Iasmina-Mădălina Anghel, I. Uțu, A. Pascu, I. Hulka, Dino Woelk, G. Mărginean
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引用次数: 0
摘要
使用不同的材料和各种技术进行涂层沉积是改善合金表面性能的一种可行方法,尤其是在改善摩擦学性能的同时提高表面强度。在本研究中,通过激光熔覆技术在 AISI 904L 不锈钢基体表面制造了一系列含有不同比例 WC-CoCr-Ni 颗粒的 Co 基增强复合涂层。这项实验工作的主要目的是确定添加 WC 粒子对所获得 Co 复合涂层结构和性能的影响,即在提高滑动耐磨性的同时,不会对氯化物介质中的耐腐蚀性产生负面影响。通过扫描电子显微镜 (SEM)、X 射线衍射 (XRD) 以及摩擦系数和极化曲线的变化,分别研究了 WC 粒子对微观结构、相组成、显微硬度、磨损和腐蚀特性的影响。结果表明,新的相组成,特别是由于 WC 相的重熔而形成的新相,提高了耐磨性。电化学测试评估后未发现明显变化。
Microstructure and properties of Co based laser cladded composite coatings
Coatings deposition using different materials and various techniques are a viable method to improve the surface properties of alloys, especially the surface strength with improved tribological properties. In this study, a series of Co-based reinforced composite coatings containing different ratios of WC–CoCr–Ni particles were fabricated by laser cladding onto the surface of an AISI 904L stainless steel substrate. The main goal of this experimental work was to determine the influence of the WC particle addition on the structure and properties of the obtained Co composite coating in terms of improving the sliding wear resistance without negative influence the corrosion resistance in chloride media. The effect of the WC particles onto the microstructure, phase composition, microhardness, wear and corrosion properties, was investigated by means of scanning electron microscopy (SEM), X-ray diffraction (XRD) in association with the evolution of the friction coefficient and that of the polarization curves, respectively. The achieved results have shown that the new phase composition, especially developed due to the remelting of the WC phase, led to an improvement of the wear resistance. No significant changes were recorded after the electrochemical tests evaluation.
期刊介绍:
Materials Testing is a SCI-listed English language journal dealing with all aspects of material and component testing with a special focus on transfer between laboratory research into industrial application. The journal provides first-hand information on non-destructive, destructive, optical, physical and chemical test procedures. It contains exclusive articles which are peer-reviewed applying respectively high international quality criterions.