The paper examines the abrasive wear rate of samples produced by vacuum impregnation of ultrafine diamond (ASM 1/0) and molybdenum powders with tin bronze. The tests were performed using a SiC-based abrasive wheel in the presence of cooling water. The introduction of and increase in the ultrafine diamond powder in the samples substantially decrease their wear rate (by a factor of 78). The hardness of the samples first increases when diamond powder content rises to 5 wt.% and then decreases when ASM 1/0 content further rises to 11 wt.% because of small porosity that appears in the samples. The use of a bronze matrix containing more than 15 wt.% Sn does not decrease the wear rate of the test samples and, hence, of the associated diamond tools, in spite of increase in their hardness.
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Translated from Poroshkova Metallurgiya, Vol. 58, Nos. 9–10 (529), pp. 139–145, 2019.
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Umansky, V., Brodnikovsky, N., Bashchenko, O. et al. Wear Resistance of Bronze-Matrix Samples of Diamond Tubular Drills with Ultrafine Diamond and Molybdenum Powder Reinforcement. Powder Metall Met Ceram 58, 608–612 (2020). https://doi.org/10.1007/s11106-020-00114-z
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DOI: https://doi.org/10.1007/s11106-020-00114-z