| 摘要 |
PURPOSE:To obtain an assembly excellent in surface treatment properties and corrosion resistance in post treatment by brazing a member of Al alloy containing a limited weight of Mg in a non-oxidizing atmosphere wherein a limited mmHg of chloride or fluoride flux vapor exists as the partial pressure. CONSTITUTION:When the member of Al alloy containing 0.3-1.2% Mg by weight is brazed through brazing filler metal, the member is brazed in the non-oxidizing atmosphere wherein 0.05-3.5mmHg of chloride or fluoride flux vapor exists as the partial pressure. At this time, since this vapor attaches uniformly to the member and breaks the oxide film on its surface, wettability of the brazing filler metal is promoted. Further, the vapor combines with water, oxygen in the atmosphere, makes the atmosphere of non-oxidizing properties and prevents oxidation of the member effectively. |
