150 mm超厚水电站用钢07MnCrMoVR的组织性能  

Microstructure and properties of 150 mm ultra-heavy 07MnCrMoVR hydropower steel

作　　者：冯路路 胡锋[1] 乔文玮 鲁修宇 张国宏[5] FENG Lu-lu;HU Feng;QIAO Wen-wei;LU Xiu-yu;ZHANG Guo-hong(The State Key Laboratory for Refractories and Metallurgy,Collaborative Innovation Center for Advanced Steels,International Research Institute for Steel Technology,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;School of Mechanical Engineering,Jing Chu University of Technology,Jingmen 448000,Hubei,China;Jiangsu Huaneng Cable Co.,Ltd.,Gaoyou 225613,Jiangsu,China;Research Institute of Wuhan Iron and Steel Group,Wuhan 430080,Hubei,China;Analytical and Testing Centre,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China)

机构地区：[1]武汉科技大学耐火材料与冶金国家重点实验室,高性能钢铁材料及其应用省部共建协同创新中心,国际钢铁研究院,湖北武汉430081 [2]荆楚理工学院机械工程学院,湖北荆门448000 [3]江苏华能电缆股份有限公司,江苏高邮225613 [4]武汉钢铁(集团)研究院,湖北武汉430080 [5]武汉科技大学分析测试中心,湖北武汉430081

出　　处：《钢铁研究学报》2020年第5期400-405,共6页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(51601134);高压科学与先进超硬复合材料科研团队资助项目(TD201906)

摘　　要：对150 mm超厚07MnCrMoVR水电钢的组织性能进行了研究,采用光学显微镜、扫描电子显微镜对试验钢的微观形貌进行了观察,采用拉伸试验机和低温冲击韧性试验机对试验钢力学性能进行了检验。结果表明:试验钢经第一次完全淬火和第二次两相区亚温临界淬火后近表面组织转变为板条马氏体和未熔铁素体相间出现,厚度1/4处和厚度1/2处组织转变为贝氏体+铁素体组织,高温回火后近表面转变为回火索氏体组织,厚度1/4处和厚度1/2处组织转变为回火贝氏体+铁素体+大量碳化物。The production process of 150 mm ultra-thick 07 MnCrMoVR hydropower steel was studied, the microstructure morphology and mechanical properties of the tested steel were observed and tested by optical microscope, tensile testing machine and low temperature impact toughness testing machine. The results show that test steel after the first quenching, the surface obtain martensite, and the thickness of 1/4 and 1/2 obtain bainite, after the second intercritical quenching, the surface obtain martensite and ferrite, and the thickness of 1/4 and 1/2 obtain bainite and ferrite, after the high temperature tempering, the surface obtain tempered sorbite and ferrite, and the thickness of 1/4 and 1/2 obtain tempered bainite and ferrite, a large number of carbides precipitate on ferrite matrix and grain boundary.

关 键 词：超厚规格 07MnCrMoR 差温轧制 高温大压下 两相区淬火 碳化物 

分 类 号：TV732.4[水利工程—水利水电工程] TG142.1[一般工业技术—材料科学与工程]