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A kind of brazing powder and brazing method for ultrasonic assisted brazing

An ultrasonic-assisted, brazing method technology, applied in the direction of welding equipment, welding media, welding/cutting media/materials, etc., can solve the problems of high operation requirements, high welding temperature, low welding efficiency, etc., to reduce gas pollution, joints The effect of high quality and short welding times

Active Publication Date: 2022-03-25
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The common characteristics of the above examples include high welding temperature, low welding efficiency and high operation requirements.

Method used

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  • A kind of brazing powder and brazing method for ultrasonic assisted brazing
  • A kind of brazing powder and brazing method for ultrasonic assisted brazing
  • A kind of brazing powder and brazing method for ultrasonic assisted brazing

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0047] (1) The base materials to be brazed are shaped red copper plate 2 and square red copper plate 4, the surface area to be welded of square red copper plate 2 and square red copper plate 4 is smoothed with sandpaper, and then sprayed with alcohol to wash the surface of the area to be welded, and then drying treatment;

[0048] (2) First put the red copper plate 2 and the red copper plate 4 in the groove of the mold, and then place the alloy brazing powder completely wetted with alcohol between the red copper plate 2 and the red copper plate 4.

[0049] (3) Use large tweezers to place the specimen placed on the platform 7 with stoppers 5 and 6, and press the longitudinal ultrasonic vibrator 1 of the longitudinal ultrasonic generator on the copper plate 2. The frequency is 50KHz, the power is 2000w, the brazing temperature is room temperature, and the test piece to be welded is ultrasonic-assisted welding, the ultrasonic-assisted welding time is 30s, and the welding time is ...

specific Embodiment 2

[0054] (1) Smooth the surfaces of the square copper plate 2 and the square aluminum alloy plate 4 to be welded with sandpaper, then spray the surfaces of the to-be-welded areas with alcohol, and then dry them;

[0055] (2) as figure 2 As shown, the test pieces to be welded are placed in the order of the red copper plate 2 , the intermediate welded body 3 with active nanoparticles, and the aluminum alloy plate 4 .

[0056] (3) Use large tweezers to place the specimen placed on the heating platform 6 with the stopper 5, press the ultrasonic vibrator 1 of the longitudinal ultrasonic generator on the specimen to be welded, and the frequency of the ultrasonic wave of the transverse ultrasonic generator At 20KHz, the power is 100w, the brazing temperature is 230℃, and the test piece to be welded is ultrasonic-assisted welding, the ultrasonic-assisted welding time is 20s, and the welding time is 50s.

[0057] The intermediate welding body with active nanoparticles is preferably Sn0...

specific Embodiment 3

[0061] (1) Polish the surface areas of the square aluminum alloy plate 2 and the square aluminum alloy plate 4 to be welded smooth with sandpaper, then spray the surface of the area to be welded with alcohol, and then dry them;

[0062] (2) as image 3 As shown, the test pieces to be welded are placed in the groove of the mold according to the order of the aluminum alloy plate 2, the intermediate welded body 3 with active nanoparticles, and the aluminum alloy plate 4;

[0063] (3) Put the mold with the test piece on the heating platform 6 with large tweezers, and press the ultrasonic vibrator 1 of the longitudinal ultrasonic generator on the test piece to be welded. The ultrasonic frequency of the longitudinal ultrasonic generator is 30KHz and the power is 1500w. , the brazing temperature is 150 ℃, and the specimen to be welded is ultrasonic-assisted welding, the ultrasonic-assisted welding time is 40 s, and the welding time is 100 s.

[0064] The intermediate welding body wi...

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Abstract

The invention provides brazing powder for ultrasonic-assisted brazing and a brazing method. The brazing powder is made of tin-copper powder or tin-silver-copper powder, or powder mixed with tin-copper powder and tin-silver-copper powder, and the diameter is in the range of 1-1000nm. Any one of nickel powder, cobalt powder, copper powder, tin powder, titanium powder in the active nanoparticles, or any two, or any three, or any four, or five, according to not more than 20% The mass ratio is evenly mixed. In the brazing powder and brazing method for ultrasonic-assisted brazing of the present invention, the temperature is low during welding, and active nanoparticles are used to generate heat through the oscillation of the ultrasonic generating device to promote metallurgical reaction between the solder or the nanoparticles and the base material, thereby realizing lead-free Low-temperature interconnection of all-solid or semi-solid solder, the welding temperature is more than 30°C lower than that of traditional liquid interconnection; the vibration activation and friction generated by the ultrasonic generator promotes the rupture of the oxide film on the surface of the welding base material to achieve the effect of film removal , reducing the gas pollution generated by welding flux, less welding pollution and high joint quality.

Description

technical field [0001] The invention relates to the technical field of brazing, and relates to a brazing powder for ultrasonic-assisted brazing and a brazing method. Background technique [0002] Due to its low melting point, good cost performance and easy availability, lead-tin solder is widely used in various industries, but lead has a great negative impact. With the improvement of people's awareness of environmental protection, countries around the world have issued Regulations Restricting the Use of Lead. Now people want to use tin-based solders such as SAC0307 and SC07 instead of SnPb37, but the melting point of tin-based solders such as SAC0307 and SC07 is about 40° higher than that of SnPb37, and with the integration, miniaturization and structure of electronic products Complicated, the requirements for the welding technology of products are getting higher and higher. In most electronic products, the reliability of the solder joints, the temperature during the solder...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/26B23K1/06
Inventor 甘贵生蒋刘杰刘歆杨明波杨栋华吴懿平刘世明夏大权田谧哲曹华东
Owner CHONGQING UNIV OF TECH
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