Drawing process and wire obtained by drawing process
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United States of America Patent
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Sep 29, 2020
Grant Date -
Apr 12, 2018
app pub date -
Apr 21, 2016
filing date -
Apr 24, 2015
priority date (Note) -
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Abstract
A steel wire has a microstructure that is completely ferritic, a mixture of ferrite and cementite or a mixture of ferrite and pearlite and has a weight content of carbon C such that C<0.05% and a weight content of chromium Cr such that Cr<12%. The process for drawing the wire comprises: at least one first uninterrupted series of steps of drawing the wire from a diameter D to a diameter d′, at least one second uninterrupted series of steps of drawing the wire of diameter d′ to a diameter d, and one or more intermediate steps between the first and second uninterrupted series of steps of drawing the wire, the wire having a temperature less than or equal to 300° C. during the or each intermediate step.
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