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首页> 外文期刊>Materials Science and Engineering >Microstructure and mechanical characterization of NiCrBSi alloy and NiCrBSi-WC composite coatings produced by flame spraying
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Microstructure and mechanical characterization of NiCrBSi alloy and NiCrBSi-WC composite coatings produced by flame spraying

机译：火焰喷涂NiCrBSi合金和NiCrBSi-WC复合涂层的组织与力学性能

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In this work, an experimental study is conducted on the microstructure and mechanical properties of NiCrBSi and NiCrBSi reinforced with WC coatings, produced onto mild steel substrate by flame spraying technique. The resulting layers were analyzed using optical microscopy, scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) analysis. Roughness measurements were made using a roughness measuring system. Microhardness tests were carried out using a microdurometer operating with Vickers indenter and the load being 3N. The results show that the microstructure contain some inhomogeneities such us pores, microcracks for the composite coating and oxides. The XRD analysis reveal that the phases present within the coatings are different from the initial powders. In addition, the presence of WC hard particles makes the hardness of the composite coating much higher than the metal alloy.
机译：在这项工作中，对通过火焰喷涂技术在低碳钢基材上生产的WC涂层增强的NiCrBSi和NiCrBSi的组织和力学性能进行了实验研究。使用光学显微镜，扫描电子显微镜（SEM）结合能量色散X射线光谱（EDX）和X射线衍射（XRD）分析对所得层进行分析。使用粗糙度测量系统进行粗糙度测量。使用在维氏压头下运行且负载为3N的显微硬度计进行显微硬度测试。结果表明，微观结构包含一些不均匀性，例如孔，复合涂层的微裂纹和氧化物。 XRD分析表明，涂层中存在的相与初始粉末不同。另外，WC硬颗粒的存在使复合涂层的硬度远高于金属合金。

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