Erosion is a phenomenon that damage the surface of material is removed by the particles impact. Erosive wear becomes a problem in pulverized coal injection system and rotating chute. In order to reach an aim of high safety and low cost, it's important to develop wear resistant material and to estimate of life service during erosion. According to research pertaining to erosion, three types of conditions are known to affect. Particle's condition is hardness and particle shape. Impact condition is angle and velocity. Target material's condition is mechanical properties and structure. This study investigated that impact angle dependently on erosive wear by Finite-element-method (FEM). LS-DYNA suitable for contact problems was used in this study. Analysis conditions are shown below of specimens. Impact velocity of the particles was 20m/s. The contact time of the collision is 0.01ms. The dimensions of the impact material are 10 x 10 x 10mm. Test specimen was SUS630 stainless steel. The erodent particle used in this study was a 1mm alumina ball. Impact angle was analyzed from lOdeg. to 90deg. The particle was assumed to be rigid. The elastic constants of SUS stainless steel were used to define the particle material. For verification of the analysis result, a single impact experiments were conducted. The Correlation was obtained in result of experiment and analysis. As a result of focused on equivalent plastic strain and Mises stress. It's possible to test the efficacy of FEM analysis of impact angle dependency for high temperature erosive wear.
