Title:
耐食性および耐応力腐食割れ性に優れた高強度アルミニウム合金押出材の製造方法
Document Type and Number:
Japanese Patent JP4101614
Kind Code:
B2
Abstract:
Amethod of manufacturing a high-strength aluminum alloy extruded product which excels in corrosion resistance and stress corrosion cracking resistance, and is suitably used in applications as structural materials for transportation equipment such as automobiles, railroad carriages, and aircrafts. The method includes extruding a billet of an aluminum alloy comprising 0.5% to 1.5% of Si, 0.9% to 1.6% of Mg, 0. 8% to 2.5% of Cu, while satisfying the following equations (1), (2), (3), and (4), 3 ≤ Si% + Mg% + Cu% ≤ 4 Mg% ≤ 1.7 x Si% Mg% + Si% ≤ 2.7 Cu%/2 ≤ Mg% ≤ (Cu%/2) + 0.6 and further comprising 0.5% to 1.2% of Mn, with the balance being Al and unavoidable impurities, into a solid product by using a solid die, or into a hollow product by using a porthole die or a bridge die, thereby obtaining the solid product or the hollow product in which a fibrous structure accounts for 60% or more in area-fraction of the cross-sectional structure of the product.
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Inventors:
Hideo Sano
Shinichi Matsuda
Kida Yasushi
Shinichi Matsuda
Kida Yasushi
Application Number:
JP2002319453A
Publication Date:
June 18, 2008
Filing Date:
November 01, 2002
Export Citation:
Assignee:
Sumitomo Light Metal Industry Co., Ltd.
International Classes:
B21C23/00; B21C25/02; C22F1/057; C22C21/00; C22C21/02; C22C21/08; C22F1/00; C22F1/04; C22F1/05
Domestic Patent References:
| JP8225874A | ||||
| JP10306338A | ||||
| JP2001011559A | ||||
| JP2002001423A | ||||
| JP2002317255A | ||||
| JP2001071025A | ||||
| JP2002126816A | ||||
| JP11189837A | ||||
| JP5171328A | ||||
| JP10317113A |
Foreign References:
| US5503690 |
Attorney, Agent or Firm:
Yasuo Fukuda
Kenji Akatsuka
Kenji Akatsuka