TIG welding process using a non-consumable electrode that contains 1 to 2 % thoria mix along with the core tungsten or tungsten with 0.15 to 0.40 % zirconia. The pure tungsten electrodes are less expensive but also carry less current but thoriated tungsten electrode carries high current and more desirable because they can strike and maintain a stable at with relative ease. Tungsten inert gas welding offers several advantages that account for its popularity and its use in agriculture and many other industries. Let us have a deep insight into the advantages of TIG welding in this article.
Advantages of TIG welding:
- It produces high quality and clean welds.
- No slag is produced so welds are not weakened.
- The weld is automatically protected by the inert gas during the welding process so welds are corrosion resistant, more ductile, and stronger.
- This process can apply to any position of welding likewise horizontal, vertical or flat.
- It can be performed by both automatic and manual technique.
- It easily applied to the thin material and used for a wide range of metal thickness.
- There is less distortion of the workpiece because of the small heat-affected zone.
- Only the necessary amount of filler metal is added to the welding puddle so there is no spatter or sparks are produced.
- Use one shielding gas mainly Argon for all applications.
- In this process finishing process required little or less sometimes grinding or preparation before it can be painted.
- It is the preferred choice in most intricate works, where the shape of each and every weld joint counts.
Disadvantages of TIG welding:
- It is a slow process.
- A more complicated process so that highly skilled labour is required.
- Less economical than consumable electrode for sections thicker than 3/8 inch.
- Tungsten inclusion.
- A welder is exposed to the huge intensities of light.
- This process is also more expensive.
- Sensitive to drafts.
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