Abstract：Many quality problems are occurred in the process of the 300 mm thickness slab production at No.5 continuous caster of Jigang. The casting defects include transverse crack at outer arc corner and surface longitudinal crack， middle crack. Field practice shows that the main reason for the transverse crack at outer arc corner is that the slab is too strong to be cooled before bending. By the nozzle modification and the cooling intensity adjustment， the transverse cracks at outer arc corner are eliminated. The surface longitudinal cracks are basically eliminated by optimization of the submerged nozzle size and adjustment of the protective slag property. The middle cracks are eliminated by optimization soft reduction process and elimination mechanical clearance. Good surface quality and internal quality are obtained after process optimization.
曹运涛. 济钢300 mm厚板坯连铸机的工艺优化[J]. 中国钢铁期刊网, 2016, 35(3): 28-30.
CAO Yun-tao. Process optimization of 300 mm thick slab continuous casting machine at Jigang. Chinese Journal of Iron and Steel, 2016, 35(3): 28-30.
2016, Vol. 35 
