Abstract
The results of studying the effect of the additive powder of the iron-chromium alloy PH-30 on the tribological properties of a composite friction material based on copper operating in the conditions of boundary friction are presented. It is shown that the introduction of 10 to 40 vol % PH-30 powder helps to increase the coefficient of friction from 0.042 to 0.075. It is found that at 10 vol % PH-30 the material’s wear is minimal and is 4 μm/km, while at 40 vol %, catastrophic wear is observed, exceeding 20 μm/km. The limit value of the material’s wear of 9 μm/km is noted with the powder content of PH-30 of less than 28 vol %. The increase in the tribotechnical properties of copper-based friction material with the addition of PH-30 powder is explained by the action of not only the PH-30 powder itself but also Fe4Cu3, FeSn intermetallide, and solid ceramic particles of chromium carbide Cr23C6 formed on the surface after sintering.
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