Joining and Welding Technology

At the end of this course, the students should be able to: 1. provide the definition, scope and classification of the three main metallurgical engineering joining processes: welding, brazing and soldering; 2. discuss how the concept of heat affected zone (HAZ) is to be understood by the students; 3. exemplify theoretical knowledge and practical skills involved in welding, brazing and soldering; and 4. explain the scope and limitations of both welding and brazing.

Introduction: Role of welding, brazing and soldering in manufacturing processes. Welding: Definition, principle, classification and scope. Types of welding processes – gas, arc, resistance, flash, friction and electro-welding, among others. Brief treatment of new processes such as explosive welding, plasma welding and electro-beam welding. Weld rods and fluxes protective atmosphere, weld defect and weldability of metals and alloys. The effect of welding processes and mechanical properties of weldments. Heat Affected Zone (HAZ). Heat treatment of welds, design of welded joint; brazing: scope and limitations, types, processes, brazing of commercially important ferrous and non-ferrous metals and alloys; soldering: processes, soldering alloys and application of soldering techniques.