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Laser-ultrasonic hybrid welding method and device for heterogeneous metals

A heterogeneous metal, composite welding technology, applied in laser welding equipment, welding equipment, metal processing equipment and other directions, can solve the problems of increasing the cross-sectional area of ​​effective connection and reducing the energy consumption of consolidation, and achieves obvious effect of reducing brittleness and joints. The effect of improved performance and narrow phase transition range

Active Publication Date: 2020-08-11
NANCHANG UNIV
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Problems solved by technology

Therefore, how to soften the workpiece has become a key issue. Therefore, in the process of laser welding, it is consolidated with ultrasonic welding, which will reduce the energy consumption of consolidation and increase the effective connection cross-sectional area.

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  • Laser-ultrasonic hybrid welding method and device for heterogeneous metals

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing, take TC4 titanium alloy / 304 stainless steel welding as embodiment, the embodiment is described in detail.

[0023] A laser-ultrasonic composite welding method for heterogeneous metals, comprising the following steps:

[0024] Step 1: Preprocessing

[0025] According to the NB / T47014-2011 industry standard, 304 stainless steel and Ti6Al4V titanium alloy sheet materials with a size of 100mm×50mm×0.5mm were selected as the test materials. Before welding, 320# sandpaper was used to polish the oxide layer on the surface of the workpiece, and acetone was used to remove the 15mm near the lap joint. Grease.

[0026] Step 2: Riveting

[0027] The melting point of Ti6Al4V titanium alloy is 1540-1650°C, and the melting point of 304 stainless steel is about 1400°C. In view of the difference in melting point of the two materials and the low density of Ti6Al4V titanium alloy, and the high absorption rate of the two materials for laser...

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Abstract

The invention provides a heterogeneous metal laser-ultrasonic compound welding method and device. The two advanced technologies of laser welding and ultrasonic consolidation are combined, that is, heterogeneous materials to be welded are connected in an overlap mode to form a lap joint, the position to be welded is welded in a laser welding mode, and the connecting purpose is realized. Under the condition that the temperature of the joint to be welded is below 10-30% of the melting point of an upper layer base material, ultrasonic welding is conducted, and efficient connection of the joint isrealized. According to the heterogeneous metal laser-ultrasonic compound welding method and device, the problem that a brittle joint is formed during welding of heterogeneous materials through a traditional welding method is solved, the problem that only a high energy beam welding method is adopted, though massive formation of intermetallic compound can be partially restrained, the strength of thejoint is still not high is also solved, and the problem difficult to solve that ultrasonic consolidation is only adaptive to low-melting-point thin plate welding is solved.

Description

technical field [0001] The invention belongs to the technical field of heterogeneous material welding, and in particular relates to a laser-ultrasonic composite welding method and device for heterogeneous metals. Background technique [0002] Titanium alloy has the characteristics of high specific strength, high temperature resistance and corrosion resistance, but the relatively high price of titanium alloy restricts its promotion and application; steel has the characteristics of good weldability, mechanical properties and low cost, and is the most widely used For metal materials, substituting part of steel for titanium alloy can effectively take into account the advantages of both materials. Therefore, titanium alloy / steel dissimilar metal welded structures are favored and widely used in aerospace, marine engineering, biomedicine and other fields. With the needs of industrial development, the requirements for joint strength are getting higher and higher. This kind of high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/346B23K26/60B23K26/70
CPCB23K26/346B23K26/60B23K26/70
Inventor 张义福张华张海涛朱政强
Owner NANCHANG UNIV
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