烧结温度与时效工艺对Cu@Fe复合粉末制备Cu-Fe合金组织与性能的影响

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Abstract 50Cu@50Fe composite powder was prepared by electroless copper plating, and then the coated composite powder was compression molded and sintered in a hydrogen atmosphere at 850-1 050 ℃ to prepare 50Cu-50Fe alloy, and then the alloy was subjected to cold rolling deformation, solid solution and aging heat treatment. The effects of sintering temperature, aging temperature and aging time on the structures, tensile strength and electrical conductivity of 50Cu-50Fe alloy were studied. The results show that after sintering at 1 050 ℃ for 1 h, the relative density of the 50Cu-50Fe alloy reaches 95.5% and the tensile strength is 392 MPa. The sintered 50Cu-50Fe alloy after deformation and solid solving, the relative density increases to 99.4%, the tensile strength is 422 MPa, and the electrical conductivity is 18.11 IACS%. After aging at 450 ℃ for 4 h, a large number of dispersed spherical Fe-rich phase particles precipitate in the Cu matrix, the tensile strength reaches 492 MPa, and the electrical conductivity is 39.11 IACS%. When the ageing temperature is higher than 450 ℃, the Fe-rich phase particles aggregate and grow at the grain boundaries of the Cu matrix, resulting in a decrease in the mechanical properties of the 50Cu-50Fe alloy. After aging at 550 ℃ for 4 h, the tensile strength of the 50Cu-50Fe alloy is 422 MPa, and the electrical conductivity is 45.22 IACS%.

Key words： electroless copper plating 50Cu-50Fe alloy solution and aging treatment tensile strength electrical conductivity

Received: 05 March 2021 Published: 26 September 2021

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	MAO Mincong
	GAN Xueping
	ZHOU Kechao
	ZHAO Qi
	ZHU Fan

Cite this article:

MAO Mincong,GAN Xueping,ZHOU Kechao, et al. Effects of sintering temperature and aging process on microstructure and properties of Cu-Fe alloy prepared by Cu@Fe composite powder[J]. Materials Science and Engineering of Powder Metallurgy, 2021, 26(4): 363-371.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2021/V26/I4/363

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