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Vol.8, No.3, 149 ~ 166, 1970

Title

Fundamental Research on respect to the Scoring of the Gear Materials

정선모 Sun M . Chung

Abstract

This report made on the fundamental problems of the scoring of lubricated gear by using sliding wear tester experimentally and analytically. The research shows that the mechanism of scoring different from that of destructive damage by stress and fatigue. As the sliding frictions increased by high contact pressure, the oil films destroyed partially and becomes the state of boundary lubrication. At this state the scoring damage will be occurred by flash temperature high up instantaneously in the very small part of the contact surface of gear materials at very lower temperature than the original melting point of gear materials. It depends mostly on the viscosity and atmosphere of the various lubricants. And the results shows that the scoring will he occurred the value of the modulus of dimensionless parameter λ is over than (1×10^(-3)). here, β=ηn/p(dimensionless parameter of lubrication) μ=β.λ ∴λ=μ/β η: Absolute viscosity of lubricants p: Contact pressure n: Number of revolution μ: Coefficient of friction And studied compratively on the value of the flash temperature measured by using thermocouple with the Bloks formula on the ascending temperature of the contact surface of tooth.

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