Preventing Occurrence of Transverse Corner Cracks on Nb, V and Ti Microalloying Steel CC Slabs

查看全文 作　　者：WANG Xinhua;WANG Wenjun;WU Dongmei;CHANG Bo;LIU Xinyu;ZHANG Li;YE Jinwei(Metallurgy Engineering School,USTB,Beijing 100083)(Baoshan Iron and Steel Co., Shanghai 200091) 出　　处：《International Journal of Minerals,Metallurgy and Materials》索引1997年第11卷第4期,共5页 摘　　要：Based on their hot ductilities, Nb, V and Ti microalloying steels can be classified into two groups. The first group includes steels with lower carbon content (≤0.10%). Ductilities of steels of this group recover and rise with decreasing temperature when temperature lowers to below 825℃. Another group includes steels which contain more carbon (>0.12%) or contain more Nb and V. The low ductility temperature Region Ⅲ for steels of mis group extends to temperature as low as 725℃. The occurrence of the transverse corner cracks of the Nb, V and Ti microalloying steel CC slabs has be considerably decreased by stabilizing casting speed, increasing mold steel level automatic control ratio,enhancing caster segment radial alignment and adopting proper secondary cooling patterns to make slab corner temperature at straightening out off the low ductility temperature region. 关 键 词：NB V Ti MICROALLOYING STEEL continuous casting SLAB hot DUCTILITY crack