热等静压对ODS-12Cr铁基合金性能的影响  

Effects of HIP on properties of ODS-12Cr ferritic steel

作　　者：姚振华[1] 熊惟皓[1] 陈肖[1] 黄斌[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,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2013年第10期79-82,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家高技术研究发展计划资助项目(2010GB109000)

摘　　要：通过机械合金化和真空烧结工艺制备了Fe-Cr-W-Ti-Y2O3合金,并研究了热等静压对该合金组织及性能的影响.研究结果表明:球磨48h后,元素混合粉末能实现完全合金化;热等静压能有效降低烧结体的孔隙率,使第二相与基体间界面更加圆滑,降低应力从而提高了合金的强度,其中1 380℃烧结体在热等静压处理前后的拉伸强度分别为521.4MPa和1 054MPa.合金中存在纳米级的Ti-Y-O复杂化合物.Fe-Cr-W-Ti-Y203 alloy was fabricated by mechanically alloying and vacuum sintering. Effects of hot isostatic pressing （HIP） on microstructure and properties of the alloy were investiga- ted. The results show that the element powders are completely alloyed after 48 h milling, and treatment of HIP can positively decrease the porosities and made the interfaces between the second phase and matrix smoother, which increases the tensile strength of alloy. Tensile strength of alloy sintered at 1 380 ℃ is 521.4 MPa, while that of the alloy after HIP treating is elevated to 1 054 MPa. Nano Ti Y-O precipitation is also observed in the alloy.

关 键 词：机械合金化 铁素体合金 拉伸强度 氧化物弥散强化 相对密度 热等静压 

分 类 号：TF123[冶金工程—粉末冶金]