ALUMINUM ALLOY SHEET EXCELLENT IN FORMABILITY, BAKING HARDENING AND CORROSION RESISTANCE AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To produce an aluminum alloy sheet excellent in formability, baking hardening and corrosion resistance and used for the outer sheet or the like of an automobile, etc. ;SOLUTION: This aluminum alloy has the compsn. contg., by weight, 0.35 to 1.6% Mg and 0.35 to 1.6% Si (where Si/Mg≥0.65), furthermore contg. at least one or more kinds among ≤0.8% Cu, ≤0.1% Ti, ≤0.3% Fe, ≤0.3% Cr, ≤0.8% Mn and ≤0.15% Zr, and the balance Al with inevitable impurities (respectively by ≤0.05%). Then, the size of Si precipitates on the grain boundaries is regulated to ≤1.0μm, the distance between the precipitates is regulated to ≥5μm, and its electric conductivity is regulated to 40 to 45%.;COPYRIGHT: (C)1998,JPO