Toshimi Sasaki1, Toshihiro Yamada1 and Kazuyoshi Hatano1
1Mechanical Engineering Research Laboratory, Hitachi Ltd., Tokyo
A study has been made on the effect of residual stress on wear of the hardened steels as well as the change of the stress induced in the sliding surface under a metal-to-metal dry condition in air using a Pin-and-Disk type wear machine. In the present experimental condition, the wear rate was found to remain almost constant regardless of the extent of stress retained in the steels before the sliding test. The stress thus induced reached a maximum value of -110 kg/mm2. The rise surface temperature with increasing sliding speed gave rise to a decrease in the stress induced in the surface layer. This change was found to be determined only by the sliding condition, being almost independent of the retained stress in the steels before sliding. It was found that the wear rate decreases with increasing compressive stress in the sliding surface. Therefore, there seems to exist a certain correlation between the stress in the sliding surface and the wear rate in the steels.
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