Applicability of Sn-Zn alloy as self-lubricating coating

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  • Sn-Zn 合金の自己潤滑膜としての適用可能性

Abstract

<p>The present study describes wear behavior of soft thin film coated chromium alloy steel in lubricated rolling/sliding contact condition. Soft thin film consisting of tin (Sn) and zinc (Zn) was coated with dry and wet processes and an additional heat treatment with a halogen lamp was occasionally applied. Wear properties were evaluated with a developed rolling/sliding contact testing apparatus at a constant slip ratio of 20% and at a 3 GPa of maximum contact stress using a ball and a shaft specimen. Results showed that the wear loss of Sn and Zn coating surface fabricated with the dry process was considerably smaller than that of the non-coated and the wet plating specimens. In addition, effectiveness of the heat treatment was found. An x-ray diffraction analysis and a micro hardness measurement are connected to evaluate subsurface mechanical properties and phase transformation. Effects of Sn and Zn coating accompanying with the heat treatment on the wear reduction of alloy steel surface was discussed.</p>

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