In this paper,the causes of longitudinal concave defects on narrow surface of continuous casting billet were analyzed by means of macroscopic morphology analysis,low-power pickling analysis,metallographic analysis and chemical composition detection,and combined with the production technology of continuous casting billet.It is de-termined that the main cause of the defects is the uneven cooling of the primary billet shell caused by the unreasona-ble cooling water on the narrow side of the continuous casting mold,and the extrusion of the mold shell caused by the excessive taper.The surface quality of continuous casting slab was improved effectively by optimizing the cooling water quantity of mold,adjusting and controlling the taper of mold narrow surface and optimizing the performance of protective slag,and the longitudinal concave defect of narrow surface of continuous casting slab was prevented.
关键词
连铸坯/窄面凹陷/产生原因/分析及预防/板坯表面质量
Key words
continuous casting billet/narrow-face depression/cause/analysis and control/slab surface quality
维普
万方数据