A Comprehensive Study on Microstructure and Wear Behavior of Nano-WC Reinforced Ni60 Laser Coating on 17-4PH Stainless Steel

被引:1
|
作者
Wang, Jie [1 ]
Zhang, Xiaoqiang [1 ]
Qiao, Lei [1 ]
Zhao, Yue [1 ]
Ren, Mengfei [1 ]
Li, Tiaotiao [1 ]
Li, Ruifeng [1 ]
机构
[1] Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang 212000, Peoples R China
关键词
laser cladding; microstructure; wear mechanism; composite coating; TRIBOLOGICAL PROPERTIES; PARTICLES;
D O I
10.3390/coatings14040484
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The surface of 17-4PH martensitic stainless steel was laser-cladded with Ni60 and Ni60+nano-WC composites and a comprehensive investigation was conducted of the microstructure and wear mechanism. The findings demonstrate that despite the added nano-WC particles being fused and dissolved during laser cladding, they still lead to a reduction in grain size and a decrease in crystallographic orientation strength. Furthermore, the dissolution of nano-WC makes the lamellar M23C6 carbides transform into a rod or block morphology, and leads to the CrB borides becoming finer and more evenly dispersed. This microstructural evolution resulted in a uniform increase in hardness and wear resistance, effectively preventing crack formation. When the nano-WC addition increased to 20 wt.%, there was a 27.12% increase in microhardness and an 85.19% decrease in volume wear rate compared to that of the pure Ni60 coating. Through analysis of the microstructure and topography of wear traces, it can be inferred that as the nano-WC addition increased from 0 wt.% up to 20 wt.%, there was a gradual transition from two-body abrasive wear to three-body abrasive wear, ultimately resulting in adherent wear.
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页数:15
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