N<sub>2</sub>气压对CrWN涂层结构及性能影响

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Abstract The CrWN coatings were prepared by arc ion plating. The effect of nitrogen pressure on the phase structure, morphorlogy, deposition rate, hardness and tribological properties of CrWN coating was investigated. The microstructures, morphology and elements of the CrWN coatings were studied by XRD, SEM and XPS, and hardness tester, friction-wear tester and profilometer were performed to measure their friction coefficient and wear rate. The results show that CrWN coatings is face-centered cubic structure. With the increasing of nitrogen pressure, the diffraction peak intensity of the (111) and (200) of the CrWN coatings has an obvious increase. The numbers and sizes of the large particles in coatings’ surface gradually decrease, and the highest deposition rate is 1.13 μm/h. When nitrogen pressure increases from 0.5 Pa to 1.0 Pa, the microhardness (HV) of CrWN coating increases from 1 900 to 2 010. With further increase of nitrogen pressure, the microhardness of CrWN coating decreases. With the increasing of nitrogen pressure, the average friction coefficient of CrWN coating maintains at 0.5, which is lower than the friction coefficient (0.7) of CrN coating. The wear rate of CrWN coating reaches a maximum of 5.4×10^-7mm³/(N∙m) at nitrogen pressure of 2.0 Pa, which is significantly lower than the wear rate (6.7×10^-7mm³/(N∙m)) of CrN coating.

Key words： arc ion plating CrWN coating nitrogen pressure hardness tribological properties

Received: 24 January 2021 Published: 21 July 2021

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TG174.444

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	HE Shibin
	LU Huihong
	TIAN Canxin
	LIU Yifei
	LI zhujun

Cite this article:

HE Shibin,LU Huihong,TIAN Canxin, et al. Influence of N₂pressure on the microstructure and properties of CrWN coatings[J]. Materials Science and Engineering of Powder Metallurgy, 2021, 26(3): 235-242.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2021/V26/I3/235

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