Method for improving corrosion resistance of welding joint between aluminum plate and steel plate

A welded joint and corrosion-resistant technology, which is applied in welding equipment, cold-pressed connections, connected components, etc., can solve problems affecting the safety and service life of welded components, galvanic corrosion, and reduce joint performance, etc., to achieve control of intermetallic compound content , Improve corrosion resistance, improve the effect of joint performance

Active Publication Date: 2020-01-10
CHONGQING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Method for improving corrosion resistance of welding joint between aluminum plate and steel plate
  • Method for improving corrosion resistance of welding joint between aluminum plate and steel plate
  • Method for improving corrosion resistance of welding joint between aluminum plate and steel plate

Examples

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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 technical field of application welding, and particularly discloses a method for improving the corrosion resistance of a welding joint between an aluminum plate and a steelplate. The method comprises the following steps that a layer of cobalt is plated on the to-be-welded surface of the steel plate for standby application; then the steel plate is used as a base plate,the aluminum plate is a compound plate, the aluminum plate and the steel plate are assembled on a welding clamp tool, and a certain lap joint length and a lap joint gap are kept between the aluminum plate and the steel plate; the plane formed through the lap joint between the aluminum plate and the steel plate is a to-be-welded surface; a coil is arranged below the aluminum plate, and a pressing plate is arranged above the steel plate; and finally, the aluminum plate and the steel plate are welded by using the electromagnetic pulse. According to the method, the corrosion resistance, the wear resistance and the high temperature resistance of the welding joint can be improved, the generation of aluminum and steel intermetallic compounds and mother material fragments can be effectively prevented, and the performance of the welding joint between the aluminum plate and the steel plate is improved.

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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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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