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Preparation method of silver solder paste and silver solder paste product

A silver brazing and finished product technology, applied in welding equipment, welding medium, manufacturing tools, etc., can solve problems such as insufficient high temperature life, insufficient wettability of solder, insufficient activity retention time, etc.

Active Publication Date: 2012-08-08
HUIZHOU WUFU IND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the shortcomings of the silver brazing paste in the prior art, such as insufficient high-temperature life, insufficient activity retention time, and insufficient wettability of the brazing material when welding stainless steel and hard alloys, it is necessary to improve the preparation method of the silver brazing paste. to improve, and to improve its products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] (1) Preparation and pretreatment of raw materials

[0084] Take 33 parts of boric acid, 28 parts of potassium fluoroborate, 25 parts of potassium fluoride, and 2.5 parts of monomeric boron. After removing the impurities in each raw material and drying them, they are respectively ground into 80-mesh uniform powder; then weigh 11.5 parts of distilled water set aside;

[0085] (2) stirring

[0086] Put the raw material weighed in the step (1) into the blender except distilled water, stir for 15 minutes, make the raw material mix evenly, the stirring speed of the blender is 85 rev / min;

[0087] (3) Baking

[0088] Spread the evenly stirred mixture on a baking tray with a thickness of 2 cm, put it in the oven, set the baking temperature to 350°C for 3 hours;

[0089] (4) Grinding

[0090] Take out the lumpy mixture after baking, let it stand for 3 hours, let it cool down to room temperature naturally, put the cooled lumpy mixture into a pulverizer and pulverize it; add 1...

Embodiment 2

[0092] (1) Preparation and pretreatment of raw materials

[0093] Take 40 parts of boric acid, 28 parts of potassium fluoroborate, 20 parts of potassium fluoride, and 2 parts of monomeric boron. After removing the impurities in each raw material and drying them, they are respectively ground into 90-mesh uniform powder; then weigh 10 parts of distilled water. set aside;

[0094] (2) stirring

[0095] Put the raw material weighed in the step (1) into the blender except distilled water, stir for 20 minutes, make the raw material mix evenly, the stirring speed of the blender is 100 rev / min;

[0096] (3) Baking

[0097] Spread the evenly stirred mixture on a baking tray with a thickness of 4 cm, put it in the oven, set the baking temperature to 400°C for 3.5 hours;

[0098] (4) Grinding

[0099] Take out the lumpy mixture after baking, let it stand for 3.5 hours, let it cool down to room temperature naturally, put the cooled lumpy mixture into a pulverizer and pulverize it; add...

Embodiment 3

[0103] (1) Preparation and pretreatment of raw materials

[0104] Take 33 parts of boric acid, 28 parts of potassium fluoroborate, 20 parts of potassium fluoride, and 2 parts of monomeric boron. After removing the impurities in each raw material and drying them, they are respectively ground into 100-mesh uniform powder; then weigh 17 parts of distilled water. set aside;

[0105] (2) stirring

[0106] Put the raw material weighed in the step (1) into the blender except distilled water, stir for 25 minutes, make the raw material mix evenly, the stirring speed of the blender is 140 rev / min;

[0107] (3) Baking

[0108] Spread the evenly stirred mixture on a baking tray with a thickness of 6 cm, put it in the oven, set the baking temperature to 450°C for 4 hours;

[0109] (4) Grinding

[0110] Take out the lumpy mixture after baking, let it stand for 4 hours, let it cool down to room temperature naturally, put the cooled lumpy mixture into a pulverizer and pulverize it; add 17...

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PUM

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Abstract

The invention provides a preparation method of silver solder paste, which comprises the following steps: 1, preparing raw materials and pretreating the raw material; 2, stirring the raw materials; 3, roasting the raw materials; and 4 grinding the raw materials. The invention also provides silver solder paste prepared by the method. The silver solder paste is prepared from the following raw materials in percentage by weight: boric acid 33-38, potassium fluoborate 28-32, potassium fluoride 20-25, monomer boron 2.0-2.5 and distilled water 10-20. Compared with the prior art, the method has the advantages of stable product quality and high material utilization rate. The product has the characteristics of long soldering high-temperature life, long activity retention time, high solder wettability and high soldered joint quality.

Description

technical field [0001] The invention relates to solder paste, in particular to a preparation method and product of silver solder paste. Background technique [0002] Brazing is a welding method in which a metal material with a lower melting point than the base metal is used as the solder, and the liquid solder is used to wet the base metal and fill the interface gap between the workpiece and make it diffuse with the base metal. The brazing deformation is small, the joint is smooth and beautiful, and it is suitable for welding precision, complex and components composed of different materials. According to the different welding temperature, brazing can be divided into two categories, the welding heating temperature is lower than 450 ℃ is called soft soldering, and higher than 450 ℃ is called hard brazing. [0003] Brazing requires brazing paste, and silver brazing paste is widely used. The existing silver brazing paste is a white paste with an active temperature of 550-850° ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/363
Inventor 易骏
Owner HUIZHOU WUFU IND TECH
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