氧化物弥散增强低活化铁素体/马氏体9Cr钢的显微组织与拉伸性能  

Microstructure and Tensile Properties of 9Cr-ODS RAFM Steel

作　　者：周敏[1] 熊惟皓[1] 姚振华[1] 彭倩筠[1] 黄玉柱[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》2011年第8期62-65,共4页Materials For Mechanical Engineering

基　　金：聚变堆面向等离子体材料的基础研究项目(2010GB109000);国家自然科学基金重点资助项目(50634060)

摘　　要：采用粉末冶金法制备了核聚变反应堆第一壁候选结构材料——氧化物弥散强化低活化9Cr钢,采用XRD、OM、SEM、EDS等对合金化之后的粉体及烧结体的组织进行了分析,讨论了球料比对粉体特性以及烧结温度对烧结体组织与抗拉强度的影响。结果表明:球料比为20:1、球磨48 h的粉体颗粒呈片层状,尺寸较均匀,合金化效果较好;烧结温度在1300～1390℃范围内,随着温度的提高,烧结体的孔隙率降低,组织更加均匀,抗拉强度由376.0MPa逐渐增大到562.9MPa,伸长率同步增大,最大为20.2%。The method of powder metallurgy was used to prepare nuclear fusion reactor first-wall structural materials 9Cr-ODS RAFM steel, the microstructure of powders after alloying and sintered specimen was analyzed by using XRD, OM, SEM and EDS, and the effects of ratio of grinding media to material on powders characteristics and sintering temperature on the microstructure and tensile strength of sintered bodies were discussed. The results show that the alloying was better and the powders presented flake and uniform size when the ratio of grinding media to material was 20 ： 1 and hall-milling time was 48 h. When the sintering temperature was 1 300- 1 390℃, the porosity of sintered bodies decreased, microstructure was more uniform, tensile stren, gth increased gradually from 376. 0 MPa to 562. 9 MPa and the elongation increased in step with tensile strength, its maximum was 20. 2%.

关 键 词：氧化物弥散增强低活化铁素体/马氏体9Cr钢 机械合金化 烧结温度 抗拉强度 

分 类 号：TF121[冶金工程—粉末冶金]