What is the performance difference between hot rolled steel sheet and cold rolled steel sheet?

Hot rolled steel plate is heated by continuous casting plate or other raw materials, descaling under high pressure, entering roughing mill, cutting head and tail, and then entering finishing mill. After computer-controlled rolling, it passes laminar cooling and coiler coiling after finishing rolling. After cooling rate, it becomes straight coiling, producing general structural steel and welding structural steel.

The carbon content of hot-rolled steel plate is slightly higher than that of cold-rolled steel plate. It is rolled at high temperature and the composition difference will not be very large. All of them have the same density. The extensibility of hot-rolled steel plate is better, and the steel will also be under pressure. The hot-rolled steel can also be divided into structural steel, low-carbon steel, etc. according to their own situation, find the steel they need. The hardness of hot-rolled steel plate is not very high, and the processing starts It is easy to come here, with good ductility, relatively low strength and good plasticity. Generally, the width of the plate is of medium thickness, and the temperature of hot rolling is different from that of forging.

Cold rolled steel plate has high strength and low toughness after being rolled under normal temperature through certain processing, but it can have a better yield strength ratio, which is used to make the spring plate cool and bend and other more functions. Of course, if the yield point is closer to the tensile strength, the danger is unpredictable in use, and unnecessary danger may occur if it is used under overload, but it has high strength and hardness High, generally thin, can also be used as stamping plate.