Method for controlling edge subcutaneous longitudinal cracks of wide and thick plate 45 steel chamfering plate blank

• Main Authors: PAN SHISONG, LIANG FENG, ZHOU WEI, HE YUMING, LIU YU, HE WEIXIANG, HU QIAOQI
• Format: Patent
• Language: Chinese; English
• Published: 23.12.2022
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING

The invention belongs to the field of steelmaking continuous casting in the metallurgical industry, and relates to a wide and thick plate 45 steel chamfering plate blank edge subcutaneous longitudinal crack control method, which comprises the following steps: calculating a pulling speed according to an actual superheat degree, a wide surface maximum water volume and a narrow surface maximum water volume, obtaining Q1 and Q2 according to the pulling speed, further calculating a narrow surface actual flow and a wide surface actual water volume, and finally inputting into a casting machine control system. Quantitative comprehensive control is conducted by combining the pulling speed, the superheat degree of molten steel, the cooling water amount and the maximum water amount, and the method has the advantages of being easy to operate and easy to achieve. 本发明属于冶金行业炼钢连铸领域，涉及一种宽厚板45钢倒角板坯边部皮下纵裂纹的控制方法，根据实际过热度，宽面最大水量，窄面最大水量求出拉速，根据拉速得到Q1、Q2，进而计算出窄面实际流量、宽面实际水量，最终输入铸机控制系统，结合拉速、钢水过热度、冷却水量与最大水量进行定量的综合控制，具有操作简单、易实现的特点。