The heat treatment of steel (pipe) is a process method to change the internal structure of steel (pipe) by heating, heat preservation and cooling the steel in solid state, so as to obtain the required performance. Usually, according to the purpose requirements, the heat treatment process of steel can be divided into: annealing, quenching + tempering, quenching and tempering, and surface treatment.
Through heat treatment, the potential of steel (pipe) can be fully utilized, the performance of workpiece (steel pipe) can be improved, the weight of workpiece (steel pipe) can be reduced, materials can be saved, costs can be reduced, and service life can be extended. On the other hand, the heat treatment process can also improve the processing performance, improve the processing quality and reduce tool wear. At the same time, some physical and chemical indicators must be obtained through heat treatment. Such as: high resistance to H2S stress corrosion performance, strengthening of stainless steel pipes, etc.
The internal structure of metals and alloys is changed by heating, heat preservation and cooling to obtain the structure required for the performance of the workpiece. This technology is called heat treatment process. The same material can obtain different properties after different heat treatments. The change in performance is due to the change in structure. Therefore, understanding the changes in the structure of steel during heat treatment is the basis for correct heat treatment.
Pressure steel pipe
