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Unit One Basic Knowledge of Welding 1

Module 1 What Is Welding 1

Module 2 Heat Treatment of Steel 11

Module 3 Selection of Metals in Welding 17

Module 4 Effect of Welding on Structure of Steel 23

Unit Two Stresses and Cracking of Welding 33

Module 1 Stresses Occurring in Welding 33

Module 2 Welding Cracking 39

Unit Three Welding Methods 48

Module 1 Shielded Metal Arc Welding 48

Module 2 Submerged Arc Welding Fundamentals of Process 59

Module 3 CO2 Welding 66

Module 4 Gas Tungsten Arc Welding 77

Module 5 Gas Metal Arc Welding 86

Module 6 Resistance Welding 94

Unit Four Cutting 101

Module 1 Flame Cutting 101

Module 2 Plasma Arc Cutting 108

Unit Five Inspection 115

Module 1 Radiographic Examination 115

Module 2 Ultrasonic Examination 123

Module 3 Magnetic Particle Examination 128

Module 4 Penetrant Examination 137

Appendix 145

Appendix A Selective Reading Materials 145

Text One Technology of SMAW 145

Text Two Technology of Submerged Arc Welding 150

Text Three Flux-Cored Arc Welding 156

Appendix B Terms of Welding 177

Appendix C Vocabulary 190

References 198