Microstructure and Properties of Ni-W-Si Composite Coating by Laser Cladding

Li Guokai; Zhang Peilei; Lu Yunlong; Gao Jie; Liu Xiaopeng; Yan Hua

doi:10.15980/j.tzzz.2015.03.024

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Microstructure and Properties of Ni-W-Si Composite Coating by Laser Cladding
Vol. 35, Issue 3, Pages: 307-310(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.03.024

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[1]李国凯,张培磊,卢云龙,高杰,刘晓鹏,闫华.激光熔覆Ni-W-Si涂层的组织与性能[J].特种铸造及有色合金,2015,35(03):307-310.

Li Guokai, Zhang Peilei, Lu Yunlong, et al. Microstructure and Properties of Ni-W-Si Composite Coating by Laser Cladding. [J]. Special Casting & Nonferrous Alloys 35(3):307-310(2015)
[1]李国凯,张培磊,卢云龙,高杰,刘晓鹏,闫华.激光熔覆Ni-W-Si涂层的组织与性能[J].特种铸造及有色合金,2015,35(03):307-310. DOI： 10.15980/j.tzzz.2015.03.024.

Li Guokai, Zhang Peilei, Lu Yunlong, et al. Microstructure and Properties of Ni-W-Si Composite Coating by Laser Cladding. [J]. Special Casting & Nonferrous Alloys 35(3):307-310(2015) DOI： 10.15980/j.tzzz.2015.03.024.

摘要

以Ni-W-Si合金粉末为原料

利用激光熔覆技术在45号钢表面上制备了复合涂层

使用SEM、XRD与EDS等方法对涂层的显微组织、相组成进行了分析

讨论了不同W含量对涂层室温干滑动摩擦条件下耐磨性的影响。结果表明

W、W5Si3、WSi2及（Fe

Ni）固溶体使涂层的显微硬度显著提高（最高达1 040 HV）

随着W含量降低

涂层的硬度下降

磨损加快。

Abstract

Ni-W-Si intermetallic composite coatings were prepared by laser cladding on 45 steel with NiW-Si alloy powder as raw materials.Microstructure and composition of the coatings fabricated were characterized by SEM

XRD and EDS.Effects of W content on the hardness and wear resistance of the composite coatings were investigated in condition of dry sliding at room temperature.The results indicate that the coatings prepared with high handness can be attributed to the phases such as W、W5Si3、WSi2and（Fe

Ni）solid solution（the maximum hardness reaches 1 040HV）.The hardness of the coatings is decreased and wear loss is increased with the increase of W content in coatings.