| 摘要 |
PURPOSE:To inexpensively provide aluminum material products to the outside surfaces of which the residues of a flux do not stick according to brazing. CONSTITUTION:The aluminum material parts 1, 1 placed atop a conveyor 2 are brazed by heating during the passage through a heating furnace 3. The flux is not applied on the aluminum material parts 1, 1. Gaseous N2 contg. >=0.05vol.% gaseous HF is filled in the brazing space 6 of this heating furnace 3. The oxide films on the surfaces of the aluminum material parts 1, 1 are broken by the gaseous HF. The good brazing property of the aluminum material parts to each other is thus assured. |
