Plasma cutting torch electrode with an Hf/Zr insert
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United States of America Patent
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Jun 28, 2005
Grant Date -
Oct 7, 2004
app pub date -
Mar 10, 2004
filing date -
Mar 14, 2003
priority date (Note) -
Expired
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Abstract
An emissive electrode insert formed from an alloy containing hafnium and zirconium. The insert typically contains at least about 80% hafnium by weight and about 0.1 to about 8% zirconium by weight. The invention also relates to a plasma torch electrode formed from an electrode body with a cavity into which such an emissive insert is fitted, to a plasma torch utilizing such an electrode, and to a plasma cutting process for cutting a steel workpiece, in which such a plasma torch is employed.
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