Oxygen-free copper composite welding method
A composite welding and oxygen-free copper technology, which is applied in welding equipment, welding equipment, auxiliary welding equipment, etc., can solve the problems of large deformation, solder overflow, etc., and achieve good vacuum sealing, high welding precision and tight combination.
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[0025] Example 1:
[0026] The precision welding method of oxygen-free copper in this example is as follows: the contact surface roughness of the welded parts is 0.4, the parts are immersed in an acetone solution for ultrasonic cleaning for 30 minutes, and then put into a hydrogen furnace for hydrogen annealing treatment, the hydrogen burning temperature is 550 ℃, The holding time is 60min. Then assemble the oxygen-free copper parts to ensure that the joint surfaces are in close contact, and the relative positions are fixed by methods such as centering rods. Enter the vacuum furnace, and apply 0.2MP diffusion pressure by means of heavy object pressure, the vacuum degree is always better than 1×10 during the diffusion welding process -3 Pa, heat up to 950°C at a heating rate of 15°C / min, hold for 60 minutes, then cool to 300°C at a rate of 10°C / min, and then cool to room temperature with the furnace to complete the low-pressure diffusion welding; Place electric vacuum solder in t...
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[0027] Example 2:
[0028] The difference between this example and the first example is that the roughness of the contact surface of the welding piece is 0.2, and the others are the same as the first example.
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[0029] Example 3:
[0030] The difference between this example and example one is that the pressure of low-pressure diffusion welding is 0.08MPa, and the others are the same as example one.
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