目 录前言二维码索引Unit One Basic Knowledge of Welding1Module 1 Welding2Module 2 Stresses Occurring in Welding10Module 3 Weld Crack16Practical Training One22Unit Two Welding Methods24Module 1 Shielded Metal Arc Welding25Module 2 Submerged Arc Welding34Module 3 CO2 Shielded Arc Welding41Module 4 Gas Tungsten Arc Welding48Module 5 Metal Inert-Gas Welding56Module 6 Resistance Welding61Practical Training Two67Unit Three Cutting69Module 1 Gas Cutting70Module 2 Plasma Arc Cutting75Practical Training Three81Unit Four Nondestructive Examination83Module 1 Radiographic Inspection84Module 2 Ultrasonic Inspection89Module 3 Magnetic Particle Inspection94Module 4 Penetrant Inspection101Practical Training Four107Unit Five Welding Standard109Module 1 Welding Quality Standard—Shipbuilding and Repair Quality Standard forNew Construction110Module 2 Quality Levels for Imperfections—ISO 5817:2023120Practical Training Five136Appendixes138Appendix A Vocabulary139Appendix B Terms of Welding151References164