热处理对低合金高速钢组织和性能的影响  

Effect of heat treatment on microstructure and properties of low alloy high speed steel

作　　者：秦宇飞[1] 刘剑[2] 罗湘燕[1] 

机构地区：[1]空军第一航空学院飞机战伤抢修技术研究所,河南信阳464000 [2]东南大学材料科学与工程学院,江苏南京211189

出　　处：《金属热处理》2010年第2期63-66,共4页Heat Treatment of Metals

基　　金：江苏省科技攻关项目(编号BE2006076)

摘　　要：研究了淬火及回火温度对HJ低合金高速钢组织和力学性能的影响。结果表明,HJ高速钢的奥氏体晶粒尺寸及力学性能对淬火温度很敏感。1160℃淬火时奥氏体晶粒细小均匀,综合性能良好;1170℃以上淬火时出现混晶,1210℃以上淬火时晶粒全面粗化,导致韧性显著降低。HJ高速钢回火二次硬化效果明显,二次硬化峰值温度为540℃左右。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 ℃.

关 键 词：热处理 低合金高速钢 奥氏体晶粒 硬度 冲击韧度 红硬性 二次硬化 

分 类 号：TG142.45[一般工业技术—材料科学与工程]