真空中における摩耗の機構について

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タイトル別名
  • Mechanism of Wear in Vacuum (Wear of Steels at High Temperature (6th Report))
  • シンクウ チュウ ニ オケル マモウ ノ キコウ ニ ツイテ

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The difference of wear loss in vacuum and in air was ascribed to the hard layer at the surface, but there is no definite conclusion about the relation between the hardness and the wear. This is because the hardness of surface changes during the test. So a short-time test is essential. This report is concerned with the relation between wear and hardness in short-time wear tests. There is a critical hardness which distinguishes the wear state and which depends upon the testing temperature. This critical hardness decreases with increasing testing testing temperature. The effects of speed and surface load on the critical hardness are also studied. The conclusion is that the hardness is related to the separation of wear powder from the surface and that the critical hardness is decided by the relative hardness of wear powder and surface of a test piece. Moreover it is concluded that the wear itself is promoted by the wear powder.

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