线圈扫描速度对感应熔覆NiCrBSi涂层组织与性能的影响

doi:10.11896/cldb.19020143

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Abstract NiCrBSi coating was prepared by melting the Ni60 powder on 45 steel substrate with induction cladding (IC) method.The influence of coil-scanning-speed on microstructures and properties of the coating was investigated by using SEM,XRD, microhardness tester and CETR tribometer. Results show that: the main phases of the coating are γ-Ni/Fe, Cr₇C₃, Cr₂₃C₆, CrB et al. As the coil scanning speed decreases, the size of the precipitated phase in the cladding layer becomes larger, the element diffusion increases, and the width of the diffusion transfer belt increases. The sectional hardness distribution decreases as the scanning speed decreases, and the maximum hardness of the cladding layer is 980HV_0.2. The residual stress inside the coating is compressive stress. As the scanning speed of the coil increases, the heat input of the coating decreases, the cooling and solidification speed of the molten pool increases. On the one hand, the diffusion of elements in the interface region is weakened, the dilution ratio of the coating decreases, and the width of the interface transition region decreases. On the other hand, the size of the layer grains and the precipitated phase are refined, the microhardness of the coating is increased, and the wear form of the coating is mainly changed from adhesive wear to abrasive wear, the residual compressive stress is increased, resulting in improved coating wear resistance.

Key words： induction cladding NiCrBSi coating coil-scanning-speed wear resistance

Published: 12 March 2020

CLC number:

TG174.44

Fund:This work was financially supported by the National Key R&D Program of China (2017YFB0310703, 2017YFF0207905).

About author:: Mengqing Zhangreceived his master of engineering degrees in Nov. 2014 from Army Acadamy of Armored Forces (AAAF). Since March 2015, he has studied for Ph.D. degree in Army Acadamy of Armored Forces (AAAF), focusing on the research of surface enginee-ring and tribology; Helong Yureceived his Ph.D. degree in materials from Army Acadamy of Armored Forces (AAAF) in 2016. He is currently an associate professor in Army Acadamy of Armored Forces (AAAF). His research interests are remanufacturing, surface engineering and military new materials.

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	ZHANG Mengqing
	QIAO Yulin
	JI Xiaochao
	ZHOU Kebing
	ZHANG Wei
	YU Helong

Cite this article:

ZHANG Mengqing,QIAO Yulin,JI Xiaochao, et al. Effect of Coil-scanning-speed on Microstructures and Properties of NiCrBSi Coating by Induction Cladding Method[J]. Materials Reports, 2020, 34(6): 6120-6125.

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http://www.mater-rep.com/EN/10.11896/cldb.19020143 OR http://www.mater-rep.com/EN/Y2020/V34/I6/6120

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