A method for improving the corrosion resistance of welded joints of aluminum plates and steel plates

A welding joint, corrosion-resistant technology, used in welding equipment, connecting components, cold-pressed connections, etc., can solve problems such as reducing joint performance, galvanic corrosion, affecting the safety and service life of welded components, etc.

Active Publication Date: 2021-09-14
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above research results have a certain guiding effect on obtaining welded joints with good performance. However, the current welding methods are still subject to certain restrictions to varying degrees. Welding joints generate a large number of brittle intermetallic compounds; surface plasma spraying technology is used to improve performance, and the intermetallic compounds of welding joints and weld metal and steel plates produce galvanic corrosion, which reduces joint performance and directly affects the safety and service life of welded components

Method used

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  • A method for improving the corrosion resistance of welded joints of aluminum plates and steel plates
  • A method for improving the corrosion resistance of welded joints of aluminum plates and steel plates
  • A method for improving the corrosion resistance of welded joints of aluminum plates and steel plates

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Experimental program
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Effect test

Embodiment 1

[0038] The dimensions of aluminum plate and stainless steel plate are both 75 mm×20 mm×1.5 mm, and the specific steps of electromagnetic pulse welding are as follows:

[0039](1) Grind the surface of the steel plate to be welded with sandpaper until the surface is bright, and clean it with alcohol, then scrub it with acetone and dry it naturally, so as to remove the oil and impurities on the surface of the welding material to be welded;

[0040] (2) The treated steel plate is plated with a layer of cobalt on the surface to be welded by electroplating, and the cobalt-plated steel plate obtained is ready for use;

[0041] (3) Assemble the prepared aluminum plate and steel plate on the welding fixture, use the aluminum plate as the double plate, and the steel plate as the base plate, adjust the weld gap and lap length through the insulating backing plate, where the lap gap is 2.0 mm, and the lap joint The length is 20 mm, for electromagnetic pulse lap welding of aluminum plate / st...

Embodiment 2

[0047] The dimensions of aluminum plate and stainless steel plate are both 75 mm × 20 mm × 2 mm, and the specific steps of electromagnetic pulse welding are as follows:

[0048] (1) Grind the surface of the steel plate to be welded with sandpaper until the surface is bright, and clean it with alcohol, then scrub it with acetone and dry it naturally, so as to remove the oil and impurities on the surface of the welding material to be welded;

[0049] (2) Apply electroplating to the treated steel plate to coat a layer of cobalt on the surface to be welded, and then perform the following operations on the obtained cobalt-plated steel plate;

[0050] (3) Assemble the prepared aluminum plate and steel plate on the welding fixture. The aluminum plate is used as the double plate and the steel plate is used as the base plate. The weld gap and lap length are adjusted through the insulating backing plate. The lap gap is 1.8 mm, and the lap joint Length 15 mm, for electromagnetic pulse la...

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Abstract

The invention belongs to the field of applied welding technology, and specifically discloses a method for improving the corrosion resistance of welded joints between aluminum plates and steel plates. A layer of cobalt is coated on the surface of the steel plates to be welded for use; Assemble the aluminum plate and steel plate on the fixture tool, and keep a certain lap length and lap gap between the aluminum plate and the steel plate; the plane formed by the lap joint of the aluminum plate and the steel plate is the surface to be welded; there is a coil under the aluminum plate, and a coil above the steel plate. Press plates; finally aluminum and steel plates welded using electromagnetic pulses. The method can not only improve the corrosion resistance, wear resistance and high temperature resistance of the welded joint, but also effectively prevent the generation of aluminum-steel intermetallic compounds and base metal fragments, and improve the performance of the welded joint of the aluminum plate and the steel plate.

Description

technical field [0001] The invention relates to the field of applied welding technology, in particular to a method for improving the corrosion resistance of welded joints of aluminum plates and steel plates. Background technique [0002] At present, with the rapid development of industry, the demand for resources is increasing significantly, which will inevitably lead to the shortage of resources. How to solve this problem has become the subject of current thinking. Therefore, "low energy consumption, green environmental protection, and lightweight" has become an important means of breakthrough. Therefore, the light metal aluminum and its aluminum alloys, which are widely distributed, have large reserves, and are corrosion-resistant, have attracted widespread attention in the manufacturing industry, and have become one of the best substitutes for traditional steel. In recent years, aluminum-steel composite materials have been widely used in industry, especially in the field...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/02B23K20/06B23K20/24F16B11/00
CPCB23K20/02B23K20/06B23K20/24F16B11/004
Inventor 迟露鑫梁仕发夏大权杨栋华
Owner CHONGQING UNIV OF TECH
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