Wear of Alloy Steels by Impact of Powder at High Temperature

In our previous study, as a result of the air-blast erosion tests at room temperature, the wear of materials by impact of powder could be estimated from the impinging conditions and the properties of materials and particles. In this study, some alloy steels were tested using the high-temperature erosion test equipment, and the effects of the wear factors on the wear rates were investigated. At a relatively low temperature (300°C), using the predicting method reported in our previous study, the wear rates calculated from the hardness of the materials and the particles at room temperature were close to the experimental results. At a higher temperature (700°C), the wear rates of the materials were increased because the materials were more ductile and softer. The wear rates calculated from the hardness at high temperature, using the same predicting method, were relatively close to the experimental results when the hardness of the materials at high temperature, data which are not obtained easily, were estimated on the assumption that the hardness is proportional to the tensile strength.