Austenite alloy, blank and component, and method

Abstract

An alloy, including at least (in wt. %): carbon (C) 0.03%-0.08%, silicon (Si) 0.2%-0.4%, manganese (Mn) 1.6%-2.0%, molybdenum (Mo) 4.0%-5.0%, chromium (Cr) 20.0%-25.0%, nickel (Ni) 24.0%-27.0%, vanadium (V) 0.25%-0.35%, titanium (Ti) 2.0%-2.3%, aluminum (Al) 0.4%-0.6%, boron (B) 0.004%-0.006%, iron (Fe).

1 . An alloy at least comprising (in % by weight): 
       
         
           
                 
                 
               
                     
                 
                   carbon (C) 
                   0.03%-0.08% 
                 
                   silicon (Si) 
                   0.2%-0.4% 
                 
                   manganese (Mn) 
                   1.6%-2.0% 
                 
                   molybdenum (Mo) 
                   4.0%-5.0% 
                 
                   chromium (Cr) 
                   20.0%-25.0%, more particularly 21.5%-23.5%, 
                 
                   nickel (Ni) 
                   24.0%-27.0%, more particularly 25.0%-26.0%, 
                 
                   vanadium (V) 
                   0.25%-0.35% 
                 
                   titanium (Ti) 
                   2.0%-2.3% 
                 
                   aluminum (Al) 
                   to 0.6% 
                 
                   iron (Fe), more particularly balance 
                 
                   iron (Fe), optionally 
                 
                   boron (B) 
                   0.004%-0.006% 
                 
                   tungsten (W) 
                   to 2.5%, more particularly 1.8%-2.2%, 
                 
                   niobium (Nb): 
                   to 1.5%, more particularly 1.0%-1.2%, 
                 
                   nitrogen (N) 
                   to 0.005% 
                 
                   phosphorus (P) 
                   to 0.03%, more particularly to 0.025%, 
                 
                   sulfur (S) 
                   to 0.02%, more particularly to 0.015%. 
                 
                     
                 
             
                
               
               
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
               
            
           
         
       
     
     
         2 . The alloy as claimed in  claim 1 , comprising:
 one, more particularly two, very especially comprising all of the elements from the following group:   boron (B), tungsten (W) and niobium (Nb).   
     
     
         3 . The alloy as claimed in  claim 1 , comprising:
 0.4% to 0.6% of aluminum (Al).   
     
     
         4 . The alloy as claimed in  claim 1 , comprising:
 up to 0.06% of aluminum (Al),   more particularly up to 0.01% of aluminum (Al),   very especially 0.004%-0.006% of aluminum (Al).   
     
     
         5 . The alloy as claimed in  claim 1 , having
 a value: % Cr+3.3% Mo≥32.   
     
     
         6 . A blank or component, comprising:
 an alloy as claimed in  claim 1 .   
     
     
         7 . A method for the heat treatment of an alloy, a blank or a component as claimed in  claim 1 , comprising:
 solution annealing for the heat treatment,   more particularly single solution annealing and tempering at least twice,   more particularly tempering only twice.   
     
     
         8 . The method as claimed in  claim 7 ,
 in which a solution annealing takes place at at least 1243 K,   more particularly at 1243 K.   
     
     
         9 . The method as claimed in  claim 7 ,
 in which a first tempering takes place at a temperature of at least 100 K below the solution annealing,   more particularly at at least 1013 K,   very especially at 1013 K.   
     
     
         10 . The method as claimed in  claim 7 ,
 in which a first tempering takes place at a temperature of at least 100 K below the solution annealing,   more particularly at at least 973 K,   very especially at 973 K.   
     
     
         11 . The method as claimed in  claim 9 ,
 in which a second tempering temperature is at least 20 K lower than the first tempering temperature.   
     
     
         12 . The method as claimed in  claim 11 ,
 in which a second tempering temperature is at least 923 K,   more particularly 923 K.   
     
     
         13 . The method as claimed in  claim 11 ,
 in which a third tempering temperature is not higher than the second tempering temperature.   
     
     
         14 . The method as claimed in  claim 13 ,
 in which a third tempering temperature is at least 923 K,   more particularly 923 K.   
     
     
         15 . The method as claimed in  claim 7 ,
 by means of solution annealing and only triple tempering.   
     
     
         16 . An alloy consisting of (in % by weight)
 elements as claimed in  claim 1 .