Method adopting double-beam laser and TIG composite filler wire fusing-brazing for dissimilar materials

A dissimilar material and double-beam technology, applied in welding equipment, welding equipment, arc welding equipment, etc., can solve the problems of welding penetration, large heat input of MAG, etc., and achieve the effect of improving adaptability, improving thermal efficiency, and efficient connection

Active Publication Date: 2018-05-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent 200610007614 discloses a method for joining dissimilar metals with a large-spot laser and an arc composite heat source. The wettability of the weld metal has been greatly improved by using MAG. May cause defects such as weld penetration

Method used

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  • Method adopting double-beam laser and TIG composite filler wire fusing-brazing for dissimilar materials
  • Method adopting double-beam laser and TIG composite filler wire fusing-brazing for dissimilar materials
  • Method adopting double-beam laser and TIG composite filler wire fusing-brazing for dissimilar materials

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specific Embodiment approach 1

[0028] Specific implementation mode one: combine figure 1 Description of this embodiment, a dual-beam laser-TIG composite wire-filling fusion brazing method for dissimilar materials, which is carried out according to the following steps:

[0029] Step 1: Before welding, process the parts to be welded into Y-shaped grooves, I-shaped grooves or asymmetrical grooves according to the plate thickness, and grind the processed grooves and the surfaces on both sides Or cleaning, fix the workpiece to be welded after grinding or cleaning on the welding fixture;

[0030] Step 2: Use the fixture to rigidly fix the laser head, TIG welding torch and wire feeding mechanism;

[0031] Step 3: Set welding process parameters:

[0032] The laser power is 1kW~4kW, the power ratio of the two laser beams is 1:1~1:10, the defocus range is -2~+10mm, the distance between the centers of the two laser beams is 2~6mm, and Ar gas is used for protection. 15L / min~50L / min; arc current 30~90A, welding speed...

specific Embodiment approach 2

[0035] Specific implementation mode two: combination figure 1 This embodiment is described. The difference between this embodiment and the first embodiment is that the dissimilar materials are steel and non-ferrous metal dissimilar materials or dissimilar non-ferrous metal materials. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0036] Specific implementation mode three: combination figure 1 Describe this embodiment, the difference between this embodiment and specific embodiment 1 is: the laser used in welding is CO 2 Gas laser, YAG solid-state laser, semiconductor laser or fiber laser. Others are the same as in the first embodiment.

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Abstract

The invention relates to a method adopting double-beam laser and TIG composite filler wire fusing-brazing for dissimilar materials, and relates to the field of material processing engineering. According to the method, the problems existing in the laser-arc composite welding process of the dissimilar materials are solved. Lasers and TIG electric arcs are applied to dissimilar material welding in acomposite mode, the two beams of lasers with different energies are arranged in parallel, and the two light beams act on grooves of mother materials on two sides respectively. According to the methodfor fusing-brazing, distribution of a welding temperature field can be controlled, the welding stability and the heat efficiency are improved, the adaptability to a welding joint is improved, the microstructure of the welding joint is improved, and the welding defect is reduced.

Description

technical field [0001] The invention belongs to the field of material processing engineering, and in particular relates to a double-beam laser-TIG composite wire-filling fusion brazing method for dissimilar materials. Background technique [0002] The development of modern industry and the advancement of science and technology have put forward higher and more stringent requirements for the performance of welded components. In addition to the usual mechanical properties, there are also high-temperature strength, wear resistance, corrosion resistance, and low-temperature toughness. , magnetism, electrical conductivity, thermal conductivity and many other performance requirements. In this case, it is impossible for any kind of metal material to fully meet the requirements of the overall welded structure. Therefore, various departments of modern industrial production will inevitably and often encounter the problem of dissimilar material welding. [0003] The characteristic of ...

Claims

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Application Information

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IPC IPC(8): B23K1/005B23K9/167B23K28/02
CPCB23K1/0008B23K1/005B23K9/0026B23K9/167B23K28/02
Inventor 雷正龙郭亨通秦熙琨王宇周兰博薛云航
Owner HARBIN INST OF TECH
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