| TiAl合金的热加工、组织和性能 |
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| 引用本文： | 陈玉勇,杨非,孔凡涛,肖树龙.TiAl合金的热加工、组织和性能[J].稀有金属快报,2010(3):12-17. |
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| 作者姓名： | 陈玉勇 杨非 孔凡涛 肖树龙 |
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| 作者单位： | 哈尔滨工业大学材料科学与工程学院; |
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| 基金项目： | 国家自然科学基金资助项目(50274035,50674037) |
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| 摘 要： | 采用水冷铜坩埚感应熔炼技术制备了高质量的Ti-43Al-9V-0．3Y合金铸锭，该合金铸态组织为近层片组织结构，层片团簇的体积分数为85％左右，大小约为80μm，块状卢和γ相位于层片团簇边界。层片结构中除了γ和α2相外，还存在少量的口相析出物。Ti-43Al-9V-0．3Y合金具有良好的热加工性能，通过包套锻造和包套轧制技术，成功制备了大尺寸TiAl合金锻饼和国内最大尺寸TiAl合金板材，其尺寸分别为犯60mm×24mm和500mm×300mm。经热变形后，Ti-43Al-9V-0．3Y合金的显微组织明显细化，力学性能得到了显著提高。
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| 关 键 词： | TiAl合金 加工 组织 性能 |
Processing,Microstructure and Properties of Ti-43Al-9V-0.3Y Alloy |
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| CHEN Yuyong,YANG Fei,KONG Fantao,XIAO Shulong.Processing,Microstructure and Properties of Ti-43Al-9V-0.3Y Alloy[J].Rare Metals Letters,2010(3):12-17. |
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| Authors: | CHEN Yuyong YANG Fei KONG Fantao XIAO Shulong |
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| Affiliation: | CHEN Yuyong,YANG Fei,KONG Fantao,XIAO Shulong(School of Materials Science , Engineering,Harbin Institute of Technology,Harbin 150001,China) |
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| Abstract: | A high quality TiAI alloy ingot with a nominal composition of Ti-43Al-9V-0. 3Y （at. % ） was prepared using water cooled Introduction Skull Melting. The microstrueture of as-east Ti-43Al-9V-0. 3Y alloy was nearly fully lamellar structure with the lamellar volume fraction of 85% and a mean lamellar size of 80 μm. It was apparent that bulk/3 and γ phases were located at the lamellar colony boundaries and some/3 phase existed at lamellar structure besides T and α2 phases. The Ti-43Al-9V-0. 3Y alloy exhibited excellent hot deformability, and large pancake and the largest sheet of TiAl alloy in China, with size of Ф260 mm × 24 mm and 500 mm× 300 mm, respectively, were successfully prepared through pack forging and rolling. After hot deformation, the microstructure of TiAl alloy was refined obviously and the mechanical properties were improved promptly. |
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| Keywords: | TiAl alloy processing microstructure properties |
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