1. TIG lesson Lesson )

2. ARC Welding Arc welding is a processes where metals are melted and joined together using intense heat produced by an electric arc. (about 1400 o c for steel) There are 3 main types of ARC Welding that you will be looking at in this course : MMA Manual Metal Arc (also called Stick welding or Shielded Metal Arc Welding - SMAW) MIG - Metal Inert Gas welding (also called Gas Metal Arc Welding – GMAW) TIG – Tungsten Inert Gas welding (also called Gas tungsten Arc Welding -GTAW) (Today we will look at MIG and TIG welding)

3. Tungsten Inert Gas Welding - TIG (also called Gas tungsten Arc Welding -GTAW) TIG Welding is becoming more common in welding but is still mostly used by professional welders. TIG is a more controlled welding process and is better than MIG for non-steel welding e.g. Aluminium. In TIG Welding the electrode made of Tungsten. It makes an arc with the base metal and produces a molten pool of metal. Additional metal (filler rod) is usually added into the molten metal pool The tungsten electrode does not melt in this process. A flow of an inert gas passes out of the welding torch during welding. This inert gas (usually ARGON) acts as a shield to protect the weld process. TIG welding is not available on the simulator so we will look at real TIG welding

4. TIG Welding Equipment (filler rod not shown)