Solder wire name: Solder wire, Solder wire, Tin wire, Tin wire. Solder wire is composed of two parts: tin alloy and additives. The alloy composition is divided into tin lead, and lead-free additives are evenly poured into the middle part of the tin alloy. The type of solder wire varies with different additives. The auxiliary part is to improve the auxiliary heat conduction of the solder wire during the welding process, remove oxidation, reduce the surface tension of the welded material, remove oil stains on the surface of the welded material, and increase the welding area. The characteristic of solder wire is a tin alloy wire with a certain length and diameter, which can be used in conjunction with an electric soldering iron or laser in the welding of electronic components.