Study on Heat Treatment Process of Cu Alloy Die Steel

The heat treatment process of a new type of copper alloy die casting die steel was discussed.The effects of quenching temperature,tempering temperature and time on microstructure and mechanical properties of steel were studied.The results show that with quenching temperature increasing,the size of grain growes up,when quenching temperature is higher than 1100 ℃,the grain becomes bulky.At the quenching temperature of 1100 ℃,the hardness of steel is 63 HRC,and the room temperature tensile strength of steel is 1897 MPa.At 600 ℃,high temperature tensile strength is 1117 MPa.The best heat treatment process is:quenching at 1100 ℃ and then tempering at 500 ℃ for 5 h.