Welding

 Welding is a process of joining two or more pieces of metal or thermoplastics by heating them to a molten state and allowing them to cool and solidify into a single, strong and permanent joint. Welding can be done using a variety of techniques such as arc welding, gas welding, laser welding, and electron beam welding.

            The choice of welding technique depends on the type and thickness of the materials being welded, the welding position, and the required strength of the joint. Welding is a critical process in many industries, including construction, automotive, aerospace, and shipbuilding, and requires skilled workers trained in the proper techniques and safety practices.

Types of Welding :

 It's Classsified by it's state, 

            i. Liquid state (or) Homogeneous (or) Fusion Process

            ii. Solid State (or) Autogeneous

This following welding techniques are mostly using,

 3.   1.   Stick Welding (Shielded Metal Arc Welding):

This is the most basic welding process. It involves using a stick electrode coated in flux to create an electric arc, which melts the metal and fuses it together.

 2.   MIG Welding (Metal Inert Gas Welding):

This welding technique uses a continuous wire feed to create an electric arc between the wire and the work piece, melting the wire and fusing it with the base metal.

      3.   TIG Welding (Tungsten Inert Gas Welding):

TIG welding uses a tungsten electrode to create an electric arc that heats the work piece and filler metal, which are both melted and fused together.

     

      4.   Flux-Cored Welding:

Similar to MIG welding, but uses a special wire that is filled with flux to shield the weld from the atmosphere and provide a cleaner weld.

      5.   Gas Welding:

This technique uses a flame to heat the work piece and the filler metal, which are then melted and fused together.

      6.   Plasma Arc Welding:

This welding process uses a high-velocity jet of plasma to melt and fuse the metal.

      7.   Laser Welding:

This technique uses a highly concentrated beam of light to melt and fuse the metal. It is often used in high-precision applications, such as in the aerospace industry.