초록 ▼

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 art

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.

대표청구항 ▼

[ What is claimed is:] [1.] A method for preparing an aluminum-alloy article, comprising the steps of:providing an article precursor stock made of an aluminum alloy, the article precursor stock being initially oversize as compared with the final required size of the article;solution treating and ann

[ What is claimed is:] [1.] A method for preparing an aluminum-alloy article, comprising the steps of:providing an article precursor stock made of an aluminum alloy, the article precursor stock being initially oversize as compared with the final required size of the article;solution treating and annealing the article precursor;deforming the article precursor;aging the article room temperature;providing a curable organic coating material, the coating material having a non-volatile portion that is predominantly organic and is curable at about a heat-treatment temperature of the aluminum-alloy article precursor;applying the organic coating material to the aluminum-alloy article precursor; andheat-treating the coated aluminum article precursor at a temperature and for a time sufficient to cure the organic coating.