启闭机活塞杆表面高焓等离子喷涂Cr2O3·5SiO2·3TiO2/CoNiCrAlY梯度陶瓷涂层性能

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Abstract In order to solve the problem of the wear of the piston rod of the gate hoist during the Cao’e river sluice, the high-enthalpy plasma spraying technology was used to prepare a gradient ceramic coating with a bonding layer of CoNiCrAlY and a surface layer of Cr₂O₃·5SiO₂·3TiO₂. The microstructure, microhardness, porosity, bonding strength, impact toughness, and wear resistance of the CoNiCrAlY/Cr₂O₃·5SiO₂·3TiO₂coating were characterized and analyzed, and the wear mechanism of the ceramic coating was also analyzed. The results show that the average porosity of the coating is about 0.52%, the average microhardness is about 1 334.6 HV_0.2, the average bonding strength is 61.7 MPa, and the friction and wear resistance is about 87.4 times that of the base 45^# steel. The Cr₂O₃·5SiO₂·3TiO₂coating has excellent anti-wear properties. The wear mechanism of Cr₂O₃·5SiO₂·3TiO₂coating is abrasive wear, fracture and peeling. The CoNiCrAlY/Cr₂O₃·5SiO₂·3TiO₂coating has achieved good application effects on the piston rod of the gate hoist of Cao’e River.

Key words： Cao'e River piston rod of gate hoist high-enthalpy plasma spraying CoNiCrAlY Cr₂O₃·5SiO₂·3TiO₂

Received: 06 April 2021 Published: 10 November 2021

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TG174.4

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	Articles by authors
	CHENG Xinchuang
	FU Li
	CHEN Xiaoming
	ZHAO Jian
	MAO Pengzhan
	LIU Wei
	ZHANG Lei

Cite this article:

CHENG Xinchuang,FU Li,CHEN Xiaoming, et al. Property of high-enthalpy plasma spraying Cr₂O₃·5SiO₂·3TiO₂/CoNiCrAlY gradient ceramic coating on the surface of the piston rod of the gate hoist[J]. Materials Science and Engineering of Powder Metallurgy, 2021, 26(5): 436-441.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2021/V26/I5/436

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