Free Essays on Gas Tungsten Arc Welding

1 FUSION WELDING Fusion welding is a joining process in which the coalescence of metals is accomplished by fusion. The major fusion welding processes are listed below: Gas welding Oxyacetylene gas welding (OAW) Arc welding Shielded metal arc welding (SMAW) Gas tungsten arc welding (GTAW) Plasma arc welding (PAW) Gas metal arc welding (GMAW) Submerged arc welding (SAW) Electroslag welding (ESW) High-energy beam welding Electro beam welding (EBW) Laser beam welding (LBW) 1.1 Gas Tungsten Arc Welding (GTAW) 1.1.1 Description of the Process GTAW consists of an AC/DC arc burning between a non-consumable electrode and the work piece to melt the joint area. The area of the arc is enveloped in a protective gas shield which protects the weld pool and electrode from contamination while allowing a stable arc to be maintained. The filler wire is added either by hand, or in the mechanized process, by feed rollers attached to the torch. 1.1.2 Application Common applications consists of high quality welding on stainless steels; aluminium and its alloys; copper; nickel alloys and rare materials such as titanium and zirconium. Mild steels are welded when full penetration welds are required within certain tolerances, both in size and x-ray quality. Used widely in the aerospace, chemical and nuclear industries. 1.1.3 Electrical Conditions DC (direct current) - most normally used for GTAW welding of stainless steels and heat resisting steels, mild and low alloy steels, copper, nickel alloys, lead, silver, titanium and other metals that do not contain aluminium, magnesium or their alloys. The electrode must be connected to the negative terminal, where one third of the heat is generated. Two thirds of the heat of the arc is generated at the positive pole. A tungsten electrode connected to the positive pole would overheat and melt causing... Free Essays on Gas Tungsten Arc Welding Free Essays on Gas Tungsten Arc Welding 1 FUSION WELDING Fusion welding is a joining process in which the coalescence of metals is accomplished by fusion. The major fusion welding processes are listed below: Gas welding Oxyacetylene gas welding (OAW) Arc welding Shielded metal arc welding (SMAW) Gas tungsten arc welding (GTAW) Plasma arc welding (PAW) Gas metal arc welding (GMAW) Submerged arc welding (SAW) Electroslag welding (ESW) High-energy beam welding Electro beam welding (EBW) Laser beam welding (LBW) 1.1 Gas Tungsten Arc Welding (GTAW) 1.1.1 Description of the Process GTAW consists of an AC/DC arc burning between a non-consumable electrode and the work piece to melt the joint area. The area of the arc is enveloped in a protective gas shield which protects the weld pool and electrode from contamination while allowing a stable arc to be maintained. The filler wire is added either by hand, or in the mechanized process, by feed rollers attached to the torch. 1.1.2 Application Common applications consists of high quality welding on stainless steels; aluminium and its alloys; copper; nickel alloys and rare materials such as titanium and zirconium. Mild steels are welded when full penetration welds are required within certain tolerances, both in size and x-ray quality. Used widely in the aerospace, chemical and nuclear industries. 1.1.3 Electrical Conditions DC (direct current) - most normally used for GTAW welding of stainless steels and heat resisting steels, mild and low alloy steels, copper, nickel alloys, lead, silver, titanium and other metals that do not contain aluminium, magnesium or their alloys. The electrode must be connected to the negative terminal, where one third of the heat is generated. Two thirds of the heat of the arc is generated at the positive pole. A tungsten electrode connected to the positive pole would overheat and melt causing...

Caution

Caution: before reading this essay I just want to let you know that this book just *censored*ing sucks!Ok, now you may continue! I recieved a 90 for this paper out of 100. Daniel Roke, an experienced Australian stud farmer, has been hired to investigate a series of horse dopings throughout Englands racing circuit. Dan, hoping to break free from his dull and tedious life in Australia, accepted the offer when it was presented to him by The Earl of October. Seeing as how October was one of the most respected and successful people in the business, Dan was offered 20,000 pounds for the completion of his job. With his family in mind Dan set off to Octobers stables where he first began the mission that would change his life forever. In Dick Franciss newest mystery novel, For Kicks, Daniel Roke discovers his true self by risking life and limb trying to expose the secret underground world of horse doping. Disguised as a stable lad, Dan makes his way through some of the dirtiest stables in England starting at Octobers and working his way down to Hedly Humbers, all while earning the reputation of a criminal. Dans investigation takes him to places hed never been before and makes him an enemy as well as a friend to many. Dan quickly learns that people who would abuse horses would do far worse to humans and that as soon as you enter Humbers stable its no holds barred. The author uses Daniel Roke, a well-known stud farmer in Australia, to depict the harsh realities of horse racing that many overlook. Throughout Dans adventure he begins to realize how badly stable lads are treated and how often they are stereotyped as being terrible people. He also finds it extremely difficult to stand by and allow people to abuse horses the way they. Dan absolutely hates the disrespect and cruelty that the horses have to withstand and is completely shocked when he witnesses it first hand. This ...