Co-based water-atomised powder composition for die compaction

Abstract

The present invention concerns a powder metal composition for producing powder metal components comprising a Co-based pre-alloyed powder, with irregularly shaped particles comprising at least 15% by weight Cr and less than 0.3% by weight C, admixed with graphite. The invention also concerns a method for producing PM components by pressing of articles to shape from the powder metal composition according to the invention and sintering them.

1 - 13 . (canceled)  
     
     
         14 . A Co-based water-atomised prealloyed powder for die compaction, said powder having irregularly shaped particles and comprising at least 15% by weight Cr and less than 0.1% by weight C.  
     
     
         15 . A Co-based water-atomised pre-alloyed powder for die compaction, said powder having irregularly shaped particles and consisting of: 15-35% by weight Cr, 0-20% by weight W, 0-25% by weight Ni, 0-5% by weight Si, 0-5% by weight Fe, 0-10% by weight Mo, less than 0.1% C and the balance being Co.  
     
     
         16 . A Co-based water-atomised pre-alloyed powder for die compaction, said powder having irregularly shaped particles and consisting of: 15-35% by weight Cr, 0-20% by weight W, 0-25% by weight Ni, 0-5% by weight Si, 0-5% by weight Fe, 0-10% by weight Mo, less than 0.05% C and the balance being Co.