Lead-free solder

Abstract

A lead-free solder material for soldering in electronic, instrument, lamp and other fields consists of: In 0.003-5 wt%, Sb 0.2-5 wt%, Cu 0.5-3 wt% Ag 0.2-5 wt% and Sn the rest. Compared with the traditional solder, the present invention has equal or even higher mechanical performance, soldering temperature and electric performance, and may be drawn into 0.5 mm diameter lead-less solder wire, and it is harmless to human body and environment.

Description

Technical field: [0001] The present invention relates to a kind of lead-free solder, more specifically, the present invention relates to a kind of composition that takes tin as the base metal and adds several metals, it can be easily made into lead-free solder, and can be further drawn The finished wire, such as lead-free welding wire, can be widely used in the lighting industry, electronics, instruments, meters and other industries. Background technique: [0002] The welding of lampshades in the lighting industry generally uses high-lead solders, and the welding of the electronics industry also generally uses lead-containing solders; specifically, lead-containing solders have better welding fluidity and better mechanical properties after welding. It is suitable for the lighting industry and the electronics industry. Because the heavy metal lead is harmful to the human body and the pollution to the environment is becoming more and more serious, the use of lead-containing sol...

AI Technical Summary

Problems solved by technology

The second such lead-free solder consists essentially of the following components: 2-10% by weight of Zn, 10-30% by weight of Bi; 0.05-2% by weight of Ag, optionally containing 0.001-1% by weight Bi; the rest is Sn, easy to oxidize, poor machinability

[0011] 4. Ni element has a great influence on the mechanical processing and tensile energy of lead-free solder, which reduces the stretchability of lead-free solder

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