40Cr钢表面高焓等离子喷涂Cr<sub>2</sub>O<sub>3</sub>涂层的性能

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Abstract The Cr₂O₃ coatings were sprayed by SQC-100 high enthalpy plasma spray on the surface of 40Cr steel for piston rod of hoist. The microstructure, micro-hardness, porosity, bonding strength, anti-wear performance and electrochemical performance were characterized. The results show that, the porosity of Cr₂O₃ coating obtained by high enthalpy plasma spraying is 0.81%, the average microhardness (HV_0.2) is 1 310.3, and the average bonding strength is 60.6 MPa. Friction and wear experiment show that, the mass loss of the Cr₂O₃coating is only 0.001 3 g, the mass loss of the 40Cr steel is 0.101 8 g. The anti-wear property of the coating is 78 times to the stainless steel matrix. The wear mechanism of Cr₂O₃coating is abrasive wear and adhesive wear. The Cr₂O₃ coating has stronger electrochemical corrosion resistance than the matrix. The Cr₂O₃ coatings sprayed by plasma have a good application prospect.

Key words： high enthalpy plasma spray 40Cr Steel Cr₂O₃coating abrasive wear adhesive wear

Received: 09 August 2017 Published: 12 July 2019

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	FANG Yong
	FU Li
	CHEN Xiaoming
	LIU Wei
	ZHAO Jian
	MENG Jinbo

Cite this article:

FANG Yong,FU Li,CHEN Xiaoming, et al. Properties of Cr₂O₃ coating sprayed by high enthalpy plasma on 40Cr Steel[J]. Materials Science and Engineering of Powder Metallurgy, 2018, 23(2): 217-221.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2018/V23/I2/217

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