Study on Heat Treatment Process of Modified Cr12MoV Die Steel
The microstructure and properties of modified Cr12MoV die steel after different heat treatment processes were studied.The results show that,after heat treatment,the eutectic carbides of modified Cr12MoV die steel are changed into nodular and dispersed ones in the matrix.As quenching temperature increasing,the hardness falls first and then increases,the impact toughness rises gradually.The hardness of quenched samples falls with tempering temperature rising;the impact toughness increases first and falls later.The optical heat treatment process of modified Cr12MoV die steel is quenching at 1080℃ and tempering at 250℃.