Q355C厚规格热轧带钢边部裂纹成因与控制

CAUSES AND CONTROL OF EDGE CRACKS IN THICK-GAUGE Q355C HOT-ROLLED STRIP STEEL

为了解决炼钢厂厚规格Q355C热轧卷板在生产过程中出现的上、下表面双侧边部大量无规律裂纹问题,从钢水成分调控、设备精度校准以及冷却过程控制等多个关键环节着手,深入分析了造成边部裂纹的潜在因素。基于这些分析,提出了一系列针对性的工艺优化措施,旨在全面提升钢材的品质和生产的效率。通过这些改进,期望实现减少热送板坯边部裂纹发生、提高成材率的目标,进而确保最终产品的可靠性与经济效益。

To address the issue of numerous irregular cracks occurring on both the upper and lower surfaces at the edges of the thick-gauge Q355C hot-rolled coil sheets during production,this paper delves into potential factors causing edge cracks by focusing on several key aspects such as adjustment of molten steel composition,precision calibration of equipment,and control of the cooling process.Based on these analyses,we have proposed a series of targeted process optimization measures aimed at comprehensively enhancing the quality of the steel and the efficiency of production.Through these improvements,we hope to achieve the goals of reducing the occurrence of edge cracks in hot-delivered slabs and increasing the yield rate,thereby ensuring the reliability and economic benefits of the final product.