Principle of welding

The principle of welding is the process of binding two or more metal workpieces together by heating them to a molten state and then allowing them to cool and solidify. Depending on the welding method, this process may involve generating enough heat to melt the metal through an electric arc, gas flame, laser, or other heat source.

The principle of welding, how to form the solder joint

The principle of welding is based on solid bonding between metals, and the specific formation process involves several key aspects. First, the metal at the connection site is heated to a molten state, which is called melting core. When the temperature is high enough, the surface tension of the material being welded is reduced, allowing the molten metal (solder) to wet the substrate and solidify to form a strong contact as the temperature decreases.