An object comprising a pre-oxidized nickel-based alloy

Abstract

The present application relates to an object comprising a pre-oxidized nickel based alloy comprising in percent by weight (wt-%) C 0.05-0.2; Si max 1.5; Mn max 0.5; Cr 15-20; Al 4-6; Fe 15-25; Co max 5; N 0.03-0.15; O max 0.5; one or more elements selected from the group consisting of Ta, Zr, Hf, Ti and Nb 0.25-2.2; one or more elements selected from the group consisting of REM max 0.5; balance Ni and normally occurring impurities an also to the use of said object wherein the use is in an environment comprised of high concentration of nitrogen, low partial pressure of oxygen and high temperature.

1 . An object comprising a pre-oxidized nickel based alloy comprising in percent by weight (wt-%) 
       
         
           
                 
                 
                 
               
                     
                     
                 
                     
                   C 
                   0.05-0.2; 
                 
                     
                   Si 
                   max 1.5; 
                 
                     
                   Mn 
                   max 0.5; 
                 
                     
                   Cr 
                     15-20; 
                 
                     
                   Al 
                     4-6; 
                 
                     
                   Fe 
                     15-25; 
                 
                     
                   Co 
                   max 5; 
                 
                     
                   N 
                   0.03-0.15; 
                 
                     
                   O 
                   max 0.5; 
                 
                     
                     
                 
             
                
               
               
                
                
                
                
                
                
                
                
                
                
               
            
           
         
         one or more elements selected from the group consisting of Ta, Zr, Hf, Ti and Nb 0.25-2.2; 
         one or more elements selected from the group consisting of REM max 0.5; 
         balance Ni and normally occurring impurities. 
       
     
     
         2 . The object according to  claim 1 , wherein the pre-oxidized nickel-based alloy comprises 16-21.5 wt-% Fe. 
     
     
         3 . The object according to  claim 1 , wherein the pre-oxidized nickel-based alloy comprises 17-20 wt-% Cr. 
     
     
         4 . The object according to  claim 1 , wherein the pre-oxidized nickel-based alloy comprises max 0.3 wt-% Si. 
     
     
         5 . The object according to  claim 1 , wherein the pre-oxidized nickel-based alloy comprises max 1 wt-% Co. 
     
     
         6 . The object according to  claim 1 , wherein the pre-oxidized nickel-based alloy one or more elements selected from the group consisting of REM in a total content of 0.05-0.25 wt-%. 
     
     
         7 . The object according to  claim 1 , wherein the pre-oxidized nickel-based alloy comprises one or more elements selected from the group consisting of Ta, Zr, Hf, Ti and Nb in a total content of 0.3-1.5 wt-%. 
     
     
         8 . The object according to  claim 1 , wherein the pre-oxidized nickel-based alloy comprises >4-5.5 wt-% Al. 
     
     
         9 . The object according to  claim 1 , wherein the pre-oxidized nickel-based alloy comprises 200-2000 ppm O. 
     
     
         10 . The object according to  claim 1 , wherein the pre-oxidized nickel-based alloy comprises 52-62 wt-% Ni. 
     
     
         11 . The object according to  claim 1 , wherein the pre-oxidized nickel-based alloy is oxidized before use. 
     
     
         12 . Manufacture of an object comprising the pre-oxidized nickel-based alloy according to  claim 1 , wherein said manufacture comprises a step of preoxidation. 
     
     
         13 . Use of an object comprising the pre-oxidized nickel-based alloy according to  claim 1 , wherein said use is in an atmosphere comprising a high concentration of nitrogen and a low oxygen partial pressure. 
     
     
         14 . The use according to  claim 13 , wherein said use also comprises a high temperature. 
     
     
         15 . The object according to  claim 2 , wherein the pre-oxidized nickel-based alloy comprises 17-20 wt-% Cr. 
     
     
         16 . The object according to  claim 1 , wherein the object is a mesh belt, a furnace roller, a radiation tube, a thermocouple protection tube, or a heating element.