PRODUCTION OF HOT ROLLED STARTING PLATE FOR CONTINUOUSLY ANNEALED COLD ROLLED STEEL SHEET OR CONTINUOUSLY HOT-DIP GALVANIZED COLD ROLLED STEEL SHEET EXCELLENT IN WORKABILITY

PRODUCTION OF HOT ROLLED STARTING PLATE FOR CONTINUOUSLY ANNEALED COLD ROLLED STEEL SHEET OR CONTINUOUSLY HOT-DIP GALVANIZED COLD ROLLED STEEL SHEET EXCELLENT IN WORKABILITY

PURPOSE:To produce a hot rolled starting plate for continuously annealed cold rolled steel sheet or continuously hot-dip galvanized cold rolled steel sheet used for automobile parts, etc., and excellent in workability in high yield. CONSTITUTION:A steel having a composition containing 0.01-0.020% C,...

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Hauptverfasser: UEDA TOSHIZUMI, MATSUZU NOBUHIKO, KOYAMA KAZUO
Format: Patent
Sprache:eng
Schlagworte:
ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
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
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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creator UEDA TOSHIZUMI
MATSUZU NOBUHIKO
KOYAMA KAZUO
description PURPOSE:To produce a hot rolled starting plate for continuously annealed cold rolled steel sheet or continuously hot-dip galvanized cold rolled steel sheet used for automobile parts, etc., and excellent in workability in high yield. CONSTITUTION:A steel having a composition containing 0.01-0.020% C, 0.05-0.15% Mn,
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CONSTITUTION:A steel having a composition containing 0.01-0.020% C, 0.05-0.15% Mn, &lt;=0.015% P, 0.004-0.015% S, 0.05-0.15% Al, and &lt;=0.0025% N is hot-rolled at a temp. not lower than the transformation point. Coiling is done so that the occurrence of coil slackening is prevented at the time of coiling at 630-700 deg.C, and the cooling velocity at the edge of the coil is regulated to &lt;=7 deg.C/min from &gt;=550 deg.C downward. Further, directly after the starting of coiling, the inside peripheral part can be tightened by extending a mandrel. 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subjects ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
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
TREATMENT OF ALLOYS OR NON-FERROUS METALS
title PRODUCTION OF HOT ROLLED STARTING PLATE FOR CONTINUOUSLY ANNEALED COLD ROLLED STEEL SHEET OR CONTINUOUSLY HOT-DIP GALVANIZED COLD ROLLED STEEL SHEET EXCELLENT IN WORKABILITY
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