HIGH STRENGTH AND HIGH FORMABILITY ALUMINUM ALLOY SHEET EXCELLENT IN REFINING OF RECRYSTALLIZED GRAIN AT THE TIME OF HIGH TEMPERATURE ANNEALING

摘要

PROBLEM TO BE SOLVED: To provide an Al-Mg series Al alloy sheet in which, even in the case high temperature recrystallization annealing is executed, the grains after the annealing can be made into the ultrafine ones with the recrystallized grain size of ≤5 μm. ;SOLUTION: This Al-Mg series Al alloy sheet contains 3.0 to 10.0% Mg and 0.1 to 1.5% Mn, and the balance Al with inevitable impurities, is applied with a rolling reduction of ≥90% in cold rolling and moreover, whose recrystallized grain size after final annealing is controlled to ≤5 μm, in which the maximum length of an Al-Mn series compound dispersedly precipitated into the structure is controlled to ≤500 nm.;COPYRIGHT: (C)2001,JPO