一
Annealing setup and equipment
Typically, large ovens are used for the annealing
process. The inside of the oven is large enough to place the work piece in a
position to receive maximum exposure to the circulating heated air. For high
volume process annealing, gas fired conveyor furnaces are often used. For large
workpieces or high quantity parts, car-bottom furnaces are used so workers can
easily move the parts in and out. Once the annealing process is successfully
completed, work pieces are sometimes left in the oven so the parts cool in a
controllable way. While some work pieces are left in the oven to cool in a
controlled fashion, other materials and alloys are removed from the oven. Once
removed from the oven, the workpieces are often quickly cooled off in a process
known as quench hardening. Typical methods of quench hardening materials
involve media such as air, water, oil, or salt. Salt is used as a medium for
quenching usually in the form of brine (salt water). Brine provides faster
cooling rates than water. This is because when an object is quenched in water
air bubbles form on the surface of the object reducing the surface area the
water is in contact with. The salt in the brine reduces the formation of air
bubbles on the object's surface, meaning there is a larger surface area of the
object in contact with the water, providing faster cooling rates. Quench
hardening is generally applicable to some ferrous alloys, but not copper
alloys. The working principle of the Seko Machinery’s Bright annealing machine and Black annealing machine are like
that.
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