Features of sliding friction of steel r6m5 on steel 45 in medium of litol-24 grease with additives of zinc and cadmium powders

The features of sliding friction of steel R6M5 on steel 45 at a load of up to 1400 N under conditions of lubrication with a plastic lubricant Litol-24 modified with zinc and cadmium in an amount of 3 and 2% (wt.), respectively, have been studied. It is shown that the modified lubricant reduces the friction force by ~5 times, and the friction coefficient by 4-9 times. At the same time, the graph of the dependence of the friction force on the normal force has four piecewise linear sections, in which the simple linear version of the Amonton-Coulomb law is observed, in contrast to friction under the conditions of the Litol-24 lubricant without additives, when the dependence graph consists of two sections. The generalized version of the Amonton-Coulomb law is also observed, which takes into account changes in the conditions of frictional interaction.