It is aimed to investigate the coating of AISI316 stainless steel with NiCrBSi/WC at different ratios using TIG method. In this study, the Ni-based WC-reinforced MMC layer was manufactured by the TIG composite coating method, and then the microstructure of the coating layer was examined. Microstructure and phase components of the composite coatings were characterized by optical microscopy, scanning electron microscopy, and X-ray diffraction. A metallurgic bound was found between the coating layer and the substrate through the TIG coating process. WC was re-solidified in the matrix by dissolving with high input energy. Several phases were found, including Ni-rich ([Formula: see text]-Ni) primary dendritic phase, Ni-Ni3B, and Ni3Si eutectic structure, Cr7C3, Cr2B3, Cr3Ni2, Ni2W4C, and Ni[Formula: see text]W3 phases in dendritic structures. The presence of carbides in the structure had affected the hardness of the coating. The maximum hardness value was found to be 469.5 HV and the hardness of the coating layers was increased at least 2.5 times compared to that of the substrate material.

中文翻译：

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TIG涂层工艺沉积在AISI316不锈钢上的NiCrBSi/WC复合涂层的显微组织

【摘要】：目的采用TIG法研究不同比例NiCrBSi/WC对AISI316不锈钢的涂层。在本研究中，采用 TIG 复合涂层法制备了 Ni 基 WC 增强 MMC 层，然后研究了涂层的微观结构。通过光学显微镜、扫描电子显微镜和X射线衍射对复合涂层的微观结构和相成分进行了表征。通过 TIG 涂层工艺在涂层和基材之间发现了冶金结合。WC 通过在高输入能量下溶解而重新凝固在基体中。发现了几个相，包括富镍（[公式：见正文]-Ni）初生枝晶相，Ni-Ni3B，和镍3硅共晶结构，Cr7C3, 铬2乙3, 铬3你2， 你2W4C、Ni[公式：见正文]W3树枝状结构中的相。结构中碳化物的存在影响了涂层的硬度。发现最大硬度值为 469.5 HV，涂层的硬度与基材相比至少增加了 2.5 倍。