| 摘要 |
An electrode for use in a plasma arc torch has an insert designed to improve the service life of the electrode, particu-larly for high current processes. The electrode comprises an elongated electrode body formed of a high thermal conductivity material and having a bore disposed in a bottom end of the electrode body. The bore can be cylindrical or ring-shaped. An insert comprising a high thermionic emissivity material, and in some embodiments, a high thermal conductivity mate-rial, is disposed in the bore. The insert can be ringed-shaped or cylindrical.
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