Austenitic nickel/chrome/cobalt/molybdenum/tungsten alloy and use thereof

Abstract

The invention relates to an austenitic nickel/chrome/cobalt/molybdenum/tungsten alloy, comprising (in mass %): carbon: 0.05 to 0.10%; chromium: 21 to 23%; cobalt: 10 to 15%; molybdenum: 10 to 11%; aluminium: 1.0 to 1.5%; tungsten: 5.1 to 8.0%; yttrium: 0.01 to 0.10%; boron: 0.001 to 0.010%; titanium: max. 0.50%; silicon: max. 0.50%; iron: max. 2%; manganese: max. 0.5%; nickel: remainder; including unavoidable impurities caused by the smelting process.

1 . Austenitic nickel-chrome-cobalt-molybdenum-tungsten alloy consisting of (in % by mass):  
       
         
           
                 
                 
                 
                 
               
                     
                     
                 
                     
                     
                 
                     
                   carbon: 
                   0.05 to 0.10% 
                     
                 
                     
                   chrome: 
                   21 to 23% 
                 
                     
                   cobalt: 
                   10 to 15% 
                 
                     
                   molybdenum: 
                   10 to 11% 
                 
                     
                   aluminium: 
                   1.0 to 1.5% 
                 
                     
                   tungsten: 
                   5.1 to 8.0% 
                 
                     
                   yttrium: 
                   0.01 to 0.10% 
                 
                     
                   boron: 
                   0.001 to 0.010% 
                 
                     
                   titanium: 
                   max. 0.50% 
                 
                     
                   silicium: 
                   max. 0.50% 
                 
                     
                   iron: 
                   max. 2% 
                 
                     
                   manganese: 
                   max. 0.5% 
                 
                     
                   nickel: 
                   remainder 
                 
                     
                     
                 
                     
                     
                 
             
                
                
               
               
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
               
            
           
         
       
       including unavoidable impurities caused by the smelting process.  
     
     
         2 . Austenitic nickel-chrome-cobalt-molybdenum-tungsten alloy consisting of (in % by mass):  
       
         
           
                 
                 
                 
                 
               
                     
                     
                 
                     
                     
                 
                     
                   carbon: 
                   0.05 to 0.10% 
                     
                 
                     
                   chrome: 
                   21 to 23% 
                 
                     
                   cobalt: 
                   12 to 13% 
                 
                     
                   molybdenum: 
                   10 to 11% 
                 
                     
                   aluminium: 
                   1.0 to 1.5% 
                 
                     
                   tungsten: 
                   5.1 to 7.0% 
                 
                     
                   yttrium: 
                   0.04 to 0.07% 
                 
                     
                   boron: 
                   0.001 to 0.005% 
                 
                     
                   titanium: 
                   max. 0.50% 
                 
                     
                   silicium: 
                   max. 0.50% 
                 
                     
                   iron: 
                   max. 2% 
                 
                     
                   manganese: 
                   max. 0.5% 
                 
                     
                   nickel: 
                   remainder 
                 
                     
                     
                 
                     
                     
                 
             
                
                
               
               
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
               
            
           
         
       
       including unavoidable impurities caused by the smelting process.  
     
     
         3 . Use of an austenitic nickel-chrome-cobalt-molybdenum-tungsten alloy according to  claim 1  or  2 , in particular for combustion chambers of stationary or flying gas turbines.  
     
     
         4 . Use of an austenitic nickel-chrome-cobalt-molybdenum-tungsten alloy according to  claim 1  or  2 , in particular for compressors and turbo-superchargers of combustion engines.  
     
     
         5 . Use of an austenitic nickel-chrome-cobalt-molybdenum-tungsten alloy according to  claim 1  or  2 , in particular for steam turbines.  
     
     
         6 . Use of an austenitic nickel-chrome-cobalt-molybdenum-tungsten alloy according to  claim 1  or  2 , in particular for shafts, roots and blades of high temperature ventilators.  
     
     
         7 . Use of an austenitic nickel-chrome-cobalt-molybdenum-tungsten alloy according to  claim 1  or  2  for gas and steam turbine power stations, in particular combustion chamber walls, blades, tubes, boiler walls, membrane walls, collectors or the like.