| 摘要 |
PURPOSE:To develop an electrode for arc cutting having less oxidation consumption and heat consumption and having stable arc characteristics, by mixing specific ratios of Ru powder and Y2O3 powder, press molding the mixed powder, and thereafter sintering the same. CONSTITUTION:40-90wt.% Ru powder having 15.0mum average grain size and 99.9% purity and 60-2wt.% Y2O3 powder having 5.7mum average grain size and 99.9% purity are mixed and granulated by using a suitable binder. Said granulated goods are press molded in a mold, are thereafter presintered for 15min at 500 deg.C in a stream of hydrogen and are subjected to the main sintering in succession to produce the electrode material. The electrode having excellent characteristics as the electrode for air plasma cutting, electrode for plasma thermal spraying and heat resisting oxidation resisting electrode and having the arc characteristics can be obtd.
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