electric arc welding
welding brass
underwater welding
steel welding
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Argon is used as a shielding gas in electric arc welding processes. At the high temperatures that welding requires, the metals being welded become highly reactive to the elements in the atmosphere. Contamination from these elements can lead to brittle welds, instability in the welding arc, and a variety of other issues. To combat this, argon and other inert gases are sprayed around the welding arc to displace the atmosphere that would normally be present. This prevents contamination, leaving behind clean, strong welds. There are other gases and systems that can be employed for the same effect. Carbon dioxide is an example of a different gas that does the same thing and flux cored wire, which releases shielding gas when it is melted, is an example of a different system.
Only two of the noble gases, helium and argon, are cost effective enough to be used in welding. These inert gases are used in gas tungsten arc welding, and also in gas metal arc welding for the welding of non-ferrous metals.
A. Electric Arc Welding: Yes, argon is commonly used in electric arc welding processes, such as Gas Tungsten Arc Welding (GTAW) or Tungsten Inert Gas (TIG) welding, and Gas Metal Arc Welding (GMAW) or Metal Inert Gas (MIG) welding. It provides an inert atmosphere that prevents oxidation and other chemical reactions that can weaken the weld.
B. Welding Brass: Argon can be used in the welding of brass. However, it’s often mixed with other gases like helium or hydrogen to improve the quality of the weld.
C. Underwater Welding: While argon is used in many types of welding, underwater welding typically uses a process called “wet” or “underwater” stick welding, which doesn’t require an inert gas. Instead, it uses a special type of electrode. So, argon is not typically used in underwater welding.
D. Steel Welding: Yes, argon is used in steel welding, particularly in processes like TIG and MIG welding. It’s often used in a mixture with carbon dioxide for welding steel.
So, argon is used in electric arc welding and steel welding, and can be used in welding brass, but is not typically used in underwater welding.
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