Electrode wire for electric discharge machining and manufacturing method of the same

  • US 7,723,635 B2
  • Filed: 09/08/2005
  • Issued: 05/25/2010
  • Est. Priority Date: 04/01/2005
  • Status: Active Grant
First Claim
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1. An electrode wire for electric discharge machining, comprising:

  • a core;

    a covering layer formed on a periphery of the core; and

    grains formed on the covering layer, wherein the grains comprise a copper-zinc alloy including about 0.01 to 0.5 weight % of at least one additive element selected from the group consisting of aluminum, tin, magnesium, lanthanum, cerium, nickel, manganese, titanium, and zirconium,wherein the core comprises copper and a trace of unavoidable impurities, or comprises about 10 to 40 weight % of zinc, with the balance being of copper and a trace of unavoidable impurities,wherein the covering layer comprises about 37 to 49.5 weight % of zinc, with the balance being of copper and a trace of unavoidable impurities,wherein the grains comprise about 49.5 to 58 weight % of zinc, and about 0.01 to 0.5 weight % of the at least one additive element, with the balance being of copper and a trace of unavoidable impurities, andwherein the grains are spaced from one another on a periphery of the covering layer and the covering layer is formed between the grains to surround the grains.

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