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A technology of dissimilar aluminum alloys and welding methods, applied in laser welding equipment, welding equipment, welding/welding/cutting items, etc., can solve the problems of weld undercut, pits and porosity weld defects, and achieve good performance, The effect of internal quality satisfaction
Active Publication Date: 2019-12-06
BEIJING HANGXING MACHINERY MFG CO LTD
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[0004] Due to the difference in physical and chemical properties between the 5A06 aluminum alloy and the ZL114A aluminum alloy, when the welding depth of the 5A06 aluminum alloy and the ZL114A aluminum alloy is 3 to 5 mm, there is still undercut, Pit and Porosity Weld Defects
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Embodiment example 1
[0045] This embodiment provides a 4mm thick 5A06 aluminum alloy plate and a 4mm thick ZL114A aluminum alloy plate butt joint laser swing welding method, which specifically includes:
[0046] (1) Before laser welding, clean the scale, oil and other impurities within 20mm from the center of the weld, place the 5A06 aluminum alloy plate and the ZL114A aluminum alloy plate directly on the workbench, and fix them with a pressure plate;
[0047] (2) The seams of the two are welded by the oscillating laser welding process. During oscillating welding, the laser power P is 4500W, the laser beam is vertically incident, the welding speed ν is 1800mm / min, the spot diameter D is 0.3mm, and the defocusing amount l is 0mm, the swing frequency f is 300Hz, the swing amplitude h is 3mm, and the swing mode adopts "8" mode; high-purity argon gas with a mass concentration of 99.9% is used for front and back protection, the front gas flow is 16L / min, and the back gas flow 4L / min;
[0048] (3) Afte...
Embodiment example 2
[0051] This embodiment provides a 5mm thick 5A06 aluminum alloy plate and a 5mm thick ZL114A aluminum alloy plate butt joint laser swing welding method, which specifically includes:
[0052] (1) Before laser welding, clean the scale, oil and other impurities within 20mm from the center of the weld, place the 5A06 aluminum alloy plate and the ZL114A aluminum alloy plate on the workbench, and fix them with a pressure plate;
[0053] (2) The seams of the two are welded by the oscillating laser welding process. During oscillating welding, the laser power P is 4800W, the laser beam is vertically incident, the welding speed ν is 1800mm / min, the spot diameter D is 0.3mm, and the defocusing amount l is 0mm, the swing frequency f is 300Hz, the swing amplitude h is 2mm, and the swing mode adopts "O" mode; high-purity argon gas with a mass concentration of 99.99% is used for front and back protection, the front gas flow is 17L / min, and the back gas flow 4L / min;
[0054] (3) After the we...
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Abstract
The invention provides a 5A06 / ZL114A dissimilar aluminum alloy part butt joint laser swing welding method, and belongs to the technical field of welding. The method comprises the following steps thata 5A06 aluminum alloy part and a ZL114A aluminum alloy part are placed in a butt joint mode to form a structure to be welded, wherein the welding depth of the structure to be welded is 3-5 mm; the structure to be welded is welded through adopting a laser swing welding process to obtain an initial welding part; during welding, an incident angle of a laser beam is 90 degrees, the laser power is 4500-5000W, the welding speed is 1500-1800 mm / min, the light spot diameter is 0.2-0.3 mm, the defocusing amount is -1-1 mm, the swing frequency is 100-300 Hz, and the swing amplitude is 1-3 mm; laser swing welding is carried out on the initial welding part again to obtain a final product; and during welding, the incident angle of the laser beam is 80-85 degrees, the laser power is 1000-2000W, the welding speed is 2000-2200 mm / min, the light spot diameter is 0.1-0.2 mm, the defocusing amount is 3-6 mm, the swing frequency is 200-300 Hz, and the swing amplitude is 2.5-3 mm. A weld joint obtained bythe method has no undercut, no pits, no salient points, and no air holes at the surface or the near surface, the internal quality meets the GB / T 22085.2-2008 standard strict B-level requirement, and no internal cracks or no air holes exist.
Description
technical field [0001] The invention relates to the field of welding technology, and in particular provides a laser swing welding method for the butt joint of 5A06 / ZL114A dissimilar aluminum alloy thin-walled parts. Background technique [0002] With the application and development of aerospace technology, the application of aluminum alloys in this field is becoming more and more extensive. Aluminum alloy materials can effectively reduce product weight and improve product performance. Laser welding energy is highly concentrated, which can significantly increase welding speed and achieve high-precision, low-distortion welding characteristics. Aluminum alloy laser welding can greatly increase the processing speed and reduce post-weld deformation, which has obvious advantages compared with traditional joining methods. However, the stability of the welding process of aluminum alloy laser welding is poor, and the plasma fluctuation is large, which is easy to form forming defect...
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