烧结温度及Y_2O_3对9Cr-RAFM钢性能的影响  

Effects of Y_2O_3 addition and sintering temperature on mechanical properties of 9Cr-RAFM steel

作　　者：黄玉柱[1] 熊惟皓[1] 蔺绍江[1,2] 

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 [2]黄石理工学院机电工程学院,黄石435003

出　　处：《粉末冶金材料科学与工程》2012年第1期95-101,共7页Materials Science and Engineering of Powder Metallurgy

基　　金：国家重点基础研究发展规划(973计划)资助项目(2010GB109000)

摘　　要：采用粉末冶金技术,以球磨-模压-真空烧结工艺制备2种9Cr-RAFM钢:以0.3%Y2O3(质量分数)为弥散相的ODS 9Cr铁基高温合金和不添加Y2O3的Non-ODS 9Cr铁基高温合金。研究烧结温度及Y2O3对RAFM钢的力学性能和微观组织的影响。研究结果表明:采用球磨-模压-真空烧结工艺制备的ODS合金的综合力学性能高于Non-ODS合金,并且在1 390℃烧结,保温2 h条件下制备的ODS合金具有最佳的综合力学性能(抗拉强度600 MPa,伸长率23.1%)。并对不同球磨时间的合金粉末进行XRD物相分析,用SEM及能谱分析技术研究Y2O3影响RAFM钢的微观组织成分和力学性能的机理。Two kinds of 9Cr-RAFM steels were prepared by powder metallurgy（PM）： ODS 9Cr iron-based super alloy with w（Y2O3） of 0.3% as dispersion phase and Non-ODS 9Cr iron-based super alloy with no Y2O3 addition.Effects of Y2O3 addition and sintering temperature on mechanical properties and microstructure of the RAFM steel were studied.Results revealed that mechanical properties of ODS samples were better than that of Non-ODS samples prepared under the same sintering temperature,and ODS samples sintered at 1 390 ℃ for 2 h exhibited optimal mechanical properties（tensile strength was 600 MPa and elongation was 23.1%）.Phase analysis of alloy powder prepared with different ball milling time was determined by XRD.Mechanism of Y2O3 addition on the microstructure and mechanical properties of RAFM steel were also studied through SEM/EDX analytical technology.

关 键 词：9Cr-RAFM钢 烧结温度 Y2O3添加 

分 类 号：TG142.1[一般工业技术—材料科学与工程]