Aluminum alloy extruded material excellent in appearance quality having an anodized film and method of manufacturing the same

摘要

An object of the present invention is to provide a 7000-series aluminum alloy extruded material having a desired strength and hardly causing streaks on the surface of an anodized film. According to the present invention, there is provided an aluminum alloy extruded material which comprises 4.0 to 7.5 mass% of Zn, 1.0 to 2.2 mass% of Mg, 0.05 to 0.20 mass% of Fe, 0.30 mass% or less of Cu, Ti: not less than 0.005 mass% and not more than 0.04 mass%, B: not less than 0.001 mass% nor more than 0.02 mass%, Si: not more than 0.15 mass%, Zr: not more than 0.05 mass%, Mn: not more than 0.05 mass% [Zr + Mn + Cr + V + Ti] V: 0.05 mass% or less and the sum of the contents of Zr, Mn, Cr, Mass%, and the remainder is aluminum and inevitable impurities, except for the range where the content of Zn is 6.0 mass% or less and the content of Mg is 1.2 mass% or less, and the metal structure is a recrystallization structure An aluminum alloy extruded material excellent in appearance quality and a method for producing the same.