welding process

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ultrasonic welding

friction welding

in friction welding (solid state welding process) coalescence is produced by utilizing the heat obtained from the mechanically induced rotating motion between the rubbing surfaces.

diffucion welding

in this process, base metal is melted by means of heat

it is characterized by

laser beam welding

laser beam welding is defined as a fusion welding process and coalescence is achieved by utilizing the heat obtained from a concentrated coherent light beam and impinging upon the surface to be joined.this process uses the energy in an extremely concentrated beam of coherent,mono_chromatic light to melt the weld metal.

electron beam welding

electron beam welding is definedas a fusion welding process wherein coalescence is produced by the heat obtained from a concentrated beam of high velocity electron.when high velosity electrons strike the workpiece, kinetic energy is transformed into thermal energy causing localized heating and melding of the weld metal

oxyfuel welding

this process is also known as oxy acetylene welding. heat is supplied by the combustion of acetylene in a stream of oxygen both gases are supplied to the torch through flexible hoses. heat from this torch is lower and far less concentrated than that from an electric arc

resistance welding

resistance welding is a geoup of welding process in whisch coalescence is produced by the heat obtained from the resistance of the work to the flow of electric current in a circuit of which the work is a part and by the application of pressure. no filler metal is needed in this process

arc welding

arc welding is a method of permanently joining two or more metal parts. it consists of combination of different welding processes wherein coalescence is produced by heating with an electric arc,(mostly without the application of pressure) and with or without the use of filler metals depending upon the base plate thickness

plasma arc welding

this pr ocess is similar to TIG. a non-consumable electrode is used in this process. arc plasma is a temporary state of gas. the gas gets ionized after the passage of electric current and becomes a conductor of electricity. the plasma consists of free electrons, positive ions, and neutral particles.

gas-tungsten arc welding (gtaw)

this process is also known as tungste-inert gas (tig) welding. this is sililar to the gas-metal arc welding process. difference being the electrode is non consumable and does not provive fillar metal in this case.

gas-metal arc welding (gmaw)

in this process an inert gas such as argon, helium, carbom dioxide or a mixture of them are used to prevent atmospheric contamination of the weld

flux-cored arc welding (fcaw)

this process is similar to the shielded-arc stick welding process with the main difference being the flux is inside the welding rod

shielded metal arc (smaw) or stick welding

this is arc welding process wherein coalescence is produced by heating the workpiece with an electric arc setup between a flux-coated electrode and the workpiece. the electrode is in a rod form coated with flux.

submerged arc welding (saw)

this is another type of arc welding process, in which coalescence is produced by heating the workpiece with an electric arc setup between the bare electrode and the work piece

Welding types

fusion welding

solid state welding

in this process, joining of parts takes place by application of pressure alone or a combination of heat and pressure. no filler metal is used.

welding

welding is a process in which two or more parts are joined permanently at their touching surfaces by a suitable application of heat and/or pressure.