Abstract
Surface damage caused by the impact of dispersed particles in gas or liquid flow is called “erosion”. Much attention has paid to this phenomenon as a serious problem, particularly at the pipe-bends or valves in pneumatic conveying system. The erosive wear is complicated, and its behavior changes depending on the factors of not only the kinds of material, hardness, shape, size and mechanical properties of the particles but the blasting angles and velocity.The purpose of this study, mild steel was prepared and erosion wear test was carried out using steel grits at different impact angle. It was found that the wear losses varied markedly by changing the impact angle, and showed the maximum wear in especial angles. They were 20 to 30 deg. for mild steel, 60 deg. for ductile iron. This impact angle dependence on the wear was simulated by the Tabor theory and FEM that could analyze the plastic deformation of alloy surface as a single particle collision. In the case of mild steel and ductile cast iron, the impact angles
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