Abstract
The disk test on the disk-machine was carried out in order to determine the strength of slide-rolling contact under condition of specific sliding Σ1=5.35 and the sliding velocity was changed in the range of Vg=0∼20 m/s. The surface treatmeants for our tests were case-hardening, tufftride treatment, boronizing, hard chrome-coating, and ceramic coating. These were combined together. The materials were mainly SCM415 and further chilled cast iron (FC30) according to JIS. Limiting load for scoring, specific wear, and coefficient of friction were investigated under above mentioned condition. The lubricating oil for this investigation was turbine oil. The limiting load for scoring and the specific wear were changed very widely according to the kind of surface treatment and material, but the value of coefficient of friction lies in a certain range and does not change so widely according to the above mentioned various conditons.
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