1. Welding
By Zach Parkinson
3-A

2. TIG Welding (GTAW Welding)
Gas Tungsten Arc Welding
In TIG welding an arc is formed between a non- consumable tungsten electrode and the metal being welded. Gas is fed through the torch to shield the electrode and molten weld pool. 
GTAW Welding is mostly used for high quality and precision welding.
TIG Welding (GTAW Welding)

3. MIG Welding (GMAW Welding)
Gas Metal Arc Welding
MIG welding is a commonly used high deposition rate welding process. 
It doesn't require a lot of skill to weld with MIG welding.
MIG Welding (GMAW Welding)

4. Flux Cored Welding (FCAW Welding)
Flux cored welding is a commonly used high deposition rate welding process, that adds the convenience of flux to the welding simplicity of MIG welding.
Flux Cored Welding (FCAW Welding)

5. Stick Welding (SMAW Welding)
Stick welding is one of the most widely used welding processes.
The flux covering the electrode melts during welding. 
This forms the gas and slag to shield the arc and molten weld pool. 
The slag must be chipped off the weld bead after welding.
Stick Welding (SMAW Welding)

6. Resistance Welding (RSW Welding)
Resistance welding uses the application of electric current and mechanical pressure to create a weld between two pieces of metal. 
Weld electrodes conduct the electric current to the two pieces of metal as they are forged together.
Resistance Welding (RSW Welding)

7. Electron Beam Welding (EBW Welding)
A fusion joining process that will produce a weld by directing a beam of high energy electrons to heat the metal being welded.
This welder also uses vacuum suction so that it can make pure and high quality welds.
Electron Beam Welding (EBW Welding)

8. Soldering and Brazing is where parts are joined without melting the base metal.
Soldering is mostly used for electrical connection
Brazing
Brazing is only used for mechanical joints because of high temperatures.
Brazing and Soldering

9. Welding Discontinuities
Incomplete Fusion
A weld discontinuity is when fusion does not occur between weld metal and fusion faces or adjoining weld beads.
Welding Discontinuities

10. Welding Discontinuities
Undercut
A groove melted into the base metal, left unfilled by weld metal.
Overlap
The protrusion of weld metal beyond the weld root.
Welding Discontinuities

11. Welding Discontinuities
Underfill
Where The filler metals extend below the adjacent surface of the base metal.
Incomplete Joint Penetration
In a groove weld; the metal does not extend through the joint thickness.
Welding Discontinuities

12. Weld Cracking Here is a example of weld cracking.
As you can see this is a very bad weld!!!
Weld Cracking

13. Here is a convex fillet weld without discontinuities.
I can tell this was made by a good welder.
Acceptable Welding.

14. Safety Equipment Safety Equipment Required For Welding TIG MIG
Flux Cored Welding
Stick Welding
Resistance Welding
Safety Glasses
1. Safety Glasses
2. Welding Hood
2. No welding Hood Required
3. Leather Welders Gloves
4. Leather Welders Jacket
4. Welders Jacket Not Required
5. Shoes Required
6. Preferably Jeans
Safety Equipment

16. Cited Sites www.weldingengineer.com/
Copyright © 1999 American Metallurgical Consultants
Retrieved on May 15, 2011
Cited Sites