摘要
研制开发的大方坯连铸结晶器空芯铜管电磁搅拌器绝缘、绝热性能良好,未通水时,线圈对地绝缘电阻达690MΩ,通水时绝缘电阻达3.4MΩ,连铸过程中电搅线圈散热量为136.4kW,电流强度I为500A时电磁搅拌器中心磁场强度达到536×10-4T。生产应用表明,利用该电磁搅拌器所浇重轨钢铸坯皮下气泡和皮下夹杂不大于0.5级,铸坯中心疏松不大于1.0级,且中心疏松0.5级的比例高达98.98%,铸坯成分均匀,中心碳偏析指数不大于1.05,为提高铸坯质量提供了重要保障。
The hollow core copper pipe mold electromagnetic stirrer （M-EMS） for continuous bloom casting developed by Chengdu Oriental Leishen Standard Electric Implement Ltd. is of superior performance in both insulation and heat insulation. The insulation resistances of M-EMS coil are 3.4 MΩ and 690 MΩ with and without cooling water flow over respectively. When the heat dissipation between M-EMS coil and cooling water comes to 136.4 kW and the current to 500 A the magnetic flux density of M-EMS rises to 536×10 ^-4 T. Production practice shows that subsurface blow-hole and subsurface inclusion of rail bloom produced by application of the M-EMS are ≤0. 5, central porosity 41.0 and moreover of all rail blooms produced those with ≤0. 5 central porosity takes up 98.98%, and central segregation index of carbon is ≤ 1.05. The results achieved in the research have laid an important foundation for further improvement in the rail bloom Quality.
出处
《炼钢》
CAS
北大核心
2007年第6期40-42,57,共4页
Steelmaking
关键词
大方坯连铸
空芯铜管
结晶器电磁搅拌
continuous bloom casting
hollow core copper pipe
mold electromagneticstirrer
