摘要
裂纹是板坯连铸生产过程中常见的缺陷,制定合理的二冷工艺是减少铸坯裂纹的重要措施。以JBS275-B钢为对象,研究了板坯连铸二冷的工艺优化。基于凝固传热学基本理论,建立了二维板坯瞬态传热数学模型;根据高温塑性实验曲线,结合二冷区冶金原则,确定二冷区各段终点的表面目标温度;根据制定的铸坯表面目标温度,优化了二冷工艺,最终达到消除铸坯裂纹的目的。
The crack is a common defect in continuous casting slab. The formulation of the reasonable secondary cooling process is an important measure to reduce the slab crack. Taking JBS275-B steel as an object, the secondary cooling process optimization for slab continuous casting was researched. A mathematical model of transient heat transfer for 2D slab was established based on the basic theory of solidification and heat transfer. Combining with the metallurgical principles in the secondary cooling zone, the aimed temperature of each end point on slab surface in the secondary cooling zone was determined according to the experimental curves of the high temperature plasticity. According to the formulation of aimed temperature on slab surface, the secondary cooling process was optimized. Finally, the slab cracks are eliminated.
出处
《热加工工艺》
CSCD
北大核心
2014年第21期91-94,100,共5页
Hot Working Technology
关键词
板坯连铸
瞬态传热
数学模型
二冷优化
continuous casting slab
transient heat transfer
mathematical model
secondary cooling optimization
