学术
摘 要:
试验研究了电磁搅拌的电流（150—500A）对重轨钢U75V等钢种（mm）280×380、280×325连铸坯冶金质量的影响。结果表明，当电流由250A提高至500A时，重轨钢U75V铸坯中心区等轴晶率由18．8％增至36．2％，夹杂总量由8．53mg／10kg降至4．68mg／10kg，中心疏松、偏析、缩孔、中心裂纹和中间裂纹等缺陷≤1．0级别的比例达98％。中碳钢连铸电磁搅拌电流为350—400A，低碳钢连铸电磁搅拌电流为250A时，铸坯内部缺陷≤1．0级的比例分别为93％和90％。[著者文摘]
文章出处:
《特殊钢》-2008年1期 -51-53页
栏目信息:
分 类 号:
Application of Mold Electromagnetic Stirring Technology for 280 mm × 380 mm Concasting Bloom
Chen Yong and Zhu Miaoyong （1 School of Materials and Metallurgy, Northeastern University, Shenyang 110004; 2 Dept of Materials Research, Panzhihua Iron and Steel Research Institute, Panzhihua 617000）
Abstract:
The effect of current （150 -500 A） of mold electromagnetic stirring （M-EMS） technology on metallurgy quality of 280 mm × 380 ram, 280 mm × 325 mm concasting bloom of heavy rail steel U75V etc grade has been tested and studied. Results showed that with the current increasing from 250 A to 500 A, the percentage of equiaxed zone increased from 18. 8% to 36. 2%, the total inclusion amount decreased from 8.53 mg/10kg to 4. 68 mg/10kg and the percentage of ratting units ≤ 1.0 of defects centre porosity, segregation, shrinkage cavity, centre cracks and midway cracks was up to 98%. As concasting stirring current was 350 - 400 A for medium carbon steels and concasting stirring current was 250 A for low carbon steels, the percentage of ratting units ≤ 1.0 of casting bloom internal defects was respectively up to 93 % and 90%.[著者文摘]
Key words:
Bloom, Concasting, M-EMS, Metallurgy Quality
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