Operational Properties of Metal–Metal Friction Members with Surface Layers Modified by Copper-Based Alloy

The interrelation of the structure and tribomechanical characteristics of the metal materials that comprise the friction members is considered, specifically the interactions between copper alloy – steel and steel with Cu – Zn coatings – steel. The formation of a wear-resistant structural state in the operational layer of Cu – Zn alloys with concentrations of up to 93% of Zn is described. The tribomechanical efficiency of Cu – Zn coatings obtained by two methods is considered from the standpoint of the regularities of the formation of a wear-resistant structure, namely friction-mechanical treatment and cold gas-dynamic spraying. It is demonstrated that regardless of the technology used for the surface modification of a steel product with a copper-based alloy, a secondary self-organizing structure with parameters characteristic of the wear-resistant state is formed in the operational layer as a result of contact deformation, which ensures an increase in the durability of tribological contacts.