Stock material or miscellaneous articles – Composite – Of metal
Patent
1998-01-12
1999-07-13
Cameron, Erma
Stock material or miscellaneous articles
Composite
Of metal
148251, 148275, 148276, 148518, 148537, 148688, 148698, 148703, C22F 104
Patent
active
059224720
ABSTRACT:
An aluminum-alloy article such as a fastener is prepared by providing an aluminum-alloy article precursor that is not in its final heat-treated state, and in one form is in its solution treated/annealed state. A curable organic coating material is also provided. The method includes anodizing the article precursor, preferably in chromic acid solution and without chemical sealing during anodizing, applying the organic coating material to the aluminum-alloy article precursor, and precipitation heat-treating the coated aluminum article precursor to its final heat-treated state, thereby simultaneously curing the organic coating. If the aluminum alloy temper is of the naturally aging type, it is optionally lightly deformed prior to precipitation treatment aging. The approach may also be applied to articles that are not solution treated/annealed and aged, by first overly deforming the article precursor so that the curing treatment of the coating also partially anneals the article precursor to the final desired deformation state.
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Cameron Erma
McDonnell Douglas Corporation
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