CrNi3MoVA钢表面电火花沉积W-Ni-Fe-Co涂层的摩擦磨损性能<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.012.008

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Abstract In order to further expand the route to harden gun bore, a W-Ni-Fe-Co alloy, prepared by powder metallurgy technology, was used as electrode to electrospark deposit on a CrNi3MoVA steel substrate. Meanwhile, a hard chromium coating was also plated on a CrNi3MoVA steel substrate for comparison. The performance of friction and wear of both coatings was tested by nanoindentor and friction and wear testing machine. Moreover, the phases, morphology and compositions of the deposited and worn coatings were analyzed by XRD, SEM and EDS. The results showed that the W-Ni-Fe-Co coating is composed of α-W distributed as bright band, γ-Fe and NiWO₄. The hardness of the W-Ni-Fe-Co coating reduced 18% than that of the hard chromium coating whilst the elasticity modulus increased 4%. The wear mechanism of the W-Ni-Fe-Co coating is characterized as slight adherent wear while that of the hard chromium coating is severe one. In contrast to the hard chromium coating, the W-Ni-Fe-Co coating electrospark deposited on the CrNi3MoVA steel has an obvious function of antifriction and wear resistance, and what′s more, the friction coefficient is reducing with the increase of the friction velocity due to the enhancement effect of oxide self-lubricating with the aggravation of the worn surface.

Key words： CrNi3MoVA steel W-Ni-Fe-Co coating electroplated hard chromium coating electrospark deposition friction and wear

Published: 25 June 2017 Online: 2018-05-08

CLC number:	TB304
	TB35

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	Articles by authors
	YANG Junbao
	GUO Qiuping
	ZHAO Boyuan
	JIN Hao
	GUO Ce’an
	ZHANG Jian

Cite this article:

YANG Junbao,GUO Qiuping,ZHAO Boyuan, et al. Friction and Wear Performance of W-Ni-Fe-Co Coating Electrospark Deposited on CrNi3MoVA Steel[J]. Materials Reports, 2017, 31(12): 35-38.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.012.008 OR https://www.mater-rep.com/EN/Y2017/V31/I12/35

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