What's the difference between cold rolling and hot rolling?

Literally speaking, cold rolling and hot rolling are mainly the difference of rolling temperature. Hot rolling means that steel bars or ingots work at a certain temperature and are rolled many times by a rolling mill to become the final product. And cold rolling means that the steel bar is rolled directly with a rolling mill without heating, and the target finished product can also be achieved. The steel rolled by large domestic steel mills such as Angang and Baosteel are all hot rolled, and the rolling mill equipment produced by some machinery factories in Gongyi belongs to cold rolling mills. Huarui Heavy Industry Machinery Manufacturing Co., Ltd. is a professional enterprise specializing in the production of cold rolling mills and cold rolling double-ribbed equipment.