75Si2Mn1.5CrB等温淬火工艺及性能研究  

Study on Austempering Process and Mechanical Properties of 75Si2Mn1.5CrB Steel

作　　者：石雪雁 陈雪娇 逯迪 刘耀东[1] 

机构地区：[1]长春工业大学材料科学与工程学院,吉林长春130012 [2]鞍山经济开发区管理委员会,辽宁鞍山114000

出　　处：《热加工工艺》2016年第2期190-192,共3页Hot Working Technology

摘　　要：研究了新型的高碳合金75Si2Mn1.5CrB在250℃等温淬火工艺下的组织和力学性能。结果表明,75Si2Mn1.5CrB铸钢经920℃奥氏体化后进行250℃保温不同时间的淬火处理后,组织均为带有奥氏体薄膜的贝氏体铁素体+马氏体+残余奥氏体。75Si2Mn1.5CrB经250℃保温1 h处理,其硬度和耐磨性最佳。Microstructure and mechanical properties of 75Si2Mn1.5CrB carbon alloy after 250 ℃ isothermal quenching were studied. The results show that microstructure of bainite-ferrite with the films of austenite, martensite and retained austenite of 75Si2Mn1.5CrB steel can be formed by austenitizating at 920 ℃ and then austempering at 250 ℃ for different holding time. When the 75Si2Mn1.5CrB steel is holded for 1 h, the comprehensive mechanical properties are preferable.

关 键 词：高硅高碳合金钢 低温贝氏体 等温淬火 组织 力学性能 

分 类 号：TG156.3[金属学及工艺—热处理]