B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
327/114, 204/96.
B23K 11/30 (2006.01) B23K 35/02 (2006.01) B23K 35/22 (2006.01) H05B 7/08 (2006.01) H05H 1/34 (2006.01)
Patent
CA 1134457
ABSTRACT OF THE DISCLOSURE The present invention provides a non-consumable electrode for plasma-arc welding in a medium of carbon-dioxide- based mixtures, comprising a holder made of copper or copper alloys, and a cylindrical insert made of hafnium and embedded flush in said holder, said insert having on its surface a layer of hafnium oxycarbide, characterized in that the insert contains a layer of graphite applied to the layer of hafnium oxycarbide, the height and the diameter of said cylindrical insert being chosen in accordance with the following ratio: h = (0.25 to 0.75) d, wherein h is the height of the active insert and d is the diameter of the insert. Such an electrode allows such welding to be effected at arc currents in excess of 400 A with an operating life suitable for commercial use. Again the elec- trode allows such welding at arc currents permitting the welding of low carbon and low alloy steels more than 6 mm thick and also without edge preparation at speeds equal to or greater than conventional welding speeds.
326754
Bolotnikov Arkady L.
Bykhovsky David G.
Kiselev Viktor N.
Medvedev Alexandr Y.
Rossomakho Yakov V.
Marks & Clerk
Vsesojuzny Nauchno-Issledovatelsky Proektno-Konstruktorsky I. Te
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