| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy plate having enhanced scratch resistance for lamination or the like, without spoiling the characteristics of the aluminum alloy plate such as coating vividness and press molding performance. SOLUTION: The average surface roughness Ra on the center line of this aluminum alloy plate is 0.6μm or more when measured according to the surface roughness measuring method prescribed in JIS BO601, and the specific peak count should be 10 crests or more. As shown in the figure (b), there is provided an upper peak count level C2 which is 2.0μm of the peak count level (h) off above the center line C1 of the surface roughness curve of the aluminum alloy plate and is parallel with the center line C1. When there are two points where the upper peak count level C2 and the roughness curve A intersect, each figure formed between the two points (for example, protrusion B1, protrusion B2 and so on) is counted as one crest. The peak count means the total number of the crests in the sampling length L of 8.0mm. COPYRIGHT: (C)2004,JPO
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