热处理对β锻造Ti-22Al—25Nb合金组织和性能的影响  

Effects of heat treatment on microstructure and properties of β-forged Ti-22Al-25Nb alloy

作　　者：梁晓波[1] 程云君[1] 张建伟[1] 李世琼[1] 

机构地区：[1]钢铁研究总院,北京100081

出　　处：《中国有色金属学报》2010年第B10期336-341,共6页The Chinese Journal of Nonferrous Metals

摘　　要：研究了β锻造的Ti-22Al-25Nb合金在固溶+时效热处理过程中微观组织的转变规律,并对不同固溶温度+800℃时效处理合金的室温和650℃拉伸性能进行了测试和分析。结果表明:合金经β锻造后的组织由少量α_2颗粒、大量O相板条和B2相基体组成。在固溶处理过程中,组织中的O相板条发生溶解,数量减少,形状变短、变粗。在980℃以上固溶处理时,基体B2相发生明显的再结晶。固溶+时效处理后,细小的二次O相板条再次从B2基体中析出,并最终形成一种具有短棒状或颗粒状的初生α_2/O相+细小的二次O相板条+B2相基体组成的组织。随着微观组织中初生α_2/O相数量的减少、二次O相板条数量增加,合金室温和650℃抗拉强度升高,伸长率降低。The research and application progress of Ti3Al and Ti2AlNb based alloys in Central Iron and Steel Research Ins.titute （CISRI） were summarized. A family of Ti3Al and Ti2AlNb based alloys with independent intellectual property fights was established in CISRI by alloying and designing on microstructure systematically. The comprehensive of mechanical properties of the alloys reaches the internatinnal advanced level. The manufacture processing of the alloys relying on the domestic equipments was built up and the ability to supply small-batch production was formed. The application research of the alloys on aerospcace and aeronautics service is going well. Some components are applied in some important weapon program.

关 键 词：TI3AL合金 Ti2AlNb合金 合金化 制备技术 应用 

分 类 号：TF804.3[冶金工程—有色金属冶金]