To stably carry out casting when continuously casting high aluminum steel with a sol.Al concentration of 0.1 mass% and to sufficiently remove scales immediately after hot rough rolling.
Mold flux is used for continuous casting of ordinary steel having the sol.Al concentration of 0.1-1.5 mass%, a Si concentration of 0.3-2.0 mass%, and a C concentration of 0.05-0.18 mass%. The mold flux has a ratio (CaO/SiO2) of 1.0-2.0 obtained by dividing a CaO content by a SiO2 content, contains one or two kinds of 1.0-8.0 mass% of P2O5 and 0.5-5.0 mass% of B2O3, has a solidification temperature of 1,050-1,200C and a viscosity of 0.5-2.5 dPa s at 1,300C, and has cuspidine as a main crystal phase in a sample at a normal temperature where once-melted flux is cooled at a temperature-falling rate of 10C per min. When the high aluminum steel with the sol. Al concentration of 0.1 mass% is continuously cast, scale removal by high pressure water or the like is accelerated, and hot rolled steel sheet having reduced insular scales is obtained.
HANAO MASAHITO
KAWAMOTO MASAYUKI
OTA KOZO
MIZUNO YASUHIRO
FUJINAKA SHINGO
OKADA HIKARI
| JP2002346708A | 2002-12-04 | |||
| JPH10258343A | 1998-09-29 | |||
| JPH05317913A | 1993-12-03 | |||
| JP2001323324A | 2001-11-22 | |||
| JP2000319730A | 2000-11-21 | |||
| JP2007105763A | 2007-04-26 |
Yoshinori Iwahara
Susumu Yamamoto
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