Title:
ROLLED OR EXTRUDED ALUMINIUM AL-MN ALLOY PRODUCTS WITH IMPROVED CORROSION RESISTANCE
Document Type and Number:
WIPO Patent Application WO2002055750
Kind Code:
A3
Abstract:
The invention concerns a rolled or extruded product, in particular a tube, made of an alloy composition (expressed in wt. %) comprising: Si < 0.30; Fe 0.20-0.50; Cu < 0.05; Mn 0.5-1.2; Mg < 0.05; Zn < 0.50; Cr 0.10-0.30; Ti < 0.05; Zr < 0.05; the balance consisting of aluminium and unavoidable impurities. The invention also concerns a method for making extruded tubes of said composition comprising casting a billet, optionally homogenizing it, extruding a tube, drawing said tube in one or several passes and continuous annealing at a temperature ranging between 350 and 500 DEG C with a temperature increase of less than 10 seconds. The inventive products are designed for pipes and heat exchangers for motor vehicles, and exhibit good corrosion resistance.
More Like This:
Inventors:
MORERE BRUCE (FR)
RONGA ISABELLE (FR)
QUERBES JEAN-LOUIS (FR)
RONGA ISABELLE (FR)
QUERBES JEAN-LOUIS (FR)
Application Number:
PCT/FR2002/000059
Publication Date:
September 26, 2002
Filing Date:
January 09, 2002
Export Citation:
Assignee:
PECHINEY RHENALU (FR)
MORERE BRUCE (FR)
RONGA ISABELLE (FR)
QUERBES JEAN-LOUIS (FR)
MORERE BRUCE (FR)
RONGA ISABELLE (FR)
QUERBES JEAN-LOUIS (FR)
International Classes:
C22C21/00; C22F1/04; (IPC1-7): C22C21/00; C22F1/04
Domestic Patent References:
| WO2000050656A1 | 2000-08-31 | |||
| WO1997046726A1 | 1997-12-11 | |||
| WO1999018250A1 | 1999-04-15 |
Foreign References:
| EP0290358A1 | 1988-11-09 |
Download PDF: