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High-strength and low-temperature solder containing cadmium and silver

A low-temperature solder, high-strength technology, used in welding/cutting media/materials, welding media, welding equipment, etc., to achieve the effects of good wettability, good silver plating process, and good flowability

Inactive Publication Date: 2011-05-18
ANHUI BOWEI CHANGAN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In order to overcome the defects of the prior art, the object of the present invention is to provide a cadmium-silver high-strength low-temperature solder to solve the problem of high-strength low-temperature soldering of high-frequency devices in electronic equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Example 1: Before smelting, process cadmium and zinc into small pieces, cadmium: 5mm×20mm×20(mm), zinc: 5mm×10mm×10mm, and silver into granules, silver: φ1mm×1mm. Then take 77g of cadmium, 17g of zinc, and 4.5g of silver, weigh them, put them in the corresponding container and mark them, check to ensure that each equipment is in good condition, put the prepared components into the ceramic crucible according to the order of silver, cadmium and zinc, and then put them in the ceramic crucible. Cover the top with a layer of screened clean plant ash, cover the lid, and slowly send the crucible into the melting furnace with crucible tongs. During melting, when the temperature rises to 320°C ± 3°C, the cadmium has begun to melt and continues to rise to 430°C. When ℃±3℃, binary alloys of cadmium and zinc have been formed. Use crucible tongs to slowly take the crucible from the melting furnace to the side of the furnace, open the crucible cover and stir slowly with a graphite rod...

Embodiment 2

[0060] Embodiment 2: get 81g of cadmium, 15g of zinc, 5.5g of silver, and the smelting method is the same as that of embodiment 1.

Embodiment 3

[0061] Embodiment 3: get 78g of cadmium, 16g of zinc, 5g of silver, and the smelting method is the same as embodiment 1.

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PUM

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Abstract

The invention discloses a high-strength and low-temperature solder containing cadmium and silver, which is characterized by comprising the following components according to the parts by weight: 77-81 parts of cadmium, 15-17 parts of zinc and 4.5-5.5 parts of silver, wherein the silver, the cadmium and the zinc are used as the components of the solder of low-temperature welding. The selection of the components and the preparation of the proportion are finally obtained through many times of technological tests by referring to a large amount of data through optimized combination according to theproperties of the required solder. The brazing alloy using cadmium as a basal body has good heat resistance and corrosion resistance, and the cadmium-based brazing alloy containing zinc can form binary alloy easily, thereby improving the strength and the corrosion resistance. The cadmium-based brazing alloy containing silver has higher strength and heat resistance in the low-temperature brazing alloy; although the plasticity of the cadmium-based brazing alloy containing silver is slightly poorer than that of the silver-brazing alloy, the cadmium-based brazing alloy containing silver has good fluidity and brazing manufacturability, has excellent fluidity and gap filling capability on copper and copper alloy, is suitable for brazing high-frequency elements of copper and copper alloy, and has excellent weld silvering performance after brazing.

Description

Technical field: [0001] The invention relates to a solder, in particular to a cadmium-silver high-strength low-temperature solder. Background technique: [0002] High-frequency components generally require high dimensional accuracy, high shape and position tolerances, and high roughness, and such high-precision components are generally finished through multiple processes. Due to welding and other reasons, some parts have some defects when the finishing is about to be completed, and these defects are not allowed to appear, so they can only be scrapped. [0003] The feed horn is the core component of the radar product, and its processing quality and processing accuracy directly affect the various telecommunication indicators of the radar product. According to the needs of radar products, the feed horn is usually divided into two types: aluminum material and copper material. Aluminum material feed horns generally adopt the method of gluing and aluminum brazing, while copper m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/26B23K35/40
Inventor 付建徽过石正
Owner ANHUI BOWEI CHANGAN ELECTRONICS