Effect of laser remelting on microstructure and properties of WC reinforced Fe-based amorphous composite coatings by laser cladding
Effect of laser remelting on microstructure and properties of WC reinforced Fe-based amorphous composite coatings by laser cladding
复制标题
激光重熔对激光熔覆WC增强铁基非晶复合涂层组织和性能的影响
DOI：
10.1016/j.optlastec.2018.01.024
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发表时间：
2018-07
影响因子：
5
通讯作者：
Shengfeng Zhou;Yong-bo Xu;Bangquan Liao;Yajuan Sun;Xiaoqin Dai;J. Yang;Zhengyang Li
中科院分区：
文献类型：
--
作者：
Shengfeng Zhou;Yong-bo Xu;Bangquan Liao;Yajuan Sun;Xiaoqin Dai;J. Yang;Zhengyang Li
采用矩形光斑激光熔覆技术制备了WC增强铁基非晶复合涂层。研究了激光重熔对复合涂层组织和性能的影响。结果表明，激光重熔可减少熔覆层的裂纹和气孔，提高熔覆层的表面质量。熔覆层和重熔层顶部析出大量晶相。然而，重熔涂层顶部的显微组织比熔覆涂层顶部的显微组织更细。随着离基体表面距离的增加，熔覆层中出现了非晶相，并析出了大量的富Fe、Mo的碳化物、Fe 23 B6、γ-Fe和Cr9.1Si0.9相。结果表明，熔覆层的耐蚀性高于熔覆层。熔覆层的显微硬度比熔覆层高1.13倍。
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 Cr9.1Si0.9phases 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.