2Al和Ti3Al中,析出相主要由TiAl、Ti2Al(Fe)、Ti3Al(Fe)和富Ti相組成；該比例的混合粉末在熱壓燒結(jié)過程中發(fā)生了不同程度的擴(kuò)散反應(yīng),最終形成了組織漸變的Ti/Ti3Al(Fe)//Ti2Al(Fe)/TiAl顯微結(jié)構(gòu)。"/>

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熱壓燒結(jié)制備鈦基合金(TiAl+Ti)及其顯微結(jié)構(gòu)
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北京航空材料研究院 焊接與塑性成形研究所,北京航空材料研究院 焊接與塑性成形研究所,北京航空材料研究院 焊接與塑性成形研究所,沈陽飛機(jī)工業(yè)集團(tuán)有限公司,北京航空材料研究院 焊接與塑性成形研究所,北京航空材料研究院 焊接與塑性成形研究所

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航空科學(xué)基金(2014ZF21010)


Preparation and Microstructure Characterization of Ti-based Alloy (TiAl + Ti)by Hot-pressed Sintering
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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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    摘要:

    在1473K,30MPa,1.5h的熱壓條件下直接燒結(jié)TiAl金屬間化合物和Ti混合粉末,制備了鈦基合金(TiAl+Ti)樣品,采用XRD、SEM研究了兩種不同成分配比對燒結(jié)產(chǎn)物相組成及顯微結(jié)構(gòu)的影響。結(jié)果表明,不同成分配比熱壓燒結(jié)體的顯微組織分布相差較大,但相組成基本相同；對于TiAl和Ti體積比7:3的鈦基合金樣品,Ti粉末中Fe元素易于固溶到Ti2Al和Ti3Al中,析出相主要由TiAl、Ti2Al(Fe)、Ti3Al(Fe)和富Ti相組成；該比例的混合粉末在熱壓燒結(jié)過程中發(fā)生了不同程度的擴(kuò)散反應(yīng),最終形成了組織漸變的Ti/Ti3Al(Fe)//Ti2Al(Fe)/TiAl顯微結(jié)構(gòu)。

    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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于秋穎,方爽,熊華平,肇恒躍,張敏聰,王淑云.熱壓燒結(jié)制備鈦基合金(TiAl+Ti)及其顯微結(jié)構(gòu)[J].稀有金屬材料與工程,2017,46(5):1370~1374.[YU Qiu-ying, FANG Shuang, XIONG Hua-ping, ZHAO Heng-yue, ZHANG Min-cong, 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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  • 收稿日期:2016-05-12
  • 最后修改日期:2016-07-05
  • 錄用日期:2016-08-18
  • 在線發(fā)布日期: 2017-09-27
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