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Antioxidation tin lead series alloy welding flux

An anti-oxidation and solder technology, which is applied in the direction of welding/cutting medium/material, welding medium, welding equipment, etc., can solve the problems that the interaction cannot be fundamentally improved, the cost of alloy raw materials is high, and it is difficult to be practical, and it is easy to promote Use, simplified alloy composition, and wide application range

Inactive Publication Date: 2005-03-09
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these raw material purification and deoxidation treatment technologies cannot fundamentally improve the interaction between tin in the solder and oxygen in the air, thereby improving the oxidation resistance of the existing tin-lead solder
For this reason, Chinese patent (CN85100578B) once provided a kind of method by adding the alloy of noble metal indium and rare earth element, to improve the oxidation resistance of tin-lead solder, but the price of indium is very expensive, and the raw material cost of alloy is higher, so it is difficult to Practical

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Sn-Pb eutectic alloy with Pb37%, P0.06% and the rest of Sn is selected for alloying by ordinary smelting technology to obtain the master alloy, and then the master alloy is placed in an open crucible and heated and melted under atmospheric pressure until 250 ℃, scrape off the scum on the liquid surface, and keep warm at this temperature for a long time, observe the color change of the liquid surface of the alloy melt, so as to evaluate the effect of the alloy on high temperature oxidation resistance. It was found that the alloy can still keep the liquid surface bright when kept at 250°C for 5 hours. After the alloy is cooled from high temperature to room temperature, the surface is bright and silvery white, indicating that the alloy has good oxidation resistance.

Embodiment 2

[0021] Configure Pb37%, Ge0.01%, the rest is the Sn-Pb eutectic alloy of Sn, test by the method of embodiment 1, it is found that this alloy can still keep the liquid surface bright when kept at 250 DEG C for 5 hours. After the alloy is cooled from high temperature to room temperature, the surface is bright and silvery white, indicating that the alloy has good oxidation resistance.

Embodiment 3

[0023] Configuration Pb36%, Ag2%, Ge0.1, the rest is the Sn-Pb eutectic alloy of Sn, tests by the method for embodiment 1, finds that at 250 ℃ for 5 hours, this alloy can still keep the liquid level bright. After the alloy is cooled from high temperature to room temperature, the surface is bright and silvery white, indicating that the alloy has good oxidation resistance.

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PUM

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Abstract

An antioxidizing SnPb alloy solder features that it contains Ge and / or P (0.001-0.2%) for improving its antioxidizing performance in high-temp liquid state.

Description

Technical field: [0001] The present invention relates to solder alloys in the welding field, and particularly provides a kind of Sn-Pb-X, Sn-Pb-Ag-X and Sn-Pb-Sb-X (wherein X refers to P or Ge) alloy solder. Background technique: [0002] Soldering is a very old and practical technology, mainly using a tin-lead alloy based system. Since tin-lead solder has good flowability on copper, copper alloys and steel, low melting point, good corrosion resistance, certain strength, good electrical conductivity, good mechanical properties and process properties, it is now widely used Used in the electronics industry (over 70% of total solder consumption). In addition, it is also widely used in instrumentation electrical manufacturing, automobile industry, food industry and other machinery manufacturing industries. From the perspective of the composition of the solder, most solder alloys are simple combinations of tin and lead binary alloys, and the tin content varies from 5 to 95%, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/26
Inventor 冼爱平郭建军尚建库
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI