High-carbon steel wire rod and wire excellent in drawability and methods of producing the same
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United States of America Patent
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Sep 9, 1997
Grant Date -
N/A
app pub date -
Oct 31, 1995
filing date -
May 25, 1993
priority date (Note) -
Expired
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Abstract
This invention provides high-carbon steel wire rod and wire excellent in drawability and methods of producing the same. The high-carbon steel wire rod or wire is characterized in that it contains, in weight percent, C: 0.90-1.10%, Si: not more than 0.40% and Mn: not more than 0.50%, is limited to P: not more than 0.02%, S: not more than 0.01% and Al: not more than 0.003%, the remainder being Fe and unavoidable impurities, and has a microstructure of, in terms of area ratio, not less than 80% upper bainite texture obtained by two-stepped transformation and an Hv of not more than 450. The high-carbon steel wire rod or wire may additionally contain Cr: 0.10-0.30% as an alloying component.
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