Abstract
The influence of some additives, mainly esters of aryl-phoshonic acids, on steel-steel friction in wide load and sliding speed ranges has been studied. In the presence of effective additives at sliding speed of about 6–8 m per sec, the normal mode of friction (low friction coefficient) was observed in the whole range of applied axial loads up to 130–150 kg, the specific pressure being up to 35,000 kg per cm2. At higher sliding speeds the increase of the loads at a definite limit causes a decrease of the efficiency of some additives (the increase of the friction coefficient and wear). When the applied load is further increased, the additive becomes effective again. This phenomenon has been observed with other active additives too and may be explained by the mechanism of chemical modification of surface friction. Under different friction conditions this modification can be of different nature. Presented as an American Society of Lubrication Engineers paper at the ASME/ASLE International Lubrication Conferen...
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