The paper examines how to increase the reliability and service life of dynamic equipment parts operating at high speeds, loads, and temperatures and in corrosive, abrasive, and other environments. Increase in the thickness of the high-hardness layer for friction parts subjected to abrasive and other types of wear is a relevant problem. The research findings and the method developed for protecting steel products against wear by applying a quasimultilayer wear-resistant coating (QWC) onto the wear surface by electrospark deposition (ESD) and increasing the thickness of the high-hardness layer are described. Based on metallography, hardness measurement, electron microprobe analysis, and X-ray diffraction, the regularities of producing the QWC with alternating alloying electrodes by sequential ESD of carbon, aluminum, and T15K6 hardmetal layers onto a 12Kh18N10T steel substrate are established. The coatings deposited in this sequence have the greatest high-hardness area (320–360 μm) and the smallest surface roughness (7.5 μm). The formation of TiC carbides, intermetallic compounds, and a disordered bcc solid solution promotes the maximum microhardness of the surface layer (approximately 11500 MPa). The diffusion zones of carbon and tungsten increase in the process. Electrospark deposition in accordance with the described technique allows the hardness and thickness of the strengthened layer to be increased. The experiments show that the hardness and thickness of the high-hardness layer cannot be increased only with alternating alloying electrodes by successive deposition of carbon and T15K6 layers (without an aluminum sublayer) on a 12Kh18N10T steel substrate.

中文翻译：

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多层涂层的电火花沉积

本文探讨了如何提高在高速、高负载和高温以及腐蚀性、磨蚀性和其他环境中运行的动态设备部件的可靠性和使用寿命。增加遭受磨料和其他类型磨损的摩擦部件的高硬度层的厚度是一个相关问题。描述了通过电火花沉积 (ESD) 在磨损表面上施加准多层耐磨涂层 (QWC) 并增加高硬度层的厚度来保护钢铁产品免受磨损的研究成果和方法。基于金相学、硬度测量、电子显微探针分析和 X 射线衍射，通过碳、铝、并在 12Kh18N10T 钢基材上建立 T15K6 硬质合金层。按此顺序沉积的涂层具有最大的高硬度区域（320-360 μm）和最小的表面粗糙度（7.5 μm）。TiC碳化物、金属间化合物和无序bcc固溶体的形成促进了表面层的最大显微硬度（约11500 MPa）。碳和钨的扩散区在此过程中增加。根据所述技术的电火花沉积允许增加强化层的硬度和厚度。实验表明，仅通过在 12Kh18N10T 钢基材上连续沉积碳和 T15K6 层（无铝亚层）交替合金化电极，不能增加高硬度层的硬度和厚度。