| 摘要 |
PURPOSE:To prevent the remaining of corrosive residues after brazing and to eliminate the need for extra jobs such as cleaning after the operation by specifying the compsn. of a flux for brazing aluminum materials. CONSTITUTION:The compsn. of the flux for brazing the aluminum materials is formed by mixing 10-70wt.% potassium hydrogenfluoride (KHF2) and 90-30wt.% zinc fluoride (ZnF2) and making the entire part 100wt.%. Such flux is charged into water and is stirred to prepare a liquid suspension. The liquid suspension is coated to the butt part of two sheets of Al sheet materials 1, 2. The sheet materials 1, 2 coated with the liquid suspension contg. the flux are put into a heating furnace after drying and are heated in a gaseous nitrogen atmosphere, by which the two materials 1, 2 are brazed. |
