Lead-free alloy for low-temperature welding welder

Abstract

The invention relates to lead-free alloy, which is suitable for use in welding for fixing parts on a substrate and for use on an external electrode for EEFL during the production of electric appliance and electronic products, so that a melting point and welding strength which are better than the prior welding can be obtained without lead. In addition, the alloy is free from lead and can reduce the influences of coal gas and the like generated during welding on human bodies to the maximum degree. Meanwhile, the lead-free alloy has the characteristic that: tin (Sn) is added with 10 to 30 weight percent of bismuthism (Bi), 0.001 to 2.0 weight percent of indium (In), and 0.001 to 0.5 weight percent of phosphor (P), as well as one or more of stibium (Sb), silver (Ag), copper (Cu), germanium (Ge) and gallium (Ga) as additives.

Description

[0001] [Detailed description of the invention] 【Technical field】 [0002] The invention relates to a lead-free alloy for welding, and the welding is completed in the lead-free alloy, thereby reducing disadvantages such as lead poisoning. [0003] Generally, soldering is to join metals by melting solder, so metals with a melting temperature lower than that of the metals to be joined can be roughly divided into leaded solders whose melting temperature is lower than tin (327°C) and leaded solders whose melting temperature generally exceeds 450°C. ℃ hard solder. The components of leaded solder are lead and tin, which have different tensile strength and shear strength according to their content. On the other hand, brazing material is composed of powder, strip, wire, etc., and brass, lead, and silver (Ag) whose main components are copper (Cu), zinc (Zn), and lead (Pb) are added. Silver solder to improve fluidity, etc. [0004] Generally, when electronic equipment is discarded due...

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