600×300规格H型钢改坯型轧制的实践与应用

APPLICATION OF H-BEAM ROLLING TECHNOLOGY ON CHANGING BEAM BLANK IN H600x300 SPECIFICATION

针对莱钢大型H型钢生产线在采用BB2坯型生产H600×300规格H型钢“舌头”较长的问题，进行了改坯型轧制，将原料坯型由BB2改为BBI，采用小坯型轧制技术，通过重新修改粗轧机的孔型系统及压下规程，进行扩腰轧制，减少了轧制缺陷，产能及成材率指标都得到了大幅提升。

In Laiwu Steel＇ s heavy H-beam product line,considering the problem of H-beam＇ s long ＂tong＂ on producing H600× 300 section H-beam by BB2 beam blank,changing the type of beam blank,BB2 beam blank instead of BB1 beam blank,using smaller beam blank on rolling techology,modifying the rough mill＇ s pass system and reduction specifition,using enlarging rolling technology, Avoiding the rolling defect, productivity and ratio of product were greatly improved.