A soldering iron is a hand tool used in the process of soldering, which joins two or more metal parts together using a low-melting point alloy called solder. The iron provides the necessary heat to melt the solder, allowing it to flow between the metal pieces and create a permanent bond.
The soldering iron heats up a tip (usually made of copper) to a high temperature. This heat is then applied to the solder, causing it to melt. The molten solder is then directed into the joint between the metal pieces, and as it cools and solidifies, it creates a strong connection.
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