Impact Angle Dependence of Erosive Wear for Spheroidal Carbide Cast Iron

Abstract

Erosive wear (or erosion) is a phenomenon where the material surface is damaged and removed by the continuously impacting of particles. According to researches on erosion, three types of parameters affect erosion, namely, particle properties, impacting condition, and target material properties.This study investigated the impact angle dependence of erosion by 3D Finite-Element-Method (FEM).In the FEM analysis, the velocity of impact particles was set as 20 m/s and the analysis duration was 0.01 ms. The size of the target material was 10 × 10 × 10 mm. The parameters of the target materials were set same as spheroidal carbide cast iron (SCI) and spheroidal graphite cast iron (FCD). The impact particle was spherical shaped steel grits with a diameter of 700 μm. The impact angle was changed from 10 degree with a 10 degree interval, up to 90 degree. To verify the analytical results, single particle impact tests was conducted at the same time.The results showed no difference in the equivalent plastic strain and Von Mises stress for spheroidal carbide cast iron with increasing impact angle, respectively. Both the equivalent plastic strain and Von Mises stress of FCD were largest around 60 80 degree. In addition, both the experimental and analytical results of the materials showed the same tendency. Therefore, by focusing on the plastic deformation of the material surface, it is possible to verify impact angle of dependence by 3D FEM analysis. The results of analysis indicate that spherical carbides can restrain the plastic deformation of the eroded surface. [Fig. 1 3D model. (a) Appearance of 3D model, (b) Cross sectional view of 3D model.