Vacuum welding method for thick film substrate and power shell
A vacuum welding and shell technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problem that the weight of the 10# steel power shell cannot meet the requirements, reduce the thermal conductivity and joint strength, and reduce the bearing area of the joint. It is beneficial to the escape of air bubbles, improving the reliability of welding, and reducing the void rate of the interface
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[0025] Example
[0026] (1) The power shell structure is a dual in-line shell; the power shell adopts lightweight Al-SiC composite material with a SiC volume fraction of 60%, and glass insulators are used to insulate the pins and the shell matrix; the two ends of the power shell are The mounting ear of an isosceles triangle has a rectangular welding surface in the middle. The length of the welding surface is 53mm, the width of the welding surface is 28mm, the thickness of the welding surface is 1.5mm, the waist length of the mounting ear is 17mm, and the thickness of the mounting ear is 2mm; There is a support column on each of the four corners of the power shell, and there are ten pins on the power shell, four of which pass through the welding surface;
[0027] The thermal expansion coefficient of Al-SiC composites is more than half lower than that of oxygen-free Cu, slightly lower than that of No. 10 steel, and is precisely controllable within a certain range, and its specific gr...
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