| 摘要 |
PURPOSE: A method for producing flux for aluminum welding that need not cladding treatment is provided to save production cost and product reliability. CONSTITUTION: The production method of flux for aluminum welding includes the steps of (i) melting 87-89wt.% of 40 series aluminum and 5-13wt.% of silica in an electric furnace, followed by stabilization for 30 minutes; (ii) charging the liquid metal in an electric furnace having a lid, and elevating the temperature of the liquid metal to a temperature higher than the melting point thereof by 150 to 200deg.C; (iii) stabilizing the flow of liquid metal; and (iv) mixing 30-55wt.% of aluminium powder that is manufactured by nitrogen gas spraying, 8-15wt.% of KAlF4 that is manufactured with aluminium hydroxide, fluoric acid, and potassium carbonate, 40-60wt.% of a fixing agent that comprises 5-20wt.% of resin and 80-95wt.% of solvent.
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