Abstract
By using a crossed cylinder friction machine, the rolling-sliding friction tests under a lubricating condition were carried out, and the scoring marks which had been induced by single friction were studied. Then the initial situation of scoring can be decided by using a drawing method from the scoring marks on upper and lower cylindrical specimens. The features of scoring marks on the normalized steel, the hardened and tempered steel and the surface-hardened steel were also clarified by the observation with a microscope. And then the surface flash temperature at the initial situation of scoring was investigated on the basis of calculating results of frictional surface temperature in the elliptical contact area.
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