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Short Essay On Welding Technology

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CHAPTER 1 INTRODUCTION
1.1 OVERVIEW
Modern welding technology has just begun before the end of the 19th century with the development of methods for generating localized high temperature zones. Welding of new materials and a large increase in the thickness of components, developed only gas flame welding, which improves the welding as a demand to the engineer's known, is no longer satisfactory and the metal inert gas welding, tungsten inert gas welding, electron and laser beam welding has come. Welding is the joining process which coalescence of material by heating at some temperature and pressure and also with or without filler rod. The welding is permanent joint which …show more content…
TIG welding is cleanest and most precise welding procedure available. The operator can change parameter during welding without stop of weld and also complete control on welding variable.
7. Possible welding in all position.
8. Distortion is low.

1.8 Limitation of (TAGS) Welding
1. The deposition rate is lower.
2. In case of thick section it is costly.
3. Process is slow compare to MIG.

1.9 TIG Welding Application
The TIG welding process is best suited for metal plate of thickness around 5- 6 mm. Thicker material plate can also be welded by TIG using multi passes which results in high heat inputs, and leading to distortion and reduction in mechanical properties of the base metal. In TIG welding high quality welds can be achieved due to high degree of control in heat input and filler additions separately. TIG welding can be performed in all positions and the process is useful for tube and pipe joint. The TIG welding process is extensively used in the so-called high-tech industry applications such as
1) Nuclear industry
2) Aircraft
3) Food processing industry
4) Maintenance and repair work
5) Precision manufacturing industry
6) Automobile industry
7) Welding of transistor casing, expansion blows and instrument diaphragm.
8) Fabrication work in rocket motor

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