Ultrasonic impact surface modification auxiliary titanium alloy diffusion connection method

A technology of ultrasonic impact and diffusion connection, applied in the field of diffusion connection, can solve the problems of complex process, poor applicability, complicated operation, etc., and achieve the effect of simple structure, convenient operation, and accelerated diffusion efficiency.

Active Publication Date: 2019-03-05
TIANJIN UNIV
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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 cu

Method used

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  • Ultrasonic impact surface modification auxiliary titanium alloy diffusion connection method
  • Ultrasonic impact surface modification auxiliary titanium alloy diffusion connection method
  • Ultrasonic impact surface modification auxiliary titanium alloy diffusion connection method

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

[0026] use the attached figure 1 The ultrasonic impact equipment shown is used to perform ultrasonic impact on titanium alloys. The spherical impact head or needle-shaped impact head with the same material as the titanium alloy is preferred. The ultrasonic impact equipment is selected as a full-wavelength type. Ultrasonic impact is set on the three-dimensional robot arm. equipment to realize the movement and control of the ultrasonic impact head in three dimensions. as attached figure 2 As shown, the ultrasonically impacted titanium alloy surfaces were bonded for diffusion bonding.

[0027] In this example, the ultrasonic impact frequency of TC4 sheet is 17.7kHz, the current is set to 3A, the amplitude is 40μm, the diameter of the ultrasonic impact needle is 4mm, the walking speed is 1mm / s, and the number of impact times is 1. surface modification...

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Abstract

The invention discloses an ultrasonic impact surface modification auxiliary titanium alloy diffusion connection method. According to the method, ultrasonic impact is conducted on the surface of a titanium alloy plate, the titanium alloy plate is heated and diffused, so that joints can be tightly combined, and the high-strength connection of a titanium alloy is realized. According to the method, agrain refinement layer is obtained through ultrasonic impact surface modification, the atomic diffusion rate is increased, diffusion connection parameters of the titanium alloy are reduced, and low-temperature diffusion connection of the titanium alloy is realized; and the method is simple and convenient to operate, good in adaptability, high in repeatability, green and energy-saving, and can greatly improve the 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...

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Application Information

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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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