钨铬钴合金
材料科学
微观结构
热喷涂
涂层
冶金
马氏体不锈钢
基质(水族馆)
摩擦学
脆性
复合材料
马氏体
海洋学
地质学
作者
Costel-Relu Ciubotariu,Doina Frunzăverde,Gabriela Mărginean,Viorel Aurel Şerban,Aurel Valentin Bîrdeanu
标识
DOI:10.1016/j.optlastec.2015.09.005
摘要
Cobalt base alloys are used in all industrial areas due to their excellent wear resistance. Several studies have shown that Stellite 6 coatings are suitable not only for protection against sliding wear, but also in case of exposure to impact loading. In this respect, a possible application is the protection of hydropower plant components affected by cavitation. The main problem in connection with Stellite 6 is the deposition procedure of the protective layers, both welding and thermal spraying techniques requesting special measures in order to prevent the brittleness of the coating. In this study, Stellite 6 layers were HVOF thermally sprayed on a martensitic 13-4 stainless steel substrate, as usually used for hydraulic machinery components. In order to improve the microstructure of the HVOF-sprayed coatings and their adhesion to the substrate, laser remelting was applied, using a TRUMPF Laser type HL 124P LCU and different working parameters. The microstructure of the coatings, obtained for various remelting conditions, was evaluated by light microscopy, showing the optimal value of the pulse power, which provided a homogenous Stellite 6 layer with good adhesion to the substrate.
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