Alloy powder for improving the toughness of dual-phase steel laser welding seam and its application method

An alloy powder, dual-phase steel technology, applied in laser welding equipment, welding equipment, metal processing equipment and other directions, can solve the problem of excessive decrease in weld toughness, and achieve the effects of easy promotion, improved weld toughness, and simple preparation.

Inactive Publication Date: 2015-10-28
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defect that the weld seam toughness drops too much after laser welding of high-strength dual-phase steel in the prior art, and to provide an alloy powder that can improve the weld performance of dual-phase steel after laser welding

Method used

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Examples

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Embodiment Construction

[0018] The present invention and its applications will be further described below in conjunction with the examples.

[0019] 1. Pour an appropriate amount of absolute ethanol into the evaporating dish, and use an electronic balance to weigh 13.8% iron-based alloy powder, 82.8% iron powder, 1.4% aluminum powder, 1% vanadium powder and 1 % cerium oxide powder was added to absolute ethanol, and the mixture was stirred with a glass rod to make it evenly mixed.

[0020] The iron-based alloy powder is a commercially available Fe33-37 iron-based alloy powder, and its components and mass percent content are Cr21%, B1.5%, Si3.5%, Ni10%, Mo2%, Mn0.8 %, V0.5%, the rest is Fe.

[0021] 2. Grind the butt surface of the workpiece to be welded with sandpaper to make the welding butt surface as smooth as possible. Use cotton dipped in alcohol to wipe the butt surface and surrounding area of ​​the workpiece to be welded, and apply the alloy powder mixture after the alcohol on the workpiece h...

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Abstract

The invention discloses alloy powder used for improving flexibility of dual-phase steel laser welding joints and an application method of the alloy powder. The application method includes pouring absolute ethyl alcohol into an evaporating dish, weighing 13.5-14.5% of ferrous alloy powder, 82.5-83.5% of ferrous powder, 1-1.5% of aluminum powder, 0.8-1.2% of vanadium powder and 0.8-1.2% of cerium oxide into the evaporating dish, and stirring uniformly to prepare sticky alloy powder liquid; cleaning abutted surfaces of a workpiece to be welded, uniformly coating the sticky alloy powder liquid on the abutted surfaces and the peripheral area, and then performing laser welding. The alloy powder is simple to prepare, low in energy consumption and easy to popularize, and elongation rate of welding joint breakage is increased to 4.28% from 2.40%.

Description

technical field [0001] The invention relates to laser welding of dual-phase steels, in particular to an alloy powder for improving the toughness of laser welding seams of dual-phase steels. Background technique [0002] The development of any new technology and the emergence of new materials are often closely related to the needs of production. The emergence and development of dual-phase steel is the direct result of the development and needs of the automotive industry and the use of high-strength and high-formability plates. Therefore, dual-phase Since steel appeared in 1968, it has developed rapidly and been applied in the automobile industry. Dual-phase steel is obtained from low-carbon steel or low-alloy high-strength steel through critical zone treatment or controlled rolling, and is mainly composed of ferrite and martensite. [0003] Laser welding has high efficiency and good precision, so laser welding has great potential in dual-phase steel for automotive applicatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00C22C38/54B23K26/24
Inventor 李笑雨王立君杨立军
Owner TIANJIN UNIV
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