纳米CeO2对激光熔覆Fe/Cr3C2复合涂层组织与磨损性能的影响*

doi:10.11896/j.issn.1005-023X.2017.022.013

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Abstract The effects of 1% nano-CeO₂ doping to the organizational structure and wear resistance of Fe/Cr₃C₂ composite coatings formed by using laser cladding on low-carbon steel surface has been researched in this paper with the aid of SEM, EDS, XRD, micro-hardness tester and sliding wearing test. Experimental results demonstrated that compound phases such as α-Fe, γ-Fe, Cr₃C₂, Cr23C6, Cr7C3, etc. are the main constituent phases of Fe+Cr₃C₂+1%CeO₂ composite coatings. Composite coatings’ micro-structures were refined obviously after adding 1% nano-CeO₂, and the quantities of non-cladding Cr₃C₂ reduced significantly, as well as the primary carbides transformed from coarse rod to block with risen quantity and uniform distribution, which effectively restrained and eliminated crack formation. The hardnesses and wear resistances of the Fe+Cr₃C₂+1%CeO₂composite coatings were improved significantly, and in particular, the cross-sectional micro-hardness of Fe+30%Cr₃C₂+1%CeO₂ coating was 105HV higher than that of Fe+30% Cr₃C₂ coating (increased by 15.4%). Meanwhile, the hardness distribution homogeneities of the doped coatings along depth direction gets improved apparently.

Key words： nano-CeO₂ laser cladding Fe-based alloy coating Cr₃C₂ composite coating microstructure wear resistance

Published: 08 May 2018

CLC number:

TG444.1

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	Articles by authors
	XIAO Yi
	GU Jianfeng
	ZHANG Junxi
	YANG Youli

Cite this article:

XIAO Yi,GU Jianfeng,ZHANG Junxi, et al. Effects of Nano-CeO₂ Doping on Microstructure and Wear Performance of Laser clad Fe/Cr₃C₂Alloy Composite Coating[J]. Materials Reports, 2017, 31(22): 65-69.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.022.013 OR http://www.mater-rep.com/EN/Y2017/V31/I22/65

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