METHOD OF BRAZING ALUMINUM MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a method of brazing aluminum material having excellent fillet forming ability equal to or higher than a conventional brazing method using a fluoride flux and capable of using a bonded member formed of an Mg-added aluminum alloy effective for thinning and strength enhancement.SOLUTION: In a method of brazing aluminum material of bonding a brazed member 4 formed of aluminum material by brazing it with an Al-Mg-Si based brazing filler metal 3 containing 0.2-5.0% of Mg and 3-13% of Si in mass%, excellent fillet forming ability is obtained by performing brazing with the Al-Mg-Si based brazing filler metal 3 by arranging a composition 5 containing a silicon compound which is liquefied at normal temperature and Si powder at least on a bonded part surface 4a of the brazed member 4. In addition, a bonded member formed of an Mg-added aluminum alloy effective for thinning and strength enhancement can be used as a fluoride flux is not used.