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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Microstructure and wear behavior of stellite 6 cladding on 17-4 PH stainless steel
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Microstructure and wear behavior of stellite 6 cladding on 17-4 PH stainless steel

机译：17-4 PH不锈钢上Stellite 6熔覆层的组织和磨损行为

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This paper deals with the investigation of the microstructure and wear behavior of the stellite 6 cladding on precipitation hardening martensitic stainless steel (17-4PH) using gas tungsten arc welding (GTAW) method. 17-4 PH stainless steel is widely used in oil and gas industries. Optical metallography, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were employed to study the microstructure and wear mechanisms. X-ray diffraction analysis was also used to identify phases formed in the coating. The results showed that the microstructure of the surface layer consisted of carbides embedded in a Co-rich solid solution with a dendritic structure. In addition, the dendritic growth in the coating was epitaxial. Primary phases formed during the process were Co (fcc), Co (hcp), lamellar eutectic phases, M_(23)C_6 and Cr_7C_3 type carbides. The results of the wear tests indicated that the delamination was the dominant mechanism. So, it is necessary to apply an inter-layer between the substrate and top coat.
机译：本文采用气体钨极电弧焊（GTAW）方法研究了沉淀硬化马氏体不锈钢（17-4PH）上Stellite 6熔覆层的组织和磨损行为。 17-4 PH不锈钢广泛用于石油和天然气行业。利用光学金相，扫描电子显微镜（SEM）和能量色散谱（EDS）研究了组织和磨损机理。 X射线衍射分析还用于鉴定涂层中形成的相。结果表明，表面层的微观结构由埋藏在具有树枝状结构的富钴固溶体中的碳化物组成。另外，涂层中的树枝状生长是外延的。在该过程中形成的主要相为Co（fcc），Co（hcp），层状共晶相，M_（23）C_6和Cr_7C_3型碳化物。磨损测试的结果表明，分层是主要机理。因此，有必要在基材和面漆之间施加中间层。

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