Study on Sub-temperature Quenching Technique of 27SiMn Steel
The process of the 820 ℃ sub-temperature quenching and high temperature tempering for 27SiMn steel was studied,and the microstructure and mechanical properties of the steels after heat treatment were analyzed.The results show that the mechanical properties of 27SiMn steel quenched at 820 ℃ sub-temperature and tempered at high temperature can reach conventional quenching and tempering treatment level and satisfy performance requirements of hydraulic props cylinder.The lower energy consumption and longer service life of the heating furnace can be achieved by this process.Thus this process has certain value for application.