What is the difference between cold rolling and hot rolling of stainless steel plate

July 8, 2022

The difference between hot rolling and cold rolling of stainless steel is that cold rolling is rolled on the basis of hot rolling.


Cold rolling: It is processed and rolled on the basis of hot-rolled stainless steel plate and coil. Generally speaking, it is a processing process of hot rolling → pickling → cold rolling. Although the steel plate will heat up due to rolling during processing, it is still called cold rolling. Due to the continuous cold deformation of hot rolling, 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 hard rolled coils. Hard rolled coils are generally used to make products that do not require bending or stretching.


Its features:
1. Due to a certain degree of work hardening, cold-rolled steel sheets have low toughness and are more expensive;
2. The cold-rolled surface has no oxide scale, and the quality is good;
3. The product made by cold deformation has high dimensional accuracy and good surface quality;
4. Cold rolling is widely used in all walks of life due to its production process, such as various cold stamping parts, cold rolled cold extrusion profiles, cold coil springs, cold drawn wires, cold heading bolts, etc.


hot rolled
rolling): relative to cold rolling, cold rolling is rolling below the recrystallization temperature, while hot rolling is rolling above the recrystallization temperature.


Its features:
1. The toughness and surface flatness are poor, and the price is low;
2. The temperature of hot rolling is similar to that of forging;
3. The hot plate is hot rolled and has oxide skin on the surface, and the thickness of the plate is different;
4. Due to its production process, it is used in many civilian applications, such as kitchen utensils, general household appliances, etc.;
5. The mechanical properties of hot-rolled steel sheets are far inferior to those of cold working and forging, but they have better toughness and ductility.