The heat treatment of 15CrMo seamless steel pipe is one of important process in manufacturing process. Compared with other processes, the heat treatment generally does not change the shape and chemical compositions of 15CrMo seamless steel pipe. It changes the chemical composition of the surface of 15CrMo seamless steel pipe, to improve the performance of the workpiece. In order to make the 15CrMo seamless steel pipe has the required mechanical properties, physical properties and chemical properties, heat treatment is necessary besides selecting reasonable materials and a variety of forming process.

Steel is the most widely used material in the mechanical industry. In the 1960s, the heat treatment takes advantage of plasma field which make 15CrMo seamless steel pipe obtain new technology for surface heat treatment and chemical heat treatment. Heat treatment can control the microstructure of steel, therefore, heat treatment is important for 15CrMo seamless steel pipe.