Poloczek Tomasz, Lont Aleksandra, Górka Jacek
Welding Department, Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego Street 18A, 44-100 Gliwice, Poland.
Materials (Basel). 2023 Feb 1;16(3):1265. doi: 10.3390/ma16031265.
This article presents production results concerning metal matrix composite-coatings made using the laser-cladding technology. The enhancement of the wear resistance of the material surface is the one of the main goals accompanying the manufacturing of composite coatings. Nickel-based superalloys are used in several industries because they are characterized by a number of desirable properties including high tensile and fatigue strength as well as resistance to high-temperature corrosion in aggressive environments. One of the most interesting materials from the group of superalloys is Inconel 625, used as a matrix material in tests discussed in this article. However, nickel-based superalloys are also characterized by an insufficient wear resistance of the surface, therefore, in relation to the tests discussed in this article, Inconel 625-based composite coatings were reinforced by adding 10%, 20% and 40% of titanium carbide particles. The addition of hard phases, i.e., TiC, WC or SiC particles can have a positive effect on the erosion resistance of cladded specimens. The aim of the experiment was to determine the impact of the titanium carbide content on the structure of the alloy and its resistance to corrosive wear, enabling the extension of the service life of Inconel 625/TiC composite coatings. The investigation included microhardness tests, corrosion resistance analysis, penetrant tests, macrostructure and microstructure analyses and X-ray diffraction (XRD) tests. The TiC particles increased the hardness of the coatings and, in general, had a negative impact on the corrosion resistance of pure Inconel 625 coatings. However, the increased homogeneity of composite coatings translated into the improvement of corrosion resistance.
本文介绍了采用激光熔覆技术制备金属基复合涂层的生产成果。提高材料表面的耐磨性是制造复合涂层的主要目标之一。镍基高温合金因其具有许多理想性能，包括高拉伸强度和疲劳强度以及在侵蚀性环境中的耐高温腐蚀性，而被应用于多个行业。高温合金组中最有趣的材料之一是因科镍合金625，在本文讨论的试验中用作基体材料。然而，镍基高温合金的表面耐磨性也不足，因此，就本文讨论的试验而言，通过添加10%、20%和40%的碳化钛颗粒来增强基于因科镍合金625的复合涂层。添加硬质相，即TiC、WC或SiC颗粒，对熔覆试样的耐冲蚀性可能有积极影响。该实验的目的是确定碳化钛含量对合金组织及其耐腐蚀磨损性能的影响，从而延长因科镍合金625/TiC复合涂层的使用寿命。研究包括显微硬度测试、耐腐蚀性分析、渗透检测、宏观结构和微观结构分析以及X射线衍射（XRD）测试。TiC颗粒提高了涂层的硬度，总体上对纯因科镍合金625涂层的耐腐蚀性有负面影响。然而，复合涂层均匀性的提高转化为耐腐蚀性的改善。
