engleski

Optimized process gases for mechanized welding applications

In welding of metallic materials technologically and economically best results can only be obtained, when all the parameters relevant for the welding process are properly set up for the welding task. Besides the welding machine and the filler material this also applies to the choice of the process gas. The use of special gas mixtures can enable a great improvement of the welding process, the shielding gas changes turns from a commodity to an optimising tool. Shielding gases, when optimised with respect to the welding application, can enable higher productivity and provide better quality of the weld. To achieve this, the gas components with their specific properties must be carefully combined. In GMA welding of structural steels for example an addition of helium to the gas can lead to higher travel speeds without impairing penetration profile or producing undercuts. Gas-shielded arc welding of aluminium or nickel alloys is more and more carried out using a process gas containing very small amounts of oxygen or carbon dioxide, which provides excellent arc stability and weld appearance. In mechanised welding applications having a good arc stability is particularly important, since the machine can, unlike a manual welder, hardly react to glitches in the arc.

welding gases; higher productivity; better quality

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