放电等离子烧结K403镍基高温合金渗铝层的制备及性能

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Abstract According to the effect of electric field on atomic diffusion, combined with the advantages of pulse plasma sintering which rapid temperature rise and high cooling rate can be achieved to realize rapidly aluminizing of nickel base alloy. In this paper, the effect of aluminizing temperature on aluminized process of K403 nickel-based superalloy and the high temperature oxidation resistance and wear properties of the Ni-based superalloy were studied. The results show that the aluminized coating with a thickness of about 109 μm is obtained through aluminized at 900 ℃ for 30 min, which belongs to low temperature and high activity aluminizing. The thickness of aluminized layer at 1 000 ℃ is about 89 μm, which belongs to aluminizing at high temperature and low activity. After 1 000 ℃ oxidation, the mass gain from 2.5 mg/cm²of untreated nickel-based superalloy decreases to 1.3 mg/cm² of the aluminized nickel-base superalloy, reduced by 48%. Meanwhile, the friction coefficient decreases by 50% from 1.2 to 0.6. The volume wear rate decreases from 4.08% to 0.392%, reduced by 90.4%.

Key words： nickel base superalloy pack cementation spark plasma sintering friction wear high temperature oxidation resistance

Received: 28 October 2018 Published: 12 July 2019

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TF124.212

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	Articles by authors
	JIANG Jun
	LI Ruidi
	YUAN Tiechui
	WANG Yue
	WANG Minbo

Cite this article:

JIANG Jun,LI Ruidi,YUAN Tiechui, et al. Fabrication and performance of aluminized coating on K403 Ni-based superalloy sintered by spark plasma sintering[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(2): 154-160.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2019/V24/I2/154

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