Iron-Nickel-Cobalt Alloy

Abstract

Use of an iron-nickel-cobalt alloy in CFC mould construction comprising (in % by mass) Ni from 30 to 35%, Co from 3 to 6%, Al from 0.001 to 0.1%, Mn from 0.005 to 0.5%, Si from 0.005 to 0.5%, C max. 0.1%, balance Fe and constituents resulting from production, with the alloy having a mean coefficient of thermal expansion in the temperature range from 20 to 200 DEG C of <2.0 OE10<−6>/K.

1 . A method comprising fabricating a mold from materials comprising an iron-nickel-cobalt alloy and producing an object of carbon-fiber reinforced composite in the mold, the alloy comprising, in % by weight: 
     
       
         
               
               
               
             
                   
                   
               
                   
                 Ni 
                 30 to 35% 
               
                   
                 Co 
                 3 to 6% 
               
                   
                 Al 
                 0.001 to 0.1% 
               
                   
                 Mn 
                 0.005 to 0.5% 
               
                   
                 Si 
                 0.005 to 0.5% 
               
                   
                 C 
                 max. 0.1% 
               
                   
                   
               
           
              
             
             
              
              
              
              
              
              
              
             
          
         
       
     
     remainder Fe and impurities, the alloy having a mean thermal expansion coefficient of <2.0×10 −6 /K in a temperature range from 20 to 200° C. 
   
   
       2 . Method in accordance with  claim 1 , wherein the Ni content of the alloy is 32.0 to 34.5%, in % by weight. 
   
   
       3 . Method in accordance with  claim 1 , wherein the Ni content of the alloy is 32.5 to 33.5%, in % by weight. 
   
   
       4 . Method in accordance with  claim 1 , wherein the alloy comprises in % by weight: 
     
       
         
               
               
               
             
                   
                   
               
                   
                 Ni 
                 32.5 to 34.5% 
               
                   
                 Co 
                 >3.0 to 5.5% 
               
                   
                 Al 
                 0.001 to 0.5% 
               
                   
                 Mn 
                 0.005 to 0.1% 
               
                   
                 Si 
                 0.005 to 0.1% 
               
                   
                 C 
                 0.005 to 0.05% 
               
                   
                   
               
           
              
             
             
              
              
              
              
              
              
              
             
          
         
       
     
     remainder Fe and impurities, the alloy having a mean thermal expansion coefficient of <1.5×10 −6 /K in a temperature range from 20 to 200° C. 
   
   
       5 . Method in accordance with  claim 1 , wherein the alloy comprises the following maximum contents of the following elements, in % by weight: 
     
       
         
               
               
               
             
                   
                   
               
                   
                 Cr 
                 max. 0.1% 
               
                   
                 Mo 
                 max. 0.1% 
               
                   
                 Cu 
                 max. 0.1% 
               
                   
                 Ti 
                 max. 0.1% 
               
                   
                 Mg 
                 max. 0.005% 
               
                   
                 B 
                 max. 0.005% 
               
                   
                 N 
                 max. 0.006% 
               
                   
                 O 
                 max. 0.003% 
               
                   
                 S 
                 max. 0.005% 
               
                   
                 P 
                 max. 0.008% 
               
                   
                 Ca 
                 max. 0.005% 
               
                   
                 Zr 
                 max. 0.05% 
               
                   
                   
               
           
              
             
             
              
              
              
              
              
              
              
              
              
              
              
              
              
             
          
         
       
     
   
   
       6 . A method, comprising fabricating a mold from materials comprising an iron-nickel-cobalt alloy and producing an object of carbon-fiber reinforced composite in the mold, the alloy comprising, in % by weight: 
     
       
         
               
               
               
             
                   
                   
               
                   
                 Ni 
                 32.5 to 34.5% 
               
                   
                 Co 
                 >3.5 to <4.5% 
               
                   
                 Mo 
                 max. 0.05% 
               
                   
                 Cr 
                 max. 0.05% 
               
                   
                 C 
                 max. 0.009% 
               
                   
                 Mn 
                 max. 0.04% 
               
                   
                 Si 
                 max. 0.03% 
               
                   
                 S 
                 max. 0.003% 
               
                   
                 N 
                 max. 0.004% 
               
                   
                 Ti 
                 max. 0.01% 
               
                   
                 Cu 
                 max. 0.05% 
               
                   
                 P 
                 max. 0.005% 
               
                   
                 Al 
                 0.001 to 0.05% 
               
                   
                 Mg 
                 max. 0.0008% 
               
                   
                 Ca 
                 max. 0.0003% 
               
                   
                 Zr 
                 max. 0.05% 
               
                   
                 O 
                 max. 0.006% 
               
                   
                   
               
           
              
             
             
              
              
              
              
              
              
              
              
              
              
              
              
              
              
              
              
              
              
             
          
         
       
     
     remainder Fe and impurities, the alloy having a mean thermal expansion coefficient of <1.3×10 −6 /K in a temperature range from 20 to 200° C. 
   
   
       7 . Method in accordance with  claim 1  or  4 , wherein the alloy further comprises 0.001 to 0.1%, in % by weight, Nb. 
   
   
       8 . Method in accordance with  claim 1  or  4 , wherein the alloy from which the mold is fabricated comprises sheet material, strip material, or tube material. 
   
   
       9 . Method in accordance with  claim 1  or  4 , wherein the alloy from which the mold is fabricated comprises wire and the fabricating of the mold comprises welding with the wire comprised of the alloy. 
   
   
       10 . Method in accordance with  claim 1  or  4 , wherein the object comprises an aircraft part. 
   
   
       11 . Method in accordance with  claim 1  or  4 , wherein the alloy from which the mold is fabricated is in the form of forged stock. 
   
   
       12 . Method in accordance with  claim 1  or  4 , wherein the alloy from which the mold is fabricated is in the form of cast stock.