Weldingis a process of joining two metal pieces by the application of heat.Weldingis the least expensive process and widely used now a days in fabrication.Weldingjoints different metals with the help of a number of processes in which heat is supplied either electrically or by mean of a gas torch.

Weldingis the process of joining together two pieces of metal so that bonding takes place at their original boundary surfaces”. When two parts to be joined are melted together, heat or pressure or both is applied and with or without added metal for formation of metallic bond.

Weldingis afabricationorsculpturalprocessthat joins materials, usuallymetalsorthermoplastics, by using highheatto melt the parts together and allowing them to cool causingfusion. Welding is distinct from lower temperature metal-joining techniques such asbrazingandsoldering, which do notmeltthe base metal.

In addition to melting the base metal, a filler material is typically added to the joint to form a pool of molten material (theweld pool) that cools to form a joint that, based on weld configuration (butt, full penetration, fillet, etc.), can be stronger than the base material (parent metal).Pressuremay also be used in conjunction with heat, or by itself, to produce a weld. Welding also requires a form of shield to protect the filler metals or melted metals from being contaminated oroxidized.

Many differentenergy sourcescan be used for welding, including a gasflame(chemical), anelectric arc(electrical), alaser, anelectron beam,friction, andultrasound. While often an industrial process, welding may be performed in many different environments, including in open air,under water, and inouter space. Welding is a hazardous undertaking and precautions are required to avoidburns,electric shock, vision damage, inhalation of poisonous gases and fumes, and exposure tointense ultraviolet radiation.

Until the end of the 19th century, the only welding process wasforge welding, whichblacksmithshad used for millennia to join iron and steel by heating and hammering.Arc weldingandoxy-fuel weldingwere among the first processes to develop late in the century, and electric resistance welding followed soon after. Welding technology advanced quickly during the early 20th century as the world wars drove the demand for reliable and inexpensive joining methods. Following the wars, several modern welding techniques were developed, including manual methods likeshielded metal arc welding, now one of the most popular welding methods, as well as semi-automatic and automatic processes such asgas metal arc welding,submerged arc welding,flux-cored arc weldingandelectroslag welding. Developments continued with the invention oflaser beam welding,electron beam welding,magnetic pulse welding, andfriction stir weldingin the latter half of the century. Today, the science continues to advance.Robot weldingis commonplace in industrial settings, and researchers continue to develop new welding methods and gain greater understanding of weld quality.

balding is the process of joining of two irons or two different metal...

Weldingis afabricationorsculpturalprocessthat joins materials, usuallymetalsorthermoplastics, by using highheatto melt the parts together and allowing them to cool causingfusion. Welding is distinct from lower temperature metal-joining techniques such asbrazingandsoldering, which do notmeltthe base metal.

In addition to melting the base metal, a filler material is typically added to the joint to form a pool of molten material (theweld pool) that cools to form a joint that, based on weld configuration (butt, full penetration, fillet, etc.), can be stronger than the base material (parent metal).Pressuremay also be used in conjunction with heat, or by itself, to produce a weld. Welding also requires a form of shield to protect the filler metals or melted metals from being contaminated oroxidized.

Many differentenergy sourcescan be used for welding, including a gasflame(chemical), anelectric arc(electrical), alaser, anelectron beam,friction, andultrasound. While often an industrial process, welding may be performed in many different environments, including in open air,under water, and inouter space. Welding is a hazardous undertaking and precautions are required to avoidburns,electric shock, vision damage, inhalation of poisonous gases and fumes, and exposure tointense ultraviolet radiation.

Until the end of the 19th century, the only welding process wasforge welding, whichblacksmithshad used for millennia to join iron and steel by heating and hammering.Arc weldingandoxy-fuel weldingwere among the first processes to develop late in the century, and electric resistance welding followed soon after. Welding technology advanced quickly during the early 20th century as the world wars drove the demand for reliable and inexpensive joining methods. Following the wars, several modern welding techniques were developed, including manual methods likeshielded metal arc welding, now one of the most popular welding methods, as well as semi-automatic and automatic processes such asgas metal arc welding,submerged arc welding,flux-cored arc weldingandelectroslag welding. Developments continued with the invention oflaser beam welding,electron beam welding,magnetic pulse welding, andfriction stir weldingin the latter half of the century. Today, the science continues to advance.Robot weldingis commonplace in industrial settings, and researchers continue to develop new welding methods and gain greater understanding of weld quality.

welding is a fabrication or sculptural process that joins materials usually metals or thermoplastic by using high heat to melt the parts together and and allowing them to cool causing fusion.