钽添加量对氧化物弥散强化低活化铁素体马氏体钢组织和力学性能的影响  

Effects of Ta Adding Contents on Microstructure and Mechanical Properties of 9Cr-ODS RAFM Steel

作　　者：蒋有芳[1] 熊惟皓[1] 姚振华[1] 李映波[1] 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,武汉430074

出　　处：《机械工程材料》2013年第11期96-100,共5页Materials For Mechanical Engineering

基　　金：国家重点基础研究发展计划项目(2010GB10900)

摘　　要：采用粉末冶金法制备了不同钽添加量的氧化物弥散强化低活化铁素体马氏体钢,研究了钽添加量对该钢组织与力学性能的影响。结果表明:该钢的力学性能随着钽添加量的增多先升高后下降;当钽的添加量为0.18%时,晶粒细小均匀,在晶粒内有大量二次细小的TaC粒子弥散均匀析出,合金的力学性能最优,室温抗拉强度和伸长率分别为632MPa和24.2%,300℃下的抗拉强度和伸长率分别为557MPa和23.1%。9Cr-ODS/RAFM steels （oxide dispersion strengthen reduced activation ferritic/martensitic steel） were prepared by powder metallurgy method, and the effects of Ta adding contents on microstructure and mechanical properties of the steel were studied. The results show that the mechanical properties of the steel increased at first and then decreased with the increase of Ta adding content. When Ta adding content was 0. 18wt%, the grains were fine and uniform, and a large amount of secondary precipitations of fine TaC particles distributed in grains homogeneously, and the steel exhibited optimal mechanical properties, the tensile strength and the elongation were 632 MPa and 24. 2% at room temperature, and were 557 MPa and 23. 1% at 300 ℃, respectively.

关 键 词：氧化物弥散强化低活化铁素体马氏体钢 钽 组织 力学性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]