| 摘要 |
PURPOSE:To execute dip brazing and joining with good workability and econ omy by dipping an Al or Al alloy member preliminarily attached with a brazing filler metal in a molten flux consisting of a specifically composed BaCl2, NaCl, KCl and fluoride. CONSTITUTION:The flux is constituted of 55-47wt% BaCl2, 18-22% NaCl, 27-33% KCl, and 1-20% fluoride such as AlF3 or NaF. Said flux is melted and the Al or Al alloy member preliminarily clad with the brazing filler metal in the joint part is dipped therein. The above-mentioned flux has no deliquescent characteristic, can substantially eliminate the need for a dehydration operation of the flux and maintains the required and chemical activity and various other performances. The dip brazing and joining of the Al or Al alloy are thus execut ed with the good workability and economy while the brazability of high reliabil ity is maintained. |
