Difference between cold rolling and hot rolling

1. Appearance and surface quality: Because of cold plate is, resulting from the hot plate in cold rolling process and cold rolling at the same time also will make some surface finishing so cold plate on the surface quality (such as surface roughness, etc.) better heat plate, so if the product after the sequence on the quality of paint coating, such as there are higher requirements, generally choose the cold plate, hot plate and the other points and pickling plate, pickling board Pickling plate surface due to pickling so normal metal color, but not cold rolled so the surface is not high cold plate, pickling plate surface usually has oxide layer with, hair black, or the presence of ferric oxide black layer, generally speaking, is fire roasted, and if the storage environment is not good, usually with embroidery.

2. Performance: Studied experimentally under normal circumstances, the hot plate and its mechanical properties in engineering is no more think of, although there are certain work hardening heat pipes in the process of cold rolling, (but do not rule out strict in mechanical properties, that is need to discriminate), cold plate heat plate usually slightly high yield strength, surface hardness is higher, what specific needs to see the degree of cold plate annealing. But no matter how the strength of the annealed cold plate is higher than the hot plate.

3, forming performance, because the performance of the cold and hot plate is not too much, so the influencing factors of the forming performance will depend on the difference of the surface quality, because the surface quality is better, so usually speaking of the same material of the steel plate, cold plate than hot plate forming appearance effect is better.

The material: VW 50065 CR210IF