| Autor: |
Tarelnyk, V.B., Konoplianchenko, Ie.V., Gaponova, O.P., Tarelnyk, N.V., Martsynkovskyy, V.S., Sarzhanov, B.O., Sarzhanov, O.A., Antoszewski, B. |
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| Zdroj: |
Powder Metallurgy & Metal Ceramics; 2020, Vol. 58 Issue 11/12, p703-713, 11p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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