Welding is the process by which two metal pieces are joined together, usually with the help of heat. The welding process is typically used to join pieces of metal that are too large or heavy to be riveted. Welding can also be used to repair damaged metal structures, such as bridges and ships.
The first step in welding is to create an area on the surface of one piece of metal that will act as the weld-point. This is done by cutting a groove into the surface with a chisel or grinder, then filing it down until it’s flat. The second step is to clean off any dirt or grease from both surfaces, then apply flux at these points. Flux protects the metals from oxidation during welding and helps them stick together better when they’re heated up.