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Lesson 1
The Basics of Arc Welding
Lesson 2
Common Electric
Arc Welding Processes
Lesson 3
Covered Electrodes for Welding
Mild Steels
Lesson 4
Covered Electrodes for Welding Low Alloy Steels
Lesson 5
Welding Filler Metals for Stainless Steels
Lesson 6
Carbon & Low Alloy
Steel Filler Metals -
GMAW,GTAW,SAW
Lesson 7
Flux Cored Arc Electrodes Carbon Low Alloy Steels
Lesson 8
Hardsurfacing Electrodes
Lesson 9
Estimating & Comparing Weld Metal Costs
Lesson 10
Reliability of Welding Filler Metals
TABLE OF CONTENTS LESSON II COMMON ELECTRIC ARC WELDING PROCESSES 2.1 INTRODUCTION .............................................................................. 1 2.2 SHIELDED METAL ARC WELDING  ............................................... 1 2.2.1 Equipment & Operation ..................................................................... 2 2.2.2 Welding Power Sources .................................................................... 2 2.2.3 Electrode Holder................................................................................ 4 2.2.4 Ground Clamp ................................................................................... 4 2.2.5 Welding Cables ................................................................................. 4 2.2.6 Coated Electrodes ............................................................................ 4 2.3 GAS-TUNGSTEN ARC WELDING .................................................. 5 2.3.1 Equipment & Operation ..................................................................... 6 2.3.2 Power Sources .................................................................................. 7 2.3.3 Torches.............................................................................................. 10 2.3.4 Shielding Gases ................................................................................ 11 2.3.5 Electrodes ......................................................................................... 12 2.3.6 Summary ........................................................................................... 13 2.4 GAS METAL ARC WELDING  .......................................................... 13 2.4.1 Current Density .................................................................................. 14 2.4.2 Metal Transfer Modes ........................................................................ 15 2.4.3 Equipment and Operation .................................................................. 17 2.4.4 Power Source.................................................................................... 18 2.4.5 Wire Feeder ...................................................................................... 19 2.4.6 Welding Gun ...................................................................................... 20 2.4.7 Shielding Gases ................................................................................ 21 2.4.7.1 Short Circuiting Transfer .................................................... 22 2.4.7.2 Spray Arc Transfer ............................................................ 23 Section Nr. Section Title Page
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