The paper analyzes the distribution of doping elements and their influence on the phase composition, structure, and tribological properties of a new self-lubricating copper-based antifriction composite doped with nickel, titanium, aluminum, and silicon, with additions of the CaF₂ solid lubricant. The composite is intended for operation at elevated loads up to 2.0 MPa and high rotation speeds up to 10,000 rpm. The maps of chemical elements showed that they were uniformly distributed over the composite and there were no segregation phenomena. The homogeneous distribution of doping elements throughout the volume promoted strengthening phases that were uniformly distributed in the composite. These phases, together with the CaF₂ solid lubricant distributed uniformly, increased the tribological properties in severe friction conditions. The composite’s high tribological properties were due to a uniform antiseize film that developed on the contact surfaces in operation, preventing the adhesion of surfaces and providing constant self-lubrication. The experimental results indicated that the new composite, Cu–(4.0–6.0)% Ni–(1.0–1.5)% Ti–(7.0–10.0)% Al–(0.5–0.8)% Si–(5.0–8.0)% CaF₂, had greater antifriction characteristics than the well-known BrOTsS6-6-3 cast bronze used in the same operating conditions. In operation of the cast bronze, high rotation speeds lead to the ejection of the liquid lubricant by centrifugal forces from the contact area. The contact surfaces thus remain unprotected, which increases the friction coefficient and wear rate and leads to seizure of the contact surfaces. Homogeneous antiseize friction films make the new composite effective in operation without liquid lubrication at high rotation speeds and elevated loads. Such films act as a third, lubricating component in the friction unit along with the composite and the counterface. The antifriction copper-based composite can be recommended for friction units of high-speed web offset printing machines.

本文分析了掺杂元素的分布及其对添加了固体CaF _{2 的}镍、钛、铝和硅的新型自润滑铜基减摩复合材料的相组成、结构和摩擦学性能的影响。润滑剂。该复合材料旨在在高达 2.0 MPa 的高负载和高达 10,000 rpm 的高转速下运行。化学元素图表明它们均匀分布在复合材料上，没有偏析现象。掺杂元素在整个体积中的均匀分布促进了均匀分布在复合材料中的强化相。这些相，连同 CaF ₂固体润滑剂分布均匀，增加了在严重摩擦条件下的摩擦学性能。该复合材料的高摩擦学性能是由于在操作过程中在接触表面形成的均匀防卡膜，可防止表面粘附并提供持续的自润滑。实验结果表明，新型复合材料 Cu–(4.0–6.0)% Ni–(1.0–1.5)% Ti–(7.0–10.0)% Al–(0.5–0.8)% Si–(5.0–8.0)% CaF ₂，具有比在相同操作条件下使用的众所周知的 BrOTsS6-6-3 铸青铜更好的减摩特性。在铸造青铜的操作中，高转速导致液体润滑剂通过接触区域的离心力喷射。接触面因此保持不受保护，这增加了摩擦系数和磨损率并导致接触面咬死。均匀的防卡摩擦膜使新复合材料在高转速和高负载下无需液体润滑即可有效运行。这种薄膜与复合材料和配合面一起作为摩擦单元中的第三种润滑成分。抗摩擦铜基复合材料可推荐用于高速轮转胶印机的摩擦单元。