Cold metal transfer welding process of magnesium alloy thin-walled workpiece
A technology of cold metal transition and welding process, which is applied in the direction of metal processing equipment, welding equipment, welding accessories, etc. It can solve the problems of low mechanical properties of welded parts, large welding deformation, and coarse structure, and achieve improved appearance quality and welding heat. The effect of small input and fine organization
Inactive Publication Date: 2017-05-03
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology
[0006] To sum up, the defects of the existing welding technology are: easy welding penetration, large welding deformation, coarse structure in the affected area of the weld, and low mechanical properties of the welded parts after welding, which are the crux of the large-scale application of magnesium and its alloys.
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Embodiment A1-A5
[0050] In Examples 1-5, five AZ31 magnesium alloy thin-walled parts were welded respectively.
[0051] The welding of the magnesium alloy thin-walled parts is realized by the cold metal transition welding process of the magnesium alloy thin-walled parts of the present invention, which sequentially comprises the steps:
[0052] 1) Cleaning and grinding: Use grinding tools to grind and clean the parts to be welded of the magnesium alloy thin-walled parts to remove the oxide film and oil stains on the surface;
[0053] 2) Place the backing plate: place the backing plate under the joint of the magnesium alloy thin-walled parts to ensure that the magnesium alloy thin-walled parts are welded through but not welded through or collapsed;
[0054] 3) Cold metal transfer welding: Fix the seam position between magnesium alloy thin-walled parts, adopt the cold metal transfer welding process, and control the process parameters of the cold metal transfer welding step to meet the following r...
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Abstract
The invention discloses a cold metal transfer welding process of a magnesium alloy thin-walled workpiece. According to the process parameters of the cold metal transfer welding steps of the process, the diameter of a welding wire ranges from 0.5 mm to 3 mm; the welding current ranges from 80 A to 150 A, and the welding voltage ranges from 8 V to 15 V; the flow of argon shielding gas ranges from 10 L / min to 20 L / min; the welding speed ranges from 12 mm / s to 25 mm / s; and the wire feeding speed ranges from 3.5 m / min to 4.5 m / min. A welding joint obtained through the cold metal transfer welding process is excellent in mechanical property, and especially the welding joint is high in strength and good in malleability. In addition, the welding joint obtained through the welding process is orderly in appearance and does not deform. In addition, the welding process is simple and practicable, convenient to operate, high in efficiency and low in cost. Meanwhile, in the process of implementing the welding process, no residual material splashes.
Description
technical field [0001] The invention relates to a metal welding process, in particular to a magnesium alloy welding process. Background technique [0002] Magnesium is the lightest of commonly used metal structural materials, with a specific gravity of only 1.7g / cm 3 About 1 / 4 of steel and 2 / 3 of aluminum. Magnesium and magnesium alloys have the three advantages of rich resources, energy saving, and environmental friendliness, and are lightweight structural materials and functional materials with high specific strength. They are recognized by the world as "the most promising emerging materials in the 21st century" . my country is rich in magnesium resources, and the industrialization of magnesium alloys has already become one of the national science and technology strategic development directions. At present, many research institutes, universities and enterprises have participated in the national research project on magnesium materials, and are committed to promoting the ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B23K9/16B23K9/23B23K9/095B23K9/235B23K9/32
CPCB23K9/0035B23K9/095B23K9/164B23K9/23B23K9/235B23K9/32B23K2103/08
Inventor徐世伟唐伟能潘华苏永超蒋浩民张丕军
OwnerBAOSHAN IRON & STEEL CO LTD