Microstructure of Rings After Cold Ring Rolling and Its Mechanical Property After Quenching and Tempering
By comparing the microstructures of rings before and after deformation and measuring the values of microhardness after heat treatment,the effects of cold ring rolling deformation on microstructure of rings and its mechanical property after quenching and tempering were discussed.The carbide particles in the structure of ring are found smaller and more even in the process of cold rolling,and so the general mechanical property improves after heat treatment.The analysis shows that the process of cold rolling mainly influences the velocity of carbides dissolution during the period of quenching and tempering and leads to different proportion of martensite between deformed and undeformed structure.The changing trend of microhardness exactly presents the distinction.