Welding

Welding is a fabrication process that joins materials, usually metal. This is usually done by melting the materials and adding a filler piece producing a molten poll to join the substances. Soldering is different, because it involves melting a lower-melting-point material between the work pieces to form a bond between them. The original materials are not melted. Different energy sources can be used for welding. These sources include gas flames, electric arcs, lasers, friction, etc. Welding can be done in many different environments: open air, underwater and in space. Welding is, however, dangerous. To prevent burns, scars, shock, and poisonous fumes from your body precautions must be taken.

Arc welding and oxyfuel welding were among the first processes to develop late in the 19th century. Welding technology advanced quickly during the early 20th century due to World War I and World War II demands of inexpensive, but effective joining methods. After the wars, shielded metal arc welding, gas metal arc welding, and flux-cored arc welding were developed. Welding continues to be an advancing field. Robot welding is becoming more commonplace in industrial settings.