The Wear Features of Powder Cobalt Alloys Strengthened with Titanium Carbide

Abstract

The wear-resistance of powder cobalt alloys with titanium carbide is studied in fretting corrosion conditions at 20, 300, 650, 800, and 1050°C under varying loads and durations. The alloys of different porosity are obtained by hot pressing of the powders of cobalt, chromium, aluminum, iron, and titanium carbide. The wear of alloys with 30, 50, and 70 vol.% carbide is determined. The dependence of the average linear wear of powder alloys on the sample porosity and loads during the tests is established. The wear-resistance of alloys is mainly affected by the temperature: the average linear wear rate increases with increasing temperature, regardless of the carbide content. The results are the basis for choosing the optimal alloy composition for the field tests during developing friction materials for aviation applications.