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Brazing powder for ultrasonic assisted brazing and brazing method

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

Active Publication Date: 2019-05-17
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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  • Brazing powder for ultrasonic assisted brazing and brazing method
  • Brazing powder for ultrasonic assisted brazing and brazing method
  • Brazing powder for ultrasonic assisted brazing and brazing method

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, and the surface areas to be welded of square red copper plate 2 and square red copper plate 4 are smoothed with sandpaper, and then the surface of the area to be welded is sprayed with alcohol, and then carry out drying treatment;

[0048] (2) Put the red copper plate 2 and the red copper plate 4 in the groove of the mold first, 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) Put the test piece placed according to the position on the platform 7 with stoppers 5 and 6 with large tweezers, press the longitudinal ultrasonic vibrator 1 of the longitudinal ultrasonic generator on the copper plate 2, and the longitudinal ultrasonic generator ultrasonically The frequency is 50KHz, the power is 2000w, and the brazing temperature is room temperature. Ultrasonic-assisted welding is performed...

specific Embodiment 2

[0054] (1) Polish the surface areas of the square red copper 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 perform drying treatment;

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

[0056] (3) Put the test piece placed according to the position on the heating platform 6 with the stopper 5 with large tweezers, press the ultrasonic vibrator 1 of the longitudinal ultrasonic generator on the test piece to be welded, and the ultrasonic frequency of the transverse ultrasonic generator The power is 20KHz, the power is 100w, and the brazing temperature is 230°C. Ultrasonic-assisted welding is performed on the specimen to be welded. The ultrasonic-assisted welding time is 20s, and the welding time is 50s.

[0057] The intermediate solder b...

specific Embodiment 3

[0061] (1) Polish the surface area 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 perform drying treatment;

[0062] (2) if image 3 As shown, the test piece to be welded is 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, 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°C, and ultrasonic-assisted welding is performed on the specimen to be welded. The ultrasonic-assisted welding time is 40 s, and the welding time is 100 s.

[0064] The inte...

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Abstract

The invention provides brazing powder for ultrasonic assisted brazing and a brazing method. The brazing powder is prepared by uniformly mixing tin copper powder or tin silver copper powder, or powderof the tin copper powder mixed with the tin silver copper powder with any one kind, or any two kinds, or any three kinds, or any four kinds, or any five kinds of nickel powder, cobalt powder, copper powder, tin powder and titanium powder of active nanoparticles with the diameters being 1-1000nm according to the mass ratio being at most 20%. According to the brazing powder for ultrasonic assisted brazing and the brazing method, the temperature is low during welding, and the active nanoparticles are adopted; by oscillation heating of an ultrasonic generator, the metallurgical reaction between solder or the nanoparticles and a base material is promoted, the full-solid phase or semisolid state low-temperature interconnection of lead-free solder is realized, and the welding temperature is morethan 30% lower than conventional liquid phase interconnection; oscillating activation and friction generated by the ultrasonic generator can cause an oxidation film on the surface of the welding basematerial to be broken to achieve the effect of film removal, thus gas pollution from a welding flux is reduced, the welding pollution is less, and the joint quality is high.

Description

technical field [0001] The invention relates to the technical field of brazing, in particular to a brazing powder for ultrasonic-assisted brazing and a brazing method. Background technique [0002] Due to the low melting point, good cost performance and easy access to lead-tin solder, it is widely used in various industries, but lead has a great negative impact. With the improvement of people's awareness of environmental protection, various countries around the world have released 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 solder joints, the temperature during th...

Claims

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Application Information

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Patent Type & Authority Applications(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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