动态轻压下对重轨钢U75V疏松和夹杂物的影响  

Effect of Dynamic Soft Reduction in Casting on Porosity and Inclusions in Heavy Rail of Steel U75V

作　　者：李峰[1] 刘平[1] 董珍[1] 史凤武[1] 白月琴[1] 张家泉[2] 

机构地区：[1]包头钢铁集团公司技术中心,包头014010 [2]北京科技大学冶金学院,北京100083

出　　处：《特殊钢》2009年第4期57-58,共2页Special Steel

摘　　要：6流280mm×380mm连铸机每流安装6架轻压下机。铸坯轻压下量≤8mm,压下率≤1.5mm/m。结果表明,在合理的工艺条件下,通过轻压下可显著改善铸坯中心疏松,从而改善U75V钢重轨的轨腰中心条纹。因改善夹杂物在铸坯内的分布,探伤次品剔出率由0.206%降至0.095%。6 Soft reduction stands are installed at each strand of 6 strands caster for 280 mm × 380 mm bloom. The soft reduction in height of bloom is ≤ 8 mm with reduction rate ≤ 1.5 mm/m. Results showed that with suitable process conditions and using dynamic soft reduction technology, the center porosity of bloom was improved led to obviously improve the center stripe at waist of heavy rail of steel U75V, and the rejection rate by non-destructive testing decreased from 0. 206% to 0. 095% due to improvement of distribution of inclusions in bloom.

关 键 词：大方坯连铸 重轨钢 动态轻压下 疏松 夹杂物 

分 类 号：TF777.2[冶金工程—钢铁冶金]