A welding method of 2219/3a21 dissimilar aluminum alloy socket structure
A dissimilar aluminum alloy, 3A21 technology, applied in welding equipment, laser welding equipment, electron beam welding equipment, etc., can solve problems such as welding cracks, and achieve the effects of avoiding welding cracks, suppressing welding cracks, and reliable welding
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Embodiment 1
[0041] 1. Process the welding interface of 2219 and 3A21 parts, the cross-sectional dimension of the former annular boss a=b=0.5mm, such as figure 2 As shown, the latter remains in the state of no annular boss;
[0042] 2. Degrease, clean and dry 2219 and 3A21 parts;
[0043] 3. Assembly;
[0044] 4. Using laser welding, the parameters are as follows: spot diameter 0.3~0.5mm, defocus amount -5mm~5mm, laser power 1800~2500W, welding speed 15~25mm / s;
[0045] 5. Check the quality of the weld and detect the leak rate of the weld, the leak rate is ≤6.7×10 -7 Pa.m 3 .s -1 .
Embodiment 2
[0047] 1. Process the welding interface of 2219 and 3A21 parts, the cross-sectional dimension of the former ring boss is a=b=1.0mm, and the latter remains in the state of no ring boss;
[0048] 2. Degrease, clean and dry 2219 and 3A21 parts;
[0049] 3. Assembly;
[0050]4. Using electron beam welding, the parameters are as follows: accelerating voltage 60-80KV, welding beam current 12-18mA, defocusing amount 0-2mm, welding speed 15-25mm / s;
[0051] 5. Check the quality of the weld and detect the leak rate of the weld, the leak rate is ≤6.7×10 -7 Pa.m 3 .s -1 .
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