|Table of Contents|

Research on the Microstructure and Wear Properties ofIron-Based Composite Coating with WC(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2021年01期
Page:
28-34
Research Field:
·物理学·
Publishing date:

Info

Title:
Research on the Microstructure and Wear Properties ofIron-Based Composite Coating with WC
Author(s):
Zhu Jixiang1; Lei Sheng1; 2; Li Shuai1; Wu Yanbo1; Zhu Yinfeng1; Ren Yue3; Liu Yafeng1; Xu Haili1
(1.School of Mechanical and Electrical Engineering,Anhui Jianzhu University,Hefei 230601,China)(2.Key Laboratory of Intelligent Manufacturing of Construction Machinery of Anhui Province,Hefei 230601,China)(3.School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China)
Keywords:
laser cladding; wear performance; WC particles; Fe-based alloy; microstructure
PACS:
TG148
DOI:
10.3969/j.issn.1001-4616.2021.01.005
Abstract:
To solve the problem of serious wear and tear failure of guide roller parts,Fe-based composite cladding layers with different contents of WC were prepared for the surface of GCR15 bearing steel by laser cladding technology. The microstructure,element distribution,phase composition and wear resistance of the cladding layer were analyzed by SEM,EDS,XRD and wear tester. The results show that the addition of WC has an apparent influence on the microstructure and properties of the alloy cladding layer. The cladding layer has good metallurgical bonding with GCR15 bearing steel substrate. The microstructure of cladding layer is mainly composed of cellular crystals and equiaxed dendrites,and the main phase of it is Fe3W3C and Fe2W2C. Compared with the substrate,the average microhardness of the cladding layer increases obviously with the increase of WC content. When the content of WC is 50 wt.%,the average microhardness of cladding layer is the highest,which is about three times higher than that of GCR15 bearing steel substrate. In terms of wear resistance,the wear mechanism is mainly including abrasive wear and oxidation with the increase of WC mass fraction of cladding layer,the amount of wear decreases and then increases. The cladding layer with the 30 wt.% WC content has the best wear resistance.

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Last Update: 2021-03-15