How To Welding Co2. When we weld high carbon steels we almost always will be using an undermatching filler metal that is a filler metal with lower tensile strength than the base metal. Water extinguishers are not a good idea in a welding shop since you are standing next to a whole lot of electricity.
You will want to tinker a bit with inductance control or slope control which helps in setting down the arc. MAG welding is where you use 100 co2 as a Sheilding gas instead of 7525 argonco2 mix. Co2 is an active gas and causing oxidation when it is around electrode tungsten in the TIG welder.
When we weld high carbon steels we almost always will be using an undermatching filler metal that is a filler metal with lower tensile strength than the base metal.
A low inductance setting is good for thin sheet metal. Using 100 co2 makes the weld pool hotter and you get better penetration. Working Of Carbon Arc Welding As shown in the below figure a single electrode is used in this process. A long carbon arc is often desirable in order to prevent contamination of the weld metal with the carbon monoxide given off by the carbon electrode under the energy of the arc.