TYPES OF WELDING ARC & ARC INITIANTION METHODS

Types of the welding arc and arc initiation methods used in the welding processes are explained in this presentation.

WELDING ARC PHYSICS

SMAW VARIENTS

SMAW - Shielded Metal Arc Welding process is the one of the basic arc welding process. This presentation will explain varients of the SMAW process and advantages, disadvantages of the each process.

Joining of magnetic materials

Ferro magnetic materials (iron, nickel, cobalt)  are considered as magnetic materials. Magnetism and its types, reason for magnetism, problems encountered during welding in magnetic materials, remedies for the problems are explained in the below presentation.

SOLDERING

  Soldering is a process in which two or more items (usually metal) are joined together by melting and putting a filler metal (solder) into the joint, the filler metal having a lower melting point (below 450°C) than the adjoining metal. Soldering differs from welding in that soldering does not involve melting the work pieces.

HOT CRACKS & COLD CRACKS

A line on the surface of METAL or WELDED REGION along which it has split without breaking into separate parts. Crack is consider as most severe defect among  WELD DEFECTS. This presentation is define and explain  the types of cracks, crack promoting factors .

FRACTURE TOUGHNESS TESTING

                                                    FRACTURE TOUGHNESS TESTING

 Fracture toughness is a quantitative way of expressing a material's resistance to brittle fracture when a crack is present. This presentation gives the detail about how to calculate the fracture toughness.

CREEP

                                                              CREEP
   Creep is the tendency of a solid material to move slowly or deform permanently under the influence of mechanical stresses.Creep is more severe in materials that are subjected to heat for long periods, and generally increases as they near their melting point.

NITRIDING

NITRIDING

             Nitriding is one of the heat treatment method. The main objective of this method is case hardening of the steels. Below presentation is explain the nitriding process and types of layer presented in case harded metal surface.

DUPLEX STAINLESS STEEL

CORROSION AND IT'S TYPES