1. Different production methods
Cold rolling is relative to hot rolling. Hot rolling is a kind of rolling performed above the crystallization temperature, while cold rolling is a kind of rolling performed below the crystallization temperature. When the steel plate comes out, it is initially processed first. According to the hot rolling process, if it leaves the factory directly, it is a hot-rolled steel plate. The hot-rolled steel plate is then made through the cold-rolling process and is a cold-rolled steel plate. to
2. Different surface quality
The quality of the surface structure of cold rolled steel will be better than that of hot rolled steel.
3. Different mechanical properties
The work hardening effect, or cold work hardening, results in the hardness of the surface of cold-rolled plates and hot-rolled plates ranging from 1.2 to 25.4mm. The mechanical properties of hot-rolled steel plates are far inferior to those of cold-rolled plates, but they have very good toughness and ductility. Due to a certain degree of work hardening and low toughness, cold-rolled steel plates can achieve a relatively good yield-to-strength ratio and are more suitable for cold-bent spring sheets and other parts. At the same time, because the yield point is closer to the tensile strength, the process of use There is no foreseeability of dangers, and accidents may easily occur when the load exceeds the allowable load.
