




Soldering iron
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A soldering iron is a handheld tool that converts electrical energy into heat energy to melt solder wire and weld electronic components. Essentially, it is a precision welding device that integrates heating, temperature control, and solder delivery functions. Its working principle is based on Joule's law, using a heating element (such as an iron core) to quickly heat up to the solder melting point (183-280℃). Heat is transferred through the soldering iron tip to achieve wetting and bonding of the metal surface. It is widely used in electronic repair, circuit board soldering, and precision component assembly.
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