| 摘要 |
PURPOSE:To economically produce an electrode for a vacuum valve circuit breaker having high performance by preliminarily incorporating elements which generate wetting into molten copper, uniformly dispersing metallic particles which are not solutionized with copper therein and sulidifying the molten metal under the pressure. CONSTITUTION:The electrode for the vacuum valve circuit breaker is produced by uniformly dispersing the metallic particles which have >=400 deg.C difference in the m.p. from copper or are not solutionized with copper into a copper or copper alloy matrix. At least one kind selected from the elements which generate wetting with the molten copper or copper alloy and the metallic particles, i.e., Ti, Cr, Zr, V, and Nb are incorporated into the molten metal and thereafter the metallic particles are penetrated and dispersed into the molten metal. The size of the metallic particles is made about 5-200mu in the case of using Ta and W and about 5-500mu in the case of Cr, Co, Mo, and Fe. The elements to generate the wetting are added at about 0.05-3.0 at/O by 1-45amt. of the metallic particles to be added by volume. Such molten metal is cast into a metallic mold mold preheated to about 300-500 deg.C and is pressurized under about 200-2,000kg/cm<2> pressure to solidify. |
