Introduction
Welding is a fabrication method in which two or more parts are fused together using heat, pressure, or both to produce a joint as they cool. Welding is typically applied to metals and thermoplastics, but it can also be applied to wood. A weldment is the name given to the fully welded junction.
WELDING PROCESS
1 ARC WELDING
To melt metals at the welding site, these procedures require a welding power supply to create and maintain an electric arc between an electrode and the base material. They can use either DC or AC, as well as consumable or non-consumable electrodes. A shielding gas, an inert or semi-inert gas, is occasionally used to protect the welding area, and filler material is sometimes employed as well.
2 GAS WELDING
It is accomplished by burning fuel gases with the assistance of oxygen, resulting in a concentrated high-temperature flame. This flame attacks the weld area directly, melting the weld surface as well as the filler material. After cooling, the melted halves of the welding plates diffused into one another, forming a weld connection. Most common metals used in daily life can be joined using this welding procedure.
3 ELECTRON BEAM WELDING
Electron beam (EB) welding is a fusion welding technology that uses an electron cannon to create electrons that are then accelerated to high speeds utilising electrical fields. Using magnetic fields, a high-speed stream of electrons is carefully focussed and applied to the materials to be connected. As the electron beam collides with the workpieces, it generates kinetic heat, forcing them to melt and join together.
4 SOLID-STATE WELDING
Without the use of brazing filler metal, solid state welding causes coalescence at temperatures below the melting point of the base materials being welded. The base metals are not melted to form a metallurgical connection. Heat may or may not be used in this welding. Solid state bonding methods are another name for these procedures.