| 摘要 |
PROBLEM TO BE SOLVED: To provide an anode torch for heating plasma that reduces side arc flowed to an object to be heated through a nozzle from electrodes extending lifetime and increasing working efficiency of heating apparatus. SOLUTION: In a plasma torch includes an anode electrode and a nozzle surrounding the anode electrode, a conductivity of the anode electrode is made higher than that of the nozzle. For example, the anode electrode is made from Zr-Cu or Cr-Cu, and the nozzle is made from Cr-Zr-Cu, preferably the anode electrode is made from oxygen free copper and the nozzle is made from Zr-Cu, Cr-Cu or Cr-Zr-Cu. |
