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Method for regulating intermetallic compound for dissimilar material overlap joint through laser-arc double-sided welding

A technology of intermetallic compounds and lap joints, which is applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of poor mechanical properties of joints and difficult control of the thickness of intermetallic compounds, etc., so as to improve the weld structure and excellent Joint performance, effect of delaying cooling time

Inactive Publication Date: 2011-04-27
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention solves the technical problem that the thickness of the intermetallic compound generated during lap welding of dissimilar materials is not easy to control, resulting in poor mechanical properties of the joint; and provides a laser-arc double-sided welding method for regulating the intermetallic compound of the lap joint of dissimilar materials

Method used

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  • Method for regulating intermetallic compound for dissimilar material overlap joint through laser-arc double-sided welding
  • Method for regulating intermetallic compound for dissimilar material overlap joint through laser-arc double-sided welding
  • Method for regulating intermetallic compound for dissimilar material overlap joint through laser-arc double-sided welding

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specific Embodiment approach 1

[0009] Embodiment 1: In this embodiment, the laser-arc double-sided welding method for regulating the intermetallic compound of the lap joints of dissimilar materials is as follows: pre-set solder between the lap joints of dissimilar materials, and then place the laser beam and the arc on the lap joints respectively. The two sides of the joint are symmetrically heated and welded at the same time, among which the laser beam deep penetration welding on the low melting point material side, and the arc solder brazing welding on the high melting point material side.

specific Embodiment approach 2

[0010] Embodiment 2: This embodiment is different from Embodiment 1 in that: the brazing filler metal is welding wire or an intermediate layer. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0011] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the type of laser beam is CO 2 Gas laser beam, YAG solid-state laser beam, semiconductor laser beam or fiber laser beam. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for regulating an intermetallic compound for a dissimilar material overlap joint through laser-arc double-sided welding, relates to a method for overlapping and welding dissimilar materials, and aims to solve the technical problems that the produced intermetallic compound has hardly controlled thickness and a joint has poor mechanical property in the process of overlapping and welding the dissimilar materials. The method comprises the following steps of: prearranging brazing filler metals between overlap joints of the dissimilar materials, respectively arranging laser beams and arcs on two sides of the overlap joints and symmetrically heating and welding simultaneously, wherein the laser beams on the side of low-melting point materials are subjected to deep penetration welding, and the arcs on the side of high-melting point materials are brazed with the brazing filler metals. In the method, the laser beams are arranged on the side of the low-melting point materials to be subjected to deep penetration welding so as to be subjected to fusion welding with the brazing filler metals, and the arcs are arranged on the side of the high-melting point materials to be subjected to heat conduction welding so as to be brazed with the brazing filler metals; and the optimized interlayer reaction thickness is realized and excellent joint performance is achieved by controlling energy matching under the coaction of the laser and the arcs. The method is applied to the field of dissimilar material welding.

Description

technical field [0001] The invention relates to a method for lap joint welding of dissimilar materials. Background technique [0002] With the development of new materials and new processes, composite structures of dissimilar materials have great application potential in industrial fields such as aviation, aerospace and automobiles, and the first thing to realize the wide application of composite structures of dissimilar materials is to solve the welding problem of dissimilar materials. The ideal condition is that the two materials have complete miscibility and form a solid solution. In many cases, due to the large difference in physical and chemical properties of the two materials to be welded, brittle intermetallic compounds or eutectics will be produced, and it is difficult to obtain welded joints with excellent mechanical properties. [0003] For dissimilar materials with large differences in physical and chemical properties, on the one hand, intermetallic compounds are...

Claims

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Application Information

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IPC IPC(8): B23K31/02
Inventor 李俐群陈彦宾赵耀邦
Owner HARBIN INST OF TECH
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