Fe-Al ALLOY PRODUCTION METHOD

Abstract

A method for producing Fe—Al alloy includes: ingot-producing by casting Fe—Al alloy and taking out the Fe—Al alloy from a mold to obtain an ingot, the Fe—Al alloy containing Al: 2.0 to 9.0 mass % and a balance of Fe and impurities; hot-forging the ingot to form a hot-forged material; hot-rolling the hot-forged material to form a hot-rolled material; oxide-film removing by removing an oxide film of the hot-rolled material to form a material for cold rolling; cold-rolling the material for cold rolling to form a cold-rolled material; and annealing the cold-rolled material. Heating of the ingot in the hot-forging starts before a surface temperature of the ingot taken out from the mold is cooled to less than 250° C. in the ingot-producing.

What is claimed: 
     
         1 . A method for producing Fe—Al alloy, comprising:
 ingot-producing by casting Fe—Al alloy and taking out the Fe—Al alloy from a mold to obtain an ingot, the Fe—Al alloy containing Al: 2.0 to 9.0 mass % and a balance of Fe and impurities; 
 hot-forging the ingot to form a hot-forged material; 
 hot-rolling the hot-forged material to form a hot-rolled material; 
 oxide-film removing by removing an oxide film of the hot-rolled material to form a material for cold rolling; 
 cold-rolling the material for cold rolling to form a cold-rolled material; and 
 annealing the cold-rolled material, wherein 
 heating of the ingot in the hot-forging starts before a surface temperature of the ingot taken out from the mold is cooled to less than 250° C. in the ingot-producing. 
 
     
     
         2 . The method for producing Fe—Al alloy according to  claim 1 , wherein
 the Fe—Al alloy further contains Nb of 1.0 mass % or less. 
 
     
     
         3 . The method for producing Fe—Al alloy according to  claim 1 , wherein
 ingot surface removing by removing an oxide film of the ingot surface is performed before cooling the surface temperature of the ingot obtained by the ingot-producing to less than 250° C., and 
 subsequently proceeding to the hot-forging. 
 
     
     
         4 . The method for producing Fe—Al alloy according to  claim 1 , wherein
 the annealing is performed in non-oxidizing gas atmosphere. 
 
     
     
         5 . The method for producing Fe—Al alloy according to  claim 2 , wherein
 ingot surface removing by removing an oxide film of the ingot surface is performed before cooling the surface temperature of the ingot obtained by the ingot-producing to less than 250° C., and 
 subsequently proceeding to the hot-forging. 
 
     
     
         6 . The method for producing Fe—Al alloy according to  claim 2 , wherein
 the annealing is performed in non-oxidizing gas atmosphere. 
 
     
     
         7 . The method for producing Fe—Al alloy according to  claim 3 , wherein
 the annealing is performed in non-oxidizing gas atmosphere.