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Effect of M-EMS Parameters on quality of 82B High Carbon Steel

Journal of Iron and Steel Research International 2012年第S2期19卷 929-932页

作者： ZHANG Jing WANG En-gang XU Xiu-jie HE Ji-cheng College of Vehicles and Energy Yanshan University Key Laboratory of Electromagnetic Processing of Materials Northeastern University

In this paper,the rule of M-EMS on Φ250mm 82B high carbon steel during the casting process was investigated by numerical simulation and *** influence of M-EMS current and frequency on distribution of flow field was *** simulation results show that:At the same current,velocity increases with the frequency *** the increase of frequency,the velocity first decreases and then increases as the frequency increase along the casting direction. At the same frequency,velocity increases with the current *** turbulence zone also become more strenuous, especially in free surface,the suitable turbulence is benefit to uniform steel *** results show that the quality defects of 82B high carbon steel can be significantly improved with *** zone of central pipe decreases. With the increase of current,equiaxed zone ratio *** the results of numerical simulation and experiments, the optimized EMS parameters of Φ250mm high carbon steel are the stirring current of 480A and the stirring frequency of 3Hz,which can improve strand quality greatly.

关键词： 82B electromagnetic stirring flow Field numerical simulation billet quality

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Secondary cooling technology for high-efficiency continuous billet-casting

引用

Journal of Chongqing University 2007年第4期6卷 242-248页

作者：陈登福 College of Materials Science and Engineering Chongqing University

The mathematical model of high-efficiency continuous billet casting was developed, incorporating the effective spraying water coefficient and the effective specific spraying water flowrate of secondary cooling. To realize uniform cooling in secondary cooling zones, the spraying cooling structure and the arrangement of nozzles were redesigned and optimized, and an additional spraying cooling zone was used. A new secondary cooling model of spraying water was built. It was found that the required spraying water flowrate of a cooling zone was related with the casting speed, the casting temperature, the compositions of liquid steel and the cooling water temperature of secondary cooling. The operation of the reformed caster proved that the spraying cooling structure and the new secondary cooling model were suitable, and the casting speed was greatly enhanced. The highest casting speed was （3.8 to 4.0） m/min for billet with a section of 150× 150 mm^2. The quality And the outout of the billet were imoroved, andthe economical benefit was heightened.

关键词： high-efficiency continuous casting water flowrate of secondary cooling secondary cooling model of sprayingwater billet quality

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