Method of producing cold-rolled, high-strength steel strip with good plasticity and isotropic properties
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United States of America Patent
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May 25, 1999
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N/A
app pub date -
Dec 4, 1996
filing date -
Dec 16, 1995
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Expired
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Abstract
A method of producing cold-rolled, high-strength steel strip with good plasticity and isotropic properties out of steel comprising no more than 0.08% carbon, no more than 10% silicon, no more than 1.8% manganese, between 0.010 and 0.10% phosphorus, no more than 0.02% sulfur, no more than 0.08% aluminum and no more than 0.008% nitrogen by weight plus one or more of the elements titanium, vanadium, niobium, and zirconium, the remainder being iron, by hot rolling, cold rolling, and recrystallization annealing; followed by temper rolling. The steel contains either three times as much titanium or six times as much niobium or zirconium as nitrogen.
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