Aluminum material with high formability

Abstract

An aluminum material, which is composed of crystal grains having different crystal orientations, in which the crystal grains comprise Cube-oriented crystal grains, Brass-oriented crystal grains and Copper-oriented crystal grains with a balance of crystal grains of other orientations, and in which the proportion of the Cube-oriented crystal grains is from 0.3 to 0.7, the proportion of the Brass-oriented crystal grains is from 0.1 to 0.5, the proportion of the Copper-oriented crystal grains is 0.2 or less, and the total proportion of these orientations is from 0.4 to 1.0; and a car component using the same.

1 . An aluminum material, which is composed of crystal grains having different crystal orientations,
 wherein the crystal grains comprise Cube-oriented crystal grains, Brass-oriented crystal grains and Copper-oriented crystal grains with a balance of crystal grains of other orientations;   wherein, among the orientations of crystal grains, the proportion of the Cube-oriented crystal grains is from 0.3 to 0.5, the proportion of the Brass-oriented crystal grains is from 0.25 to 0.5, the proportion of the Copper-oriented crystal grains is from 0.07 to 0.15, and the total proportion of these orientations is from 0.82 to 0.95 with the balance of crystal grains of other orientations;   wherein the aluminium material has sheet formability that does not sustain cracks on a punch-stretched surface stretched at a punch-stretch height of 50 mm, and has hem-bendability in a range within which cracks do not occur on a bent surface at a bent radius/thickness ratio of 0.5 or less; and   wherein the aluminum material is an aluminum alloy comprising from 0.25 to 1.0 mass % of Mg and from 0.5 to 1.3 mass % of Si with a balance of Al and inevitable impurities.   
     
     
         2 . The aluminum material according to  claim 1 , which further comprises 0.1 mass % or less of Cu, 0.06 mass % or less of Mn, and 0.20 mass % or less of Fe. 
     
     
         3 . The aluminum material according to  claim 1 , which further comprises 0.20 mass % or less of each of V and Zr. 
     
     
         4 . The aluminum material according to  claim 2 , which further comprises 0.20 mass % or less of each V and Zr. 
     
     
         5 . A car component using the aluminum material according to  claim 1 . 
     
     
         6 . A car component using the aluminum material according to  claim 2 . 
     
     
         7 . A car component using the aluminum material according to  claims 3 . 
     
     
         8 - 43 . (canceled)