Method for improving center segregation and surface crack of continuous casting medium thick slab of peritectic steel

A method for improving center segregation and surface crack of a continuously casted medium-thickness peritectic steel slab, comprising:

• 1) cooling a wide face of a mould with a cooling water at 3400-3600 L/min, and a narrow face of the mould with the cooling water at 480-530 L/min;
• 2) cooling a wide face of a foot roller section with the cooling water at 239-298 L/min, and a narrow face of the foot roller section with the cooling water at 61-65 L/min;
• and
• 3) cooling a sector segment having a first to a fourteenth sections with the cooling water at 1517-2166 L/min, wherein a total cooling water amount used to cool the first section to the fourth section is 840-1101 L/min, and a total cooling water amount used to cool the fifth section to the eighth section is 633-1001 L/min,
• wherein an amount of the cooling water sprayed to a lower part of the first section is 241-318 L/min, an amount of the cooling water sprayed to an inner arc of the second section is 84-110 L/min, an amount of the cooling water sprayed to an outer arc of the second section is 95-126 L/min, an amount of the cooling water sprayed to an inner arc of the third section to the fourth section is 75-93 L/min, and an amount of the cooling water sprayed to an outer arc of the third section to the fourth section is 99-125 L/min,
• wherein an amount of the cooling water sprayed to an inner arc of the fifth section to the sixth section is 140-189 L/min, an amount of the cooling water sprayed to an outer arc of the fifth section to the sixth section is 223-302 L/min, an amount of the cooling water sprayed to an inner arc of the seventh section to the eighth section is 97-184 L/min, and an amount of the cooling water sprayed to an outer arc of the seventh section to the eighth section is 173-326 L/min, and wherein an amount of water sprayed to an inner arc of the ninth section to the fourteenth section of the sector segment is 44-64 L/min, and no water is sprayed to an outer arc of the ninth section to the fourteenth section.