Research on Microstructure and Properties of 9SiCr Steel After Vacuum Heat Treatment
After 9SiCr steel was quenched by vacuum heat treatment and ordinary heat treatment,the surface quality,deformation,metallographic structure,impact toughness,fracture scanning and wear resistance were measured.The results show that the part surface,deformation,hardness and mechanical properties of 9SiCr steel by vacuum heat treatment are better than the ordinary heat treatment.The metallographic analysis results show that the tempered martensite and carbonization distribution of the sample by vacuum heat treatment are more uniform and smaller than ordinary heat treatment,the fracture scanning of the sample after vacuum heat treatment is more intensive than ordinary heat treatment,and the impact toughness of 9SiCr steel by vacuum heat treatment improves markedly.