四球試験におけるすずめっき熱拡散処理層の摩擦特性

概要

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To clarify the seizure resistance and the frictional characteristics of a stainless steel ball, which was thermally diffused after being Sn-plated, the four-ball test was run under dip-feed lubrication and thin film lubrication. From the seizure test, the following results were obtained. Under dip-feed lubrication, the coefficient of friction was decreased with increasing thickness of the Sn-diffused layer, and the seizure resistance of the ball was increased with increasing thickness of the diffused layer. The seizure resistance of the ball in which the diffused layer was 8 μm thick was about 2.6 times larger than that without a diffused layer. Furthermore, under thin film lubrication, the running time at the incipient stage of seizuring with balls in which the thickness of the Sn-diffused layer exceeded 4 μm was about 5 min, independent of the thickness of its layer, and this was considerably longer than that without a diffused layer.
1992-09-25