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Soldering is a thermal process used to bring about the fused joining of materials and involves a liquid phase caused by the melting of solder. During the process, a surface alloy is created but the substrate material is not melted (welding = fused joining caused by melting the substrate materials).
Depending on the soldering method used (soft, hard or high-temperature soldering), temperatures in excess of 1,000 °C may be reached.
Handling the workpieces requires materials that have high temperature resistance and will ideally prevent the solders from adhering to them.
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