热处理对针阀体用4Cr5MoSiV1钢组织及性能的影响  

Effect of heat treatment on microstructure and properties of 4Cr5MoSiV1 steel for needle valve body

作　　者：韩俊刚 邵志文[1] 宋运坤[1] 陈小虎 丁博远 顾娇娇 Han Jungang;Shao Zhiwen;Song Yunkun;Chen Xiaohu;Ding Boyuan;Gu Jiaojiao(Ningbo Branch of Chinese Academy of Ordnance Science,Ningbo Zhejiang 315103,China;China North Engine Research Institute,Tianjin 300412,China)

机构地区：[1]中国兵器科学研究院宁波分院,浙江宁波315103 [2]中国北方发动机研究所,天津300412

出　　处：《金属热处理》2022年第7期120-124,共5页Heat Treatment of Metals

基　　金：宁波市科技创新2025重大专项(20191ZDYF020115,2019B10086);宁波市自然科学基金(202003N4341)。

摘　　要：对4Cr5MoSiV1钢分别进行了淬火+低温回火和淬火+中温回火热处理,分析了两种典型热处理工艺对针阀体用4Cr5MoSiV1钢的显微组织、维氏硬度和力学性能的影响。结果表明,随着回火温度的升高,针阀体材料组织由回火马氏体转变为回火托氏体,维氏硬度由639.4 HV0.1降低至584.4 HV0.1,而抗拉强度、屈服强度和伸长率则分别提高了12.7%、12.8%和26.6%。Quenching+low temperatural tempering and quenching+medium temperature tempering were applied to the 4 Cr5 MoSiV1 steel,and the effect of the two typical heat treatment processes on microstructure,Vickers hardness and mechanical properties was analyzed.The results show that with the increase of tempering temperature,the microstructure of the needle valve body changes from tempered martensite to tempered troosite.Meanwhile,the Vickers hardness decreases from 639.4 HV0.1 to 584.4 HV0.1,while the tensile strength,yield strength and elongation increase by 12.7%,12.8%and 26.6%,respectively.

关 键 词：针阀体用钢 4CR5MOSIV1钢 热处理工艺 显微组织 力学性能 

分 类 号：TG162[金属学及工艺—热处理]