Plasma cutting process with dual gas flow
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United States of America Patent
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Issued Date -
Oct 28, 2004
app pub date -
Mar 11, 2004
filing date -
Mar 18, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention relates to a plasma arc cutting process for cutting a metal workpiece, in which a dual-gas-flow torch fitted with an electrode with an emissive insert is used, the said torch delivering a central gas stream and an annular gas stream, the said annular stream being delivered peripherally to the central gas stream, characterized in that the central gas stream contains a hydrogen-nitrogen mixture and the peripheral gas stream contains carbon dioxide. The invention also relates to a unit comprising such a torch.
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