Title:
PRODUCTION OF WHEEL RIM MADE OF ALUMINUM
Document Type and Number:
Japanese Patent JP3543842
Kind Code:
B
Abstract:
PURPOSE: To provide a method for producing a lightweight wheel rim made of aluminum high in brightness, excellent in appearance and furthermore excel lent in corrosion resistance.
CONSTITUTION: As the stock, belt-like aluminum alloy sheets having a compsn. contg., by weight, 2.5 to 4.0% Mg, 0.05 to 0.2% Cu, 0.002 to 0.015% Ti and 0.0002 to 0.04% B, in which the contents of Fe, Si, Mn and Cr contained as impurities are respectively regulated so as to satisfy ≤0.1% Fe, ≤0.1.% Si and ≤0.03% (Mn+Cr), and the balance Al are used, and both edge parts of the same aluminum alloy sheets are subjected to butt resistance welding, and after that, the part along the butt resistance welding line is heated to a temp. in the range of 400 to 550°C and is recrystallized, and then, the part heated to ≥400°C is cooled to 400 to <100°C at ≥50°C/min average cooling rate.
Inventors:
Saito, Hiroshi
Application Number:
JP1994000177691
Publication Date:
April 16, 2004
Filing Date:
July 07, 1994
Export Citation:
Assignee:
MITSUBISHI ALUM CO LTD
International Classes:
B60B3/00; B23K11/18; C22C21/06; C22F1/00; C22F1/047; B60B3/00; B23K11/16; C22C21/06; C22F1/00; C22F1/047; (IPC1-7): C22F1/047; B23K11/18; B60B3/00; C22C21/06
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