GCr15轴承钢大方坯连铸生产中动态轻压下工艺的应用  

Application of Dynamic Soft Reduction Technology in Process of Concasting Bloom of Bearing Steel GCr15

作　　者：田新中[1,2] 朱荣[1] 祭程[3] 朱苗勇[3] 李智峥[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]邢台钢铁有限责任公司,邢台054027 [3]东北大学材料与冶金学院,沈阳110004

出　　处：《特殊钢》2010年第6期26-27,共2页Special Steel

摘　　要：介绍了动态轻压下技术(轻压下区域铸坯固相率40%～96%,总压下量8.3～12.5mm)在邢台钢铁公司285 mm×325 mm连铸机生产GCr15轴承钢连铸坯的应用。结果表明,当钢水过热度20～30℃,拉速0.65～0.75m/min,实施动态轻压下后,中心疏松评级≤1.5级和中心缩孔0～1.5级的比例分别由未压下的49.45%和63.74%增加到了85.0%和87.5%;碳偏析值范围由未压下的0.875～1.390变为0.872～1.086;中心偏析和V型偏析明显改善。The application of dynamic soft reduction technology （ solid-phase ratio of bloom in soft reduction region- 40% -96% , total reduction- 8.3 - 12. 5 mm） in process of production for 285 mm ×325 mm bloom of bearing steel GCrl5 at Xingtai Steel is presented. Results show that with molten steel superheating 20 - 30 ℃, casting speed 0. 65 - 0. 75 m/min, after implementing dynamic soft reduction the percentage of rating ≤ 1.5 for center porosity and rating 0 - 1.5 for center line shrinkage increase respectively from original without implementing soft reduction 49. 45% and 63.74% to 85.0% and 87. 5% , the carbon segregation index decreases from 0. 875 - 1. 390 to 0. 872 - 1. 086, and the center segregation and V-shape segregation improve obviously.

关 键 词：动态轻压下 轴承钢 中心偏析 中心疏松 

分 类 号：TF777[冶金工程—钢铁冶金]