Cr<sub>3</sub>C<sub>2</sub>对45钢表面超音速火焰喷涂制备的Ni基合金涂层热态抗磨损性能的影响

doi:10.11896/j.issn.1005-023X.2018.06.009

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Abstract Ni-based alloy coatings with different Cr₃C₂ content were prepared on the 45 steel substrate by using JP8000 type high velocity oxygen fuel (HVOF) spraying equipment.The microstructure of the coatings was analyzed by means of metallographic microscopy, XRD, SEM and EDS, and its hardness was also measured. The friction and wear tests were carried out by CFT-type material surface performance tester. The friction coefficient and wear rate of the coatings were measured at 50 ℃, 100 ℃, 150 ℃, 200 ℃, 250 ℃ and 300 ℃ respectively.The results showed that the friction coefficient and wear rate of Ni based alloy coating decreased with the increase of temperature due to the formation of oxide films when the temperature was below 250 ℃. If the temperature reached 250 ℃ and above, it produced serious adhesive wear, and the wear performance decreases. When a certain amount of Cr₃C₂ was added to the nickel base alloy, it could produce Cr₇C₃, CrB and other hard phases, which played a strengthening role on the coating and caused wear resistance improvement of the coating in hot state. When the content of Cr₃C₂ was about 37.5%, the comprehensive properties of the coating were excellent.

Key words： chromium carbide nickel-based alloy coating hot wear high velocity oxygen fuel spraying

Published: 25 March 2018

CLC number:

TG178

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	Articles by authors
	SU Yixiang
	ZHANG Zhijian
	QIU Xiaolai
	LIU Jiefang
	SHEN Nan
	LIU Shiduo

Cite this article:

SU Yixiang,ZHANG Zhijian,QIU Xiaolai, et al. Effect of Cr₃C₂ Addition on Thermal Wear Resistant Performance of High Velocity Oxygen Fuel Sprayed Nickel-based Alloy Coating on 45 Steel Substrate[J]. Materials Reports, 2018, 32(6): 899-904.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.06.009 OR http://www.mater-rep.com/EN/Y2018/V32/I6/899

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