COLD ROLLED STEEL SHEET EXCELLENT IN PRESS WORKABILITY AND CHEMICAL CONVERTIBILITY AND ALLOYED GALVANIZED STEEL SHEET EXCELLENT IN PRESS WORKABILITY AND POWDERING RESISTANCE

PROBLEM TO BE SOLVED: To produce a cold rolled steel sheet and an alloyed galvanized steel sheet producible without requiring special production control and having excellent chemical convertibility and powdering resistance as well as excellent press formability. SOLUTION: This cold rolled steel shee...

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Bibliographic Details
Main Authors TSUKATANI ICHIRO, KASE TOMOHIRO, YODA RIKA
Format Patent
LanguageEnglish
Published 20.01.1998
Edition6
Subjects
ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:PROBLEM TO BE SOLVED: To produce a cold rolled steel sheet and an alloyed galvanized steel sheet producible without requiring special production control and having excellent chemical convertibility and powdering resistance as well as excellent press formability. SOLUTION: This cold rolled steel sheet has a compsn. contg., by mass, <=0.003% C, <=0.3% Si, 0.05 to 0.5% Mn, <=0.02% P, <=0.02S S, 0.01 to 0.1% Al, Ti: 3.43N+1.5S<=Ti<=0.040%, 0.007 to 0.015% Nb, 0.03 to 0.12% Cr, <=0.005% N, and the balance Fe with inevitable impurities. Furthermore, as for the alloyed galvanized steel sheet, in the above components, the content of P may be prescribed to >=0.008% and the upper limit of the Ti content to 0.035%. Both steel sheets have characteristics in the prescribed containing ranges of Nb and Cr in particular.
Bibliography:Application Number: JP19960192832