变钒含量钛铝基合金组织和性能研究  

Study on Microstructure and Properties of Titanium-Aluminum-based Alloy with Variable Vanadium Content

作　　者：胡秋野 王艳晶 李昊 徐再东 袁晨航 HU Qiuye;WANG Yanjing;LI Hao;XU Zaidong;YUAN Chenhang(School of Material Science and Engineering,Shenyang Aerospace University,Shenyang 110136,China)

机构地区：[1]沈阳航空航天大学材料科学与工程学院,辽宁沈阳110136

出　　处：《热加工工艺》2021年第6期59-61,66,共4页Hot Working Technology

基　　金：国家自然科学基金资助项目(51601121)。

摘　　要：设计了三种钛铝基合金,名义成分为Ti-44Al-4Nb-1Mo-0.1B (1#),Ti-44Al-4Nb-1Mo-0.1B-1V (2#)和Ti-44Al-4Nb-1Mo-0.1B-3V(3#),通过控制钒的含量来研究合金的微观组织及其性能。利用光学显微镜(OM)及扫描电子显微镜(SEM)观察并分析合金的组织转变,进行了抗氧化性能和硬度测试。结果表明:合金铸态下的组织主要由α2+γ片层和少量B2相组成,B2相的数量随V的加入而增多。合金的抗氧化性随V的加入急剧降低;铸态下,硬度随V含量的增加先降低后增大,热处理后的硬度随V含量增加而逐渐增大。Three kinds of titanium-aluminum-based alloys were designed,and the nominal composition is Ti-44Al-4Nb-1Mo-0.1B (1#),Ti-44Al-4Nb-1Mo-0.1B-1V (2#) and Ti-44Al-4Nb-1Mo-0.1B-3V (3#).The microstructure and properties of the alloy were studied by controlling the content of vanadium.The microstructure transformation of the alloy was observed and analyzed by optical microscope (OM) and scanning electron microscope (SEM).The antioxidant property and hardness were tested.The results show that the microstructure of the alloy is mainly composed of α2+γ lamellar and a small amount of B2 phase,and the number of B2 phase increases with the addition of V.The oxidation resistance of the alloy decreases sharply with the addition of V,and the hardness decreases first and then increases with the increase of V content in the as-cast state,and the hardness increases gradually with the increase of V content after heat treatment.

关 键 词：钛铝基合金 B2相 抗氧化性 

分 类 号：TG146.23[一般工业技术—材料科学与工程]