热处理对铸态Ti48Al2Cr2Nb1B合金组织和性能的影响  

Effect of Heat Treatment on Microstructure and Mechanical Properties of Ti48Al2Cr2Nb1B Alloy

作　　者：焦勇 吴天栋 张利军 周中波 Jiao Yong;Wu Tiandong;Zhang Lijun;Zhou Zhongbo(Xi’an Super Crystal Science&Technology Development Co.,Ltd.,Xi’an 710200,China)

机构地区：[1]西安西工大超晶科技发展有限责任公司,陕西西安710200

出　　处：《钛工业进展》2018年第3期26-29,共4页Titanium Industry Progress

基　　金：陕西省重点研发计划项目(2017GY-119)

摘　　要：经真空自耗凝壳炉浇注得到Ti48Al2Cr2Nb1B合金试棒,通过显微组织观察和力学性能测试,研究了淬火及时效工艺对Ti48Al2Cr2Nb1B合金组织和性能的影响。结果表明,通过淬火+时效处理可以提高铸态Ti48Al2Cr2Nb1B合金的抗拉强度,但对其塑性的影响作用有限。经1 380℃×30 min/QC+1 240℃×6 h/AC处理后,Ti48Al2Cr2Nb1B合金可以获得均匀细小的双态组织,室温抗拉强度最高。Ti48Al2Cr2Nb1B alloy test bars were prepared by vacuum arc remelting furnace.The effects of quenching and aging on microstructure and mechanical properties of as-cast Ti48Al2Cr2Nb1B alloy were studied by metallographic observation and mechanics performance testing.The results show that the tensile strength can be increased by the method of quenching and aging,while the plasticity can hardly be increased.Meanwhile,the uniform and fine duplex microstructure can be obtained by 1 380℃×30 min/QC+1 240℃×6 h/AC,and the experimental sample after this heat treatment has the highest room temperature tensile strength.

关 键 词：Ti48Al2Cr2Nb1B合金 硼化物 层片组织 双态组织 

分 类 号：TG146.23[一般工业技术—材料科学与工程]