EDM wire
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United States of America Patent
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Nov 29, 2011
Grant Date -
Jan 29, 2009
app pub date -
Nov 29, 2006
filing date -
Dec 1, 2005
priority date (Note) -
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Abstract
An EDM wire having an outer coating of gamma phase brass with an overlayer of continuous unalloyed zinc or ductile epsilon phase brass entrapping the gamma phase and a process for manufacturing the EDM wire is provided. A second process for synthesizing a ductile epsilon phase brass coating on the aforementioned and other substrates is also provided. The first process includes coating a copper bearing metallic core with zinc. The zinc coating is then converted to gamma phase brass via a diffusion anneal and subsequently re-coated with zinc prior to being cold drawn to its finish diameter.
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