Seamless Processing Details Of Gas LSAW Steel Pipes

In the process of processing Gas LSAW Steel Pipes, many steps are taken to obtain pipes of such high quality. The metallurgical structure can be obtained by eliminating the hardening of seamless steel tubes. The process equipment is a bright annealing furnace, which is mainly used for The stainless steel finished product is heat treated under a protective atmosphere. When the application performance requirements of seamless steel pipes are different, the requirements for the metallographic structure after bright annealing are different, so the process of bright heat treatment will be different.

After cold working, residual stress is left in the GR B ERW CS Pipes material, and the residual stress is very unfavorable to the stress corrosion cracking of the pipe. Any degree of cold working will result in a significant increase in the resistance to stress corrosion cracking of the material. The degree of cold working also has an adverse effect on the high temperature endurance of austenitic stainless steel. The higher the general working temperature or the higher the fracture life requirement, the lower the degree of cold working.

From the above introduction, it can be known that the heat treatment process of the seamless steel pipe is rather cumbersome, and in order to obtain a qualified metallographic structure, the adjustment section of the cooling section of the bright annealing furnace is required to be large. Therefore, the current advanced bright annealing furnaces often use strong convection cooling in their cooling sections, and three cooling sections are provided, which can individually adjust the air volume. It is divided into three sections along the width direction of the strip, and the cooling rate in the width direction of the strip is adjusted by the air flow guiding to control the plate shape.