The wear of centrifuge screws, common components in industrial and municipal wastewater treatment plants, is studied. The TN-20 tungsten-free hardmetal serves for protecting screw flights against abrasive wear. The 12Kh18N10T steel is primarily used in the manufacture of centrifuge screws. A combined technique of depositing protective wear-resistant coatings is proposed. The technique includes electrospark deposition of a T15K6 hardmetal electrode, application of a metal polymer material (MPM), and final laser processing. To reinforce the MPM, small portions of a VK6 hardmetal mixture were added to a two-component epoxy system filled with ferrosilicon and thoroughly stirred. The reinforcement content was ~60%. This technique produces coatings up to 600 μm thick, with 7.3–10.0 GPa microhardness and 100% continuity. Abrasive water jet tests of the 12Kh18N10T steel samples with protective coatings show that their wear resistance is 7.5 times higher than that of the uncoated samples.

中文翻译：

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激光加工对防护耐磨涂层定性参数的影响

研究了工业和市政污水处理厂中常见部件离心机螺杆的磨损。TN-20 无钨硬质合金用于保护螺杆螺纹免受磨损。12Kh18N10T 钢主要用于制造离心机螺杆。提出了一种沉积保护性耐磨涂层的组合技术。该技术包括 T15K6 硬质金属电极的电火花沉积、金属聚合物材料 (MPM) 的应用以及最终的激光加工。为了增强 MPM，将小部分 VK6 硬质合金混合物添加到填充有硅铁的双组分环氧树脂系统中并充分搅拌。增强剂含量为~60%。该技术可生产厚度达 600 μm、显微硬度为 7.3-10.0 GPa 且连续性为 100% 的涂层。