By Zach Parkinson 3-A. TIG Welding (GTAW Welding) Gas Tungsten Arc Welding In TIG welding an arc is formed between a non- consumable tungsten electrode.

By Zach Parkinson 3-A

Welding

TIG Welding (GTAW Welding)

Gas Tungsten Arc WeldingIn 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.

MIG Welding (GMAW Welding)

o Gas Metal Arc Weldingo MIG welding is a

commonly used high deposition rate welding process. 

o It doesn't require a lot of skill to weld with MIG welding.

Flux Cored Welding (FCAW Welding)

Flux Cored 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.

Stick Welding (SMAW Welding)

Stick 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.

Resistance Welding (RSW Welding)

× Resistance 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.

Electron Beam Welding (EBW Welding)

Electron Beam 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.

Brazing and Soldering

Soldering and Brazing is where parts are joined without melting the base metal.

Soldering ◦ Soldering is mostly used

for electrical connection Brazing

◦ Brazing is only used for mechanical joints because of high temperatures.

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

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

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.

Weld Cracking

Here is a example of weld cracking.

As you can see this is a very bad weld!!!

Acceptable Welding.

Here is a convex fillet weld without discontinuities.

I can tell this was made by a good welder.

Safety Equipment

Safety Equipment Required For Welding TIG MIG Flux Cored

Welding Stick Welding Resistance

Welding

1. Safety Glasses

1. Safety Glasses

1. Safety Glasses

1. Safety Glasses

1. Safety Glasses

2. Welding Hood 2. Welding Hood 2. Welding Hood 2. Welding Hood 2. No welding Hood Required

3. Leather Welders Gloves

3. Leather Welders Gloves

3. Leather Welders Gloves

3. Leather Welders Gloves

3. Leather Welders Gloves

4. Leather Welders Jacket

4. Leather Welders Jacket

4. Leather Welders Jacket

4. Leather Welders Jacket

4. Welders Jacket Not Required

5. Shoes Required

5. Shoes Required

5. Shoes Required

5. Shoes Required

5. Shoes Required

6. Preferably Jeans

6. Preferably Jeans

6. Preferably Jeans

6. Preferably Jeans

6. Preferably Jeans

$1,650.00

$862.00 $290.00

$2,268.00

$5,567.10

Welder Pricing

TigMig Flux Cored Stick Resistance

Cited Sites

§ www.weldingengineer.com/§ Copyright © 1999 American Metallurgical

Consultants § Retrieved on May 15, 2011