回火温度对淬火态40CrNiMoA钢组织与力学性能的影响  

Effects of Tempering Temperature on Microstructure and Mechanical Properties of Quenched 40CrNiMoA Steel

作　　者：支龙[1] 陈红斌 袁满[1] 周茜 张博[1] 贾超龙 张敏涛[1] ZHI Long;CHEN Hongbin;YUAN Man;ZHOU Qian;ZHANG Bo;JIA Chaolong;ZHANG Mintao(CSIC NO.12 Research Institute,Xingping 713102,China;Guotou Hami Power Generation Co.,Ltd.,Hami 839000,China)

机构地区：[1]中国船舶重工集团公司第十二研究所,陕西兴平713102 [2]国投哈密发电有限公司,新疆哈密839000

出　　处：《热加工工艺》2018年第18期200-202,共3页Hot Working Technology

摘　　要：通过显微组织观察,拉伸性能、硬度、冲击性能的测定和冲击断口分析,研究了不同回火温度对淬火态40CrNiMoA钢显微组织及力学性能的影响。结果表明：随着回火温度的提高,40CrNiMoA钢显微组织中粗大板条马氏体逐渐分解的同时碳化物集聚并长大,组织由最初淬火态的马氏体逐渐转变为回火索氏体;40CrNiMoA钢的强度、硬度呈下降趋势,塑性和韧性呈上升趋势。The effects of tempering temperature on the microstructure and mechanical properties of quenched 40 CrNiMoA steel were studied by means of microstructure observation, tensile property, hardness, impact property measurement and impact fracture analysis. The results show that, with the increase of tempering temperature, the coarse lath martensite in the microstructure of 40 CrNiMoA steel is gradually decomposed and the carbide accumulates and grows, which changes from quenched martensite to tempered sorbite. And the strength and hardness of 40 CrNiMoA steel decrease, and the ductility and toughness increase.

关 键 词：40CRNIMOA钢 回火温度 显微组织 力学性能 

分 类 号：TG156.6[金属学及工艺—热处理] TG161[金属学及工艺—金属学]