MANUFACTURE OF JOINED MEMBER BETWEEN ALUMINUM BASED MATERIAL AND IRON BASED MATERIAL

摘要

PROBLEM TO BE SOLVED: To obtain a joined member not generating an intermetallic compound in the interface between an aluminum layer and iron material and not generating a peeling in the brazed part by heating even in the case of using as cooking vessels. SOLUTION: The iron material 21, previously provided the aluminum layer 22 improving the wettability of a brazing filler metal on a joining surface, is brazed to an aluminum material 1 at the temperature range of >=490 deg.C to <550 deg.C. A brazing filler metal 3 composed of, by weight, 20-60% Zn, 3-6% Si and the balance Al with impurities is used for brazing. A flux is composed of KCl-NaCl-BaCl2 flux consisting of, by wt., 23.0-27.0% KCl, 15.0-19.0% NaCl, 49.0-53.0% BaCl2 , and additives consisting of, by wt., 0.5-5% LiF and 1-10% ZnCl2 .