NI-BASE COMPOSITE MATERIAL EXCELLENT IN WEAR RESISTANCE AND CORROSION RESISTANCE AND ITS PRODUCTION

摘要

PURPOSE:To obtain a composite member excellent in corrosion resistance as well as wear resistance by blending each powder of SiC, C and Ni, compacting the mixture, presintering the green compact and then subjecting the resulting presintered compact to recompacting and resintering. CONSTITUTION:The powdered SiC (5-35wt%), powdered C (3-10wt%) and powdered Ni (55-92wt%) are uniformly blended and the resulting mixture is compacted at a pressure of 3-7 ton/cm2. The green compact is presintered at 400-600 deg.C. Subsequently, the presintered compact is recompacted at a pressure of 7-9 ton/cm2 and then resintered at 800-900 deg.C. In this way, an Ni-base composite material excellent in wear resistance even in an oil free state and also having superior corrosion resistance even in an atmosphere containing water can be stably manufactured.