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| 真空吸铸TiAl基合金组织研究 | |
| 引用本文： | 叶喜葱,苏彦庆,郭景杰,张丽红.真空吸铸TiAl基合金组织研究[J].航空材料学报,2012,32(4):15-19. |
| 作者姓名： | 叶喜葱 苏彦庆 郭景杰 张丽红 |
| 作者单位： | 1. 三峡大学机械与材料学院,湖北宜昌,443002 2. 哈尔滨工业大学材料科学与工程学院,哈尔滨,150001 3. 三峡大学医学院,湖北宜昌,443002 |
| 摘 要： | 利用金属型真空吸铸技术获得了TiAl基合金薄板件,并研究了该铸件的铸态组织以及合金元素对其组织的影响。实验结果表明:由于金属型的强制冷却作用,金属型真空吸铸的Ti-47Al合金薄板铸件铸态组织细小,平均晶粒尺寸在60μm左右;W元素的添加有利于B2相的形成,从而细化组织,其机理是B2相阻碍了α晶粒长大;Si元素添加生成的Ti5Si3相,主要分布在晶界处,形成的Ti5Si3第二相质点会阻碍TiAl基合金凝固过程中组织的长大,有利于细化TiAl基合金组织。 |
| 关 键 词： | 真空吸铸 金属型 TiAl基合金 合金元素 |
Structure of TiAl Based Alloy by Suction Casting |
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| YE Xi-cong , SU Yan-qing , GUO Jing-jie , ZHANG Li-hong.Structure of TiAl Based Alloy by Suction Casting[J].Journal of Aeronautical Materials,2012,32(4):15-19. | |
| Authors: | YE Xi-cong SU Yan-qing GUO Jing-jie ZHANG Li-hong |
| Institution: | 1.College of Mechanical & Material,China Three Gorges University,Yichang 443002,Hubei China;2.School of Materials Science & Engineering,Harbin Institute of Technology,Harbin 150001,China;3.Medical Science College,China Three Gorges University,Yichang 443002,Hubei China) |
| Abstract: | The TiAl based alloy sheets were achieved by the permanent mould suction casting.This as-cast structures and the effect of alloy elements on structures were studied.The results indicated that because of force cooling,the as-cast structures of TiAl based alloy sheet by permanent suction casting are fine,and the average grain size is 60 μm.The B2 phase counteracts α phase grow,and the adding of W element benefits to form B2 phase.Therefore,the addition of W element can refine the grain size of TiAl based alloy structure.The Ti5Si3 phase formed by adding of Si element is mainly situated at the grain boundary.The particle of the Ti5Si3 phase counteracts the structure grow on solidification process,so the adding of Si element can refine the grain size of TiAl based alloy structure. |
| Keywords: | suction casting permanent mold TiAl based alloy alloy element |
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