亚温淬火对25MnV钢显微组织和力学性能的影响  

Effect of Sub-temperature Quenching on Microstructure and Mechanical Properties of 25MnV Steel

作　　者：李安铭[1] 王海瑞[1] 

机构地区：[1]河南理工大学材料科学与工程学院,焦作454000

出　　处：《机械工程材料》2009年第12期36-38,共3页Materials For Mechanical Engineering

基　　金：河南省自然科学基金资助项目(0511052600)

摘　　要：采用正交组合回归设计试验方法研究了不同温度亚温淬火对25MnV钢抗拉强度和硬度的影响,分析了该钢亚温淬火后的组织。结果表明:25MnV钢经亚温淬火后,得到极细的板条状马氏体组织;830℃淬火时,马氏体板条之间分布着条状的铁素体;在810～830℃温度范围内,随淬火温度升高,该钢的强度和硬度升高,830℃亚温淬火的强度、硬度最好。The effect of sub-temperature quenching at different temperature on the tensile strength and hardness of 25MnV steal was investigated by orthogonal regressive principle. The mierostrueture of the steel after sub-temperature quenching was analyzed. The results indicate that the very fine lath martensite of 25MnV steel was obtained by sub-temperature quenching. The strip ferrite was distributed between martensite laths as the steel quenched at 830℃. In the temperature range of 810 to 830 ℃, the strength and hardness of the steel were increased along with the increasing of the quenching temperature. The best tensile strength and hardness could obtain in 25MnV steel when sub-temperature quenched at 830 ℃.

关 键 词：25MNV钢 亚温淬火 抗拉强度 显微组织 

分 类 号：TG156[金属学及工艺—热处理]