Iron-chromium-aluminum alloy

Abstract

The invention relates to an iron-chromium-aluminum alloy having a good oxidation resistance, comprising (in % by mass) 2.5 to 5.0% Al, 10 to 25% Cr, 0.05 0.8% Si, and additions of >0.01 to 0.1% Y and/or >0.01 to 0.1% Hf and/or >0.01 to 0.2% Zr and/or >0.01 to 0.2% Cerium mischmetal (Ce, La, Nd) as well as production-associated impurities.

1 .- 19 . (canceled)  
   
   
       20 . Iron-chromium-aluminium alloy having good oxidation resistance, comprising, in % by weight, as follows: 
 2.5 to 5.0% Al;    10 to 25% Cr;    0.05-0.8% Si; and    >0.01 to 0.1% of a total weight of Y, Sc, Ti, Nd, Ta, V, and/or one or more rare earth metal elements; and/or    >0.01 to 0.1% of a total weight of Hf, Sc, Ti, Nd, Ta, V, and/or one or more rare earth metal elements; and/or    >0.01 to 0.2% of a total weight of Zr, Sc, Ti, Nd, Ta, V, and/or one or more rare earth metal elements; and/or    >0.01 to 0.2% of a total weight of Cerium mischmetal (Ce, La, Nd), Sc, Ti, Nd, Ta, V, and/or one or more rare earth metal elements, said Cerium mischmetal (Ce, La, Nd) comprising at least two of Ce, La, or Nd.    
   
   
       21 . The alloy in accordance with  claim 20 , comprising: 
 >0.01 to 0.1% Y and/or >0.01 to 0.1% Hf and/or >0.01 to 0.2% Zr and/or >0.01 to 0.2% Cerium mischmetal (Ce, La, Nd).    
   
   
       22 . The alloy in accordance with  claim 20 , comprising, in % by weight, 
 2.5 to <5% Al;    13 to 21% Cr;    >0.01 to 0.1% Y; and    >0.01 to 0.1% Hf.    
   
   
       23 . The alloy in accordance with  claim 20 , comprising, in % by weight, 
 2.5 to <5% Al;    13 to 21% Cr;    >0.01 to 0.1% Y;    >0.01 to 0.1% Hf; and    >0.01 to 0.2% Zr.    
   
   
       24 . The alloy in accordance with  claim 20 , comprising, in % by weight, 
 2.5 to 5% Al;    13 to 21% Cr; and    >0.01 to 0.2% Cerium mischmetal (Ce, La, Nd).    
   
   
       25 . The alloy in accordance with  claim 20 , comprising, in % by weight, 
 2.5 to 5% Al;    13 to 21% Cr;    >0.01 to 0.2% Zr; and    >0.01 to 0.2% Cerium mischmetal (Ce, La, Nd).    
   
   
       26 . The alloy in accordance with  claim 20 , comprising, in % by weight, 
 max. 0.06% C;    max. 0.6% Si;    max. 0.6% Mn;    max. 0.04% P;    max. 0.01% S;    max. 0.02% N;    max. 0.1% Ti; and    in total max. 0.5% Nb, Mo, Cu and/or W.    
   
   
       27 . The alloy in accordance with  claim 20 , comprising Sc, Ti, Nd, Ta, V and/or one or more rare earth metal elements.  
   
   
       28 . The alloy in accordance with  claim 20 , comprising, in % by weight, 
 Cr between 14 and 19%; and    Al between 2.5 and 4.5%, wherein 
 the total content, in % by weight, of Y, Hf, Zr, Cerium mischmetal (Ce, La, Nd), Sc, Ti, Nb, Ta, V and/or one or more rare earth metals does not exceed 0.6%.  
   
   
   
       29 . The alloy in accordance with  claim 28 , wherein, in % by weight, the Cr content is >17.5% and <19% and the Al content is >3% and <4%.  
   
   
       30 . The alloy in accordance with  claim 20 , wherein, in % by weight, the Y content is >0.02% and <0.08% and the Hf content is >0.02% and <0.06%.  
   
   
       31 . The alloy in accordance with  claim 20 , wherein said Cerium mischmetal (Ce, La, Nd) comprises Ce, La, and Nd.  
   
   
       32 . The alloy in accordance with  claim 21 , wherein said Cerium mischmetal (Ce, La, Nd) comprises Ce, La, and Nd.  
   
   
       33 . Components comprising the alloy in accordance with  claim 20 , wherein said components, after being annealed at 1100° C. for 400 h at a thickness of 50 μm, show a linear deformation of <4%.  
   
   
       34 . A method for the fabrication of semi-finished articles comprising the alloy in accordance with  claim 20 , comprising 
 melting the alloy; and    performing ingot casting, continuous casting or strip casting; and/or    hot and/or cold deformation; and/or    performing one or more intermediate annealing processes.    
   
   
       35 . A component in Diesel vehicles and two-stroke devices, said component comprising the alloy in accordance with  claim 20 .  
   
   
       36 . The component in accordance with  claim 35 , wherein said Diesel vehicles and two-stroke devices comprise Diesel and two-stroke engines.  
   
   
       37 . The component in accordance with  claim 36 , wherein said component is a substrate foil in metallic catalytic exhaust converters.  
   
   
       38 . Exhaust cleaning systems, comprising the component in accordance with  claim 36 , wherein said component is formed in a shape of a wire.  
   
   
       39 . Diesel engine glow cells comprising the component in accordance with  claim 36 .  
   
   
       40 . Components employed in exhaust systems of Diesel or two-stroke engines comprising a surface coating, said surface coating formed by applying said surface coating from a spraying wire comprising the alloy in accordance with  claim 20 .  
   
   
       41 . The component in accordance with  claim 36 , wherein said component is a heating conductor or resistance material for electrical preheating of exhaust cleaning systems of Diesel or two-stroke engines.  
   
   
       42 . Exhaust cleaning systems of fuel cells comprising a component comprising the alloy in accordance with  claim 20.