What is the difference between cold rolled aluminum sheet and hot rolled aluminum sheet?
2021-02-04
What is the difference between cold rolled aluminum sheet and hot rolled aluminum sheet?
The difference between cold-rolled aluminum sheet and hot-rolled aluminum sheet: the rolling of aluminum sheet at room temperature is generally understood as cold rolling. From a metallurgical point of view, rolling below the crystallization temperature is cold rolling. Hot rolling uses slabs (mainly continuous casting slabs) as raw materials, which are heated to produce strip steel from roughing and finishing mills.
Cold-rolled aluminum plate: Hot-rolled steel coil is used as the raw material, and the oxide scale is removed by pickling and then cold-rolled. The finished product is a hard-rolled coil. The cold work hardening caused by continuous cold deformation increases the strength and hardness of the hard-rolled coil. The tough plastic index drops, so the stamping performance will deteriorate, and it can only be used for simple deformed parts. Hard-rolled coils can be used as raw materials for hot-dip galvanizing plants because the hot-dip galvanizing units are equipped with annealing lines. The weight of the rolled hard coil is generally 6 to 13.5 tons, and the steel coil is continuously rolled on the hot-rolled pickled coil at room temperature.
Features:
Because it has not been annealed, its hardness is very high (HRB greater than 90), and its machining performance is extremely poor. It can only be processed with a simple directional bending process (perpendicular to the winding direction) of less than 90 degrees. To put it simply, a piece of steel billet is heated (that is, the hot steel piece that is burning red on the TV) after several passes, then trimmed, and straightened into a steel plate. This is called hot rolling.
Cold-rolled aluminum plates are processed and rolled on the basis of hot-rolled coils. Generally speaking, it is a process of hot rolling---pickling---cold rolling. Cold rolling is processed from hot-rolled sheets at room temperature. Although the rolling process will heat up the steel sheet, it is still called cold rolling.
Because the hot-rolled aluminum sheet is cold-rolled by continuous cold deformation, the mechanical properties are relatively poor and the hardness is too high. It must be annealed to restore its mechanical properties, and those without annealing are called rolled hard coils. Hard-rolled coils are generally used to make products that do not need to be bent or stretched, and those with a thickness of less than 1.0 are hard-rolled on both sides or four sides with good luck.
Email: alice@sigma-industry.com
WhatsApp: 0086-18818278637
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Tel:0086-19503302728
The difference between cold-rolled aluminum sheet and hot-rolled aluminum sheet: the rolling of aluminum sheet at room temperature is generally understood as cold rolling. From a metallurgical point of view, rolling below the crystallization temperature is cold rolling. Hot rolling uses slabs (mainly continuous casting slabs) as raw materials, which are heated to produce strip steel from roughing and finishing mills.
Cold-rolled aluminum plate: Hot-rolled steel coil is used as the raw material, and the oxide scale is removed by pickling and then cold-rolled. The finished product is a hard-rolled coil. The cold work hardening caused by continuous cold deformation increases the strength and hardness of the hard-rolled coil. The tough plastic index drops, so the stamping performance will deteriorate, and it can only be used for simple deformed parts. Hard-rolled coils can be used as raw materials for hot-dip galvanizing plants because the hot-dip galvanizing units are equipped with annealing lines. The weight of the rolled hard coil is generally 6 to 13.5 tons, and the steel coil is continuously rolled on the hot-rolled pickled coil at room temperature.
Features:
Because it has not been annealed, its hardness is very high (HRB greater than 90), and its machining performance is extremely poor. It can only be processed with a simple directional bending process (perpendicular to the winding direction) of less than 90 degrees. To put it simply, a piece of steel billet is heated (that is, the hot steel piece that is burning red on the TV) after several passes, then trimmed, and straightened into a steel plate. This is called hot rolling.
Cold-rolled aluminum plates are processed and rolled on the basis of hot-rolled coils. Generally speaking, it is a process of hot rolling---pickling---cold rolling. Cold rolling is processed from hot-rolled sheets at room temperature. Although the rolling process will heat up the steel sheet, it is still called cold rolling.
Because the hot-rolled aluminum sheet is cold-rolled by continuous cold deformation, the mechanical properties are relatively poor and the hardness is too high. It must be annealed to restore its mechanical properties, and those without annealing are called rolled hard coils. Hard-rolled coils are generally used to make products that do not need to be bent or stretched, and those with a thickness of less than 1.0 are hard-rolled on both sides or four sides with good luck.
Email: alice@sigma-industry.com
WhatsApp: 0086-18818278637
Wechat: 0086-19503302728
Tel:0086-19503302728