SPRAY POWDER FOR PRODUCING WEAR-RESISTANT COATINGS ON SURFACES OF PISTON RINGS OR LINEAR SEALS

摘要

1. A spray powder containing molybdenum and aluminum for the manufacture of coatings, which are resistant to wear, to burning traces and to outbreaks, on the bearing faces of piston rings or sealing strips in internal combustion engines using a thermal spray or deposition welding process in which the spray powder comprises a) 60 to about 97 parts by weight of a first component A whose major constituent is molybdenum to which are mixed or alloyed in an amount of up to about 50 % by weight cobalt, chromium, iron, copper and/or tungsten and b) 3 to about 40 parts by weight of a second component B whose major constituent is aluminum to which are mixed or alloyed in an amount of up to about 50 % by weight silicon, copper, zinc and/or magnesium, said remaining elements each comprising up to at least 25 % by weight of the second component B.