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1. (WO2017033663) ALUMINUM ALLOY EXTRUDED MATERIAL AND METHOD FOR PRODUCING SAME

Pub. No.:    WO/2017/033663    International Application No.:    PCT/JP2016/072198
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Fri Jul 29 01:59:59 CEST 2016
IPC: C22C 21/12
C22F 1/057
C22F 1/00
Applicants: UACJ CORPORATION
株式会社UACJ
UACJ EXTRUSION CORPORATION
株式会社UACJ押出加工
Inventors: TAMADA, Yuko
玉田 裕子
HATTA, Hidenori
八太 秀周
ISHIDA, Koichi
石田 紘一
Title: ALUMINUM ALLOY EXTRUDED MATERIAL AND METHOD FOR PRODUCING SAME
Abstract:
This aluminum alloy extruded material has a chemical composition that contains, in mass%, 2.5-3.3% of Cu, 1.3-2.5% of Mg, 0.50-1.3% of Ni, 0.50-1.5% of Fe, less than 0.50% of Mn, 0.15-0.40% of Si, 0.06-0.20% of Zr and less than 0.05% of Ti, with the balance made up of Al and unavoidable impurities. In a cross-section of this aluminum alloy extruded material, the circle-equivalent diameters of intermetallic compound particles are 20 μm or less; the density of intermetallic compound particles having circle-equivalent diameters of 0.3-20 μm is 5 × 103 particles/mm2 or more; and the average circle-equivalent diameter of crystal subgrains is 20 μm or less.