Hot-rolled plates that have not been opened in kaiping machine are called hot-rolled plates.

Hot rolled coil is made of slab (mainly continuous casting slab) as raw material and heated by roughing mill and finishing mill to make strip steel. The hot strip from the last finishing mill is cooled to the set temperature by laminar flow, and then rolled into a strip coil by a coiler, and the cooled strip coil.

Hot rolled steel plate products are widely used in shipbuilding, automobile, road and bridge, construction, machinery, pressure vessels, household appliances, hardware, furniture and other manufacturing industries because of their excellent properties such as high strength, good toughness, easy processing and molding, and good weldability.

Extended data

After hot rolling or forging, steel is delivered directly without special heat treatment, which is called hot rolling or hot forging state. The termination temperature of hot rolling (forging) is generally 800 ~ 900℃, and then it is naturally cooled in air, so the hot rolling (forging) state is equivalent to normalizing treatment.

The difference is that the final temperature of hot rolling (forging) is high or low, which is not as strict as normalizing heating and temperature control, so the microstructure and properties of steel fluctuate more than normalizing.

Many iron and steel enterprises adopt controlled rolling. Due to the strict control of finishing rolling temperature and forced cooling measures after finishing rolling, the grain size of steel is refined, and the delivered steel has high comprehensive mechanical properties.

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