MOLD POWDER FOR CONTINUOUSLY CASTING MEDIUM CARBON STEEL CAST SLAB AND METHOD FOR CONTINUOUSLY CASTING MEDIUM CARBON STEEL CAST SLAB

PURPOSE: To provide mold powder for continuous casting which prevents the development of the longitudinal crack on a cast slab caused by the development of uneven solidified shell in a mold, and to provide a method for continuously casting medium carbon steel cast slab. CONSTITUTION: This mold powde...

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Bibliographic Details
Main Authors NAKAYAMA NOBUTAKA, MIYAMOTO AKIRA, SHIMIZU MASAAKI, OKAMOTO HIROMI, WATANABE KEIJI, KONDO HIROKAZU, SAKAI HIDENORI
Format Patent
LanguageEnglish
Published 15.10.1996
Edition6
Subjects
CASTING
CASTING OF METALS
CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
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Summary:PURPOSE: To provide mold powder for continuous casting which prevents the development of the longitudinal crack on a cast slab caused by the development of uneven solidified shell in a mold, and to provide a method for continuously casting medium carbon steel cast slab. CONSTITUTION: This mold powder for continuous casting has a compsn. containing essentially CaO and SiO2 in a ratio CaO/SiO2 (by wt.%) of 1.2-1.6 and 2-6wt.% in total of MgO+LiO2 . The molten powder is cooled at least to <=400 deg.C at 1500-2500 deg.C/min cooling rate and solidified to measure the crystallizing ratio of the obtd. solidified powder. The cast slab containing carbon in the range of 0.08-0.16wt.% is produced with the continuous casting by using the mold powder for continuous casting having >=50% evaluated crystallizing ratio.
Bibliography:Application Number: JP19950098101