Describe, with the aid of a diagram(s), Tungsten Inert Gas welding (TIG), under each of the following headings:
- Principle of operation
- Electrode type
- Method of preventing oxidation
- Applications. - Leaving Cert Engineering - Question c - 2021
Question c
Describe, with the aid of a diagram(s), Tungsten Inert Gas welding (TIG), under each of the following headings:
- Principle of operation
- Electrode type
- Method o... show full transcript
Worked Solution & Example Answer:Describe, with the aid of a diagram(s), Tungsten Inert Gas welding (TIG), under each of the following headings:
- Principle of operation
- Electrode type
- Method of preventing oxidation
- Applications. - Leaving Cert Engineering - Question c - 2021
Step 1
Principle of operation
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Answer
Tungsten Inert Gas (TIG) welding operates by creating an arc between a non-consumable tungsten electrode and the base metal. The process uses an inert gas, typically argon, to shield the weld area from atmospheric contamination. This inert gas protects the molten weld pool from oxidation and other adverse reactions. Additionally, a filler metal can be introduced to the weld pool to facilitate the joining of materials, if necessary. A high-frequency generator is employed to start the arc and maintain a steady current for the welding process.
Step 2
Electrode type
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Answer
The electrode used in TIG welding is a non-consumable tungsten electrode, which is capable of withstanding high temperatures without melting. Generally, the electrode is paired with a filler rod that can be added to the weld pool as needed.
Step 3
Method of preventing oxidation
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Oxidation is prevented by the use of an inert gas, primarily argon, which creates a shield around the weld area. This shielding gas prevents oxygen and other contaminants from coming into contact with the molten metal during the welding process.
Step 4
Applications
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TIG welding is widely utilized for welding aluminum components and stainless-steel pipes due to its ability to produce high-quality welds. The precision and control offered by TIG welding make it suitable for applications requiring intricate and clean welds.
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