TiAl预合金粉末表征及后续热压烧结组织特点

doi:10.13228/j.boyuan.issn1006-6543.20170083

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Abstract The TiAl-based pre-alloy powder prepared by gas atomization process and its vacuum hot pressing microstructure were studied by laser particle size analyzer， metallographic microscope and scanning electron microscope （SEM）. The results show that the pre-alloyed powder particles prepared by gas atomization process are fine and have good sphericity. The particle size is mainly distributed in the range of 20.0-40.0 μm. The powder particles with different size have different surface and internal morphology. The interior and surface of the small size powder show no histological features. With the further increase of the powder particle size， the surface and internal structure of the powder gradually change from the cellular dendrite to the dendrites. After vacuum hot-pressing， the dense and uniform microstructure is obtained and the internal microstructure is duplex.

Key words： TiAl based alloy gas atomized powder hot-pressing sintering microstructure morphology

Received: 16 June 2017 Published: 27 February 2018

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	Articles by authors
	KANG Fu-Wei
	WANG Shan-Shan
	SUN Jian-Fei

Cite this article:

KANG Fu-Wei,WANG Shan-Shan,SUN Jian-Fei. Characterization of pre-alloyed TiAl powder and its microstructure characteristics after hot-pressing[J]. , 2018, 28(01): 38-44.

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http://edit.chinamet.cn/Jweb_fmyjgy/EN/10.13228/j.boyuan.issn1006-6543.20170083 OR http://edit.chinamet.cn/Jweb_fmyjgy/EN/Y2018/V28/I01/38

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