Einfluss der korngrösse auf das strahlverschleissverhalten von metall und nichtmetallischen hartstoffen

Abrasion of materials, steel St 37, C60H and sintercorund in the form of plates at different angles in a sand blasting apparatus with corund particles of 1000, 100 and 10 μm size at a velocity of 130 m/s shows that with diminishing grain size, maximum wear occurs at lower angles. With artificial basalt under similar conditions, maximum wear always occurs at an angle of 90°. The results are explained by an increase of elastic and plastic absorption of energy with decrease of fracture energy. At low strain, the materials probably absorb energy by microplastic deformation. The results show that the transformed energy at the impact of a single particle is of importance.