| 热压烧结制备钛基合金TiAl+Ti及其显微结构 |
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| 引用本文： | 于秋颖,方爽,熊华平,肇恒跃,张敏聪,王淑云.热压烧结制备钛基合金TiAl+Ti及其显微结构[J].稀有金属材料与工程,2017,46(5):1370-1374. |
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| 作者姓名： | 于秋颖 方爽 熊华平 肇恒跃 张敏聪 王淑云 |
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| 作者单位： | 北京航空材料研究院 焊接与塑性成形研究所,北京航空材料研究院 焊接与塑性成形研究所,北京航空材料研究院 焊接与塑性成形研究所,沈阳飞机工业集团有限公司,北京航空材料研究院 焊接与塑性成形研究所,北京航空材料研究院 焊接与塑性成形研究所 |
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| 基金项目： | 航空科学基金(2014ZF21010) |
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| 摘 要： | 在1473 K,30 MPa,1.5 h的热压条件下直接烧结TiAl金属间化合物和Ti混合粉末,制备了钛基合金(TiAl+Ti)样品,采用XRD、SEM研究了2种不同成分配比对烧结产物相组成及显微结构的影响。结果表明,不同成分配比热压烧结体的显微组织分布相差较大,但相组成基本相同;对于TiAl和Ti体积比7:3的钛基合金样品,Ti粉末中Fe元素易于固溶到Ti_2Al和Ti_3Al中,析出相主要由TiAl、Ti_2Al(Fe)、Ti_3Al(Fe)和富Ti相组成;该比例的混合粉末在热压烧结过程中发生了不同程度的扩散反应,最终形成了组织渐变的Ti/Ti_3Al(Fe)//Ti_2Al(Fe)/TiAl显微结构。
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| 关 键 词： | TiAl金属间化合物 钛基合金 热压烧结 扩散反应 显微结构 |
| 收稿时间： | 2016/5/12 0:00:00 |
| 修稿时间： | 2016/7/5 0:00:00 |
Preparation and Microstructure Characterization of Ti-based Alloy (TiAl + Ti)by Hot-pressed Sintering |
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| YU Qiu-ying,FANG Shuang,XIONG Hua-ping,ZHAO Heng-yue,ZHANG Min-cong and WANG Shu-yun.Preparation and Microstructure Characterization of Ti-based Alloy (TiAl + Ti)by Hot-pressed Sintering[J].Rare Metal Materials and Engineering,2017,46(5):1370-1374. |
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| Authors: | YU Qiu-ying FANG Shuang XIONG Hua-ping ZHAO Heng-yue ZHANG Min-cong and WANG Shu-yun |
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| Affiliation: | Laboratory of Welding and Forging,Beijing Institute of Aeronautical Materials,Laboratory of Welding and Forging,Beijing Institute of Aeronautical Materials,Laboratory of Welding and Forging,Beijing Institute of Aeronautical Materials,Shenyang Aircraft Corporation,Laboratory of Welding and Forging,Beijing Institute of Aeronautical Materials,Laboratory of Welding and Forging,Beijing Institute of Aeronautical Materials |
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| Abstract: | Fabrication of TiAl strengthened Ti-based alloy by hot-pressed sintering of mixed powders of TiAl and Ti was studied at 1473 K under a pressure of 30 MPa for 1.5 h. The effects of composition ratio on the phase constitute and microstructures of hot-pressed sintering products were subsequently analyzed by XRD and SEM. Large difference exists in the phase distribution for the sintering products with different composition rations occurred. The feasibility of TiAl reinforced Ti-based alloy was confirmed with TiAl/Ti volume ratio of 7:3. Element Fe was examined to be concentrated in Ti2Al and Ti3Al. TiAl, Ti2Al(Fe), Ti3Al(Fe) and Ti-based phases were mainly formed in the sintering product. Different types of diffusion reactions occurred within the sintered body during hot-pressed sintering, finally leading to the formation of fine graded microstructures, Ti/Ti3Al(Fe)//Ti2Al(Fe)/TiAl. |
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| Keywords: | TiAl intermetallic titanium based alloy hot-press sintering diffusion reaction microstructure |
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