Aluminum alloy, aluminum alloy wire, and method of manufacturing aluminum alloy wire

Abstract

An aluminum alloy has a composition including silicon in an amount of 0.6 mass % to 1.5 mass %, magnesium in an amount of 0.5 mass % to 1.3 mass %, copper in an amount of 0.1 mass % to 1.2 mass %, and manganese in an amount of 0.2 mass % to 1.15 mass %, with the balance consisting of aluminum and inevitable impurities. An average of degrees of orientation of a 111 plane determined by X-ray diffraction of a whole area of a section in a state of having been subjected to solution treatment and aging treatment is 50% or more, and a variance of the degrees of orientation of the 111 plane is 45% or less.

1 . An aluminum alloy comprising a composition including
 silicon in an amount of 0.6 mass % to 1.5 mass %,   magnesium in an amount of 0.5 mass % to 1.3 mass %,   copper in an amount of 0.1 mass % to 1.2 mass %, and   manganese in an amount of 0.2 mass % to 1.15 mass %, with the balance consisting of aluminum and inevitable impurities,   wherein an average of degrees of orientation of a 111 plane determined by X-ray diffraction of a whole area of a section in a state of having been subjected to solution treatment and aging treatment is 50% or more, and a variance of the degrees of orientation of the 111 plane is 45% or less.   
     
     
         2 . The aluminum alloy according to  claim 1 , wherein the composition further includes at least one element selected from the group consisting of iron, chromium, zinc, titanium, and zirconium,
 wherein a content ratio of iron is more than 0 mass % and 0.8 mass % or less,   a content ratio of chromium is more than 0 mass % and 0.35 mass % or less,   a content ratio of zinc is more than 0 mass % and 0.5 mass % or less,   a content ratio of titanium is more than 0 mass % and 0.2 mass % or less, and   a content ratio of zirconium is more than 0 mass % and 0.2 mass % or less.   
     
     
         3 . The aluminum alloy according to  claim 2 , wherein the composition includes
 silicon in an amount of 1.0 mass % to 1.3 mass %,   magnesium in an amount of 0.5 mass % to 1.2 mass %,   iron in an amount of 0.3 mass % to 0.8 mass %,   copper in an amount of 0.1 mass % to 0.4 mass %,   manganese in an amount of 0.2 mass % to 0.5 mass %,   chromium in an amount of more than 0 mass % and 0.3 mass % or less, and   titanium in an amount of 0.001 mass % to 0.1 mass %, with the balance consisting of aluminum and inevitable impurities.   
     
     
         4 . The aluminum alloy according to  claim 2 , wherein the composition includes
 silicon in an amount of 0.6 mass % to 1.5 mass %,   magnesium in an amount of 0.7 mass % to 1.3 mass %,   iron in an amount of 0.02 mass % to 0.4 mass %,   copper in an amount of 0.5 mass % to 1.2 mass %,   manganese in an amount of 0.5 mass % to 1.1 mass %,   chromium in an amount of more than 0 mass % and 0.3 mass % or less,   zinc in an amount of 0.005 mass % to 0.5 mass %,   titanium in an amount of 0.01 mass % to 0.2 mass %, and   zirconium in an amount of 0.05 mass % to 0.2 mass %, with the balance consisting of aluminum and inevitable impurities.   
     
     
         5 . The aluminum alloy according to  claim 1 , having a tensile strength of more than 425 MPa in a state of having been subjected to solution treatment and aging treatment. 
     
     
         6 . An aluminum alloy wire composed of
 the aluminum alloy according to  claim 1 .   
     
     
         7 . A method of manufacturing an aluminum alloy wire, the method comprising:
 performing plastic working on a cast product of an aluminum alloy to manufacture a worked product, the aluminum alloy having a composition including silicon in an amount of 0.6 mass % to 1.5 mass %, magnesium in an amount of 0.5 mass % to 1.3 mass %, copper in an amount of 0.1 mass % to 1.2 mass %, and manganese in an amount of 0.2 mass % to 1.15 mass %, with the balance consisting of aluminum and inevitable impurities;   performing first drawing on the worked product under cold conditions to manufacture a first drawn product;   performing softening treatment on the first drawn product to manufacture a softened product; and   performing second drawing on the softened product under cold conditions to manufacture a second drawn product,   wherein a degree of working in the second drawing is 20% or more and is also higher than a degree of working in the first drawing.   
     
     
         8 . The method of manufacturing an aluminum alloy wire according to  claim 7 ,
 wherein the aluminum alloy further includes at least one element selected from the group consisting of iron, chromium, zinc, titanium, and zirconium,   a content ratio of iron is more than 0 mass % and 0.8 mass % or less,   a content ratio of chromium is more than 0 mass % to 0.35 mass % or less,   a content ratio of zinc is more than 0 mass % and 0.5 mass % or less,   a content ratio of titanium is more than 0 mass % and 0.2 mass % or less, and   a content ratio of zirconium is more than 0 mass % and 0.2 mass % or less.