Welding Processes

Learn about the physics of welding processes. The course is divided in seven parts. It will cover the entire spectrum of welding processes that are commonly used for engineering applications.

It begins with a general survey and classification of welding processes based on various methodologies with discussions on heat source and the principles behind heat generation. There will be discussions on the most widely used arc welding process and the physics behind Arc. What is arc and how is heat generated in Arc? What are the reactions in an arc? The course will further move to discuss the processes such as gas tungsten arc welding, the physics and the application of such a process and parameters that would affect the stability of these process.

The course will proceed with discussions about consumable welding processes with its focus on Gas Metal Arc Welding and the variants of this process. Learners will also see how the process characteristics change the metal transfer characteristics and its behaviour. The course will talk about Laser and Electron Beam Welding and end with solid state welding processes such as friction welding, ultrasonic welding and explosive welding, which does not involve melting

 

 

Introduction to the course.
Classification of welding processes and definition of welding arc.
Physics of welding arc - Part 01.
Physics of welding arc -Part 02.
Physics of welding arc -Part 03.
Physics of welding arc -Part 04.
Fundamentals of ionisation in welding arc.
Electrical conductivity of welding arc.
Electrical resistivity of welding arc.
Heat transfer inside the arc.
Arc ignition mechanisms Part - I.
Arc ignition mechanisms Part - II.
Principles of Gas Tungsten Arc Welding.
Shielding gases for arc welding.
Selection of shielding gases for engineering alloys.
Arc welding power sources Part 01.
Arc welding power sources Part 02.
Arc welding power sources Part 03.
Variations in GTAW process.
Square wave, variable polarity, GTAW with filler, hot wire GTAW.
Dual gas GTAW and Plasma Welding processes.
Multi cathode GTAW and Activated GTAW.
Buried GTAW and Rate controlling parameters of GTAW.
Introduction to consumable welding processes.
Melting rate of consumable wires.
Physics of droplet transfer in consumable welding.
Modes of droplet transfer - Part 1.
Modes of droplet transfer - Part 2.
Modes of droplet transfer - Part 3.
Shielded Metal Arc Welding.
Flux cored arc welding - Introduction.
Electrode fluxes and process characteristics of flux cored arc welding.
Flux cored arc welding - Process characteristics.
Advances in gas metal arc welding - Pulsed GMAW.
Advances in gas metal arc welding - Controlled dip short circuiting processes.
Submerged arc welding.
Resistance welding - Fundamentals.
Resistance spot welding - Part 01.
Resistance spot welding - Part 02.
Resistance spot welding - Part 03.
Resistance spot welding - Part 04.
Variants in resistance welding - Part 1.
Variants in resistance welding - Part 2.
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