The Formation of Surface Films at the Transition between Mild and Severe Metallic Wear

摘要: The conditions of sliding have been found in which a transition occurs between the regimes mild and severe wear for leaded brass (60/40 containing 2% lead) on hardened steel without lubrication. At light loads, low speeds, temperatures, begins when sufficient time is available to establish protective surface film by oxidation; addition, also at heavy high speeds temperatures because an increase rate oxidation. topography composition films generated during examined reflexion electron microscopy X-ray micro-analysis. presence relatively large proportion iron oxide layers, originating from steel, increases their hardness and, turn, causes itself. variation rates with load speed complex contrast process, there no unique mechanism wear. It concluded that results combined effects intermittent metal-to-metal contact, abrasion particles, flaking layers surface.