Brazing and welding method of aluminum target and copper-containing back plate
A welding method and copper backplane technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of decreased welding strength, unsuitable welding, complicated welding process, etc., and achieve the effect of improving welding strength
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Embodiment 1
[0045] The size of the aluminum target used in this embodiment is φ300×18 mm, the size of the copper back plate is φ360×25 mm in outer dimension, and the size of the inner groove (welding groove) is φ300.5×5 mm.
[0046] The composition of the Sn-Zn solder is 90% by mass of Sn and 10% by mass of Zn; the composition of the Sn-Ag-Cu solder is 96.5% by mass of Sn %, the mass percentage of Ag is 3%, and the mass percentage of Cu is 0.5%.
[0047] Brazing welding method of aluminum target and copper back plate:
[0048] (1) Heating the aluminum target to 250° C., then placing Sn-Zn solder on the welding surface of the aluminum target, and infiltrating with a steel brush to form a solder layer on the welding surface of the aluminum target. The thickness of the solder layer is 5 microns;
[0049] (2) Heating the copper backplane to 250°C, then placing Sn-Ag-Cu solder on the soldering surface of the copper backplane, and using a steel brush to infiltrate it to form a solder layer on...
Embodiment 2
[0053] The difference between this embodiment and Example 1 is that the copper backplane is replaced with a copper alloy backplane of the same size; the material of the copper alloy backplane is C18000 copper-chromium alloy backplane; other conditions are completely different from those in Example 1. same.
[0054] The welding method described in this embodiment does not cause obvious corrosion to the welding surface of the copper alloy backplane, and the copper alloy backplane can be recycled.
Embodiment 3
[0056] The size of the aluminum target used in this embodiment is φ300×18 mm, the size of the copper back plate is φ360×25 mm in outer dimension, and the size of the inner groove (welding groove) is φ300.5×5 mm.
[0057] The composition of the Sn-Zn solder is 89% by mass of Sn and 11% by mass of Zn; the composition of the Sn-Pb-Ag solder is 65% by mass of Sn %, the mass percentage of Ag is 3.5%, and the mass percentage of Pb is 31.5%.
[0058] Brazing welding method of aluminum target and copper back plate:
[0059] (1) Heating the aluminum target to 200° C., and then placing Sn-Zn solder on the welding surface of the aluminum target, performing infiltration treatment with ultrasonic waves, and forming a solder layer on the welding surface of the aluminum target. The thickness of the solder layer is 8 microns;
[0060] (2) Heating the copper backplane to 200°C, then placing Sn-Pb-Ag solder on the welding surface of the copper backplane, and infiltrating with a steel brush to...
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