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Titanium alloy welding method based on arc ultrasonic process

A welding method, titanium alloy technology, applied in arc welding equipment, welding equipment, non-electric welding equipment and other directions, can solve the problems that have not been discussed in depth

Inactive Publication Date: 2005-02-23
TSINGHUA UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The proposal of this method provides a new idea for using power ultrasonic technology to improve the microstructure and properties of welded joints. However, for different welding materials, how to select the excitation parameters of arc ultrasonic to refine the microstructure of welded joints and improve its comprehensive performance has not been studied. in-depth discussion

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  • Titanium alloy welding method based on arc ultrasonic process
  • Titanium alloy welding method based on arc ultrasonic process
  • Titanium alloy welding method based on arc ultrasonic process

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Embodiment Construction

[0017] figure 1 It is a schematic diagram of the test device of the method of the present invention. Arc ultrasonic titanium alloy welding uses the welding arc not only as a heat generating mechanism, but also as an ultrasonic emission mechanism, which in turn affects the welding metallurgical process of titanium alloys. The arc ultrasonic excitation source 1 can generate an ultrasonic frequency alternating electric signal whose frequency is continuously adjustable from 20 kHz to 500 kHz, and the waveform and power of the signal are both adjustable. After coupling with the welding power source, the welding is carried out according to the conventional titanium alloy arc welding method. The arc plasma is excited by the ultrasonic frequency electric signal to emit ultrasonic waves, which act on the molten pool of the titanium alloy weld to improve the structure and properties of the weld.

[0018] The specific steps of the arc ultrasonic welding method provided by the invention ...

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Abstract

An arc-ultrasonic welding method for Ti alloy features that an arc-ultrasonic exciting source using electric arc as heat generater and ultrasonic emitter is parallelly connected with the conventional power supply used for arc welding. The ultrasonic waves can act on the molten bath on the workpiece to be welded to improve the smelting and crystallizing procedure of Ti alloy for finer crystal grains and higher welding strength and fatigue resistance.

Description

technical field [0001] The invention relates to a titanium alloy welding method based on arc ultrasonic, and belongs to the technical field of arc welding of titanium alloys. Background technique [0002] In the existing technology, the patent No. 96203939.X "an ultrasonic welding machine" uses an ultrasonic focusing probe to realize non-coupling welding of plastics, and can only weld plastic materials with large acoustic impedance and low melting point, while Metal materials such as titanium alloys are powerless. Patent No. 02270273.3 "An Ultrasonic Impact Gun for Improving the Fatigue Strength of Welds" uses piezoelectric ceramic transducers to treat the welds with impact. This technology partially eliminates the residual stress in the weld area, but does not Crystallization processes and metallurgical defects affecting welds and heat-affected zones. [0003] In the traditional titanium alloy arc welding process, due to the rapid growth of the titanium alloy β phase duri...

Claims

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Application Information

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IPC IPC(8): B23K9/06B23K9/067B23K20/10
Inventor 吴敏生李路明郝红伟张雁军何龙标陆志庆
Owner TSINGHUA UNIV
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