ALUMINUM ALLOY SHEET FOR FORMING, METHOD FOR PRODUCING THE SAME AND METHOD FOR WORKING ALUMINUM ALLOY SHEET FOR FORMING

摘要

PROBLEM TO BE SOLVED: To provide an aluminum alloy sheet for forming whose formability can be improved by improving its lubricity when being fed with lubricating oil without deteriorating the cleanliness of the lubricating oil; to provide a method for producing the same; and to provide a method for working the aluminum alloy sheet.;SOLUTION: The aluminum alloy sheet 1 for forming has an aluminum alloy sheet 2 and a hydrated oxide film 3 on the surface thereof. The hydrated oxide film 3 satisfies the relation of A2/A1≥0.1 provided that the maximum value of the absorbance in the vicinity of 1,100 cm^-1 is defined as A1 and the maximum value of the absorbance in the vicinity of 1,350 cm^-1 is defined as A2 in Fourier Transform Infrared Spectroscopy. In the production of the aluminum alloy sheet 1 for forming, the aluminum alloy sheet 2 is brought into contact with an alkali treatment liquid, so as to remove a natural oxide film, and is thereafter brought into contact with a hydrothermal treatment liquid heated to ≥50°C without performing desmut treatment, so as to form the hydrated oxide film 3.;COPYRIGHT: (C)2007,JPO&INPIT