Welder Red Seal · Question
In the GMAW process, which shielding gas mixture is most likely to achieve a true axial spray transfer on carbon steel?
Axial spray transfer in GMAW typically requires a high percentage of inert gas. A mixture of 90% Argon and 10% CO2 provides the stable arc characteristics of ar
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Question: In the GMAW process, which shielding gas mixture is most likely to achieve a true axial spray transfer on carbon steel?
Answer options:
- 100% CO2
- 75% Argon / 25% CO2 ✅ 90% Argon / 10% CO2
- 100% Helium
Correct answer: 90% Argon / 10% CO2
Explanation: Axial spray transfer in GMAW typically requires a high percentage of inert gas. A mixture of 90% Argon and 10% CO2 provides the stable arc characteristics of argon while the CO2 adds energy, promoting a smooth spray transfer.
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