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众所周知,在钢锭轧成钢坯的过程中,由于心部和边部的变形不同,造成了钢坯端部中间的延伸小于两边的延伸,形成了鱼尾或尾孔。鱼尾或尾孔的发展愈严重,切除的就愈多,金属的收得率就越低,即成坯率越低。根据鱼尾或尾孔形成的原因,把平底钢锭设计成凸底钢锭,以减少轧制过程中心部与边部的延伸差,将能有效地消除鱼尾和尾孔,减少钢坯尾部的切损,提高钢锭的成坯率。武钢一炼钢厂上注工艺原用平型底板和上小下大的F8.2钢锭模匹配,铸出的平底钢锭的实际切尾率约3%;1986年改用凹
It is well known that in the process of ingot rolling into steel billet, the deformation of the heart and the edge is different, resulting in the extension of the middle of the billet less than the two sides extending to form the tail or the tail hole. The more serious the development of fish tail or tail hole, the more resection, the lower the metal yield, the lower the billet percentage. According to the formation of tail or tail hole, the flat bottom ingot is designed as a convex bottom ingot to reduce the elongation difference between the center part and the edge part during the rolling process, which can effectively eliminate the tail and the tail hole and reduce the tail loss of the billet , Improve ingot ingot billet rate. WISCO a steel mill on the betting process with the original flat bottom plate and the small big F8.2 ingot mold match, the casting of flat bottom ingot actual tailing rate of about 3%; 1986 concave