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| Trade Articles :: Welding |
Welding |
Welding is the joining of two or more materials through heat, pressure, or both, forming a bond between them. The most common industrial welding methods are fusion processes in which workpieces are melted at their common surfaces. Fusion welding methods, mainly arc, gas, and resistance, are the most widely used and are less restrictive in terms of the materials that can be joined
Some of the most common methods of fusion welding include:
Gas-metal arc welding, also referred to as MIG welding, uses a consumable wire electrode. This is common in high-production manufacturing and construction.
Gas-tungsten arc welding uses a nonconsumable tungsten electrode to make high-precision welds. This is common in the aerospace, food, and nuclear industries.
Shielded-metal arc welding, also called stick welding, uses flux-covered electrodes. This is a frequent choice for repair and occasional welding.
Submerged arc welding is a process by which heat is produced from an arc between the work and a continuously fed filler-metal electrode. This process is most commonly used in mechanized operations.
Oxyfuel gas welding processes use the heat produced by a gas flame to melt the base metal and the filler metal, when used. These processes require minimal equipment, and are therefore inexpensive and suitable for slow, manual methods.
Resistance welding uses electrical resistance and pressure--instead of an arc--to fuse metals. It is commonly used as a mass-production technique requiring special fixtures and automatic handling equipment.
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