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以首钢水城钢铁典型钢种的连铸凝固传热过程为研究对象,应用Procast软件对HRB400,150方坯连铸的凝固传热过程进行数值模拟,研究钢水过热度对铸坯液芯长度和铸坯凝固质量的影响。研究表明:过热度每增加10℃,液芯长度延长0.404 m。随着过热度的增加,拉矫区高温区域不断增大,铸坯表面裂纹减少,但中心疏松和偏析增加;HRB400钢液浇注温度应控制在1 552℃以下,既可以保证铸坯内部质量又可以减少表面裂纹的发生。
Taking the solidification and heat transfer process of the typical steel grade of Shougang Shuicheng Steel as the research object, Procast software was used to simulate the solidification and heat transfer process of the HRB400 and 150 billet continuous casting. The influence of molten steel superheat on casting liquid core length and casting Billet solidification quality impact. The results show that the length of wick extends 0.404 m for every 10 ℃ increase of superheat. With the increase of superheat, the high temperature zone of straightening zone continues to increase, the surface cracks of slab decrease, but the center is loose and segregation increases; HRB400 molten steel pouring temperature should be controlled below 1 552 ℃, both to ensure the internal quality of slab Can reduce the occurrence of surface cracks.