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Laser-electric arc hybrid welding method capable of reducing aluminum alloy welding pores

A composite welding and aluminum alloy technology, which is applied in welding equipment, laser welding equipment, metal processing equipment, etc., can solve the problems of welding seam inclusions and multiple processes, and achieve the effect of simple method, convenient operation and great use value

Inactive Publication Date: 2017-03-08
CHINA UNIV OF MINING & TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, it is necessary to pre-dry the niobium powder, and then mix it evenly with absolute ethanol or acetone. There are many processes and there are inclusions in the weld

Method used

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  • Laser-electric arc hybrid welding method capable of reducing aluminum alloy welding pores
  • Laser-electric arc hybrid welding method capable of reducing aluminum alloy welding pores
  • Laser-electric arc hybrid welding method capable of reducing aluminum alloy welding pores

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Such as figure 1 As shown, the method for reducing air holes in aluminum alloy laser-arc hybrid welding provided by the present invention has the following steps:

[0022] Step 1: before welding, the welded part 4 is polished or cleaned, and the welded part 4 after cleaning or grinding is fixed on the welding fixture;

[0023] Step 2: Select a suitable stranded welding wire 3: the diameter is 0.9-1.8mm, the fusion width of the weld is 3-6mm, and the penetration depth is 1-8mm;

[0024] Step 3: Determine the welding parameters;

[0025] Step 4: Start the control switch, pass the shielding gas first, then the welding torch 2 triggers the welding arc, and the laser light source emits the laser beam 1 for welding.

[0026] figure 2 A cross-section of one of the usable stranded welding wires 3 is provided, with flux-cored wire B as the core wire, solid cored wir...

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Abstract

The invention discloses a laser-electric arc hybrid welding method capable of reducing aluminum alloy welding pores and belongs to the field of laser hybrid welding. The method adopts a stranded welding wire for replacing a common aluminum alloy welding wire and adopts a laser-electric arc hybrid heat source for welding aluminum alloy. The stranded welding wire is adopted for mainly applying the specific rotary welding electric arc shape of the stranded welding wire, so that liquid metal in a molten pool flows in an eddy current type; and strong agitation is produced to fluid in the molten pool, and overflow of gas in molten metal and uniform distribution of beneficial elements in the molten pool can be benefited, so that weld defects are reduced, and the welding quality is improved. By adopting the welding method disclosed by the invention, production of welding pores can be effectively reduced, the operation is simple and convenient, and no extra complex equipment is adopted.

Description

technical field [0001] The invention relates to a laser-arc composite welding method for reducing aluminum alloy welding pores. Background technique [0002] Aluminum alloy has the characteristics of low density, high strength, good processing and plasticity, and is widely used in the fields of automobile, machinery manufacturing, chemical industry, shipbuilding and aerospace. During the welding process of aluminum alloy, the solubility of the hydrogen contained in the atmosphere environment and the aluminum alloy itself drops sharply during the solidification process of the welding molten pool, resulting in the hydrogen dissolved in the molten pool at the high temperature stage having no time to escape and remaining in the weld seam, resulting in welding failure. It is very easy to produce pores. Welding porosity can not only destroy the compactness of the weld metal and weaken the effective cross-sectional area of ​​the weld, but also reduce the load-bearing area of ​​the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/348B23K26/60B23K103/10
CPCB23K26/348B23K26/60B23K2103/10
Inventor 樊宇孙智任耀剑徐杰叶展陈昆李沛智郭跃
Owner CHINA UNIV OF MINING & TECH
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