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Ultrasonic-assisted eutectic reaction brazing method for dissimilar metal

A technology of eutectic reaction and brazing method, used in metal processing equipment, welding equipment, manufacturing tools, etc., to achieve the effects of low energy consumption, improved oxidation resistance, and fast welding speed

Inactive Publication Date: 2021-06-01
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the research on the ultrasonic welding of Mg-Al dissimilar metals with an interlayer mainly focuses on the effect of coating and tin foil on the performance of the joint, but there are few reports on the addition of an interlayer of zinc.

Method used

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  • Ultrasonic-assisted eutectic reaction brazing method for dissimilar metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Influence of Welding Energy on Joint Shear Strength

[0059] Cut the 0.1mm thick aluminum alloy and magnesium alloy into a square of 25mm×25mm, cut the 50μm thick zinc foil into a rectangle of 20mm×25mm, and then cut some of the cut aluminum alloy and magnesium alloy and zinc foil for pre-welding pretreatment and workpiece assembly. The rated power is 3000W, the working frequency is 20.11KHz, the power supply voltage is 200-240V, and the welding energy varies within the range of 200-2500J, which are respectively taken as 200J, 500J, 800J, 1100J, 1400J, 1700J, 2000J, 2500J for ultrasonic welding of Mg / Zn foil / Al dissimilar alloys.

[0060] The results show that with the increase of welding energy, the shear strength of the joint shows a trend of first increasing and then decreasing. When the welding energy is 1700J, the shear strength of the joint reaches the maximum.

Embodiment 2

[0062] Influence of Welding Amplitude on Shear Strength of Joint

[0063] Cut the 0.1mm thick aluminum alloy and magnesium alloy into a square of 25mm×25mm, cut the 50μm thick zinc foil into a rectangle of 20mm×25mm, and then cut some of the cut aluminum alloy and magnesium alloy and zinc foil for pre-welding pretreatment and workpiece assembly. The rated power is 3000W, the working frequency is 20.11KHz, the power supply voltage is 200-240V, and the welding amplitude changes within the range of 60%-100%, which are respectively taken as 65%, 75%, and 85%, 95%, ultrasonic welding of Mg / Zn foil / Al dissimilar alloys.

[0064] The results show that as the welding amplitude increases, the shear strength of the joint shows a gradual increase trend, and when the welding amplitude is 95%, the joint shear strength reaches the maximum.

Embodiment 3

[0066] Influence of Welding Static Pressure on Joint Shear Strength

[0067] Through the research of Examples 1 and 2, it can be known that the shear strength of ultrasonic welding of Mg / Zn foil / Al is the maximum when the welding energy is 1700J and the welding amplitude is 95%. Under the conditions of welding energy of 1700J and welding amplitude of 95%, the effect of welding static pressure on joint shear strength was studied. Cut the 0.1mm thick aluminum alloy and magnesium alloy into a square of 25mm×25mm, cut the 50μm thick zinc foil into a rectangle of 20mm×25mm, and then cut some of the cut aluminum alloy and magnesium alloy and zinc foil for pre-welding pretreatment and workpiece assembly. The rated power is 3000W, the working frequency is 20.11KHz, the power supply voltage is 200-240V, and the welding static pressure varies within the range of 0-0.65MPa, which are respectively taken as 0.2MPa, 0.3MPa, 0.4MPa, 0.5MPa, for ultrasonic welding of Mg / Zn foil / Al dissimilar...

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Abstract

The invention relates to an ultrasonic-assisted eutectic reaction brazing method for dissimilar metal, and belongs to the technical field of dissimilar material welding. The ultrasonic welding of a magnesium alloy and an aluminum alloy is carried out by adding a zinc intermediate layer, so that the generation of Mg-Al intermetallic compounds is successfully avoided, the welding quality and strength of a joint are improved, proper welding process parameters are adjusted to weld a workpiece, and the influence of different process parameters on the shear strength of a joint is researched, and the adjusted process parameters are as follows that the welding energy is 0-9999 J, the welding amplitude is 60%-100%, and the welding static pressure is 0-0.65 MPa. By means of parameter adjustment, a 0.1 millimeter magnesium alloy sheet and a 0.1 millimeter aluminum alloy sheet can be connected through dissimilar materials, and it is guaranteed that the welding joint is small in deformation, good in forming and free of welding defects such as cracks and air holes, when the welding energy is 1700 J, the welding amplitude is 95%, the welding static pressure is 0.4 MPa, the joint shear strength reaches the maximum and is 57.62 MPa, and compared with the Mg / Al ultrasonic welding process without a middle layer, the joint strength is improved by 89.66%.

Description

technical field [0001] The invention relates to the technical field of joining / welding of dissimilar materials, in particular to an ultrasonic-assisted eutectic reaction brazing method for dissimilar metals. Background technique [0002] With the rapid development of science and technology and industrial technology, driven by the automobile industry, the demand for lightweight, environmentally friendly, and energy-saving production is increasing. Using aluminum alloys and magnesium alloys instead of welding steel plates can reduce the structural weight by 50%. Therefore, the magnesium alloy / aluminum alloy composite component is an important way to reduce the weight of parts, realize the welding of magnesium alloy / aluminum alloy dissimilar metals, and obtain firm and reliable welded joints, which are also more and more highly valued by people. [0003] Since the physical and chemical properties of magnesium alloy and aluminum alloy are very different, and they are both very e...

Claims

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Application Information

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IPC IPC(8): B23K1/20B23K1/06
CPCB23K1/20B23K1/206B23K1/06
Inventor 谷晓燕高维
Owner JILIN UNIV
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