Argon-CO2 gas mixture in welding electrodes

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Argon mixed gas carbon dioxide Mainly used for welding wire carbon steel and low alloy steel. Do not apply to stainless steel welding. Adding argon to CG reduces sputter better than using CO, alone, and if adding a small amount of CO, to argon, it retains the Spray Arc properties similar to that of oxygen. 

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into argon gas Small amounts are the same. GMAW welding with CO, mixed with another gas. When the 3. Transition Current of Spray Transfer is down, mixing CO. is more than 20% with a slightly higher current, Spray Transfer is obtained. at uniform arc, but if originally 0, down will reduce the level by approx. to get Spray Transfer at uneven arc. And the tires will be born as Short Circuiting and Globular Transfer 111.

Argon-3-10% Co, – Mixed shielding gas used for Spray Are and Short Circuiting Transfer for welding carbon steel of various thicknesses because this shielding gas can provide up to 2 types of Metal Transfer and CO mixture ratio. , very variable gas BNH CO, 55% is the most commonly used type for GMAW pulse welding of very thick low-alloy steels in difficult welding positions. and the resulting welds had less oxide than the welds used. Gas shielding type 98 Ar-2% O, good weld penetration depth. and less porous than using oxygen Mixed into argon gas, by mixing CO, at a ratio of 5-10%, a straight and narrow arc is obtained. Argon-11-20% Co, this gas mixture is used in narrow GAP welding, sheet metal welding in difficult welding positions and GMAW welding at high welding speeds. Mariam metals are carbon steel and alloy steel. Thin can be done with high welding speed. The melt through the back is less (Burn through) while the melting rate of the electrode. and high welding wire speed. When mixing CO, slightly affects the addition of welding water, that is, spatter will be less.

Argent-21-25% CO, (C25) – This mixed shielding gas is commonly known as short circuited CMAW welding for mild steel welding.

This gas can also be used for welding thick steel with high welding currents and provides a uniform arc that can control the melt pool. good weld shape and high welding rate

Argon – 50% CO, – This shielding gas is used for welding applications that require high heat input and deep penetration. The material to be welded should be more than 3 mm thick and can be welded in Difficult welding position (Out of Position) This type of gas is commonly used for short circuiting transfer pipe welding. Good metal water flow.

But not so much that the weld line sags. This advantage is suitable for welding pipes. Welding thin metal with this type of gas often penetrates. When welding using this type of shielding gas with high welding current, the metal transfer is similar to that of CO welding, but the spatter will be reduced because of the original argon.

Argon-75% CO, – CO, 75% CO mixture gas used for welding thick-walled pipes. Good sidewall melting. and high penetration Adding argon to make the arc uniform and reduce spatter.

Argon – Helium

Argon-helium mixed shielding gas used for non-ferrous welding such as aluminum, copper, nickel alloys and reactive metals. Remove the properties of helium added to argon, i.e. higher displacement and heat than argon. If you want to weld thick materials, the percentage of helium must be added. A minimum of 10 % helium alloy will affect the arc and mechanical properties of the weld. When increasing the percentage of helium will make the force Arc moves, spatter, and penetration increased. while the porosity is very small Using pure helium Welds with wide penetration depth and medium penetration depth However, the arcing Always increases as well A minimum of 20% argon is mixed with an indium paint to form and maintain a Spray Arc.

Argon-25% He (HE-25) – A less common shielding gas used for welding.

Aluminum

Argon-75% He (HE-75) is a commonly used shielding gas for welding. Aluminum that is thicker than 1 inch in a known location with an automatic welding machine. This type of gas is also used to weld copper 4 – 1/2 inches thick, which is a good heat conducting material. The mixed gas gives high heat input and less porosity.

Argon-90% He (HE-90) – This gas mixture is used for welding thick copper. and aluminum with a thickness of more than 3 inches, which the use of this mixed gas will give high Heat Input and provide quality marks. X-ray inspected welding and can also be used for short circuiting welding with high nickel alloy welding wire.

Argon – Nitrogen

nitrogen filling a small amount into the Ar-1% 0 mixed gas, to obtain a weld with The weld structure is complete austenite. In welding wire with Stainless Steel Type 347, the amount of nitrogen used is between 1.5-3%. The amount of nitrogen above 10% will smoke but the weld is still intact. When nitrogen is added more than 2%, porosity will occur with mild steel welding For single-line GMAW welding, if less than 2 % is added, pitting will occur in carbon steel welding for GMAW-line overlapping welding. When welding copper and copper alloys, there will be a lot of spatter.