Cold-drawn seamless steel pipe annealing: refers to the heat treatment process of heating the metal material to an appropriate temperature, maintaining it for a certain period of time, and then slowly cooling it. Commonly used annealing processes include recrystallization annealing, stress relief annealing, spheroidizing annealing, and complete annealing. Main purpose: reduce the hardness of metal materials, increase plasticity, facilitate cutting or press working, reduce residual stress, improve the uniformity of structure and composition, or prepare structure for subsequent heat treatment, etc.
Cold-drawn seamless steel pipe tempering: refers to the heat treatment process in which the steel is hardened, heated to a temperature lower than Ac1, held for a certain period of time, and then cooled to room temperature. Commonly used tempering processes are: low temperature tempering, medium temperature tempering, high temperature tempering, multiple tempering, etc. The purpose of tempering is mainly to eliminate the stress generated by the steel during the quenching process, so that it has external high hardness and wear resistance, as well as required plasticity and toughness.
Post time: Jul-01-2022