Welding Essay

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Welding is a construction else sculptural process that seams materials, usually metals or thermoplastics, by creating combination.
This is in different with fusing and brazing (which involves melting a lower-melting-point material between the work pieces to form a bond between them) it works without melting the work pieces.
This is often done by melting the work pieces and adding a stuffing material to form a pond of molten material (known as the weld pool) that cools to become a strong joint and sometimes pressure is used in unification with heat to produce the weld.
Many different energy sources can be used for welding such as:-
 Electric arc,
 Gas flame,
 Ultrasound,
 A laser ,
 Friction and
 An electron beam.

 HISTORY
The history …show more content…

 ARC WELDING.
This type of welding uses a welding power source to generate and preserve an electric arc between an electrode and the base material to melt metals at the welding point. They can use either direct (DC) or alternating (AC) current and consumable or non-consumable electrodes. The welding area is sometimes protected by some type of inert/inactive or semi-inert gas known as a shielding gas and filler or stuffing material is sometimes used as well.
 GAS WELDING.
It is also one of the very famous type of welding in which the most common gas welding process is oxy-fuel welding also known as oxyacetylene welding. It is one of the oldest and most multipurpose welding process but in modern years it has become less popular in industrial applications but is still widely used for welding pipes and tubes, as well as for repair work.
The equipment or the kit used is relatively cheap and easy to use by the beginners. It generally generates the combustion of acetylene and oxygen to produce a welding flame/blaze which is of temperature about 3100 °C. The flame produced is less focused than an electric arc therefore can causes slower weld cooling which can lead to greater residual stresses and weld distortion. But though it comforts the welding of high alloy steels. A similar process usually called oxy-fuel cutting is used to cut

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