激光熔覆Fe/NiCr-Cr3C2复合涂层的组织和磨损性能

doi:10.13251/j.issn.0254-6051.2021.05.034

金属热处理 ›› 2021, Vol. 46 ›› Issue (5): 196-201.DOI: 10.13251/j.issn.0254-6051.2021.05.034

激光熔覆Fe/NiCr-Cr₃C₂复合涂层的组织和磨损性能

夏同川^1,2, 刘汀^1,2, 张林¹, 方钊³, 李明喜^1,2

1.安徽工业大学先进金属材料绿色制备与表面技术教育部重点实验室, 安徽马鞍山 243002;
2.安徽工业大学材料科学与工程学院, 安徽马鞍山 243002;
3.马鞍山市申马机械制造有限公司, 安徽马鞍山 243000

收稿日期:2020-10-27 出版日期:2021-05-25 发布日期:2021-07-21
通讯作者: 李明喜,教授,博士,E-mail:limingxi@ahut.edu.cn
作者简介:夏同川(1995—),男,硕士研究生,主要研究方向为激光熔覆,E-mail:1179471273@qq.com。
基金资助:
安徽省重点研究与开发计划(1804a09020006)

Microstructure and wear resistance of laser clad Fe/NiCr-Cr₃C₂ composite coating

Xia Tongchuan^1,2, Liu Ting^1,2, Zhang Lin¹, Fang Zhao³, Li Mingxi^1,2

1. Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials, Ministry of Education, Anhui University of Technology, Ma'anshan Anhui 243002, China;
2. School of Materials Science and Engineering, Anhui University of Technology, Ma'anshan Anhui 243002, China;
3. Maanshan Shenma Machinery Manufacturing Co., Ltd., Ma'anshan Anhui 243000, China

Received:2020-10-27 Online:2021-05-25 Published:2021-07-21

摘要/Abstract

摘要： 利用激光熔覆技术在GCr15 钢表面制备Fe/NiCr-Cr₃C₂复合涂层,研究不同NiCr-Cr₃C₂含量对铁基涂层微观组织和磨损性能的影响。结果表明:随NiCr-Cr₃C₂含量的增多,复合涂层显微组织逐渐细化,在铁基合金里掺入NiCr-Cr₃C₂金属陶瓷粉末导致复合涂层里残留奥氏体含量增多,α-Fe相含量减少,截面硬度显著降低。当加入10%NiCr-Cr₃C₂时,复合涂层中出现较多的Cr₃C₂和Cr₂₃C₆硬质相,同时磨痕表面生成了具有减摩作用的氧化产物,从而降低了磨耗和摩擦阻力,使涂层表现出最佳的耐磨性能。

关键词: 激光熔覆, Fe/NiCr-Cr₃C₂复合涂层, 微观组织, 耐磨性

Abstract: Fe/NiCr-Cr₃C₂ composite coating was prepared on GCr15 steel surface by laser cladding, and the effect of NiCr-Cr₃C₂ on microstructure and wear resistance of the composite coating was investigated. The results indicate that the microstructure of the composite coating refines gradually with the increase of NiCr-Cr₃C₂ content from 0 to 20%. With addition of NiCr-Cr₃C₂ into the Fe-base alloy, the residual austenite content increases in the composite coating, while the α-Fe phase content decreases, resulting in the decrease of cross-section microhardness. The composite coating added with 10% NiCr-Cr₃C₂ exhibits optimal wear resistance, and reduces the wear loss and friction resistance, which can be attributed to the formation of many hard carbide phases (Cr₃C₂ and Cr₂₃C₆) and oxide lubricating phase during wear process.

Key words: laser cladding, Fe/NiCr-Cr₃C₂ composite coating, microstructure, wear resistance

中图分类号:

TG174.44

夏同川, 刘汀, 张林, 方钊, 李明喜. 激光熔覆Fe/NiCr-Cr₃C₂复合涂层的组织和磨损性能[J]. 金属热处理, 2021, 46(5): 196-201.

Xia Tongchuan, Liu Ting, Zhang Lin, Fang Zhao, Li Mingxi. Microstructure and wear resistance of laser clad Fe/NiCr-Cr₃C₂ composite coating[J]. Heat Treatment of Metals, 2021, 46(5): 196-201.

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激光熔覆Fe/NiCr-Cr₃C₂复合涂层的组织和磨损性能

Microstructure and wear resistance of laser clad Fe/NiCr-Cr₃C₂ composite coating

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