The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 30, 1993
Filed:
Aug. 14, 1992
Hidetoshi Uchida, Tokyo, JP;
Hideo Yoshida, Tokyo, JP;
Sumitomo Light Metal Industries, Ltd., Tokyo, JP;
Abstract
A process for manufacturing an aluminum alloy material having excellent shape fixability and bake hardenability, the process comprising: conducting semicontinuous casting of an aluminum alloy comprising 0.4 to 1.7% (wt.%) Si and 0.2 to 1.4% Mg, optionally further comprising 0.05% or less Ti and 100 pm or less B and optionally further comprising at least one member selected from the group of 1.00% or less Cu, 0.50% or less Mn, 0.20% or less Cr and 0.20% or less V, with the balance consisting of Al and unavoidable impurities, subjecting the cast alloy to conventional hot rolling; conducting solution heat treatment by holding the hot-rolled alloy at a temperature of from 450 to 580.degree. C. for 10 minutes or less; conducting first-stage cooling of the alloy at a cooling rate of 200.degree. C./min or more to a quenched temperature in the range of from 60 to 250.degree. C.; and subjecting the alloy to second-stage cooling at a cooling rate selected within the zone ABCD shown in the attached FIG. 2.