ECAP变形对0Cr17Ni4Cu4Nb不锈钢组织与力学性能的影响  

Effect of ECAP deformation on microstructure and mechanical properties of 0Cr17Ni4Cu4Nb stainless steel

作　　者：王剑星 杨钢[3] 张忠模 赵彦 唐光明 魏小明 WANG Jian-xing;YANG Gang;ZHANG Zhong-mo;ZHAO Yan;TANG Guang-ming;WEI Xiao-ming(Chongqing Materials Research Institute Co. , Ltd. , Chongqing 400707, China;National Instrument Functional Materials Engineering Technology Research Center, Chongqing 400707, China;Institute for Special Steel, Central Iron and Steel Research Institute, Beijing 100081, China)

机构地区：[1]重庆材料研究院有限公司,重庆400707 [2]国家仪表功能材料工程技术研究中心,重庆400707 [3]钢铁研究总院特殊钢研究所,北京100081

出　　处：《塑性工程学报》2018年第1期119-124,共6页Journal of Plasticity Engineering

基　　金：2015年工业转型升级强基工程项目(TC150B5C0/20)

摘　　要：采用等径转角挤压（Equal Channel Angle Pressing,ECAP）工艺在室温下对0Cr17Ni4Cu4Nb不锈钢进行单道次冷变形。通过力学性能测试、光学显微镜和透射电镜观察、X-射线衍射和差热分析等方法,研究了ECAP变形对0Cr17Ni4Cu4Nb不锈钢组织与力学性能的影响。结果表明：通过ECAP变形,组织内的板条马氏体受到了大剪切力的作用,扭曲变形并被拉长,且变形有利于过时效时马氏体组织的分解;ECAP变形使大部分区域的马氏体板条碎化,但碎化不均匀,未完全碎化的板条发生了细化;ECAP变形促进了组织内奥氏体的形成,且变形有利于组织回复和促进相析出。ECAP变形使合金强度大幅提高,但塑性下降,均匀塑性变形能力变差。0Cr17Ni4Cu4Nb stainless steel was cold deformed with single channel by equal channel angle pressing（ ECAP） process at room temperature. The effect of ECAP deformation on microstructure and mechanical properties of 0Cr17Ni4Cu4Nb stainless steel was studied by methods of mechanical properties test,optical microscope,transmission electron microscope,X-ray diffraction and differential thermal analysis. The results show that the lath martensite in the organization suffered large shear force is distorted and elongated by the ECAP deformation,and it is beneficial to martensite decomposition in overaging; martensite lath in most of the area is fragmented by ECAP deformation,but uneven fragmented; the formation of austenite in organization is promoted by ECAP deformation,which is benefit to organizations recovery and the phase precipitation. The strength of alloy is improved significantly,but the plastic is dropped,homoyeneous plastic deformation ability becomes poor with ECAP deformation.

关 键 词：等径转角挤压 0Cr17Ni4Cu4Nb不锈钢 马氏体 力学性能 

分 类 号：TG142.24[一般工业技术—材料科学与工程]