Cobalt-free, galling and wear resistant austenitic stainless steel hard-facing alloy

Abstract

A strain-hardenable stainless steel alloy includes hard secondary phases dispersed in an austenitic primary phase, the alloy including 0.3-0.6% nitrogen by weight.

What is claimed is: 
     
         1 . A strain-hardenable stainless steel alloy comprising hard secondary phases dispersed in an austenitic primary phase, the alloy including 0.3-0.6% nitrogen by weight. 
     
     
         2 . The alloy of  claim 1 , wherein the nitrogen content of the alloy is 0.44-0.55% by weight. 
     
     
         3 . The alloy of  claim 1 , wherein the alloy consists essentially of, by weight: 21.0 to 27.0% chromium; 3.0 to 7.0% manganese; 2.0 to 6.0% nickel; 1.5 to 4.0% silicon; 1.0 to 5.0% molybdenum; 0.9 to 1.3% carbon; 0.3-0.6% nitrogen; the balance iron and impurities. 
     
     
         4 . The alloy of  claim 3 , wherein the alloy consists essentially of, by weight: 21.0 to 27.0% chromium; 3.0 to 7.0% manganese; 2.0 to 6.0% nickel; 1.5 to 4.0% silicon; 1.0 to 5.0% molybdenum; 0.9 to 1.3% carbon; 0.44-0.55% nitrogen; the balance iron and impurities. 
     
     
         5 . The alloy of  claim 4 , wherein the alloy consists essentially of, by weight: 25.73% chromium; 4.78% manganese; 4.37% nickel; 3.34% silicon; 2.04% molybdenum; 1.21% carbon; 0.46% nitrogen; the balance iron and impurities. 
     
     
         6 . The alloy of  claim 1 , wherein the hard phases comprise at least one of a carbide and a nitride. 
     
     
         7 . A hard-faced component, comprising:
 a metallic component having a component surface;   a layer of the hard-facing alloy according to  claim 1  applied to the component surface.   
     
     
         8 . The component according to  claim 7 , wherein the component is a valve seat.