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A welding material and its application

A welding material and flux technology, applied in welding/cutting medium/material, welding equipment, welding medium, etc., can solve problems such as inability to effectively improve weldability, poor solder joint strength, poor weldability, etc. Industrial application value, effect of reducing process and cost

Active Publication Date: 2021-09-28
CHONGQING JICHENG AUTOMOTIVE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the technological innovation in the electronic field, nickel coating is widely used in the surface treatment of electronic components due to its high hardness, good wear resistance, anti-corrosion and anti-oxidation, etc. Poor point wetting, poor solder joint strength and other defects
At present, the main preventive method is to improve the solderability of the nickel coating by depositing a layer of palladium by soaking the nickel coating in a palladium salt solution pool, but the palladium layer deposited during immersion cannot ensure that it is evenly distributed on the surface of the nickel layer , and there is a problem of inconsistent thickness during welding, which cannot effectively improve its weldability

Method used

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  • A welding material and its application
  • A welding material and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of welding material, comprising the following steps:

[0029] 1) Take 63g of tin powder and 37g of lead powder and mix evenly to form alloy powder;

[0030] 2) Take 200 mg of palladium, 100 mg of concentrated sulfuric acid with a mass percentage of 98% and 1 L of deionized water to make a palladium sulfate solution;

[0031] 3) Take 42g of terpineol, 46g of rosin, 7g of ammonium chloride, 2.5g of ricinoleic acid and 2.5g of palladium sulfate solution, and stir evenly to form flux;

[0032] 4) Take 90g of alloy powder and 10g of soldering flux and mix to obtain the soldering material.

[0033] The welding material prepared in this embodiment was used to weld the nickel-plated negative electrode spring, and the result was that the solder and the nickel coating could be completely fused, which fully proved that the welding material of the present invention can effectively improve the solderability of the nickel coating.

Embodiment 2

[0035] In this embodiment, except that the concentrated sulfuric acid with a mass percentage of 98% is replaced by phosphoric acid, the rest are the same as in embodiment 1.

Embodiment 3

[0037] In this embodiment, except that 90 g of alloy powder and 10 g of flux are replaced by 500 mL of alloy powder and 500 mL of flux, the rest are the same as in embodiment 1.

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PUM

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Abstract

The invention discloses a welding material, which belongs to the technical field of welding materials. Wherein, the welding material is composed of alloy powder mixed with flux; the alloy powder is composed of tin powder and lead powder; the flux is composed of terpineol, rosin, ammonium halide, ricinoleic acid and palladium salt solution. The welding material of the present invention can effectively improve the wettability of the solder joint and the strength of the solder joint when the nickel coating is welded. The palladium layer deposited in the welding material of the present invention can be evenly distributed on the surface of the nickel layer, and the welding thickness distribution Uniformity, while reducing the process and cost of making nickel-plated devices, therefore, in nickel-plated welding, has a wide range of industrial application value.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a welding material and its application. Background technique [0002] The welding method of nickel plating is widely spread in assembly technology, such as electrode arc welding, submerged arc automatic welding, TIG, MIG, resistance spot welding, plasma arc welding, electron beam welding, etc. With the technological innovation in the electronic field, nickel coating is widely used in the surface treatment of electronic components due to its high hardness, good wear resistance, anti-corrosion and anti-oxidation, etc. Poor point wetting, poor solder joint strength and other defects. At present, the main preventive method is to improve the solderability of the nickel coating by depositing a layer of palladium by soaking the nickel coating in a palladium salt solution pool, but the palladium layer deposited during immersion cannot ensure that it is evenly distr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/26B23K35/362B23K1/00
CPCB23K1/0008B23K35/262B23K35/3612B23K35/362
Inventor 陆忠国
Owner CHONGQING JICHENG AUTOMOTIVE ELECTRONICS