Unit 1 GMAW Welding Processes Variants

• 1.1 Classification of welding processes 1.2 Gas Metal Arc Welding (GMAW) or Metal Inert Gas (MIG) Welding 1.2.1 Definition 1.2.2 Principle of operation 1.2.3 Welding parameters for different materials 1.2.4 Welding equipment 1.2.5 Different metals welded 1.2.6 Joint design 1.2.7 Advantages
• disadvantages & applications 1.3 CO2 Welding or Metal Active Gas (MAG) Welding 1.3.1 Definition 1.3.2 Principle of operation 1.3.3 Welding equipment 1.3.4 Welding variables and parameters 1.3.5 Joint design 1.3.6 Welding procedure 1.3.7 Advantages
• disadvantages & applications 1.4 Flux Cored Arc Welding (FCAW) 1.4.1 Definition and concept 1.4.2 Principle of operation 1.4.3 Welding equipment 1.4.4 Weldable metals 1.4.5 Joint design 1.4.6 Welding parameters 10 22.22 Program Name : Diploma Engineering Level : Diploma Branch : Fabrication Technology Subject Code: DI04055051 Subject Name : Welding Technology - 2 w.e.f. 2025-26 http://syllabus.gtu.ac.in/ Page no.3 of 10 1.4.7 Flux cored electrode wire and its functions 1.4.8 Advantages
• limitations & applications

Unit 2 GTAW & PAW Welding Processes

• 2.1 Gas Tungsten Arc Welding (GTAW) or Tungsten Inert Gas (TIG) Welding 2.1.1 Definition 2.1.2 Principle of operation 2.1.3 Welding parameters for different materials 2.1.4 Welding equipment 2.1.5 Base metals welded 2.1.6 Joint design 2.1.7 Advantages
• disadvantages & applications 2.2 Plasma Arc Welding (PAW) 2.2.1 Definition and concept 2.2.2 Principle of operation (a) Non-transferred arc process (b) Transferred arc process 2.2.3 Equipment 2.2.4 Process description 2.2.5 Welding parameters for different metals 2.2.6 Base metals welded 2.2.7 Joint design 2.2.8 Backing requirement 2.2.9 Comparison between PAW and TIG welding 2.2.10 Advantages
• disadvantages & applications 8 17.78

Unit 3 ESW, Stud & LBM Welding Processes

• 3.1 Electroslag Welding (ESW) 3.1.1 Definition and concept 3.1.2 Principle of operation 3.1.3 Conventional electroslag welding 3.1.4 Consumable guide electroslag welding 3.1.5 Welding equipment 3.1.6 Joint preparation 3.1.7 Welding parameters for different plate thicknesses 3.1.8 Advantages
• disadvantages & applications 3.2 Stud Welding 3.2.1 Definition and concept 3.2.2 Classification 3.2.3 Principle of operation (a) Non-conductor ferrule method 12 26.67 Program Name : Diploma Engineering Level : Diploma Branch : Fabrication Technology Subject Code: DI04055051 Subject Name : Welding Technology - 2 w.e.f. 2025-26 http://syllabus.gtu.ac.in/ Page no.4 of 10 (b) Semi-conductor cartridge method 3.2.4 Equipment 3.2.5 Stud welded metals 3.2.6 Advantages
• limitation & applications 3.3 Laser Beam Welding (LBW) 3.3.1 Definition & concept 3.3.2 Principle & theory of Operation 3.3.3 Forms of laser 3.3.4 Joint design 3.3.5 Advantages
• disadvantages & applications 3.3.6 Safety aspect

Unit 4 Dissimilar metal welding, Hardfacing & Jigs-Fixture

10 lecture hours

• 4.1 Welding of Dissimilar Metal 4.1.1 Concept of dissimilar metal welding 4.1.2 Techniques for dissimilar metal welding 4.1.3 Welding various dissimilar metals combinations 4.2 Hardfacing of materials 4.2.1 Definition and concept 4.2.2 Objectives of hardfacing 4.2.3 Types of surfacing (cladding
• built up, buttering) 4.2.4 Principle of operation
• steps involved 4.2.5 Hardfacing alloys 4.2.6 Base metals 4.2.7 Surfacing methods 4.3 Welding Jigs and Fixture 4.3.1 Introduction 4.3.2 Welding Jigs 4.3.3 Welding Fixtures 4.3.4 Consideration in fixture selection 4.3.5 Principles governing design of good welding jigs and fixtures 4.3.6 Various types of Jigs and Fixtures 8 17.78 Program Name : Diploma Engineering Level : Diploma Branch : Fabrication Technology Subject Code: DI04055051 Subject Name : Welding Technology - 2 w.e.f. 2025-26 http://syllabus.gtu.ac.in/ Page no.5 of

Unit 5 PQR, WPS, & WPQ and Welding Variables

• 5.1 Introduction of ASME Sec-IX 5.2 Definition of code & standard 5.3 Definition of PQR, WPS, & WPQ 5.4 Welding variables for SMAW, SAW, GMAW and GTAW processes (Essential
• Supplementary- Essential and Non-Essential) 5.5 Interpretation of Procedure Qualification Record (PQR) 5.6 Interpretation of Welding Procedure Specification (WPS) 5.7 Interpretation of Welder Performance Qualification (WPQ) 5.8 Difference between WPS and PQR 5.9 Type of Tests Required for PQR and WPQ 5.10 Welder position qualification table 07 15.56