材料科学
微观结构
涂层
包层(金属加工)
无定形固体
复合数
压痕硬度
复合材料
冶金
激光器
碳化物
腐蚀
光学
化学
物理
有机化学
作者
Shengfeng Zhou,Yongbo Xu,Bangquan Liao,Yajuan Sun,Xiaoqin Dai,Jiaoxi Yang,Zhengyang Li
标识
DOI:10.1016/j.optlastec.2018.01.024
摘要
Abstract The WC reinforced Fe-based amorphous composite coatings were prepared by laser cladding with rectangular spot. The effect of laser remelting on the microstructure and properties of composite coatings was investigated. The results showed that laser remelting can reduce the cracks and porosities of the cladding coating and improve its surface quality. Large amounts of crystalline phases were precipitated at the top of the cladding and remelting coatings. However, the microstructure at the top of the remelting coating was finer compared to that at the top of the cladding coating. With increasing distance from the surface of substrate, the amorphous phase appeared within the remelting coating and large amounts of carbides rich in Fe and Mo, Fe23B6, γ-Fe and Cr9.1Si0.9 phases were also precipitated in the remelting coating. As a result, the corrosion resistance of the remelting coating was higher than that of the cladding coating. The microhardness of the remelting coating was approximately 1.13 times higher than that of the cladding coating.
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