Tungsten alloy high temperature tool materials

Abstract

A tungsten alloy tool includes, in weight %, 3% to 27% rhenium, 0.03% to 3% hafnium, and 0.002% to 0.2% carbon, balance tungsten.

1 . A tungsten alloy tool comprising a composition which comprises, in weight %, 3% to 27% rhenium, 0.03% to 3% hafnium, and 0.002% to 0.2% carbon, balance tungsten, said composition being formed into a tool.  
     
     
         2 . A tungsten alloy tool in accordance with  claim 1  wherein said hafnium and said carbon are present in an atomic ratio of about 1 to 1.  
     
     
         3 . A tungsten alloy tool in accordance with  claim 1  further comprising 26% rhenium, 0.28% hafnium, and 0.02% carbon.  
     
     
         4 . A tungsten alloy tool in accordance with  claim 1  further comprising a surface layer comprised of another material disposed thereon.  
     
     
         5 . A tungsten alloy tool in accordance with  claim 4  further wherein said surface layer further comprises at least one material selected from the group consisting of: boron carbide, hafnium carbide, titanium carbide, niobium carbide, tantalum carbide, zirconium carbide, boron nitride, hafnium nitride, titanium nitride, niobium nitride, tantalum nitride, zirconium nitride, aluminum oxide, and hafnium oxide.  
     
     
         6 . A tungsten alloy tool comprising a substrate formed into a tool, said substrate having thereon an alloy surface layer comprising, in weight %, 3% to 27% rhenium, 0.03% to 3% hafnium, and 0.002% to 0.2% carbon, balance tungsten.  
     
     
         7 . A tungsten alloy tool in accordance with  claim 6  wherein said hafnium and said carbon are present in an atomic ratio of about 1 to 1.  
     
     
         8 . A tungsten alloy tool in accordance with  claim 6  wherein said surface layer further comprises 26% rhenium, 0.28% hafnium, and 0.02% carbon.  
     
     
         9 . A tungsten alloy tool in accordance with  claim 6  further comprising a further surface layer comprised of another material disposed thereon.  
     
     
         10 . A tungsten alloy tool in accordance with  claim 9  further wherein said further surface layer further comprises at least one material selected from the group consisting of: boron carbide, hafnium carbide, titanium carbide, niobium carbide, tantalum carbide, zirconium carbide, boron nitride, hafnium nitride, titanium nitride, niobium nitride, tantalum nitride, zirconium nitride, aluminum oxide, and hafnium oxide.