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Welding application

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anandengg's version from 2019-10-06 00:15

Section

Arc welding

 

Name Characteristics Applications
Question Answer
Bare Metal Arc Welding Consumable electrode, no flux or shielding gas Historical
Carbon Arc Welding Carbon electrode, historical Copper, repair (limited)
Flux Cored Arc Welding Continuous consumable electrode filled with flux Industry, construction
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Question Answer
Gas Metal Arc Welding [3] Continuous consumable electrode and shielding gas Industry
Gas Tungsten Arc Welding [4] Nonconsumable electrode, slow, high quality welds Aerospace, Construction (piping), Tool and Die
Plasma Arc Welding Nonconsumable electrode, constricted arc Tubing, instrumentation
Shielded Metal Arc Welding [5] Consumable electrode covered in flux, can weld any metal as long as they have the right electrode Construction, outdoors, maintenance
Submerged Arc Welding Automatic, arc submerged in granular flux
Magnetically Impelled Arc Butt both tube ends are electrodes; no protection gas; arc rotates fast along edge by applied magnetic field pipelines and tubes
Atomic Hydrogen Welding Two metal electrodes in hydrogen atmosphere Historical
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Oxyfuel gas weldingedit

 

Name Characteristics Applications
Question Answer
Air acetylene welding Chemical welding process, not popular Limited
Oxyacetylene welding Combustion of acetylene with oxygen produces high-temperature flame, inexpensive equipment Maintenance, repair
Oxygen/Propane welding Gas welding with oxygen/propane flame
Oxyhydrogen welding Combustion of hydrogen with oxygen produces flame Limited
Pressure gas welding Gas flames heat surfaces and pressure produces the weld Pipe, railroad rails (limited)
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Resistance weldingedit

 

Name Characteristics Applications
Question Answer
Resistance spot welding Two pointed electrodes apply pressure and current to two or more thin workpieces Automobile industry, Aerospace industry
Resistance seam welding[6] Two wheel-shaped electrodes roll along workpieces, applying pressure and current Aerospace industry, steel drums, tubing
Projection welding Semi-Automatic, Automatic, Welds are localized at predetermined points.
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Flash welding
Question Answer
Upset welding Butt joint surfaces heated and brought together by force
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Solid-state weldingedit

 

Name Characteristics Applications
Question Answer
Coextrusion Welding Dissimilar metals are extruded through the same die Joining of corrosion resistant alloys to cheaper alloys or alloys with more favorable mechanical properties
Cold pressure welding Joining of soft alloys such as copper and aluminium below their melting point Electrical contacts
Diffusion welding No weld line visible Titanium pump impellor wheels
Explosion welding Joining of dissimilar materials, e.g. corrosion resistant alloys to structural steels Transition joints for chemical industry and shipbuilding. Bimetal pipelines
Electromagnetic pulse welding Tubes or sheets are accelerated by electromagnetic forces. Oxides are expelled during impact Automotive industry, pressure vessels, dissimilar material joints
Forge welding The oldest welding process in the world. Oxides must be removed by flux or flames. Damascus steel
Friction welding Thin heat affected zone, oxides disrupted by friction, needs sufficient pressure Aerospace industry, railway, land transport
Friction stir welding A rotating non-consumable tool is traversed along the joint line Shipbuilding, aerospace, railway rolling stock, automotive industry
Hot pressure welding Metals are pressed together at elevated temperatures below the melting point in vacuum or an inert gas atmosphere Aerospace components
Hot isostatic pressure welding A hot inert gas applies the pressure inside a pressure vessel, i.e. an autoclave Aerospace components
Roll welding Bimetallic materials are joined by forcing them between two rotating wheels Dissimilar materials
Ultrasonic welding High-frequency vibratory energy is applied to foils, thin metal sheets or plastics. Solar industries-. Electronics. Rear lights of cars. Diapers.
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Other types of welding[edit]

Name Characteristics Applications
Question Answer
Electron beam welding Deep penetration, fast, high equipment cost
Electroslag welding continuous consumable electrode Welds thick workpieces quickly, vertical position, steel only, Heavy plate fabrication, construction,shipbuilding.
Flow welding Distortion is minimized, and the thermal cycle is relatively benign [7]. Joining rails in situ (in the form of thermit welding)
Laser beam welding Deep penetration, fast, high equipment cost Automotive industry
Laser-hybrid welding Combines LBW with GMAW in the same welding head, able to bridge gaps up to 2mm (between plates), previously not possible with LBW alone. Automotive, Shipbuilding, Steelwork industries
Percussion welding Following an electrical discharge, pressure is applied which forges the materials together Components of switch gear devices
Thermite welding Exothermic reaction between alumnium powder and iron oxide powder Railway tracks
Electrogas welding Continuous consumable electrode, vertical positioning, steel only Storage tanks, shipbuilding
Stud arc welding Welds studs to base material with heat and pressure
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