Wire electrode for the spark-erosive cutting of hard metal
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United States of America Patent
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-
Feb 19, 2002
Grant Date -
Nov 22, 2001
app pub date -
Dec 29, 2000
filing date -
Jan 12, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and a wire electrode for the spark-erosive cutting of hard metal, whereby the wire electrode has a core and at least one outer coat surrounding the core and wearing during cutting. To avoid corrosion, as, for example, pitting, a wire electrode is chosen, the wearing outer coat of which consists of a metal or a metal alloy which is not nobler than the binder contained in the hard metal, and the metal or the metal alloy has an electrode potential which is less than or equal to .phi..sub.0 =-0.28 V, referred to a standard hydrogen electrode.
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