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1. (WO2018055799) CONTINUOUS STEEL CASTING METHOD

Pub. No.:    WO/2018/055799    International Application No.:    PCT/JP2017/009906
Publication Date: Fri Mar 30 01:59:59 CEST 2018 International Filing Date: Tue Mar 14 00:59:59 CET 2017
IPC: B22D 11/04
B22D 11/059
B22D 11/128
B22D 11/16
B22D 11/20
Applicants: JFE STEEL CORPORATION
JFEスチール株式会社
Inventors: ARAMAKI Norichika
荒牧 則親
FURUMAI Kohei
古米 孝平
MIKI Yuji
三木 祐司
Title: CONTINUOUS STEEL CASTING METHOD
Abstract:
This method relates to the technique of providing, on the inner wall surface of a mold copper plate for continuous casting, differing-thermal-conductivity metal-filled areas which are filled with a metal in which, with respect to the mold copper plate, the ratio of the thermal conductivity difference is at least 20%. By setting the interval in the width direction and the interval in the casting direction of the differing-thermal-conductivity metal-filled areas to less than or equal to a value defined by a prescribed numerical formula, it is possible to prevent surface cracking due to uneven cooling of the solidified shell in the initial solidification period during continuous casting, and to suppress center segregation occurring in the thickness center of a cast piece.