Aluminum alloy powder and method of producing the same, aluminum alloy extruded material and method of producing the same

Abstract

An aluminum alloy extruded material 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 %; one or two kinds of metals selected from the group consisting of Cr and Mn: 0.02 mass % to 2.0 mass %, respectively; and the balance being Al and inevitable impurities, wherein the aluminum alloy extruded material contains an Al—Fe based intermetallic compound, and wherein in a cross-sectional structure of the aluminum alloy 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. It is possible to provide an aluminum alloy extruded material excellent in mechanical properties at high temperature.

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 %; one or two kinds of metals selected from the group consisting of Cr and Mn: 0.02 mass % to 2.0 mass %, respectively; and the balance being Al and inevitable impurities,
 wherein the aluminum alloy powder contains an Al—Fe based intermetallic compound, and   wherein in a cross-sectional structure of the aluminum alloy powder, an average circle equivalent diameter of the Al—Fe based intermetallic compound is in a range of 0.1 μm to 3.0 μm.   
     
     
         2 . The aluminum alloy powder as recited in  claim 1 ,
 wherein the aluminum alloy further consists of B: 0.0001 mass % to 0.03 mass %.   
     
     
         3 . A method of producing an aluminum alloy powder, comprising:
 quench-solidifying a molten metal of an aluminum alloy by an atomizing method to powder it to thereby 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 %; one or two kinds of metals selected from the group consisting of Cr and Mn: 0.02 mass % to 2.0 mass % of, respectively; 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 %; one or two kinds of metals selected from the group consisting of Cr and Mn: 0.02 mass % to 2.0 mass % of, respectively; and the balance being Al and inevitable impurities,
 wherein the aluminum alloy extruded material contains an Al—Fe based intermetallic compound, and   wherein in a cross-sectional structure of the aluminum alloy 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.   
     
     
         5 . The aluminum alloy extruded material as recited in  claim 4 ,
 wherein the aluminum alloy extruded material further contains B: 0.0001 mass % to 0.03 mass %.   
     
     
         6 . The aluminum alloy extruded material as recited in  claim 4 ,
 wherein the intermetallic compound is an Al—Fe—V—Mo based intermetallic compound contains at least Al, Fe, V, and Mo,   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 . A method of producing an aluminum alloy extruded material, comprising:
 a compression molding step of compression molding the aluminum alloy powder as 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 in the extruded material an Al—Fe based intermetallic compound, and wherein in a cross-sectional structure of the extruded material, an average circle equivalent diameter of the Al—Fe based intermetallic compound is within a range of 0.1 μm to 3.0 μm.