Abstract
The paper examines the effect of nickel and phosphorus on the performance characteristics of antifriction graphite-bronze powder materials under high pressures (to 20 MPa), at substantial sliding velocities (1-2 m/sec), and with a liquid lubricant supplied from an oil-impregnated felt pad. It is established that Cu-Ni-P-C graphite bronze of the optimal composition has a friction coefficient of 0.028-0.045 and can perform till 150°C in the above conditions. The material is microheterogeneous: the bearing structural component is α solid solution of nickel in copper with the hardening phase being evenly distributed along its boundaries (Cu 3 P mesh with inclusions of phosphide eutectic (Cu-Ni) + Cu 3 P); the antifriction structural component represents graphite inclusions evenly distributed in the material matrix.
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