| 摘要 |
PURPOSE:To obtain an Al alloy thin plate for a fin suitable as corrosion- resistant flux brazing and vacuum brazing by subjecting an Al alloy having specific compsn. to a heat treatment, hot rolling and cold rolling including intermediate annealing. CONSTITUTION:The ingot of the Al alloy contg., by weight, 0.2-2.0% Mn, 0.3-0.8% Fe, <0.6% Si and <2.0% Zn is heated to 420-540 deg.C, is retained for 1-24hr and is subjected to a homogenizing treatment. The alloy is then hot rolled, is immediately or after hot rolling, subjected to intermediate annealing at least for two times and is subjected to the cold rolling in such a manner that the cold rolling ratio from the intermediate annealing one time before the last to the final annealing is regulated to 10-60% and the cold rolling ratio from the final intermediate annealing to the final plate thickness is regulated to 20-50%, by which the title thin plate is manufactured. |
