Aluminum alloy powder and production method thereof, and aluminum alloy extruded material and production method thereof

Abstract

An aluminum alloy powder consists of Fe: 5.0 mass % to 9.0 mass %, V: 0.1 mass % to 3.0 mass %, Mo: 0.1 mass % to 3.0 mass %, Zr: 0.1 mass % to 2.0 mass %, Ti: 0.02 mass % to 2.0 mass %, and the balance being Al and inevitable impurities. The aluminum alloy powder contains an Al—Fe based intermetallic compound. An average circle equivalent diameter of the Al—Fe based intermetallic compound is in a range of 0.1 μm to 3.0 μm in a cross-sectional structure of the aluminum alloy powder. An aluminum alloy extruded material excellent in mechanical properties at high temperature is provided.

1 . An aluminum alloy powder consisting of Fe: 5.0 mass % to 9.0 mass %, V: 0.1 mass % to 3.0 mass %, Mo: 0.1 mass % to 3.0 mass %, Zr: 0.1 mass % to 2.0 mass %, Ti: 0.02 mass % to 2.0 mass %, and the balance being Al and inevitable impurities,
 wherein the aluminum alloy powder contains an Al—Fe based intermetallic compound, and   wherein an average circle equivalent diameter of the Al—Fe based intermetallic compound is in a range of 0.1 μm to 3.0 μm in a cross-sectional structure of the aluminum alloy powder.   
     
     
         2 . The aluminum alloy powder as recited in  claim 1 , further consisting of 0.0001 mass % to 0.03 mass % of B. 
     
     
         3 . A production method of an aluminum alloy powder, comprising:
 quench-solidifying a molten metal of an aluminum alloy by an atomizing method into powder to obtain an aluminum alloy powder,   wherein the aluminum alloy consists of Fe: 5.0 mass % to 9.0 mass %, V: 0.1 mass % to 3.0 mass %, Mo: 0.1 mass % to 3.0 mass %, Zr: 0.1 mass % to 2.0 mass %, Ti: 0.02 mass % to 2.0 mass %, and the balance being Al and inevitable impurities.   
     
     
         4 . An aluminum alloy extruded material consisting of Fe: 5.0 mass % to 9.0 mass %, V: 0.1 mass % to 3.0 mass %, Mo: 0.1 mass % to 3.0 mass %, Zr: 0.1 mass % to 2.0 mass %, Ti: 0.02 mass % to 2.0 mass %, and the balance being Al and inevitable impurities,
 wherein the aluminum alloy extruded material contains an Al—Fe based intermetallic compound, and   wherein an average circle equivalent diameter of the Al—Fe based intermetallic compound is in a range of 0.1 μm to 3.0 μm in a cross-sectional structure of the aluminum alloy extruded material.   
     
     
         5 . The aluminum alloy extruded material as recited in  claim 4 ,
 wherein the aluminum alloy extruded material further contains 0.0001 mass % to 0.03 mass % of B.   
     
     
         6 . The aluminum alloy extruded material as recited in  claim 4 ,
 wherein the intermetallic compound is an Al—Fe—V—Mo based intermetallic compound containing at least Al, Fe, V, and Mo, and   wherein in the intermetallic compound, a content rate of Al is 81.60 mass % to 92.37 mass %, a content rate of Fe is 2.58 mass % to 10.05 mass %, a content rate of V is 1.44 mass % to 4.39 mass %, and a content rate of Mo is 2.45 mass % to 3.62 mass %.   
     
     
         7 . The aluminum alloy extruded material as recited in  claim 5 ,
 wherein the intermetallic compound is an Al—Fe—V—Mo based intermetallic compound containing at least Al, Fe, V, and Mo, and   wherein in the intermetallic compound, a content rate of Al is 81.60 mass % to 92.37 mass %, a content rate of Fe is 2.58 mass % to 10.05 mass %, a content rate of V is 1.44 mass % to 4.39 mass %, and a content rate of Mo is 2.45 mass % to 3.62 mass %.   
     
     
         8 . A production method of an aluminum alloy extruded material, comprising:
 a compression molding step of compression molding the aluminum alloy powder recited in  claim 1  to obtain a green compact; and   an extrusion step of hot extruding the green compact to obtain an extruded material,   wherein the extruded material contains an Al—Fe based intermetallic compound in the extruded material, and   wherein in a cross-sectional structure of the extruded material, an average circle equivalent diameter of the Al—Fe based intermetallic compound is in a range of 0.1 μm to 3.0 μm.   
     
     
         9 . A production method of an aluminum alloy extruded material, comprising:
 a compression molding step of compression molding the aluminum alloy powder recited in  claim 2  to obtain a green compact; and   an extrusion step of hot extruding the green compact to obtain an extruded material,   wherein the extruded material contains an Al—Fe based intermetallic compound in the extruded material, and   wherein in a cross-sectional structure of the extruded material, an average circle equivalent diameter of the Al—Fe based intermetallic compound is in a range of 0.1 μm to 3.0 μm.