Aluminum alloy material and method for producing same

Abstract

An aluminum alloy material having excellent high-temperature creep strength and a method for producing the aluminum alloy material. The aluminum alloy material has an alloy composition that includes 1.5-6.0 mass % of Cu, 1.0-4.0 mass % of Mg, 0.5-2.0 mass % of Fe, 0.5-2.0 mass % of Ni, 0.1-3.0 mass % of Si, 0.05-0.7 mass % of Mo, 0.01-0.3 mass % of Ti, and a remainder of Al and incidental impurities.

1 . An aluminum alloy material comprising an alloy composition containing:
 Cu: 1.5% to 6.0% by mass,   Mg: 1.0% to 4.0% by mass,   Fe: 0.5% to 2.0% by mass,   Ni: 0.5% to 2.0% by mass,   Si: 0.1% to 3.0% by mass,   Mo: 0.05% to 0.7% by mass,   Ti: 0.01% to 0.3% by mass, and   Al.   
     
     
         2 . An aluminum alloy material comprising an alloy composition containing:
 Cu: 1.9% to 3.0% by mass,   Mg: 1.3% to 3.0% by mass,   Fe: 0.9% to 1.3% by mass,   Ni: 0.9% to 1.3% by mass,   Si: 0.25% to 0.8% by mass,   Mo: 0.05% to 0.5% by mass,   Ti: 0.04% to 0.09% by mass, and   Al.   
     
     
         3 . The aluminum alloy material according to  claim 1 , wherein contents of the Si and the Mo are
 Si: 0.1% to 0.6% by mass, and   Mo: 0.3% to 0.7% by mass.   
     
     
         4 . The aluminum alloy material according to  claim 1 , wherein contents of the Si and the Mo are
 Si: 0.35% to 0.8% by mass, and   Mo: 0.05% to 0.55% by mass.   
     
     
         5 . The aluminum alloy material according to  claim 1 , wherein the aluminum alloy material has a minimum creep rate of 8.5×10 −10 /sec or less at 160° C. and 250 MPa. 
     
     
         6 . A method for producing the aluminum alloy material having the alloy composition according to  claim 1 , the method comprising performing melt-adjustment of a molten metal having the alloy composition, casting, homogenization treatment, hot working, solution treatment, quenching, and aging treatment in this order. 
     
     
         7 . The aluminum alloy material according to  claim 2 , wherein contents of the Si and the Mo are
 Si: 0.1% to 0.6% by mass, and   Mo: 0.3% to 0.7% by mass.   
     
     
         8 . The aluminum alloy material according to  claim 2 , wherein contents of the Si and the Mo are
 Si: 0.35% to 0.8% by mass, and   Mo: 0.05% to 0.55% by mass.   
     
     
         9 . The aluminum alloy material according to  claim 2 , wherein the aluminum alloy material has a minimum creep rate of 8.5×10 −10 /sec or less at 160° C. and 250 MPa. 
     
     
         10 . A method for producing the aluminum alloy material having the alloy composition according to  claim 2 , the method comprising performing melt-adjustment of a molten metal having the alloy composition, casting, homogenization treatment, hot working, solution treatment, quenching, and aging treatment in this order.