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Aluminum alloy laser focus rotation wire-filling welding method

A welding method and focus technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problem of low mechanical properties of joints, improve weld morphology, refine weld grains, and inhibit porosity. Effect

Inactive Publication Date: 2018-06-29
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Relevant studies have shown that the mechanical properties of the joints after aluminum alloy wire filling are still lower than those of the base metal, and there is room for further process improvement

Method used

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  • Aluminum alloy laser focus rotation wire-filling welding method
  • Aluminum alloy laser focus rotation wire-filling welding method
  • Aluminum alloy laser focus rotation wire-filling welding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The welding process parameters of Embodiment 1 are shown in the following table, wherein, P is the laser power, F is the focus rotation frequency, r is the focus rotation radius, and W x is the light wire spacing, v is the welding speed, and w is the wire filling speed.

[0015]

[0016] The material used in Example 1 is 2060 aluminum-lithium alloy, the sample size is 100mm × 60mm × 2mm, the surface oxide film is removed with NaOH solution before welding, and 30% HNO 3 Solution neutralizes residual lye. Use 1.2mm 4047Al-Si welding wire. Argon gas shielding (output from sideshaft nozzle 4) is adopted, and the shielding gas flow rate is 25L / min. The weld type is a butt weld.

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Abstract

The invention discloses an aluminum alloy laser focus rotation wire-filling welding method and belongs to the technical field of laser welding. The method is characterized in that a laser focus performs uniform circular motion on the surface of an aluminum alloy workpiece by a certain radius and at a certain frequency; and within each rotation cycle of the focus, laser can alternately acts on thetail end of a welding wire and the surface of the workpiece, and thus the effects that flow of a molten bath, the solidification behavior and fusion transitional behavior of the welding wire are adjusted and controlled actively are achieved. Compared with a traditional laser wire-filling welding method, the method has the beneficial effects that air holes are effectively inhibited, the form and appearance of a welding seam are improved, grains of the welding seam are refined, and the joint strength is improved.

Description

technical field [0001] The invention relates to an aluminum alloy laser focus rotary wire filling welding method, which belongs to the technical field of laser welding. Background technique [0002] Compared with traditional arc welding, laser welding has outstanding advantages such as high energy density, fast welding speed, good processing flexibility, and small structural deformation after welding. Especially with the rapid development and popularization of high-power fiber lasers in recent years, fiber laser welding technology It has been widely used in the industrial field, especially for metal materials such as aluminum alloys with high laser reflectivity. However, due to material characteristics such as low density of aluminum alloy, easy burning of alloy elements, and high thermal conductivity, there are still problems such as difficult elimination of hydrogen pores, large crack tendency, and serious joint softening during laser self-fluxing welding. Due to the smal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/211B23K103/10
CPCB23K26/211
Inventor 肖荣诗李新桐武强
Owner BEIJING UNIV OF TECH
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