Download Gas Tungsten Arc Welding PDF

TitleGas Tungsten Arc Welding
File Size183.6 KB
Total Pages38
Table of Contents
                            Gas Tungsten Arc Welding
GTAW
Shielding Gas
Equipment & Accessories
GTAW Equipment & Accessories
Types Of GTAW Power Source
Power Source
Characteristic Of GTAW            Power Source
High Frequency Unit
Water Cooling System
GTAW TORCH
Pedal Switch
Argon Gas Cylinder- Pressure Regulator + Flow Meter
Slide 14
Argon Gas Cylinder
Back Purging
Tools For GTAW
Tungsten Rod
Pulsed GTAW
Filler Wire
ASME Classification Of Filler Wire
Dos & Don'ts In GTAW
Slide 23
Slide 24
Defects In GTAW
Crack
Lack Of Fusion
Porosity
Undercut
Lack Of Penetration*
Excess Penetration*
Overlap
Suck Back*
Under flush
Burn through*
Tungsten Inclusion
Stray Arcing
Thanks
                        
Document Text Contents
Page 1

Gas Tungsten Arc Welding

By HARDISH TRIVEDI

1PRESENT BY:HARDISH TRIVEDI

Page 2

GTAW

• Fusion Welding Process

• Arc Between Non-Consumable Tungsten
Rod And Work

• Arc & Weld Pool Shielded By Argon

• Filler Wire Separately Added To Weld Pool

• Welding Torch & Tungsten Rod Cooled by
Flow OF Argon / Cooling Water

2PRESENT BY:HARDISH TRIVEDI

Page 19

Pulsed GTAW

• Power Source Provides Two different Current
Levels“Background” and “Peak”at regular
interval

• “Background” & “Peak” are above and below
the Average Current

• Best Suitable for Full Penetration Open Root
Pass Welding

• Ideal for Root Pass by Automatic Machine
Welding

19PRESENT BY:HARDISH TRIVEDI

Page 20

Filler Wire

• Added Separately to the weld pool.

• Compatible to base metal

• Used in cut length for manual welding.

• Used from layer wound spool for
automatic welding.

• Sizes :- 0.8, 1, 1.2, 1.6, 2, 2.4 & 3 mm

20PRESENT BY:HARDISH TRIVEDI

Page 37

Stray Arcing

Cause Remedy

1) HF Not In Operation
2) Inadequate Skill of Welder

1) Rectify HF Unit
2) Train the Welder

Arc Strikes

37PRESENT BY:HARDISH TRIVEDI

Page 38

Thanks

38PRESENT BY:HARDISH TRIVEDI

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