Plasma torch

Details Plasma torch Plasma torch

B - Operations, Transporting

23

K

B23K 10/00 (2006.01) B23K 10/02 (2006.01) H05H 1/34 (2006.01)

Patent

CA 2174317

A plasma torch of swirling plasma gas flow type is disclosed in which there are provided an electrode body having a forward end thereof and a nozzle that is arranged to enclose said forward end portion of the electrode and that is spaced therefrom across a plasma gas flow passage, characterized in that at least a portion of the said electrode body at which a pilot arc can be ignited is composed of either of a material that is high in its melting point and a mixture of the said high melting point material with either of a substance that is low in its work function and an oxide of the said substance.

Une torche à plasma du type à écoulement tourbillonnaire de gaz plasmagène comporte un corps d'électrode (15), ainsi qu'un ajutage (4) qui entoure une extrémité de la pointe du corps d'électrode (15) tout en laissant un passage (5) pour le gaz plasmagène. Au moins la partie du corps d'électrode (15), qui sert à allumer l'arc pilote, est formée d'une substance à point de fusion élevé ou bien de cette substance mélangée avec une substance à faible travail d'extraction ou un oxyde de cette substance à faible travail d'extraction.

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