GCr15 Bearing Steel Production at Shijiazhuang Iron and Steel Company
CAO Liguo1 ,2,LI Shiqi1,CHEN Ze1
1. Shool of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing 100083, China；2. Shijiazhuang Iron and Steel Co., Ltd., Shijiazhuang 050031, Hebei, China
Abstract：The GCr15 bearing steel is produced by 60 t BOFLFVDCC route at Shijiazhuang Iron and Steel Company. The key points of the practice are：close oxygen content control on BOF by catching carbon practice, control of the slag carry over during BOF tapping, using CaOSiO2Al2O3 slag with high basicity(R≥3.5) for LF refining,removal ot deoxidization products by effective argon blowing,with further removal during VD process under a vacuum less than 67 Pa and for 1020 minutes and a weak stirring for more than 4 minutes at the end of VD process,protective casting to prevent reoxidation. The average oxygen content of the final products was 9.5×10-6,with the lowest of 7×10-6. The production of GCr15 bearing steel at Shijiazhuang steel is on the domestic top level with such efficient, low cost route.
曹立国;李士琦;陈泽. 石钢GCr15轴承钢实践[J]. 钢铁, 2008, 43(6): 38-0.
CAO Liguo;LI Shiqi;CHEN Ze. GCr15 Bearing Steel Production at Shijiazhuang Iron and Steel Company. Iron and Steel, 2008, 43(6): 38-0.
2008, Vol. 43 
