Welding
From open-encyclopedia.com - the free encyclopedia.
Welding is the joining together of materials (typically metals or thermoplastics), usually by a fusion process.
Most commonly, workpieces are welded by melting both of them and adding more molten metal or plastic to form a pool that cools to form a strong joint. The energy to form the joint between metal workpieces most often comes from a flame (e.g. oxy-acetylene) or an electric arc, but welding by laser beam, electron beam and friction processes is well established. Energy for fusion welding of thermoplastics typically comes from direct contact with a heated tool or a hot gas.
Welding differs from soldering and brazing in that enough heat is applied to melt the materials to be joined. Soldering uses solder, a lower-melting-point material.
Types of welding
- Arc Welding; see Manual metal arc welding
- Cold welding
- Electron beam welding
- Explosive welding
- Forge welding
- Friction welding
- Friction-stir welding (FSW)
- Fusion welding
- Gas welding
- Induction welding
- Laser welding
- Manual metal arc welding, or 'stick' welding
- Metal Inert/Active Gas welding (MIG/MAG)
- Plasma welding
- Plastic welding
- Spot welding
- Stud welding
- Submerged arc welding
- Thermite
- Tungsten inert gas welding (TIG)
- Ultrasonic welding
External link
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