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Real Heat Flux Analysis of Continuously Casting round billet

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Journal of Iron and Steel Research International 2008年第1期15卷 25-29页

作者： ZHAN Hui-ying WANG Xu-dong GUO Liang-liang YAO Man School of Material Science and Engineering Dalian University of Technology Dalian 116024 Liaoning China

The distributions of heat flux along the height and the circumferential direction of round billet mould were measured *** influence of casting speed,carbon content,powder,and pouring temperature on the average longitudinal and circumferential heat flux in the ＂high heat flux region＂ was *** experimental and analytical results provide a basis for an intelligent mould with online detection of defects,adjustment of operational parameters,optimization of the monitoring system,and even prediction of abnormal heat transfer.

关键词： continuous casting mould heat flux round billet

Simulation on Effect of Divergent Angle of Submerged Entry Nozzle on Flow and Temperature Fields in round billet Mold in Electromagnetic Swirling Continuous Casting Process

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Journal of Iron and Steel Research International 2014年第2期21卷 159-165页

作者： De-wei LI Zhi-jian SU Katsukiyo MARUKAWA Ji-cheng HE Key Laboratory of Electromagnetic Processing of Materials of Ministry of Education Northeastern University

A new process for swirling flow generation in the submerged entry nozzle （SEN） in continuous casting process of steel was proposed. A rotating electromagnetic field was set up around the SEN to induce swirling flow by Lorentz force. The flow and temperature fields in the SEN and round billet mold with electromagnetic swirling were numerically simulated and then verified by the electromagnetic swirling model experiment of low melting point alloy. The effects of divergent angle of the SEN on the flow and temperature fields in mold with electromagnetic swirling were investigated. The electromagnetic swirling flow generator （EMSFG） could effectively induce swirling flow of molten steel in the SEN, which consequently improved greatly the flow and temperature fields in the mold. Below the nozzle outlet in mold, with the increase of divergent angle, the stream of bulk flow diverged more widely, the high temperature zone shifted up, and the temperature field became more uniform. Above the nozzle outlet in mold, with 350 A electromagnetic swirling, when the divergent angle of the SEN increased, the upward flow velocity and the meniscus temperature first increased and then decreased. With a divergent angle of 60~, the upward flow velocity and meniscus temperature reaced the largest value.

关键词： continuous casting process swirling flow flow field divergent angle round billet

Suppression of Effect of Uneven Velocity in Submerged Entry Nozzle in round billet Continuous Casting Process Using Electromagnetic Swirling Flow

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Journal of Iron and Steel Research International 2012年第S2期19卷 905-908页

作者： LI De-wei SU Zhi-jian MARUKAWA Katsukiyo HE Ji-cheng Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern University Formerly Sumitomo Metal Industries Ltd.

Sliding gate control system is widely employed in continuous casting process of steel to control flow rate of molten *** molten steel passes through a sliding gate,uneven flow *** will cause asymmetrical distribution of flow and temperature field in mold consequently,formation of vortex near the nozzle and entrapment of CC powder into the molten ***,which have negative effect on process productivity and product *** suppress the uneven flow,electromagnetic swirling flow has been proposed to impose on the flow in submerged entry nozzle below the sliding *** this study the uneven flow developed by incompletely open sliding gate and the suppression of this uneven flow using electromagnetic swirling flow are numerically studied in round billet continuous casting of steel *** improvement of the flow and temperature filed in the submerged entry nozzle and mold are *** is found that:The uneven velocity in nozzle can be suppressed by electromagnetic swirling flow,and the flow and temperature field in mold be improved obviously;With the increase of electromagnetic swirling intensity,the effect of uneven flow can be almost completely suppressed.

关键词： continuous casting process sliding gate,uneven flow,electromagnetic swirling flow round billet

Mathematical model of solidification for round CC billets

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Journal of University of Science and Technology Beijing 2005年第5期12卷 400-405页

作者： Yonglin Li Pei Zhao Guoguang Cheng Shengtao Qiu Jianping Zhang Metallurgical and Ecological Engineering School University of Science and Technology Beijing Beijing 100083 China National Engineering and Research Center for Continuous Casting Technology Central Iron and Steel Research Institute Beijing 100081 China Technology Center Ma＇anshan Iron ＆ Steel Co. Ltd Ma＇anshan 243000 China

A coupled mathematical model was established to simulate the whole solidification process of round billet continuous casting for wheel steel using piecewise linear functions of heat flux density in the mold, the secondary cooling zone and the with- drawing-straightening zone. The calculated results were consistent with the measured data showing that the model accords with the practice. The surface temperature and the solidified shell thickness of round billets are more strongly influenced by casting speed than by casting temperature. The holding zones have effect on surface temperature, which is more obvious for the 450 mm round billet. The relation between casting temperature/speed and solidification end is expressed as a linear function. The solidification end is located after straightening machine.

关键词： round billet surface temperature solidified shell thickness solidification end

Investigation on Mechanical Property of Seamless Pipe

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Journal of Iron and Steel Research International 2004年第2期11卷 52-54页

作者： ZHAOLi-ming YANGXiao-yong LIUYe TianjinUniversity Tianjin300072China TianjinPolytechnicUniversity Tianjin300301China

The mechanical properties of the steel pipe rolled with continuously casting round billet after determining the chemical composition in steel were *** results show that the total reduction ratio should be higher than 5.2 when the line pipes of grade B,grade 20 and other general seamless pipe were rolled with continuously casting round *** the total reduction ratio should be higher than 10.2 and the grain size should be controlled more than grade 7 for casing of oil countryside tubular goods(OCTG).

关键词： seamless pipe mechanical property continuously cast round billet total reduction ratio rolling

In-Situ Austenite Steel Matrix Composite Reinforced by Granular γ+（Fe,Mn）3C Eutectic

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Journal of Iron and Steel Research International 2004年第2期11卷 46-51页

作者： LIANGGao-fei XUZhen-ming JIANGQi-chuan LIJian-guo ShanghaiJiaotongUniversity Shanghai200030China JilinUniversity，Changchun130025，China

The mechanical properties of the steel pipe rolled with continuously casting round billet after determining the chemical composition in steel were studied. The results show that the total reduction ratio should be higher than 5 2 when the line pipes of grade B, grade 20 and other general seamless pipe were rolled with continuously casting round billet. And the total reduction ratio should be higher than 10 2 and the grain size should be controlled more than grade 7 for casing of oil countryside tubular goods (OCTG).

关键词： seamless pipe mechanical property continuously cast round billet total reduction ratio rolling