| 摘要 |
PURPOSE: A wire electrode for spark-erosive cutting of hard metal and method therefor is provided, to prevent the corrosion, in particular of the not eroded surfaces of the hard metal block. CONSTITUTION: A wire electrode for the spark-erosive cutting of hard metal comprises a core and at least one outer coat surrounding the core and wearing during cutting, wherein the wearing outer coat consists of a metal or of a metal alloy which is not nobler than the binder contained in the hard metal, and wherein the metal or the metal alloy has an electrode potential, which is less than or equal to Phi0=-0.28 V, referred to a standard hydrogen electrode. A method for the spark-erosive cutting of hard metal by a wire electrode which has a core and at least one outer coat surrounding the core and wearing during cutting, wherein 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 wherein the metal or the metal alloy has an electrode potential which is less than or equal to Phi0=-0.28 V, referred to a standard hydrogen electrode.
|
