Non-vacuum semi-solid stirring brazing method for aluminum alloy and composite material thereof
A composite material and brazing method technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problem of semi-solid connection technology that has not been reported, and achieve the goal of overcoming adverse consequences, improving performance, and short welding cycle. Effect
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Embodiment 1
[0034] Example 1: Mount the aluminum-based composite weldment 1 on the welding platform 4 and place the Zn-Al medium-temperature brazing filler metal 2 on the two surfaces to be welded. The brazing filler metal 2 can be in the form of a sheet, a square column, a coating or sprayed on Surface to be welded. The welding piece is heated by the resistance heater 3, and the heating temperature is between 390-420°C, such as 390°C, 400°C, 410°C, 420°C, so that the solder 2 is partially melted. Immediately start the rotating sliding device, the orbital sliding platform 7 drives the stirring head 5 to move, and the rotating motor 8 mounted on the motor support 9 drives it to rotate. The rotation speed is 150-300 rpm, such as 150 rpm, 180 Revolutions / min, 200 revolutions / min, 230 revolutions / min, 250 revolutions / min, 280 revolutions / min or 300 revolutions / min, the temperature is constant during the rotation process, and the longitudinal movement speed of the stirring head 5 parallel to th...
Embodiment 2
[0035] Example 2. The second embodiment of the present invention is based on the first embodiment. After one rotation, the holding temperature is between 430-440°C, such as 430°C, 435°C, 440°C, and the holding time In 2-5 minutes, the middle solder 2 is further melted. After that, start the rotary sliding device (secondary rotation) again, the rotation speed is 100-150 revolutions / min, such as 100 revolutions / min, 120 revolutions / min, 150 revolutions / min, the stirring head slides in the opposite direction, and the moving speed is 1-1.5 cm / minute. When the stirring head moves to the initial end of the weld, stop rotating, lift the stirring head, and keep it warm for 15-30 minutes, such as 15 minutes, 22 minutes, 27 minutes, 30 minutes, and cool down with the furnace.
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