Machine component with a cavitation resistant coating

Abstract

A machine component may include a body made of an iron alloy. The body may include a surface, and a coating fused to the surface. The coating may be an alloy including phosphorous, carbon, and iron. The coating may have solidus temperature of less than or equal to about 1000° C., and a hardness greater than or equal to about 50 HRC.

1 - 10 . (canceled) 
     
     
         11 . A method of forming a cavitation-resistant coating on a surface of a machine component, comprising:
 preparing the surface of the component for coating;   applying a coating including phosphorous, carbon, and iron to the surface;   heating the surface to at least partially melt the applied coating at a temperature less than or equal to about 1000° C.; and   cooling the at least partially melted coating to fuse the coating to the surface, the fused coating having a hardness greater than or equal to about 50 HRC.   
     
     
         12 . The method of  claim 11 , wherein cooling the at least partially melted coating includes cooling the coating to ambient temperature at cooling rate of less than or equal to about 10° C./sec. 
     
     
         13 . The method of  claim 11 , wherein applying the coating includes applying a coating including about 4-12% by weight of phosphorous, and about 0.5-3.5% by weight of carbon to the surface. 
     
     
         14 . The method of  claim 13 , wherein the coating further includes copper between about 0.1-15% by weight. 
     
     
         15 . The method of  claim 13 , wherein the coating further includes at least one of boron less than or equal to 1% by weight, silicon less than or equal to about 3% by weight, manganese between about 0.1-5% by weight, nickel less than or equal to about 5% by weight, chromium between about 0.1-15% by weight, molybdenum less than or equal to about 11% by weight, and vanadium less than or equal to 6% by weight. 
     
     
         16 . The method of  claim 11 , wherein applying the coating includes applying a coating including about 7-9% by weight of phosphorous, and about 1.5-2.5% by weight of carbon. 
     
     
         17 - 20 . (canceled)