Industrial Oxygen Gas is used within the Steel metal manufacturing, Steel cutting and Steel welding industries. Oxygen gas enhances the arc stability and reduces the surface tension of molten metal. Oxygen gas is used in combination with a fuel gas either Acetylene gas or LPG (Propane) gas within the welding process, cutting process, heating process and brazing process.
Oxygen gas is used as an oxidizer with the acetylene gas and LPG (Propane) gas in order to boost the flame properties of the fuel gas (acetylene gas or LPG gas), which will result in the increase of the flame temperature.
Oxygen within the gas welding process (Oxy-Fuel welding / Oxyacetylene welding / Oxy Welding)
During the Oxy-fuel welding process a welding torch is used to weld the metals together. Two pieces of metal are heated to a temperature that produces a shared pool of molten metal. The molten pool of metal is then normally supplied with additional metal filler. The filler material being used will depend on the metals that are required to be welded together.
Oxygen gas causes oxidation in the welding; this makes it not suitable for welding aluminium, magnesium, copper, and some exotic metals. Oxygen gas makes the shielding gas oxidize the electrode; this can lead to porosity in the deposit if the electrode does not contain sufficient deoxidizers.
Oxygen gas can also be mixed with Argon gas in the GMAW (Gas Metal Arc Welding) process when welding carbon steel, stainless steel, and low alloy steels. Oxygen gas helps to stabilize the welding arc. The mixture of Argon gas with Oxygen gas needs to be determined; this will depend on the type of steel that will be welded.
Oxygen within the gas cutting process (Oxy-Fuel cutting / Oxyacetylene cutting / Oxy cutting)
During the gas cutting process a cutting torch is used to heat the metal to a kindling temperature. When this temperature is reached a stream of oxygen gas is directed on to the kindling metal where the metal then burns in that oxygen gas and then flows out of the cut as an oxide slag.
A propane/air flame burns at ± 2 000 °C, a propane/oxygen flame is capable to burn at ± 2 500 °C, while the acetylene/oxygen flame is capable to burn at ± 3 500 °C.
Oxygen within the heating process
During the gas heating process, oxygen gas is used to heat the metal either for the gas welding or gas cutting processes. Oxygen gas helps to increase the flame temperature to a temperature at which the metal turns molten.
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