Mechanical Engineering - Workshop Technology - Discussion
Discussion Forum : Workshop Technology - Section 1 (Q.No. 16)
16.
In welding copper alloys with TIG arc welding
Answer: Option
Explanation:
Direct current with straight polarity (DCEN) is used when TIG welding copper alloys, the electrode is positive and the workpiece is negative. This polarity is preferred when welding copper alloys because it creates a stable arc with a deep and concentrated heat at the point of contact between the electrode and the workpiece, which helps to achieve a consistent weld.
Discussion:
14 comments Page 2 of 2.
Nirmal singh said:
8 years ago
It is for the straight polarity.
Shan said:
8 years ago
DCRP is rarely used. Because it tends to melt the electrode. AC is used for All and Mg DCRP COPPER AND STAINLESS STEEL etc.
Sultan said:
4 years ago
AC is used for?
Please explain in detail.
Please explain in detail.
Nvk said:
1 year ago
The correct answer is alternating current (AC) is used.
When TIG (Tungsten Inert Gas) arc welding copper alloys, alternating current (AC) is typically used. This is because AC provides several benefits, including:
- Better cleaning action: AC helps to remove oxidation and other surface contaminants from the copper alloy, resulting in a cleaner weld.
- Reduced porosity: AC helps to reduce porosity in the weld by providing a more consistent and controlled arc.
- Improved weld penetration: AC allows for better weld penetration, especially in thicker sections of copper alloy.
Direct current (DC) with straight polarity (DCEP) or reversed polarity (DCRP) is not typically used for welding copper alloys with TIG, as it can lead to:
- Poor arc stability.
- Increased porosity.
- Reduced weld penetration.
AC, on the other hand, provides a more stable and controlled arc, making it the preferred choice for welding copper alloys with TIG.
When TIG (Tungsten Inert Gas) arc welding copper alloys, alternating current (AC) is typically used. This is because AC provides several benefits, including:
- Better cleaning action: AC helps to remove oxidation and other surface contaminants from the copper alloy, resulting in a cleaner weld.
- Reduced porosity: AC helps to reduce porosity in the weld by providing a more consistent and controlled arc.
- Improved weld penetration: AC allows for better weld penetration, especially in thicker sections of copper alloy.
Direct current (DC) with straight polarity (DCEP) or reversed polarity (DCRP) is not typically used for welding copper alloys with TIG, as it can lead to:
- Poor arc stability.
- Increased porosity.
- Reduced weld penetration.
AC, on the other hand, provides a more stable and controlled arc, making it the preferred choice for welding copper alloys with TIG.
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