hot rolling
Thread Content
According to GB713-2008 Steel Plates for Boilers and Pressure Vessels, the supply conditions for steel plates include hot rolling (controlled rolling) and normalizing. Question: 1. Is hot rolling a production method or a heat treatment condition? I checked the different types of heat treatment, and there’s nothing called hot rolling. There are normalizing, tempering, annealing, and quenching. 2. What is controlled rolling?
Hot rolling is a method for producing steel (tubes), which involves drawing and rolling; it is further divided into hot drawing, cold drawing, hot rolling, and cold rolling. There is no heat treatment condition called hot rolling. I remember discussions on controlled rolling in the forum; the original poster can search for it. However, controlled rolling is hardly mentioned in modern container manufacturing. Personally, I think controlled rolling is a forming method that results in lower mechanical properties compared to hot rolling, which is why it’s not used much. I’m not sure if this assumption is correct
Hot rolling is the most fundamental process in steel plate production; after being cast from molten steel into ingots, the steel is finally transformed into sheets through hot rolling.
So if the steel plate is supplied in the normalized state, is it first hot-rolled and then subjected to normalization?
Hot rolling is a production method, while heat treatment is the responsibility of equipment manufacturers.