The role of making argon gas
The conductivity of Ar gas is very small, and it is also a monoatomic gas. It does not absorb heat due to decomposition at high temperatures. Therefore, the heat of the arc burning in Ar gas is less. Therefore, argon arc welding arc in all types of gas shielded welding It is easier to ignite and the arc is stable and soft. The density of argon gas is relatively large, it is not easy to float and float during protection, and it is easy to form a protective cover, so its protective effect is good. In the fusion-gas argon arc welding, the wire metal is easy to have a stable axial jet transition with minimal spatter.
Argon gas for welding is mostly bottled argon, and argon gas cylinders are painted in silver grey, with the green "Argon" written on it. At present, the volume of argon cylinders commonly used in China is 33L, 40L, and 44L.
Argon is used as a protective gas for welding, and generally requires a purity of 99.9%-99.999% (volume fraction).
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