合金元素对Ti-Mo合金的相结构和力学性能的影响  

Effect of Alloying Elements on Phase Structure and Mechanical Properties of Ti-Mo Alloys

作　　者：顾苏怡[1] 周正存[1] 敖培 GU Suyi;ZHOU Zhengcun;AO Pei(Suzhou Vocational University,Suzhou Jiangsu 215104,China;Shanghai Jinyuan Senior High School,Shanghai 200333,China)

机构地区：[1]苏州市职业大学,江苏苏州215104 [2]晋元高级中学,上海200333

出　　处：《上海金属》2022年第2期38-41,共4页Shanghai Metals

基　　金：中国江苏高等教育处自然科学基金(19KJD470005);苏州重点工业技术创新项目(SYG201939);苏州农业科技创新项目(SNG2020055)。

摘　　要：采用真空电弧熔炼工艺制备了含Fe、Nb、Al和Sn的Ti-12Mo合金铸锭,并对其进行了950℃保温30 min炉冷和水冷的热处理。研究了化学成分和热处理对Ti-12Mo合金相结构和力学性能的影响。结果表明:Ti-12Mo合金中加入Al、Sn元素能起稳定α相的作用,加入Fe元素能起稳定β相的作用,加入Sn元素则阻碍β→ω相变并降低β相的转变温度,从而增加了合金中β相的体积分数。从950℃水冷的Ti-12Mo合金组织为α″相和β_(M)相,其超弹性应变较好、杨氏模量较小。随着α″相数量的增多,Ti-12Mo基合金的杨氏模量减小而超弹性应变增大。The Ti-12Mo alloy ingots having iron,niobium,aluminum and tin were fabricated by a vacuum arc melting process,and were heat treated by holding at 950℃for 30 min followed by cooling in furnace and in water.The effect of the chemical composition and the heat treatment on phase structure and mechanical properties of the Ti-12Mo alloys was investigated.The result showed that the addition of aluminum and tin to the Ti-12Mo alloy acted as stabilizingαphase,the addition of iron was likely to renderβ-phase stable,and the addition of tin obstructed the transformation ofβ-phase toωphase and decreased the transition temperature ofβ-phase,thus increasing volume fraction ofβ-phase in the Ti-12Mo alloy.The Ti-12Mo alloys water-cooled from 950℃exhibited microstructure consisting ofα″phase and β_(M) phase,better superelastic strain and smaller Young’s modulus.The Ti-12Mobase alloys decreased in Young’s modulus and increased in superelastic strain with the increase in the amount ofα″phase.

关 键 词：钛合金 相结构 力学性能 

分 类 号：TG146.412[一般工业技术—材料科学与工程]