METHOD OF HIGH TENSION COLD STEEL SHEET

This invention relates to high-tension cold-rolling steel sheet, which has a low yield point, low yield ratio, high ductility and 40- 80 kg/mm2 tensile strength. The steel sheet, which contains 0.01- 0.12% carbon, under 1.2% silicon, 1.0-1.8% Mn, 0.010.10% Sol. Al, and the remainder Fe and impuritie...

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Bibliographic Details
Main Authors AKISUE, OSAMU, AMADA, DERUAKI
Format Patent
LanguageEnglish
Korean
Published 22.02.1985
Edition4
Subjects
CHEMISTRY
GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS
MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS
METALLURGY
METALLURGY OF IRON
MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
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Summary:This invention relates to high-tension cold-rolling steel sheet, which has a low yield point, low yield ratio, high ductility and 40- 80 kg/mm2 tensile strength. The steel sheet, which contains 0.01- 0.12% carbon, under 1.2% silicon, 1.0-1.8% Mn, 0.010.10% Sol. Al, and the remainder Fe and impurities, is first hot-rolled. The hot-rolled steel sheet is then cold-rolled. The hot-rolled steel sheet is then heated at 30-800 C, for 20 sec.2min. Continuous annealing treatment is then performed on the sheet at 30-300 C/sec. cooling velocity to a temperature under 250 C.
Bibliography:Application Number: KR19800004513