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Cr、V对多组元Ti-Al合金组织的影响
Effect of Cr and V on Microstructure of Multicomponent Ti-Al Alloy
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- DOI:
- 作者:
- 王艳晶 李昊 徐再东 胡秋野 杨文峰 巩校良
WANG Yanjing;LI Hao;XU Zaidong;HU Qiuye;YANG Wenfeng;GONG Xiaoliang
- 作者单位:
- 沈阳航空航天大学材料科学与工程学院
School of Materials Science and Engineering,Shenyang Aerospace University,Shenyang 110122,China
- 关键词:
- 合金化 晶粒细化 片层团组织 热处理
alloying grain refinement lamellar microstructure heat treatment
- 摘要:
- 通过向Ti-44Al-4Nb-1Mo-0.1B合金分别添加Cr、V,研究合金化元素和热处理对合金组织的影响。结果表明,Ti-44Al-4Nb-1Mo-0.1B合金铸态组织由(α_2+γ)片层团、钼化物和B_2相构成;加入Cr或V后,形成Cr B相和Ti0.925V0.075相,片层组织得到细化;随着Cr或V的增多,B2相也增多,细化程度增强。热处理后Ti-44Al-4Nb-1Mo-0.1B合金为双态组织,Ti-44Al-4Nb-1Mo-0.1B-1Cr合金为全片层组织,Ti-44Al-4Nb-1Mo-0.1B-1V合金为近片层组织。Cr对α相转变温度的降低程度强于V。Effects of alloying elements and heat treatment on microstructure of Ti-44Al-4Nb-1Mo-0.1B alloy were studied by adding Cr and V, respectively. The results show that the microstructure of as-cast Ti-44Al-4Nb-1Mo-0.1B alloy is composed of(α2+γ) lamellar groups, molybdate and B2 phases. After Cr or V is added, Cr B phase and Ti0.925V0.075 phase are formed, and the laminar structure is refined. After heat treatment, Ti-44Al-4Nb-1Mo-0.1B alloy is a two-state structure,Ti-44Al-4Nb-1Mo-0.1B-1Cr alloy is a whole lamellar structure, and Ti-44Al-4Nb-1Mo-0.1B-1V alloy is a near-lamellar structure. The reduction of Cr to alpha phase transition temperature is stronger than that of V.