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Corrosion-resistant high-temperature solder with high ductility

A ductile and corrosion-resistant technology, used in welding/cutting media/materials, welding media, manufacturing tools, etc., can solve problems such as solder instability, improve stability, improve corrosion resistance and high temperature resistance, and improve tortoise cracked effect

Active Publication Date: 2015-09-23
YIK SHING TAT INDUSTRIALCO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The invention provides a high-temperature solder with rare earth metal added, which solves the technical problem of solder instability in the high-temperature state in the prior art

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  • Corrosion-resistant high-temperature solder with high ductility

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Embodiment Construction

[0008] Specific embodiments of the present invention are described in detail below.

[0009] This highly ductile, corrosion-resistant, high-temperature solder contains scandium and niobium in addition to tin and antimony. The inventor has been engaged in solder research for many years, and found in many years of production practice that in the process of soldering circuit boards, when one side is soldered with high-temperature solder, when the other side is soldered, the high-temperature solder will crack. The cracks are very small, but they have a great impact on product quality. The inventors have made statistics and found that the quality problems caused by cracks account for about 20% of the welding quality problems. Therefore, improving the ductility of solder has become the key to solving the problem. . The inventor started with the addition of rare earth metals and carried out tests for many years. The following is the statistical table of the cracking situation summar...

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Abstract

The invention discloses a corrosion-resistant high-temperature soldering flux with high ductility, the main ingredients of the soldering flux comprise tin, stibium, scandium and niobium, wherein stibium accounts for 1-20%, scandium accounts for 1-5% and niobium accounts for 2-5%. A rare earth metal adding method is adopted, so the cracking phenomenon is obviously improved, the product stability is increased, and moreover, the corrosion resistance and thermostable performance of the soldering flux are obviously improved.

Description

technical field [0001] The invention relates to welding materials, in particular to high-temperature solder used for double-sided welding of circuit boards. Background technique [0002] When soldering circuit boards, one side is usually soldered first, and then the other side is soldered. Therefore, solder with the same melting point cannot be used on both sides. However, the current high-temperature solder is mainly composed of tin and antimony. In this state, the solder is not very stable and has poor ductility, which can easily cause desoldering and cracking. Contents of the invention [0003] The invention provides a high-temperature solder added with rare earth metals, which solves the technical problem of solder instability in the high-temperature state in the prior art. [0004] The main components of the high-temperature solder provided by the present invention to solve the above technical problems include tin, antimony and scandium. Scandium element has the eff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/26
Inventor 徐金华谢天伦马鑫吴建新王奕务
Owner YIK SHING TAT INDUSTRIALCO LTD
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