Delta-phase brass electrode wire for electroerosion machining, and method for manufacturing same
AssigneeThermocompact
InventorsMichel Ly, Gérald Sanchez
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Abstract
An electrode wire for electroerosion machining, the electrode wire including a metal core, made of one or more layers of metal or metal alloy. On the metal core there is a coating having an alloy different from that of the metal core, and containing more than 50% by weight of zinc. The coating includes delta-phase copper-zinc alloy.
Claims16
An electrode wire for machining by electrical discharge machining, said electrode wire comprising:
- a metallic core, made of one or more layers of metal or of metallic alloy,
- on the metallic core, a coating having an alloy different from that of the metallic core and containing more than 50% by weight of zinc,
- wherein the coating comprises delta-phase copper-zinc alloy.
A process for manufacturing an electrode wire for machining by electrical discharge machining, said electrode wire comprising a metallic core and a coating comprising delta-phase copper-zinc alloy, which process comprises the following stages:
- (a) taking a blank wire made of metal,
- (b) producing, on this blank wire, a coating having zones, the mean composition of which corresponds to the range of existence of the delta-phase copper-zinc alloy,
- (c) bringing the coated blank wire to a temperature of between 559° C. and 700° C., at which temperature the copper-zinc alloy delta phase is stable,
- (d) suddenly cooling the coated blank wire so as to keep the delta-phase copper-zinc alloy in a metastable state at ambient temperature.
Dependencies are inferred from the claim text.