Wear Behaviours of Metals under Lubricated Condition and the Effect of Small Electric Potential

概要

論文の詳細を見る
The wear of metals in the lubricating oil under mild conditions is considered to be due to surface fatigue, and some correlations are found between wear fragment and surface topography. Effect of small electric potential between the mating surface on wear behaviours are also examined. By using test pieces off annealed carbon steel, the most frequent value of diameter of wear fragments is found to be nearly equal to roughness pitch of worn surface and they vary in like manner with sliding distance. When the same metals are paired for the wear test and small electric potential is applied between the mating surfaces, wear rates of both the metals increase monotonously with voltage regardless of its polarity. When different metals are paired, wear rates of both are minimized under a voltage which is nearly equal to the voltage cancelling the contact electric potential. The diameter of wear fragments and also the roughness pitch are the largest at the voltages. These results are explained by the change of hardness and the lubricating condition in accordance with the change of surface energy which is in close relation to the electric potential of the surface.
一般社団法人日本機械学会の論文