高铝双相钢W780QX板坯表面纵裂研究  

STUDY ON SURFACE LONGITUDINAL CRACK OF W780QX SLAB

作　　者：王肖杰 Wang Xiaojie(Technical and Quality Department of HBIS Group Tangshan Stainless Steel Company,Tangshan,Hebei,063100)

机构地区：[1]河钢集团唐钢不锈钢有限责任公司技术质量科,河北唐山063100

出　　处：《河北冶金》2020年第4期49-52,共4页Hebei Metallurgy

摘　　要：针对河钢唐钢不锈钢公司高铝双相钢W780QX板坯纵裂问题,从生产工艺入手,分析了钢水过热度、保护渣成分及水口浸入深度对板坯纵裂纹的影响。通过改变连铸开浇方式,开发低碱度、低熔点、低粘度的高铝双相钢专用保护渣,调整结晶器锥度及定置水口插入深度为140 mm,W780QX钢的表面质量得到有效改善,再未出现纵裂问题。In view of the longitudinal crack of W780QX slab of high aluminum dual phase steel in Tangshan Stainless Steel Co.,Ltd.,this paper analyzes the influence of superheat of molten steel,composition of protective slag and immersion depth of nozzle on the longitudinal crack of slab.By changing the casting mode of continuous casting,developing the special slag for high aluminum dual phase steel with low basicity,low melting point and low viscosity,adjusting the mould taper and the insertion depth of fixed nozzle to 140 mm,the surface quality of W780QX steel was effectively improved without any longitudinal crack.

关 键 词：高铝双相钢 W780QX 纵裂 保护渣 过热度 浸入式水口 锥度 

分 类 号：TF777[冶金工程—钢铁冶金]