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Abstract

This paper offers a simplified model of seizure process that provides a foundation to develop the effective friction control in tribo-systems in one of a great National R&D program to prevent global warming that has been presented by Japanese Ministry of Economy, Trade and Industry and is supported financially by New Energy and Industrial Technology Development Organization.The seizure is defined as severe wear mode in this paper and thus the critical condition of seizure is that of the transition from mild to severe wear mode. In the severe wear mode, plastic deformation called ‘wedge’ by Cocks or ‘prow’ by Antler is considered to take place in considerably large area due to the combination of contact pressure and shear stress. The concept, with which Burwell and Strang accounted the effect of load on the transition of wear mode, is employed for the critical pressure. The hardness distribution, which relates the critical pressure, is assumed in a simple function estimated roughly from the temperature distribution in the direction of depth from surface.The relation between seizure and the product of contact pressure and sliding velocity, i.e., pV value, is discussed.