FIELD: metallurgy.
SUBSTANCE: flux contains components in the following ratio, wt %: lithium chloride 31-33, aluminium fluoride 2-4.5, barium chloride 18-19, potassium fluoride 1.5-3, tin chloride-3-10, potassium chloride is the rest. To obtain the flux, melting of potassium chloride, lithium chloride and barium chloride is carried out at a temperature of 750-770°C and a mixture of potassium fluoride and aluminium fluoride is added to the melt. The melt is poured and colled. The obtained solid alloy is ground and mixed with 3-10% tin chloride. The charge is melted at a temperature of 450-500°C and the fobtained flux is poured into bars.
EFFECT: flux provides high spreadability of solder and activation of aluminium surface at solder melting point.
2 cl, 5 ex
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