Seamless steel pipe hot rolling and cold rolling (dial) seamless steel tube General steel pipe

Seamless steel pipe hot rolling and cold rolling (dial) seamless steel tube General steel pipe, hot-rolled seamless steel tube points lower intermediate pressure boiler pipe, high pressure boiler tube alloy steel pipe stainless steel pipe of oil cracking geological steel pipe and other steel pipe cold-rolling (dial) steel pipe generally low intermediate pressure boiler steel pipe seamless steel pipe in addition to the points of high pressure boiler steel alloy steel pipe stainless steel pipe Petroleum cracking pipe other steel pipe, also includes carbon thin wall steel pipe alloy thin wall steel pipe stainless thin wall steel pipe shaped steel pipe Hot rolled seamless tube outer diameter is generally greater than 32mm, wall thickness 2.5-75mm, cold rolled seamless steel tube outer diameter can be 6mm, wall thickness can be 0.25mm, thin wall tube outer diameter can be 5mm wall thickness is less than 0.25mm, cold rolled than hot rolled size accuracy is high general seamless steel tube is used 10# 20# 30# 35# 45# and other high-quality carbon bonded steel 16Mn 5MnV and other low alloy structural steel or 40Cr 30CrMnSi 45Mn2 40MnB and other bonded steel hot rolled or cold rolled 10# 20# and other low carbon steel seamless pipe is mainly used for fluid transport pipeline 45 40Cr and other seamless steel pipe made of carbon steel to manufacture mechanical parts, such as the stress parts of the car tractor generally use seamless steel pipe to ensure the strength and flattening test hot rolled steel pipe to hot rolled state or heat treatment state delivery; As the name implies, the temperature of the rolled parts is high, so the deformation resistance is small, and large deformation can be achieved. Taking the rolling of steel plate as an example, the thickness of the continuous casting billet is about 230mm, and after rough rolling and finishing rolling, the final thickness is 1~20mm At the same time, because the thickness ratio of the steel plate is small, the size accuracy is relatively low, it is not easy to appear the shape problem, to control the convex for the organization of the requirements, generally through the control of rolling and cooling to achieve, that is, to control the finishing rolling rolling temperature and rolling temperature to control the microstructure and mechanical properties of strip steel