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Briefly Describe The Difference Between Hot-rolled And Cold-rolled Stainless Steel Sheets

Feb 21, 2021

Hot rolling: It is relative to cold rolling. Cold rolling is rolling below the recrystallization temperature, while hot rolling is rolling above the recrystallization temperature.

Its characteristics:

1. The toughness and surface smoothness are poor, and the price is low;

2. The temperature of hot rolling is similar to that of forging;

3. The hot plate is processed by hot rolling, and the surface has oxide skin, and the thickness of the plate is poor;

4. Due to its production technology, it is used for civilian purposes, such as tableware and general household appliances;

5. The mechanical properties of hot-rolled steel plates are far inferior to cold working and second to forging processing, but they have better toughness and ductility.

Cold rolling: It is processed and rolled on the basis of hot rolled coils. Generally speaking, it is a process of hot rolling→pickling→cold rolling. Although the rolling process will heat up the steel plate, it is still called cold rolling. Because hot rolling is cold rolled after 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. Rolled hard coils are generally used to make products that do not need to be bent or stretched.

Its characteristics:

1. Cold-rolled steel plate has a certain degree of work hardening, low toughness, and more expensive;

2. The cold-rolled surface has no oxide scale and good quality;

3. Products made by cold deformation have high dimensional accuracy and good surface quality;

4. Because of its production process, cold rolling is widely used in various industries, such as various cold stamping parts, cold rolled and cold extruded profiles, cold coil springs, cold drawn wires, cold heading bolts, etc.