Tribotechnical Characteristics of Anti-Friction Material Based on Silver with the Added Molybdenum Disulphide

The evaluation of the determination of the friction coefficients and the wear intensity of an anti-friction material based on silver with the addition of molybdenum disulfide is given. The results of studies of the friction coefficients in the contacting pair are presented — steel SHX-15 and antifriction material based on silver with the addition of molybdenum disulfide. The average value of the coefficient of friction at a run of 1200 m. in a pair, a ball made of SHX-15 steel and a ring with a cover made of an antifriction material containing 94 % silver and 6 % molybdenum disulfide is 0,128 with a standard deviation of 0.006. At a run of 15000 m, the average coefficient of friction was 0.129 with a standard deviation of 0.01. For a friction pair of an anti-friction material containing 94 % silver and 6 % molybdenum disulfide and steel SHX-15, the coefficient of wear intensity of the antifriction surface at a contact voltage of 330 MPa is I = 0.86×10^–6 mm³/m, and for a counterbody in the form of a steel ball I_sh = 2.85×10^–8 mm³/m. Since the wear rate of the ball is two orders of magnitude lower than the wear rate of the friction material, the wear of the ball can be ignored in resource calculations. The obtained dependence of the coefficient of wear intensity on the maximum contact stresses will allow us to develop a calculation method for wear spherical articulated bearings.

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