Rare earth-containing tin-base lead-less brazing alloy and its prepn
A lead-free solder, anti-corrosion technology, used in manufacturing tools, welding equipment, metal processing equipment, etc., can solve problems such as high price, low crustal content, and reduced mechanical strength
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example 1
[0020] Example 1: Weigh 130 grams of potassium chloride and 100 grams of lithium chloride into an alumina crucible, mix well, heat and melt to 600 ° C, pour molten salt on 95.5% pure tin to completely melt the tin, at 450 At ℃, add 4% Zn into the molten tin liquid, and at the same time stir continuously to melt Zn; quickly press 0.5% rare earth into the molten mixed salt and Sn-Zn alloy, stir and melt; keep warm for 30 minutes, Let it stand for 10 minutes and then take it out of the furnace to cool, and remove the mixed salt of potassium chloride and lithium chloride on the surface after solidification. Reheat and melt the brazing filler metal to 350°C, pour the molten brazing solution on the slightly inclined angle steel, and let it cool rapidly into strips for use.
example 2
[0021] Example 2: Weigh 130 grams of potassium chloride and 100 grams of lithium chloride into an alumina crucible, mix well, heat and melt to 600°C, pour molten salt on 93.8% pure tin to completely melt the tin, at 450 At ℃, add 6% Zn into the molten tin liquid while stirring continuously to melt Zn; quickly press 0.2% rare earth into the molten mixed salt and Sn-Zn alloy, stir and melt; keep warm for 30 minutes, Let it stand for 10 minutes and then take it out of the furnace to cool, and remove the mixed salt of potassium chloride and lithium chloride on the surface after solidification. Reheat and melt the brazing filler metal to 350°C, pour the molten brazing solution on the slightly inclined angle steel, and let it cool rapidly into strips for use.
example 3
[0022] Example 3: Weigh 130 grams of potassium chloride and 100 grams of lithium chloride into an alumina crucible, mix well, heat and melt to 600 ° C, pour molten salt on 91.95% pure tin to completely melt the tin, at 450 At ℃, add 8% Zn into the molten tin liquid, while stirring continuously to melt Zn; quickly press 0.05% rare earth into the molten mixed salt and Sn-Zn alloy, stir and melt; keep warm for 30 minutes, Let it stand for 10 minutes and then take it out of the furnace to cool, and remove the mixed salt of potassium chloride and lithium chloride on the surface after solidification. Reheat and melt the brazing filler metal to 350°C, pour the molten brazing solution on the slightly inclined angle steel, and let it cool rapidly into strips for use.
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