2010•Heat treatment of metalsRequires access
Effect of heat treatment on microstructure and properties of low alloy high speed steel
Luo Xiang-yan
Open publisher page 0 citations
Abstract
The effect of quenching and tempering temperature on the microstructure and mechanical properties of HJ low alloy high speed steel was studied.The results show that the austenite grain size and the mechanical properties of the steel are sensitive to quenching temperature.The austenite grains are fine and uniform when the steel is quenched at 1160 ℃,leading to good comprehensive properties of the steel.Mixed grains appear when the quenching temperature exceeds 1170 ℃ and the grains become full coarse at 1210 ℃,which result in the drastic decrease of toughness of the steel.The secondary hardening effect of HJ high speed steel is obvious,and the peak of secondary hardness of the steel is at about 540 ℃.