Stock material or miscellaneous articles – All metal or with adjacent metals – Having composition – density – or hardness gradient
Patent
1985-12-04
1987-08-11
Rutledge, L. Dewayne
Stock material or miscellaneous articles
All metal or with adjacent metals
Having composition, density, or hardness gradient
428675, 428658, 428677, 428941, 4273839, 427406, 219 69W, 174126CP, B23K 3522
Patent
active
046861530
ABSTRACT:
An electrode wire for wire electric discharge machining a workpiece at high speed and high accuracy and a process for preparing the same are provided. The electrode wire comprises a core wire made of a copper clad steel wire, 10 to 70% of the sectional area of the copper clad steel wire being occupied by copper, and a copper-zinc alloy layer covering the core wire. The copper-zinc alloy layer is prepared by coating the core wire with zinc by electroplating or hot galvanizing, followed by heating to disperse copper in the zinc layer to convert the same into a copper-zinc alloy layer wherein the concentration of zinc is increased gradually along the radially outward direction. The preferable thickness of the copper-zinc alloy layer ranges from 0.1 to 15 microns and the average concentration of zinc in the copper-zinc alloy layer is preferably less than 50% by weight but not less than 10% by weight.
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patent: 4424432 (1984-01-01), Kaneko et al.
Ogura Yoshio
Takayama Teruyuki
Tominaga Haruo
Yamaguchi Tetsuo
Fujikura Ltd.
Rutledge L. Dewayne
Zimmerman John J.
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