A copper/steel composite material connection method with a preset joint

A connection method and composite material technology, applied in the field of copper/steel composite material connection, can solve the problems of welding structure failure, reduce joint strength, etc., and achieve the effect of reducing welding difficulty, reducing the difference in thermophysical properties, and improving welding efficiency

Active Publication Date: 2022-07-05
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the penetrating cracks formed on the steel side will reduce the strength of the joint, and the cracks may expand and extend over time to penetrate the entire welded joint, causing the welded structure to fail

Method used

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  • A copper/steel composite material connection method with a preset joint
  • A copper/steel composite material connection method with a preset joint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1, prepare a preset joint with CHW50C6 carbon steel welding wire of φ1.2mm and S211 silicon bronze welding wire. A welding robot is used to complete the additive preparation of the preset joints. The joint specifications are 100 × 5 × 5 mm. Each material is surfacing with three layers, and each layer of weld bead must be polished with a wire brush to prevent inclusions. The specific additive preparation parameters are: ① Preparation of the steel side preset joint: the welding current is 190A, the welding voltage is 21V, the welding speed is 5mm / s, the volume fraction is 90% Ar + the volume fraction is 10% CO 2 The sum of the volume percentages of the above components is 100%, and the gas flow rate is 15L / min; ②Preparation of the copper side preset joint: The welding current is 210A, the welding voltage is 22V, the welding speed is 4mm / s, and the volume of the inert protective gas is Pure argon with a ratio of 99.99% and a flow rate of 15L / min.

[0035] Step 2: Cle...

Embodiment 2

[0038] Step 1, prepare a preset joint with CHW50C6 carbon steel welding wire of φ1.2mm and S211 silicon bronze welding wire. A welding robot is used to complete the additive preparation of the preset joints. The joint specifications are 100 × 5.5 × 5 mm. Each material is surfacing with three layers, and each layer of weld bead must be polished with a wire brush to prevent inclusions. The specific additive preparation parameters are: ① Preparation of the steel side preset joint: the welding current is 200A, the welding voltage is 22V, the welding speed is 5.5mm / s, the volume fraction is 90% Ar + the volume fraction is 10% CO 2The sum of the volume percentages of the above components is 100%, and the gas flow rate is 16L / min; ②Preparation of the copper side preset joint: The welding current is 220A, the welding voltage is 23V, the welding speed is 4.5mm / s, and the inert protective gas is The volume percentage of pure argon is 99.99%, and the flow rate is 16L / min.

[0039] Step ...

Embodiment 3

[0042] Step 1, prepare a preset joint with CHW50C6 carbon steel welding wire of φ1.2mm and S211 silicon bronze welding wire. A welding robot is used to complete the additive preparation of the preset joints. The joint specifications are 100 × 6.5 × 5 mm. Each material is surfacing with three layers, and each layer of weld bead must be polished with a wire brush to prevent inclusions. The specific additive preparation parameters are: ① Preparation of the steel side preset joint: the welding current is 205A, the welding voltage is 23.5V, the welding speed is 6.5mm / s, the volume fraction is 90% Ar+ The volume fraction is 10% CO 2 The sum of the volume percentages of the above components is 100%, and the gas flow rate is 16L / min; ②Preparation of the copper side preset joint: the welding current is 235A, the welding voltage is 25V, the welding speed is 5mm / s, and the volume of the inert protective gas is The percentage of pure argon is 99.99%, and the flow rate is 16L / min.

[0043...

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Abstract

The invention discloses a method for connecting copper / steel composite materials with preset joints. The specific operation steps are as follows: Step 1: preparation of copper-steel preset joints: using arc additive technology to prepare copper-steel composite welds of reasonable specifications, as Preset joint; Step 2: According to the composition of the base metal, select the solid welding wire of the same composition, and use MIG welding to complete the welding of the copper test plate, the steel test plate and the copper-steel preset joint. The method of the invention can improve the welding quality and comprehensive mechanical properties of the copper-steel dissimilar metal welded joint, and provides a new idea for the connection of copper / steel dissimilar metals.

Description

technical field [0001] The invention belongs to the technical field of dissimilar metal welding, and in particular relates to a copper / steel composite material connection method with a preset joint. Background technique [0002] In the field of industrial manufacturing, the welded structure made of a single metal can no longer meet the requirements of use. Therefore, in order to ensure the performance of the welded structure, in most cases, composite materials are used instead of single materials to meet the requirements of both economic efficiency and structural strength. In the field of large-scale transformer oil tank manufacturing, almost all of them are welded with copper and steel dissimilar metals. This structure has the advantages of shielding external magnetic fields, increasing the heat dissipation speed, and ensuring the strength of the box. [0003] However, the welding of copper and steel dissimilar metals is more difficult. This is because the physical and che...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/173B23K9/04B23K35/38B33Y10/00
CPCB23K9/173B23K9/044B23K35/383B33Y10/00Y02P10/25
Inventor 张敏杜明科张云龙李静董玉凡苟川东王博玉
Owner XIAN UNIV OF TECH
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