Effect of microstructure and mechanical properties on the erosion of 18 Ni (250) maraging steel

摘要: Abstract Specimens of 18 Ni (250) maraging steel were solution treated and aged at 480, 590 650 °C for varying times up to a maximum 24 h. Solutionannealed specimens also cold rolled amounts. The erosion behavior these was studied in sand-blast type test rig. tests conducted under ambient conditions with 125 μm angular SiC particles impacted velocity 50 m s −1 an angle 30° the specimen surface. variation has been related microstructural changes which occur during aging involve precipitation, reversion austenite precipitate particle growth. It respect mechanical properties. found that rate depends on both hardness ductility. varies directly when ductility remains constant it inversely square per cent area reduction constant. Scanning electron microscopy eroded surfaces debris revealed accompanied by large amount plastic deformation form small flakes. flakes detached because combination cutting, ploughing crack propagation mechanisms.