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| 热处理对吸铸TiAl基合金铸件组织的影响 | |
| 引用本文： | 叶喜葱,苏彦庆,郭景杰,张丽红,郝志江.热处理对吸铸TiAl基合金铸件组织的影响[J].材料热处理学报,2012,33(1):132-135. |
| 作者姓名： | 叶喜葱 苏彦庆 郭景杰 张丽红 郝志江 |
| 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,黑龙江哈尔滨,150001 3. 三峡大学医学院,湖北宜昌,443002 4. 机械工业第六设计研究院,河南郑州,450007 |
| 基金项目： | 三峡大学科研启动基金(0620100021) |
| 摘 要： | 利用金属型底浇式真空吸铸技术和添加合金元素获得TiAl基合金薄板,观察并研究薄板热处理前后的组织。结果表明,在金属型强制冷却和添加合金元素的共同作用下,利用金属型底浇式真空吸铸技术获得的TiAl基合金薄板件铸态组织细小、致密。其中Ti-47Al-5Nb-0.5Si和Ti-47Al-2W-0.5Si合金的铸态平均晶粒多在20μm左右,但是,铸态组织的片层组织不均匀,且在组织内部存在较大的偏析。将试样加热到1300℃,保温5 h,随炉冷却热处理后,TiAl基合金薄板的铸态组织有所长大,但是片层更加平整稳定,偏析也明显得到改善。 |
| 关 键 词： | TiAl基合金 底浇式 真空吸铸 微观组织 热处理 |
Effect of heat treatment on microstructure of TiAl based alloy casting by suction casting process |
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| YE Xi-cong,SU Yan-qing,GUO Jing-jie,ZHANG Li-hong,HAO Zhi-jiang.Effect of heat treatment on microstructure of TiAl based alloy casting by suction casting process[J].Transactions of Materials and Heat Treatment,2012,33(1):132-135. | |
| Authors: | YE Xi-cong SU Yan-qing GUO Jing-jie ZHANG Li-hong HAO Zhi-jiang |
| Affiliation: | 1.College of Mechanical and Material,China Three Gorges University,Yichang 443002,China; 2.School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China; 3.Medical Science College,China Three Gorges University,Yichang 443002,China; 4.No.6 Institute of Project Planning and Research of Machinery Industry,Zhengzhou 450007,China) |
| Abstract: | TiAl based alloy sheet with fine grain size and fully lamellar microstructure was prepared by permanent mold vacuum suction casting technique,and the microstructure of the alloy sheet before and after heat treatment was examined.The results indicate that because of forced cooling and addition of alloy element,grain size of as-cast Ti-47Al-5Nb-0.5Si and Ti-47Al-2W-0.5Si alloys are about 20 μm with uneven lamellar microstructure,and there is serious segregation observed in the alloys.After heat treatment,the microstructure of the TiAl based alloys are coarsened,but the segregation is improved and the lamellar becomes smooth and stable. |
| Keywords: | TiA1 based alloy bottom pouring suction casting microstructure heat treatment |
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