Title:
PRODUCTION OF ALUMINUM ALLOY EXTRUDED SHAPE HAVING EXCELLENT BENDABILITY AND HIGH STRENGTH
Document Type and Number:
Japanese Patent JP3670706
Kind Code:
B2
Abstract:
PURPOSE: To produce an aluminum alloy extruded shape having excellent bendability and high strength.
CONSTITUTION: An aluminum alloy, having a composition consisting of, by weight, 0.3-1.5% Mg, 0.2-1.8% Si, and the balance Al with inevitable impurities, is used as a billet. The aluminum alloy extruded shape, having excellent bendability and high strength, can be produced by subjecting an ingot of the alloy to preheating at 400-500°C and to hot extrusion and then subjecting the resulting hot extruded shape to cooling down to 50-140°C at ≥50°C/min cooling rate and to stabilizing treatment consisting of holding at a temp. in the above temp. range and also in the range where the proof stress of the alloy becomes ≤120N/mm2 for 1-50hr, or, after the extrusion, subjecting the extruded shape to cooling down to ≥50°C and, within 1hr, to the above stabilizing treatment. By this method, the aluminum alloy extruded shape, capable of having high strength even if heat treatment, such as solution heat treatment and aging, after extrusion is omitted and also excellent in bendability, can be obtained.
Inventors:
Masao Kikuchi
Yukio Sasaki
Makoto Saga
Yukio Sasaki
Makoto Saga
Application Number:
JP7108195A
Publication Date:
July 13, 2005
Filing Date:
March 29, 1995
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C22F1/05; C22C21/00; C22C21/02; C22C21/06; C22F1/00; (IPC1-7): C22F1/05; C22C21/02; C22C21/06
Domestic Patent References:
| JP7054090A | ||||
| JP3180453A | ||||
| JP6025783A | ||||
| JP4147951A |
Attorney, Agent or Firm:
Shiina Akira
Ning Yoshishima
Ning Yoshishima
Previous Patent: REVERSING-TYPE SEAL
Next Patent: SPIRO COMPOUND AND ITS USE AS ELECTROLUMINESCENT MATERIAL
Next Patent: SPIRO COMPOUND AND ITS USE AS ELECTROLUMINESCENT MATERIAL