To provide a continuous casting method which can obtain a high-quality cast slab by preventing the bubble defect of a wear-resistant steel containing Ti.
The continuous casting method of wear-resistant steel is characterized as follows. The wear-resistant steel has a composition including 0.05-0.35 mass% of C, 0.05-1.0 mass% of Si, 0.1-2.0 mass% of Mn, 0.0003-0.0030 mass% of B, 0.1-1.0 mass% of Ti, 0.002-0.1 mass% of Al, 0.1-1.0 mass% of Cr, 0.05-1.0 mass% of Mo, 0.05-1.0 mass% of W, and a remainder consisting of Fe and inevitable impurities, the width the cast slab is 1,300-1,900 mm, a casting speed is 0.50-1.00 m/second, in addition, the flow rate MAR of an Ar gas flow and the flow rate MN2 of an N2 gas flow blown into an immersion nozzle are respectively MAR: 2.0-14.4 NL/second and MN2: 0.5-10.8 NL/second, and the continuous casting is performed in the range that the flow rate MAR of the Ar gas flow and the flow rate MN2 of the N2 gas flow satisfy 2.6≤MAR+1.2×MN2≤15.0.
MUROTA YASUHIRO
TSUTSUMI KOICHI
SUGA TAKUYA
Suzuki Yoko