Abstract
In this study the influence of micro structure of wear resistant materials consisting of hard phase and metal matrix on particle erosion rate at high temperature was investigated. High temperature erosion tests were carried out by a centrifugal erosion tester, and worn surfaces were observed by SEM to clarify the wear mechanism. From the results of the tests and the observation, it was found that erosion was caused by the platelet mechanism of the metal matrix. A new erosion model was discussed and a new parameter Spm, which represents severity of the platelet formation in the metal matrix, was proposed. To decrease erosion rate of a material, it is necessary to design a material whose value of Spm is small.
