Why do cold-drawn seamless tubes need heat treatment?
Cold drawn seamless pipes refer to steel pipes with high dimensional accuracy and good surface finish used in mechanical structures and hydraulic equipment. Heat treatment is an essential process in its production process, this is why? The function of heat treatment of cold drawn seamless pipes is to improve the mechanical properties of steel pipes and precision steel pipes, eliminate residual stress and improve the machining performance of steel pipe metals. According to the different purposes of heat treatment, the heat treatment process of cold drawn seamless pipes can be divided into two categories: preliminary heat treatment and final heat treatment. The purpose of preparatory heat treatment is to improve the processability of the steel pipe, eliminate internal stress and prepare a good metallographic structure for the final heat treatment. The heat treatment process includes annealing, normalizing, aging, quenching and tempering, etc. The purpose of the final heat treatment ...