転がり摩擦の研究(第5報) : 高荷重繰返し転がりによる純転がり摩擦力の挙動

概要

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The rolling friction of the quenched and tempered SUJ 2 steel under Hertzian pressures less than 2.45 GPa does not vary after the first ten rolling passes and it takes the smallest value at 300℃ tempering. On the other hand, the rolling fatigue life is longest at 150℃ tempering. These phenomena can not be understood from the viewpoint of energy loss. In order to clarify the cause of this obscure phenomenon, the variation of the rolling friction with the number of rolling passes up to 10^5 cycles is experimentally examined under Hertzian pressures from 2.45 to 3.43 GPa. As the number of rolling passes increases from 10 to 10^5 cycles, the rolling friction shows little variation under 2.45 GPa but under 3.43 GPa it varies markedly. On the specimen tempered at 150℃, the rolling friction decreases monotonously as the number of rolling passes increases. On the specimen tempered at 300℃, however, the rolling friction increases with the number of the rolling passes up to 5 x 10^3 cycles, and then decreases to settle down to a small value after 10^5 cycles. After 10^5 rolling passes, the specimen tempered at 150℃ is scarcely grooved, but the specimen tempered at 300℃ is grooved considerably by plastic deformation. The difference of the frictional behavior between the both specimens in repeated rolling cycles is understood by this plastic deformation.
公益社団法人精密工学会の論文
1983-09-05