一种改善大尺寸车轴强韧性的工艺研究  

Process Research on Improving Strength and Toughness of Larger Size Axle Steel

作　　者：杨明[1,2] 梁益龙[1,2] 

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550025 [2]贵州省材料结构与强度重点实验室,贵州贵阳550025

出　　处：《热加工工艺》2013年第24期196-198,共3页Hot Working Technology

基　　金：黔科合重大专项(字(2006)6029)

摘　　要：探索了热处理工艺对EA4T车轴钢组织与性能的影响规律,通过显微组织、断口形貌以及TEM观察,探讨了残余奥氏体的形貌和分布规律,分析了车轴材料失效的原因与机理。结果表明:通过提高淬火温度,其塑性虽然略有降低,但车轴钢的抗拉强度和韧性得以提高。The effects of heat treatment on microstructure and mechanical properties of EA4T axle steel were investigated.The morphology and distribution of retained-austenite were analyzed by the microstructure,fracture morphology and TEM.The failure reason and mechanism of axle steel were discussed.The results indicate that the strength and toughness of axle steel increase with a little decrease of ductility by elevating quenching temperature.

关 键 词：奥氏体晶粒 马氏体 强韧性 EA4T 车轴钢 

分 类 号：TG156.3[金属学及工艺—热处理]