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Copper/ steel composite material connecting method for preset joint

A connection method and composite material technology, applied in the field of copper/steel composite material connection, can solve problems such as failure of welded structures, reduction of joint strength, etc., and achieve the effect of reducing welding difficulty, reducing the difference in thermophysical properties, and improving comprehensive mechanical properties

Active Publication Date: 2020-09-18
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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  • Copper/ steel composite material connecting method for preset joint
  • Copper/ steel composite material connecting method for preset joint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0035] Step 2: Clean the test board before welding, including mechanical pol...

Embodiment 2

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

[0039] Step 2: Clean the test board before welding, including mechanical p...

Embodiment 3

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

[0043] Step 2: Clean the test board before welding, including mechanica...

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Abstract

The invention discloses a copper / steel composite material connecting method for a preset joint. The method comprises the specific operation steps that 1, the copper-steel preset joint is prepared, specifically, a copper-steel composite weld joint with the reasonable specification is prepared through an electric arc additive technology to serve as the preset joint; and 2, according to the components of base metal, solid welding wires with the same components are selected, and welding of a copper test plate, a steel test plate and the copper-steel preset joint is completed through gas metal arcwelding. According to the method, the welding quality and the comprehensive mechanical property of the copper-steel dissimilar metal welding joint can be improved, and a brand-new thought is providedfor connection of copper / steel dissimilar metal.

Description

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

Claims

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Application Information

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Patent Type & Authority Applications(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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