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电磁搅拌和数值模拟在SiC/C19400复合材料制备中的研究 被引量:1

Research of Electromagnetic Stirring and Numerical Simulation to Preparation of SiC/C19400 Composites
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摘要 采用数值模拟及实验的方式研究不同频率电磁场对SiC/C19400复合材料铸造组织及性能的影响。通过模拟计算磁场强度及洛伦兹力的变化显示,通电线圈围合的空间内产生了磁场,越靠近边缘处磁场强度越大,并呈现向中心线性下降趋势,中心磁场强度为0。以熔体横截面为计算对象,在电流不变(30 A)的情况下,频率10 Hz时,熔体边缘磁场强度最大,达到71.7 mT,洛伦兹力也表现为同样的情况。同时进行的实验研究表明,频率10 Hz时材料的组织最细小,平均粒径为42.9μm时硬度值最大为77 HB,与模拟趋势基本一致。 Numerical simulation and experimental methods are used to study the influence of electromagnetic fields of different frequencies on the casting structure and properties of SiC/C19400 composites.The simulation calculation of the magnetic field strength and the changes in the Lorentz force show that the magnetic field is generated in the space enclosed by the energized coil.The closer to the edge,the greater the magnetic field strength,and a linear downward trend toward the center,with the central magnetic field strength being zero.Taking the cross-section of the melt as the calculation object,when the current is constant(30 A),the fringe magnetic field strength of the melt is the largest at a frequency of 10 Hz,reaching 71.7 mT,and the Lorentz force also exhibits the same situation.The experimental research carried out at the same time shows that the material has the smallest structure at a frequency of 10 Hz,with an average particle size of 42.9μm and the largest hardness value of 77 HB,which is basically consistent with the simulation trend.
作者 廖钰敏 杨成海 冯晓杰 胡蓉 LIAO Yumin;YANG Chenghai;FENG Xiaojie;HU Rong(Guangdong Songshan Polytechnic College,Shaoguan 512126,China)
出处 《机械工程师》 2021年第8期53-56,共4页 Mechanical Engineer
基金 广东省教育厅重点平台及科研项目(2017GkQNCX034)。
关键词 复合材料 SiC/C19400 数值模拟 电磁搅拌 composite materials SiC/C19400 numerical simulation electromagnetic stirring
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