METHOD FOR MANUFACTURING PRECOATED Al ALLOY SHEET, PRECOATED Al ALLOY SHEET RICH IN DESIGN CHARACTERISTICS AND BEND FORMABILITY MANUFACTURED BY THE METHOD, HOUSING USING THE PRECOATED Al ALLOY SHEET, AND MEASURING INSTRUMENT USING THE HOUSING

摘要

PROBLEM TO BE SOLVED: To provide a precoated Al alloy sheet rich in design characteristics and bend formability, and a manufacturing method therefor. SOLUTION: The method for manufacturing the precoated Al alloy sheet comprises soaking an ingot of the Al alloy, hot-rolling it so as to make the finishing temperature to be 300°C or higher, subsequently cold-rolling it with a rolling reduction of 10-30%, heat-treating it at 200-260°C to manufacture an Al alloy sheet 1, subjecting the Al alloy sheet 1 sequentially to pre-treatment and resin-priming treatment, then, coating and baking a resin paint containing 8-42 vol.% of resin aggregates 4 having a mean particle diameter of 20μm or more and the maximum particle diameter of 160μm or less, to form a coating 5. COPYRIGHT: (C)2003,JPO