Copper wire for a magnet wire, magnet wire using same, and method for fabricating copper wire for a magnet wire
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United States of America Patent
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Issued Date -
Nov 19, 2009
app pub date -
Jan 6, 2009
filing date -
May 13, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A copper wire for a magnet wire, a magnet wire using same, and a method for fabricating the copper wire for the magnet wire. The copper wire for the magnet wire is made from a casting material. The casting material is fabricated by continuous upward drawing from a molten copper or a molten copper alloy. An average crystal grain diameter of a columnar crystal structure formed at a surface layer of the casting material is 200 to 300 μm. An upward drawing rate is 4 m/min to 5 m/min and a temperature of the molten copper or the molten copper is 1100 to 1200° C.
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