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Laser and MIG (metal-inert gas) arc composited welding method for high-nitrogen steel

A technology of hybrid welding and high nitrogen steel, applied in the field of hybrid welding of laser and MIG, to achieve the effect of small deformation of workpiece, uniform distribution and fast welding speed

Inactive Publication Date: 2013-02-20
NO 52 INST OF CHINA NORTH IND GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a high-nitrogen steel laser MIG arc hybrid welding method with the characteristics of small nitrogen loss and uniform distribution, large welding penetration, high welding efficiency, and small workpiece deformation in view of the above-mentioned technical status quo

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  • Laser and MIG (metal-inert gas) arc composited welding method for high-nitrogen steel
  • Laser and MIG (metal-inert gas) arc composited welding method for high-nitrogen steel

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Example 1, such as figure 1 As shown, the installation requirements of laser beam 1, MIG welding torch 2 and welding test plate 3 are arranged, and F is the welding direction. Where b is the angle between the MIG welding torch 2 and the welding test plate 3, c is the angle between the laser welding torch and the welding test plate 3, and a is the distance between heat sources.

[0036] The laser-MIG arc hybrid welding process of medium-thickness high-nitrogen steel containing 0.6% nitrogen in this embodiment is a single-sided welding and double-sided forming process, and the thickness of the welded high-nitrogen steel plate is 8 mm. It includes the following steps: (1) Design the joint form And the welding method, using single-sided welding without groove, the butt gap between the two welding test plates is 0mm; (2) Set the laser-MIG arc composite welding composite method as laser beam in front, MIG arc in the back, the distance between the two composite heat sources (...

Embodiment 2

[0037] Embodiment 2, the laser-MIG arc hybrid welding process of medium-thickness high-nitrogen steel containing 0.6% nitrogen in this embodiment is a double-sided welding process, and the thickness of the welded high-nitrogen steel plate is 16mm. It includes the following steps: (1) Design joints For the form and welding method, double-sided welding without groove is adopted, and the butt gap between the two welding test plates is 0mm; (2) The laser-MIG hybrid welding method is set to be the laser beam in front and the MIG arc behind, and the distance between the two composite heat sources (3) Set the MIG welding shielding gas, obtain the mixed gas of helium, nitrogen and argon with a volume ratio of 2:3 through the gas mixing valve, and set the welding shielding gas flow rate of the MIG welding machine to 25L / min ; (4) Set the MIG welding process specification, the welding current range is 230A, and the dry elongation of the welding wire is 14mm; (5) Set the laser welding pow...

Embodiment 3

[0038] Example 3, combined with figure 2 As shown, where f is the angle of the break, e is the blunt edge, and d is the thickness of the high nitrogen steel. The laser-MIG composite welding process of the medium-thickness high-nitrogen steel containing 0.6% nitrogen in this embodiment is a double-sided welding process, and the thickness of the welded high-nitrogen steel plate is 20mm. It includes the following steps: (1) Design the joint form and welding method, Attached figure 2 Design the groove of the joint, and adopt double-sided welding, and the butt gap is 0mm; (2) Set the composite mode of laser-MIG hybrid welding as laser beam in front, MIG arc behind, and the distance between the two composite heat sources is 3mm; (3) Set Set the MIG welding shielding gas, obtain the mixed gas of helium, nitrogen and argon with a volume ratio of 2:3 through the gas mixing valve, and set the welding shielding gas flow rate of the MIG welding machine to 30L / min; (4) Set the MIG Weld...

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Abstract

The invention discloses a laser and MIG (metal-inert gas) arc composited welding method for high-nitrogen steel. The laser and MIG arc composited welding method is characterized by comprising the following steps of: design of a welding joint; design of a welding mode; setting of a composite way and heat source spaces; selection of protective gas for the composite welding; setting of welding technology parameters according to the composite way; and synchronous implementation of the composite welding. Compared with the prior art, the laser and MIG arc composited welding method has the advantages of being capable of implementing the welding of the high-nitrogen steel with middle thickness and achieving weld joints which have clean and smooth surfaces and are good in forming and free from sunken parts; and meanwhile, the welding method has the characteristics of low loss and uniform distribution of nitrogen elements at connectors, high welding penetration, high welding speed, small deformation of workpieces, low assembly requirements and the like.

Description

technical field [0001] The invention relates to a composite welding method of laser and MIG, which belongs to the technical field of welding. Background technique [0002] Welding technology is an indispensable key manufacturing technology in the modern manufacturing industry, and has penetrated into various production fields of the modern machinery manufacturing industry. High quality and high efficiency have become a sign to measure whether a welding method and welding process are excellent. [0003] Laser-MIG arc hybrid welding is a new type of welding technology, which is formed by the interaction and superposition of laser and MIG arc (melting inert gas arc welding), two heat sources with different physical properties and energy transmission mechanisms. A high-energy-efficiency heat source acting on the same molten pool, through the mutual coordination and recombination of the two heat sources, the laser acting on the molten pool has high energy absorption rate and wel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K28/02B23K26/348
Inventor 马志华陈东高刘红伟任宝辉王法科马冰杨武林冯胜强陈东亮石磊郑子云明珠
Owner NO 52 INST OF CHINA NORTH IND GRP CORP
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