Copper-nickel-silver brazing paste and preparation method thereof

A technology of silver brazing and copper-nickel-silver, which is applied in the field of copper-nickel-silver brazing paste and its preparation, can solve the problems of inconsistent thermal conductivity and expansion coefficient, accelerated creep aging of welded joints, and poor strength of brazed joints, etc. Achieve the effect of high brazing joint strength, solve the problem of brazing strength, and improve service life and reliability

Active Publication Date: 2021-06-22
浙江力强科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to process problems and material selection limitations, when brazing is involved in the assembly of heat dissipation materials, tin-based metal-based soldering materials are mostly used, and the brazing joint strength shown by soldering materials is poor. The thermal conductivity and expansion coefficient are inconsistent with the heat dissipation base material, which accelerates the creep aging of the welding joint during use in the actual heating environment, increases the brittleness of the solder joints, and even cracks the solder joints.

Method used

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  • Copper-nickel-silver brazing paste and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Step 1, the components of the second component brazed solder 1 white ore oil: 45kg, 2 polyethylene glycol: 42.5kg, 3 polyisobutylene: 2.8kg, 4 high-efficiency surfactant: 0.5kg, 5 phenolic Resin: 2.0kg, 6 Tween: 1.5kg After mixing to 90 ° C, after the solid material is all melted, the temperature drops to room temperature, then adding material 7 trimophosphate: 2.0 kg, 8 fluoroborate: 3.7 Kg, opening emulsification for about 30 minutes, making brazing aid cream;

[0056] Step 2, the first component metal alloy powder is mixed with the brazing additive paste obtained by the step 1, wherein the mass percentage of metal alloy powder is 88%, and the mass percentage of the brazing flux paste is 12. %; Then stirred by a star dispersion mixer for about 50 minutes, i.e., the copper nickel silver brazing slurry of the present invention.

Embodiment 2

[0058] Step 1, the components of the second component brake solder 1 white ore oil:

[0059] 42.0kg, 2 polyethylene glycol: 43.0kg, 3 polyisobutylene: 3.0kg, 4 high-efficiency surfactant: 1.0kg, 5 phenolic resin: 3.0kg, 6 Tween: 2.0kg After mixing, heating to 90 ° C, After all solid materials melt, the temperature is reduced to room temperature, then the material 7 tripolyphosphate: 2.5 kg, 8 fluoroborate: 3.5 kg, the emulsion is stirred for about 30 minutes, and the brazing adder paste is produced;

[0060] Step 2, the first component metal alloy powder is mixed with the brazing additive paste obtained by the step 1, wherein the mass percentage of the metal alloy powder is 87%, the mass percentage of the soldering flux paste is 13. %; Then stirred by a star dispersion mixer for about 50 minutes, i.e., the copper nickel silver brazing slurry of the present invention.

Embodiment 3

[0062] Step 1, the components of the second component brake solder 1 white ore oil:

[0063] 48.0kg, 2 polyethylene glycol: 40.5kg, 3 polyisobutylene: 2.5kg, 4 high-efficiency surfactant: 0.5kg, 5 phenolic resin: 2.0kg, 6 Tween: 1.5kg After mixing to 90 ° C, After all solid materials melt, the temperature is reduced to room temperature, then the material 7 tripolyphosphate is added: 2.0 kg, 8. Potassium borate: 3.0kg, the emulsion is stirred for about 30 minutes, and the brazing additive paste is produced;

[0064]Step 2, the first component metal alloy powder is mixed with the brazing additive paste obtained by the step 1, wherein the mass percentage of the metal alloy powder is 87%, the mass percentage of the soldering flux paste is 13. %; Then stirred by a star dispersion mixer for about 50 minutes, i.e., the copper nickel silver brazing slurry of the present invention.

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Abstract

The invention discloses a copper-nickel-silver brazing paste and a preparation method thereof. The invention adopts copper-nickel-silver with more stable alloy properties as the main base material, and prepares a copper-nickel-silver brazing paste through the cooperation of brazing flux. Soldering paste, which can meet the needs of brazing heat dissipation materials and external parts based on copper, silver, nickel and other base materials. The copper-nickel-silver brazing paste obtained in the present invention has high brazing joint strength after welding , The thermal conductivity and expansion coefficient are consistent with the heat dissipation substrate, which can effectively avoid poor product performance caused by differences in expansion coefficient.

Description

Technical field [0001] The present invention relates to a copper nickel silver brazing slurry and a preparation method thereof, mainly used in a plurality of heat dissipation materials such as copper group, silver group, and outer member brazing. Background technique [0002] With the development of electronics industry, microcation, power increase, and integrated levels are getting higher and higher. During actual application, high-power electronic products or components, hot load is getting bigger and larger, and the heat dissipation problem is also highlighted. To meet the heat sink requirements of high-power components, chips or controller parts, often equipped with a certain heat dissipation material during design or assembly, and currently commonly used heat dissipation materials are mainly copper. Because of process problems and material selection, when brazing in assembly of heat dissipation materials, most of them use the tin-based gold-based soldering material, while th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/363B23K35/40
CPCB23K35/302B23K35/362B23K35/40
Inventor 夏杰黄鲁江赵图强郑建江
Owner 浙江力强科技有限公司
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