Method for effectively controlling surface crack on continuous casting extra thick slab

• Main Authors: BAI ZHANLU, WANG YULONG, ZHU ZHIYUAN, GUAN CHUNYANG, LI JINGGUANG, WEI YAOHUAN, WANG WENJUN, LIU YANG, SUN SHUOMENG, WANG HAORAN, ZHEN XINGANG, WANG ZHENMING
• Format: Patent
• Language: Chinese; English
• Published: 03.10.2012
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING

The invention discloses a method for effectively controlling surface crack on continuous casting extra thick slab, and belongs to the technical field of steel making-continuous casting. The extra thick slab is produced by a straight arc-shaped slab continuous casting machine; air pressure and water pressure of a secondary cooling jet are 0-0.2MPa and 0.2-2.0MPa respectively; the air pressure and the water pressure of the cooling jet at the vertical section are 0.3-0.6MPa and 0.3-0.8MPa respectively; the air pressure and the water pressure of the cooling jet at the curved section are 0.2-0.5MPa and 0.25-0.75MPa respectively; the air pressure and the water pressure of the cooling jets at the arc-shaped section and the straightened section are 0.15-0.45MPa and 0.2-0.7MPa respectively; and the air pressure and the water pressure of the cooling jet at the horizontal section are 0.1-0.35MPa and 0.1-0.6MPa respectively. The method disclosed by the invention has the advantages that the cooling efficiency is improved