TIMOTHY HOLDING CO.,LTD. Press releases

Steel Rolling Mill Technology

Author: august zeng

http://www.timothyholding.com/

Steel Rolling Mill Technology.

Steel Mill Operation.
Steel mills smelt raw materials with limestone or coke in a blast furnace. This produces molten ore, which is converted to such products as sheets, ingots and slabs via hot or cold rolling.

Hot Rolling
The hot rolling process takes place above a material's recrystallization temperature. The grains contained in the molten steel deform during heating, then recrystallize. The starting material is fed through the rolling mill and processed at a temperature that must be maintained above the recrystallization temperature to prevent hardening during the process. Hot rolling is often used to produce steel sheets or simple cross-section materials such as rail tracks.


Cold Rolling
Cold rolling occurs when the steel is at a temperature below its recrystallization temperature. This increases the steel's strength via strain hardening, or hardening that is produced via dislocation movements within a material's crystal structure. Cold rolled materials are often smaller because it is not as effective as hot rolling at decreasing the thickness of a workpiece in a single pass. Cold rolled products often come in the form of rods, strips and bars.

http://www.timothyholding.com/

http://www.timothyholding.com/

Steel Rolling Mill Technology

Steel Mill Operation

Steel mills smelt raw materials with limestone or coke in a blast furnace. This produces molten ore, which is converted to such products as sheets, ingots and slabs via hot or cold rolling.

Hot Rolling

The hot rolling process takes place above a material's recrystallization temperature. The grains contained in the molten steel deform during heating, then recrystallize. The starting material is fed through the rolling mill and processed at a temperature that must be maintained above the recrystallization temperature to prevent hardening during the process. Hot rolling is often used to produce steel sheets or simple cross-section materials such as rail tracks.

Cold Rolling

Cold rolling occurs when the steel is at a temperature below its recrystallization temperature. This increases the steel's strength via strain hardening, or hardening that is produced via dislocation movements within a material's crystal structure. Cold rolled materials are often smaller because it is not as effective as hot rolling at decreasing the thickness of a workpiece in a single pass. Cold rolled products often come in the form of rods, strips and bars.

http://www.timothyholding.com/