Most of the structural seamless steel pipes work under relatively large dynamic loads. They are subjected to tension, compression, bending, torsion or shearing. Some surfaces also have friction, requiring certain wear resistance and so on. In summary, parts operate under various compound stresses. Structural seamless steel pipes are mainly structural parts of various machines and mechanisms, such as shafts, connecting rods, studs, gears, etc., and are widely used in the manufacturing industries such as machine tools, automobiles and tractors. Especially for large parts in heavy machinery manufacturing, quenching and tempering treatment is used more. Therefore, the quenching and tempering treatment of structural seamless steel pipes occupies a very important position in heat treatment.
The quenched and tempered structural seamless steel pipe has good comprehensive mechanical properties and is widely used in various important structural parts, especially those connecting rods, bolts, gears and shafts that work under alternating loads. But the surface hardness is low and not wear-resistant. Quenching and tempering + surface quenching can be used to improve the surface hardness of parts.
Permanent Steel Manufacturing Co.,Ltd as a carbon steel tube supplier, has years of experience in manufacturing of carbon steel pipe, stainless steel tube, hollow section, pipe fittings. (Fluid Pipe/Boiler Tube/Fire Pipe/Line Pipe/Structure Tube)