Title:
AL-MG-SI-BASED ALUMINUM ALLOY EXTRUDED PRODUCT AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2020/085082
Kind Code:
A1
Abstract:
Provided is an Al-Mg-Si-based aluminum alloy extruded product capable of suppressing corrosion loss even in a corrosive environment. This Al-Mg-Si-based aluminum alloy extruded product contains 0.95-1.25 mass% of Si, 0.80-1.05 mass% of Mg, 0.30-0.50 mass% of Cu, 0.40-0.60 mass% of Mn, 0.15-0.30 mass% of Fe, 0.09-0.21 mass% of Cr, 0.0001-0.03 mass% of B, 0.25 mass% or less of Zn, 0.05 mass% or less of Zr and 0.10 mass% or less of Ti, with the remainder comprising Al and unavoidable impurities. The metal structure in a cross section that passes through the center of gravity of the extruded product, which is a flat cross section in the direction of extrusion of the aluminum alloy extruded product, has a fibrous structure. The ratio of the area of the fibrous structure relative to the total area of the cross section is 90% or more. A recrystallized layer is present at the outer surface of the extruded product. The thickness of the recrystallized layer is 100 µm or less.
Inventors:
KITAMURA KEIZO (JP)
Application Number:
PCT/JP2019/039625
Publication Date:
April 30, 2020
Filing Date:
October 08, 2019
Export Citation:
Assignee:
SHOWA DENKO KK (JP)
International Classes:
C22C21/02; B21C23/00; C22C21/06; C22F1/05; C22F1/00
Domestic Patent References:
| WO2016129127A1 | 2016-08-18 | |||
| WO2019171818A1 | 2019-09-12 |
Foreign References:
| JP2000054049A | 2000-02-22 | |||
| JP2003155535A | 2003-05-30 | |||
| JP2001003128A | 2001-01-09 | |||
| JPH10317113A | 1998-12-02 |
Attorney, Agent or Firm:
SHIMIZU Yoshihito et al. (JP)
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