A laser-arc hybrid welding method for invar die steel

A composite welding and mold steel technology, applied in laser welding equipment, welding medium, welding equipment, etc., can solve the problems of poor weld formation, poor fusion between layers, low production efficiency, etc., and achieve a large total depth-to-width ratio of the weld , Good interlayer fusion effect, small deformation after welding

Active Publication Date: 2017-06-13
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] For above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of laser-arc hybrid welding method of Invar mold steel, solves the poor interlayer fusion that exists when the arc welding technology thick plate Invar steel exists in the prior art, crack clamping More slag, poor weld formation, low production efficiency, etc., the method of the present invention can obtain thick plate Invar die steel butt joints with stable weld quality while greatly improving production efficiency

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  • A laser-arc hybrid welding method for invar die steel
  • A laser-arc hybrid welding method for invar die steel
  • A laser-arc hybrid welding method for invar die steel

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Embodiment 1

[0030] The welding base material is Invar steel with a Ni content of 35.87%, with a size of 100mm×50mm×19.05mm, a 30° groove, a blunt edge thickness of 6mm, and a spacing of 0.8mm; the welding wire is Invar M93, with a Ni content of 35.87%, and a diameter of 1.2mm ; 99.9% Ar atmosphere flow rate is 15L / min; welding equipment is KUKA robot KR30HA, TPS-5000 Fronius welding machine, IPG YLS-6000 fiber laser; before welding, finely grind the vicinity of the groove to remove residual residue on the surface of the sample Rust and other impurities, use acetone to wipe and clean the sample to remove residual oil to ensure that the surface of the sample is clean; then teach the welding trajectory and set the parameters. The specific parameters are as follows:

[0031] The first layer (first layer 13): straight line trajectory, laser power 5500W, welding current 240A, welding voltage 24.3V, speed 1m / min;

[0032] The second layer (first filling layer 12): straight track, laser power 200...

Embodiment 2

[0036] The welding base material is Invar steel with a Ni content of 35.87%, with a size of 100mm×50mm×19.05mm, a 30° groove, a blunt edge thickness of 6mm, and a spacing of 0.8mm; the welding wire is Invar M93, with a Ni content of 35.87%, and a diameter of 1.2mm ; 99.9% Ar atmosphere flow rate is 15L / min; welding equipment is KUKA robot KR30HA, TPS-5000 Fronius welding machine, IPG YLS-6000 fiber laser; before welding, finely grind the vicinity of the groove to remove residual residue on the surface of the sample For impurities such as rust, use acetone to wipe and clean the sample to remove residual oil to ensure that the surface of the sample is clean; then teach the welding trajectory and set the parameters. The specific parameters are as follows:

[0037] The first layer (second layer 23): laser power 5500W, welding current 240A, welding voltage 24.3V, speed 1m / min;

[0038] The second layer (second filling layer 22): laser power 2400W, welding current 250A, welding volt...

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Abstract

The invention discloses a laser-arc hybrid welding method for Invar die steel. The laser-arc hybrid welding method comprises the following steps: choosing a welding material; designing a groove shape of a weldment made of an Invar steel thick plate and making preparations before welding; planning a laser-arc hybrid welding path of the Invar die steel thick plate; and designing parameters of a laser-arc hybrid welding process for the Invar die steel thick plate. By reasonably employing a laser-arc hybrid welding technology, welding of dedicated thick plate Invar die steel for composite parts of a large aircraft is finished by the laser-arc hybrid welding method disclosed by the invention.

Description

technical field [0001] The invention belongs to the technical field of nickel-based alloy high-energy beam welding, and in particular refers to a laser-arc composite welding method for Invar die steel. Background technique [0002] Due to a series of advantages such as small specific gravity, high strength, and good fatigue performance, composite materials can bring comprehensive benefits such as reducing the body structure, extending maintenance intervals, and reducing operating costs when applied to aerospace products, so they become one of the key materials for large aircraft manufacturing. one. Composite parts are compounded and finally formed in the mold, and the outer surface of the formed part does not need any processing, which puts forward certain requirements for the mold material: stability under changing temperatures, compatibility with composite materials Consistent thermal expansion coefficient, good stability in vacuum environment and low manufacturing cost, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/348B23K26/60B23K35/30B23K33/00
CPCB23K26/348B23K26/60B23K33/004B23K35/3066
Inventor 占小红陈纪城张聃王宇博魏艳红
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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