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Ultrasonic vibration assisted laser welding method for heterogeneous material

A laser welding and ultrasonic vibration technology, used in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problem of uneven elements, and achieve the effect of eliminating brittle phase, increasing absolute temperature, and inhibiting segregation.

Active Publication Date: 2018-01-12
DALIAN UNIV OF TECH
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Problems solved by technology

[0007] The technical solution of the present invention: to overcome the deficiencies of the prior art, the present invention proposes a method for ultrasonic vibration-assisted laser welding of heterogeneous materials, which eliminates unfused regions, secondary phase precipitation, and Uneven distribution of elements and other defects can improve the performance of welded joints, and this method is applied in a follow-up manner, and its application is not limited by the size of the weld

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  • Ultrasonic vibration assisted laser welding method for heterogeneous material

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Embodiment Construction

[0024] The specific implementation manners of the present invention will be further described below in conjunction with the drawings and technical solutions.

[0025] A. Place the Hastelloy C-276 plate with a thickness of 0.5mm on top of the austenitic stainless steel 304 plate with a thickness of 2.0mm, use copper clamps to clamp and fix the heterogeneous materials, and fix the fixture to the machine tool On the stage, the welding form is lap welding, and the distance between the welding clamps is selected as 10mm.

[0026] B. The ultrasonic generator generates ultrasonic high-frequency alternating current, which is converted into ultrasonic mechanical vibration through the transducer. After multi-stage horn amplification, the ultrasonic wave is guided into the welding pool by the tip of the ultrasonic tool head. The ultrasonic vibration frequency is selected as 20 kHz, the power of the ultrasonic generator is 1.4 kW, and the corresponding amplitude of the tip of the tool hea...

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Abstract

The invention belongs to the technical field of laser welding and relates to an ultrasonic vibration assisted laser welding method for a heterogeneous material. Ultrasonic vibration is introduced intolaser welding of the heterogeneous material, specially, ultrasonic-frequency alternating current is produced by an ultrasonic generator, vibration production and amplitude magnification are implemented by an ultrasonic vibrator, and finally, the ultrasonic vibration is guided into a welding pool by the welding material. Follow-up regulation is performed on the laser welding process of the heterogeneous material by means of special effect produced through ultrasonic vibration in the welding pool. Compared with a traditional laser welding method for the heterogeneous material, designed ultrasonic vibration assisted laser welding equipment for the heterogeneous material can effectively inhibit formation of an incomplete fusion area and a brittle phase in a welding seam and homogenizes element distribution in the welding seam, so that mechanical performance and corrosion resistance of a welding joint are improved, meanwhile, a laser machining system is not required to be changed, and theapplication of the method is not limited by size of the welding material.

Description

technical field [0001] The invention belongs to the technical field of laser welding, and relates to a method for ultrasonic vibration-assisted laser welding of heterogeneous materials. Background technique [0002] Compared with traditional welding methods, laser welding has the advantages of refining weld grains and reducing welding residual stress, which is conducive to improving the structure and performance of welds and ensuring welding quality. It has been widely used in the field of alloy welding in recent years. However, in the laser welding of heterogeneous materials, there are still some problems, such as the occurrence of unfused areas, secondary phases, and uneven distribution of elements. Among them, the unfused zone is the weakest position of the corrosion resistance of the welded joint. The formation of the secondary phase will lead to the decline of the mechanical properties of the welded joint, and the uneven distribution of elements will reduce the consiste...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/323B23K26/346
Inventor 吴东江周思雨柴东升程波于京令牛方勇马广义
Owner DALIAN UNIV OF TECH
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