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对莱钢特钢厂连铸生产的大方坯轴承钢中心偏析的成因进行分析,研究了中间包钢水过热度等因素对中心偏析的影响,并对莱钢特钢厂的生产实践提出了预防措施。改善连铸轴承钢的中心偏析的方法和途径有:降低和稳定过热度,合理选择拉速、二冷强度和电磁搅拌参数等。
The causes of the segregation of the plain bearing steel center produced by continuous casting in Laiwu Steel Special Steel Factory were analyzed. The influence of the overheating degree of the molten steel in the tundish on the center segregation was studied. The prevention practice was also put forward for the production practice of the special steel plant in Laiwu Steel. Measures. Methods and ways to improve the center segregation of continuous casting bearing steel are as follows: reducing and stabilizing the degree of superheat, reasonably selecting the pulling speed, secondary cooling strength and electromagnetic stirring parameters.