Abstract: By analysis on the breakage of the high-carbon steel stranded wire SWRH82B wire pen tip, it is obtained that there is a serious carbon segregation, the center net carbide rating of pen tip fracture ≥4;and the difference in the structural transformation leads to the uneven deformation in drawing to form breaking defects. By studying the mechanism of carbon segregation in the center of 180 mm x 180 mm high carbon steel SWRH82B billet, adjusting the superheat of molten steel from 15 -40 ℃ to 20 ~30℃, decreasing casting speed from 1. 5 m/min to 1. 4 m/min, the electromagnetic stirring at the end increasing from 350 A to 400 A, the carbon segregation index of the billet decreases from 1.18 to 1.06, which significantly reduces the occurrence of SWRH82B wire pen tip fracture rate.

摘要： 通过对高碳钢绞线SWRH82B拉丝材笔尖断裂的分析,得出笔尖状断口的中心网状碳化物级别≥4,存在较严重的碳偏析,组织转变上的差异导致拉拔变形不均匀产生断裂缺陷。通过对180 mm×180 mm断面高碳钢SWRH82B方坯中心碳偏析产生机理的研究,将钢水过热度从15～40℃调整为20～30℃、拉速由1.5 m/min降至1.4 m/min、末端电磁搅拌由电流350A增加至400A,钢坯的碳偏析指数由1.18降至1.06,明显降低了SWRH82B钢的拉丝材笔尖状断口发生率。