为开发960MPa级工程机械用Q960钢板,研究确定了其调质热处理工艺。结果表明：其最佳的淬火工艺为900℃保温20min,最佳的回火工艺为600℃保温40min;经最佳调质热处理后试验钢的组织为回火索氏体,屈服强度为1 030 MPa,抗拉强度为1 080 MPa,伸长率为16.8%,-40℃冲击功达144J,满足GB/T 16270-2009的要求。
To develop Q960 steel plates used for engineering machinery,heat treatment technologyies of quenching and tempering was studies.The results show that the optimum quenching technology was heating at 900 ℃ for 20 min,and the optimum tempering technology was heating at 600 ℃ for 40 min.The microstructure of tested steel was temper sorbit after optimum quenching and tempering heat treatment,and yield strength,tensile strength,elongation and impact energy at-40 ℃ respectively was 1 030 MPa,16.8% and 144 J,they could meet the acquirement of GB/T 16270-2009.
参考文献
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