| 摘要 |
The invention describes process gas mixtures for laser beam welding that contain at least one noble gas component. Pursuant to the invention the process gas mixture contains between 50 vpm and 15.0% by volume hydrogen. The process gas can preferably contain one or more of the noble gas components helium, argon and neon. Moreover, the process gas can contain nitrogen. The process gas mixtures can be used in a method for laser beam welding, especially for welding high-grade steels, wherein a focused laser beam is directed at the workpiece surface that is to be machined. Special benefits are associated with ternary or quaternary process gas mixtures with helium and/or neon, hydrogen and nitrogen (for austenitic steels) and helium and/or neon, hydrogen and argon (for titanium or titanium-stabilized steels).
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