| 摘要 |
PROBLEM TO BE SOLVED: To obtain a strip for electrochemical surface roughening, in which repeated bending fatigue strength in a direction perpendicular to the rolling direction exceeds a specific cycle and tensile strength after annealing treatment is a specific value or above, by rolling an aluminum alloy having a composition containing specific percentages of Fe, Mg, Si, Mn, and Cu with impurities attributable to manufacture. SOLUTION: The use of an aluminum alloy having a composition containing 0.30-0.40% Fe, 0.10-0.30% Mg, 0.05-0.25% Si, <=0.05% Mn, <=0.04% Cu, and impurities can provide a lithography strip in which repeated bending fatigue strength in a direction perpendicular to the rolling direction, tensile strength after annealing at 240 deg.C for 10 min, and residual resistivity ratio are regulated to >=1,250 cycles, >=145 N/mm2, and 10-20, respectively, and which has spherulitic recrystallized grains of <50μm average diameter at the surface. This strip can be manufactured by continuously casting an aluminum alloy, homogenizing the resultant rolling ingot at 480-620 deg.C, hot rolling the ingot at >=250 deg.C, and then applying cold rolling.
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