Tin-lead solder for brazing copper radiator

A radiator, copper brazing technology, applied in welding/cutting medium/material, welding medium, welding equipment, etc., can solve the problems of high brazing temperature and equipment requirements, high cost, etc., to achieve easy cleaning and removal , good wetting and spreading properties, good performance results

Inactive Publication Date: 2014-04-16
QINGDAO SHENGJIA INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, copper-based brazing requires high brazing material, brazing temperature and equipment, resulting in high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0006] Below in conjunction with example, the present invention is further described:

[0007] A tin-lead solder for copper radiator brazing, characterized in that the composition of the tin-lead solder for copper radiator brazing comprises: Sn, Pb and trace elements, and each of the components is by weight percentage (unit : wt%) in the following order: Sn 30-35, Pb 65-70, trace elements 0.02-0.05; the melting temperature of the solder is 295-325°C, which is a low-temperature solder for copper brazing; in the solder The trace elements are Cu and Zn; the Cu can reduce the melting point of Sn and improve the fluidity of the solder; the Zn will form a solid solution at the edge of the grain to form a solid solution bond between the solder and the base metal, thereby Improve the ability of the solder to interact with copper, and reduce the melting point of the solder.

[0008] The present invention is described above by way of example, but the present invention is not limited to...

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PUM

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Abstract

The invention relates to a brazing solder, in particular to a tin-lead solder for brazing a copper radiator. The tin-lead solder comprises Sn, Pb and microelements. The tin-lead solder is low in melting temperature, good in mechanical property and not high in price, and has good wettability and spreading performance; the brazed copper radiator is good in stability, high in welding efficiency, reliable in quality, thin and firm in weld seam, free of pseudo soldering and solder accumulation, good in performance and good in cost performance, and residues produced after welding can be easily cleaned away.

Description

technical field [0001] The invention relates to a brazing filler metal, in particular to a tin-lead filler metal for copper radiator brazing. Background technique [0002] Copper and copper alloys have been widely used for their excellent electrical conductivity and thermal conductivity, and copper radiators take advantage of the good thermal conductivity of copper, and are widely used in passenger cars, construction machinery and generator sets. However, copper-based brazing has high requirements for solder, brazing temperature and equipment, resulting in high cost of copper-based brazing, so material workers began to study copper-based brazing. SUMMARY OF THE INVENTION [0003] The present invention aims to solve the above problems, and provides a tin-lead solder for copper radiator brazing, which has lower melting temperature and better wetting performance, and is an ideal tin-lead solder for copper radiator brazing , the technical solutions adopted are as follows: ...

Claims

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Application Information

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IPC IPC(8): B23K35/26
CPCB23K35/268
Inventor 苟雅慧
Owner QINGDAO SHENGJIA INFORMATION TECH
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