Shenzhen Su's heat treatment processing that Cr20 heat treatment process
1: Cr20 cast iron thermal test index of the processing parameters in orthogonal test is the most important to the hardness, tempering temperature, then holding time for quenching, RE heat preservation time for quenching temperature and tempering.
2: at the same time, heat treatment process after casting can keep the impact toughness is basically unchanged effectively enhance the Cr20 hardness of the iron, experiments the hardness reached more than 57.5HRC. Optimal scheme of heat 960 ℃× 2.5h air quenched +450 ℃× 3.5H tempering treatment can obtain the highest hardness of 61.6HRC, the impact toughness of 2.31J/ cm 2, composition microstructure consists of hard shaped eutectic carbides and martensite matrix.
Shenzhen Su's heat treatment processing factory has been chasing the processing technology of heat treatment, welcome to the industry colleagues to come to discuss, developed a heat treatment process of optimal heat treatment, will carry forward the cause of.