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Title:
MANUFACTURE OF AL ALLOY BRAZING SHEET STRIP FOR FLAT TUBE EXCELENT IN CUTTABILITY
Document Type and Number:
Japanese Patent JPH059672
Kind Code:
A
Abstract:

PURPOSE: To obtain an Al alloy brazing sheet strip by subjecting an ingot clad with prescribed Al alloy materials on both faces of a core material constituted of an Al alloy in which Si, Fe, Cu, Mn or the like are specified to hot rolling and thereafter executing cold rolling and annealing under prescribed conditions.

CONSTITUTION: An alloy constituted of, by weight, 0.05 to 0.8% Si, 0.05 to O.6% Fe, 0.1 to 1% Cu, 0.6 to 1.6% Mn, ≤0.5% Mg, ≤0.3% Cr, ≤0.3% Zr, ≤0.3% Ti and the balance Al is melted. This Al allay is used as a core material, and its one face is clad with an Al-Si alloy brazing filler metal and the other face is clad with an Al alloy material having a sacrificial effect. Next, this Al alloy ingot is subjected to homogenizing treatment and hot rolling and is thereafter subjected to cold rolling at ≥30% draft. Then, it is annealed at 220 to 320°C for 0.5 to 12hr, is successively subjected to cold rolling at 5 to 30% draft and is annealed at 320 to 400°C for 0.5 to 12hr to regulated its strength to prescribed one.


Inventors:
HIRANO YOJI
DOKOU TAKENOBU
YAMAGUCHI MOTOYOSHI
Application Number:
JP18573991A
Publication Date:
January 19, 1993
Filing Date:
June 28, 1991
Export Citation:
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Assignee:
FURUKAWA ALUMINIUM
International Classes:
C22C21/00; C22F1/00; C22F1/04; (IPC1-7): C22C21/00; C22F1/04