Ultrasonic Impact Surface Modification Assisted Diffusion Bonding Method of Titanium Alloy

A technology of ultrasonic shock and diffusion connection, applied in the field of diffusion connection, can solve the problems of complicated operation, high cost, poor applicability, etc., and achieve the effect of simple operation and low equipment cost

Active Publication Date: 2021-05-04
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The commonly used surface modification methods include high-energy shot peening, mechanical grinding, laser cladding, etc., but the operation is cumbersome, the process is complicated, the applicability is poor, and the cost is high, and the practical application is limited to a certain extent.

Method used

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  • Ultrasonic Impact Surface Modification Assisted Diffusion Bonding Method of Titanium Alloy
  • Ultrasonic Impact Surface Modification Assisted Diffusion Bonding Method of Titanium Alloy
  • Ultrasonic Impact Surface Modification Assisted Diffusion Bonding Method of Titanium Alloy

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Embodiment Construction

[0025] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0026] use attached figure 1 The ultrasonic impact equipment shown is for ultrasonic impact of titanium alloy. It is preferable to use a spherical impact head or a needle-shaped impact head with the same material as the titanium alloy. The ultrasonic impact equipment is selected as the full-wavelength type. Equipment to realize the movement and control of the ultrasonic impact head in three dimensions. as attached figure 2 As shown in Fig. 1, the titanium alloy surface after ultrasonic shock was bonded for diffusion bonding.

[0027] In this example, the ultrasonic shock frequency of TC4 plate is 17.7kHz, the current is set to 3A, the amplitude is 40μm, the diameter of the ultrasonic shock needle is 4mm, the walking speed is 1mm / s, and the number of shocks is 1 pass. for surface modification. Then process the plate into small pieces of 5mm×5m...

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Abstract

The invention discloses a titanium alloy diffusion bonding method assisted by ultrasonic impact surface modification, which involves ultrasonic impacting the surface of a titanium alloy plate, and then heating and diffusing the titanium alloy plate, so that the joints can be tightly bonded and the high-strength connection of the titanium alloy itself is realized. The invention adopts the method for obtaining the crystal grain refinement layer through ultrasonic shock surface modification, increases the atomic diffusion rate and reduces the titanium alloy diffusion connection parameters, and realizes the low temperature diffusion connection of the titanium alloy. The method is easy to operate, has good adaptability, high repeatability, is green and energy-saving, and can greatly improve industrial production efficiency.

Description

technical field [0001] The invention relates to a diffusion bonding technology, more specifically, by ultrasonically impacting the diffusion bonding surface of a metal substrate, a grain refinement layer is formed in a certain depth region of the metal surface, so as to reduce the diffusion bonding temperature and improve the diffusion bonding performance Methods. Background technique [0002] Titanium alloy is a metal structural material with high strength, low elastic modulus, high specific strength and good wear resistance, which is widely used in aerospace, automobile manufacturing, biomedicine and other advanced fields. However, the preparation of some complex and large titanium alloy components involves joining technology, and complex, precise, and strong welded joints with the base metal can be obtained through diffusion joining, which is suitable for various applications. [0003] The microstructure and properties of titanium alloy joints are highly sensitive to dif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F3/02
CPCC22F3/02
Inventor 杨振文金靖又刘齐王春雷王颖王东坡
Owner TIANJIN UNIV
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