Production method for aluminum alloy low-temperature brazing solder
A technology of aluminum alloy and brazing material, which is applied in welding equipment, metal processing equipment, welding/cutting medium/material, etc., to save energy and reduce brazing temperature
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Embodiment 1
[0026] The aluminum alloy low-temperature brazing filler metal of the present invention, it is by mass percentage be 26.6% tin (Sn), the gallium (Ga) of 15.8%, the indium (In) of 22.0% and the bismuth (Bi) of 35.6% Smelted as follows:
[0027] In the first step, the four raw materials of solid pure bismuth block, pure tin block, pure indium block and liquid pure gallium are weighed according to the above proportions for batching;
[0028] In the second step, put the four raw materials into the closed crucible;
[0029] The third step is to pass pure argon into the closed crucible to remove the air; then continue to heat and melt the above-mentioned raw materials under the protection of argon, when the temperature rises to 160°C±5°C, the alloy is completely melted, and the temperature is kept for 10±1min Homogenize the composition of the alloy liquid phase; then continue to cool the alloy liquid under the protection of argon to solidify it into a solder alloy block. The metall...
Embodiment 2
[0033] The aluminum alloy low-temperature brazing filler metal of the present invention, it is by the mass percentage be 25.0% tin (Sn), the gallium (Ga) of 12.0%, the indium (In) of 25.8% and the bismuth (Bi) of 37.2% Smelted as follows:
[0034] The first step is to weigh the four raw materials of solid pure bismuth block, pure tin block, pure indium block and liquid pure gallium respectively, and weigh 25-29% tin, 12-17% gallium, 22-26% Indium and the balance are the ratio of bismuth to carry out batching to described four kinds of raw materials;
[0035] In the second step, put the four raw materials into the crucible, and sprinkle a certain amount of rosin on the four raw materials at the same time (or mix triethanolamine, bromic acid, and rosin according to the ratio of 5:3:2);
[0036] The third step is to heat and melt the four alloys and the protective flux in an electric furnace. When the temperature rises to 160°C±5°C, the alloy is completely melted, and a certain ...
Embodiment 3
[0040] The aluminum alloy low-temperature brazing filler metal of the present invention, it is by the mass percentage be 29.0% tin (Sn), the gallium (Ga) of 17.0%, the indium (In) of 23.4% and the bismuth (Bi) of 30.6% Melting according to the method of Example 2 to form a brazing material alloy block, and then processing it into a long block-shaped brazing material by mechanical division.
[0041] Grind the aluminum alloy 6063 sample with sandpaper and wash it with acetone to remove surface dirt, place the brazing filler metal processed into long strips at the joint, and evenly spread liquid flux on the joint and brazing filler metal, and the flux action time is 10 seconds bell. After the joint is fixed by the clamp, flame brazing is carried out. The brazing temperature range is 130-140°C. After the joint is welded, it is cooled to room temperature. After the flame brazing of the joint, the appearance is well formed. The measured shear strength of the brazed joint is 15.5 MP...
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Abstract
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