The Difference Between Hot And Cold Rolling

1. Appearance and surface quality: Because the cold plate is hot plate after the cold rolling process, and the cold rolling will also be some surface finishing, so the cold plate in the surface quality (such as surface roughness, etc.) is better than the hot plate, so if there are higher requirements for the quality of the product after the order of paint coating, generally choose the cold plate, and the hot plate is divided into pickling plate and non-pickling plate, Pickled plate surface due to pickling so into the normal metal color, but not cold rolled so the surface is not cold plate high, not pickled plate surface will usually have an oxide layer with, hair black, or there is iron oxide black layer, generally speaking is like fire roasted, and if the storage environment is not good, usually with a point of embroidery.

2. Performance: In general, the mechanical properties of hot plate and cold plate are considered to be no difference in engineering. Although there is a certain work hardening of cold plate in the cold rolling process, (but it does not exclude the strict requirements for mechanical properties, it needs to be treated differently), the yield strength of cold plate is usually slightly higher than that of hot plate, and the surface hardness is also higher. How to see the degree of cold plate annealing. But no matter how the annealing cold plate strength is higher than the hot plate. 3, forming performance, because the performance of the hot and cold plate is basically poor, so the influencing factors of the forming performance will look at the difference of the surface quality, because the surface quality is better than the cold plate, so generally speaking, the steel plate with the same material, cold plate than hot plate forming appearance effect is better.