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针对高品质大规格低碳高硫高磷钢(简称GY15)的特点,炼钢采用转炉低碱度保硫保磷、精炼低碱度弱搅拌、连铸低拉速弱冷却等工艺,轧钢采用延长加热时间、提高开轧温度、降低轧制速度以及轧材快速下线等工艺。实践结果表明,GY15的生产工艺设计是合理的,成分控制稳定,浇注过程中未发生漏钢事故,铸坯表面质量和内部质量良好;轧制过程中未出现轧件“开裂”或“打滑”现象,轧材内部组织均匀且无带状组织,轧材力学性能和硬度均满足客户要求。
According to the characteristics of high-quality large-scale low-carbon, high-sulfur and high-phosphorus steel (referred to as GY15), the steelmaking process adopts the process of low alkalinity phosphoric acid concentration, weak weakness of refined low alkalinity, Extend the heating time, improve the open rolling temperature, reduce the rolling speed and rapid rolling off the assembly line and other processes. The practice results show that the design of production process of GY15 is reasonable, the composition control is stable, there is no steel leakage accident in casting process, the surface quality and internal quality of cast slab are good; there is no “cracking” or “ ”Slipping " phenomenon, the rolling material within the organization and no band organization, rolling mechanical properties and hardness meet customer requirements.