Patent ID: 6362447
Filing Date: 2002-03-26
Classification: B23H

Abstract:
An electrode wire for an electrical discharge machining apparatus, comprising:a core metallic wire formed of Cuâ€”0.02 to 0.2 WT % Zr alloy or Cuâ€”0.15 to 0.25 WT % Snâ€”0.15 to 0.25 WT % In alloy, and a Cuâ€”Zn alloy covering layer formed of a mixing composition of &agr; and &bgr; phases, wherein a concentration of Zn of said Cuâ€”Zn alloy covering layer in a shallow layer below a surface of said Cuâ€”Zn alloy covering layer is lower than the concentration of Zn in an inner portion of said Cuâ€”Zn alloy covering layer that is further from said surface than said shallow layer.