Multi-beam-assisted laser-arc composite welding method

A hybrid welding and arc technology, which is applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of application limitations of high-intensity electromagnetic fields, and achieve the effects of preventing component segregation, ensuring stability, and suppressing nitrogen overflow

Active Publication Date: 2019-12-13
HARBIN INST OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of high-intensity electromagnetic field in the welding process of high-nitrogen steel and other materials in the laser-arc composite heat source welding process. To solve the problem of offset, a multi-beam assisted laser-arc hybrid welding method is provided to improve arc stability and alloy the weld

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  • Multi-beam-assisted laser-arc composite welding method

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specific Embodiment approach 1

[0027] Specific embodiment one: a kind of multi-beam assisted laser-arc hybrid welding method of the present embodiment, it is carried out according to the following steps:

[0028] Step 1: Before welding, according to the plate thickness, process the groove of the workpiece to be welded or directly perform surface cladding, grind and clean the processed groove or surface, and fix the polished and cleaned workpiece to be welded on the welding fixture superior;

[0029] Step 2: Use a clamp to rigidly fix the laser head and the arc welding torch. The angle between the axis of the welding torch and the base metal is 30-50°. Use a clamp to fix the powder feeding pipe around the nozzle of the welding torch. The number of powder feeding pipes is 3 to 6. The axis is aligned with the arc, and a conical tube can be added to the front end of the powder feeding tube to constrict the air flow, and each powder feeder is preset with 100g of required alloy powder;

[0030] Step 3: Set weldi...

specific Embodiment approach 2

[0033] Embodiment 2: The difference between this embodiment and Embodiment 1 is that processing the groove refers to processing the part to be welded into a V-shaped groove, an I-shaped groove or a Y-shaped groove.

[0034] Others are the same as in the first embodiment.

specific Embodiment approach 3

[0035] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the laser is CO 2 Gas laser, YAG solid-state laser or semiconductor laser.

[0036] Others are the same as in the first embodiment.

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Abstract

The invention discloses a multi-beam-assisted laser-arc composite welding method, relates to the field of material processing engineering, and aims to solve the problems that the application of a high-intensity electromagnetic field in welding is limited in the process of laser-arc composite heat source welding of materials of high-nitrogen steel and the like, alloy elements need to be additionally supplemented in welding, and arc deviation occurs under the condition of powder feeding. According to the multi-beam-assisted laser-arc composite welding method, with a wire / tungsten electrode as axis, a plurality of powder feeding pipelines are additionally arranged on a welding gun nozzle, the axes of the powder feeding pipelines are aligned near the welding wire end / tungsten electrode tip andadjustable in the direction perpendicular to the welding wire / tungsten electrode axis. The multi-beam-assisted laser-arc composite welding method is applied to the field of welding.

Description

technical field [0001] The invention relates to the field of material processing engineering, in particular to a multi-beam assisted laser-arc hybrid welding method. Background technique [0002] High-nitrogen steel has strength, good impact toughness, and corrosion resistance, and nitrogen substitution for nickel brings production economy and good biocompatibility, and has broad application prospects in bulletproof armor, transportation pipelines, and medical devices. However, due to the characteristics of high nitrogen steel, its weldability is poor, and there are problems such as loss of solid solution nitrogen, significant pore defects, and precipitation of nitrides. At present, the method of mixed nitrogen protection is generally used to prevent nitrogen overflow, but there is no more effective nitrogen fixation and nitrogen increase method, and the addition of nitrogen will cause other defects in the weld or the welding process will become unstable. [0003] Laser-arc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/348B23K26/70
CPCB23K26/348B23K26/70
Inventor 雷正龙黎炳蔚吴世博陈彦宾
Owner HARBIN INST OF TECH
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