3301 二円筒試験におけるピッチングと固体接触の関係(OS4-1:接触問題,OS4:接触問題とトライボロジ,オーガナイズド・セッション(OS),第18回交通・物流部門大会(TRANSLOG2009))

概要

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The effect of metal-to-metal contact (i.e., solid contact) on pitting under rolling sliding contact has been investigated using twin disc tester. In order to monitor contact condition, contact resistance between two discs was measured and an eddy current probe was set on the disc surface as an in-situ crack detector. From the start to about 10^5 cycles, the entire discs undergo solid contacts. Then, two discs are completely separated with lubricant oil and pitting occurs at around 10^6cycles. During the test, a V-shaped crack of 500μm width was detected at 5x10^5cycles. It took only 2.5x10^4cycles for the crack to progress to a pit. Contact resistance datum indicate that the surface where pitting occurred had experienced not much solid contacts compared to the other part of the disc.
2009-12-02