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Experimental Determination and Thermodynamic Calculation of Phase Equilibria in Fe-based Alloys of some grain oriented silicon steel Systems

Abstract

取向硅钢具有优异的软磁性能,饱和磁化强度高,电阻率较高,矫顽力低和铁损小,广泛用于制造软磁材料,在电力工业和电讯工业领域得到了广泛的应用。相图是材料设计的重要理论基础,在金属材料成分设计中有重要应用,因此,有必要掌握取向硅钢的相图和热力学信息。本论文通过实验测定和热力学计算两种途径,对取向硅钢部分铁基相平衡进行了实验测定和热力学计算,主要研究工作如下: (1)首次实验测定了Fe-Nb-Ti三元系在1000℃、1100℃和1200℃时全成分范围的等温截面相图。重新优化计算了Fe-Ti二元系相图,基于Fe-Nb和Nb-Ti两个子二元系的优化结果,利用CALPHAD技术,在本研究的实验结果基础上,...The oriented silicon steel are widely used as soft magnetic materials in the filed of electric power and telecommunication industry due to their good soft magnetism, high saturation manetization and resistivity, small coercive force and iron loss. Phase diagram has been recognized as an important tool in the design of metal materials. Thus, it is necessary to know information of the phase diagram ...学位:工学硕士院系专业:材料学院材料科学与工程系_材料物理与化学学号:2072008115059

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