Rapid heating effects on grain-size, texture and magnetic properties of 3% Si non-oriented electrical steel

Bulletin of Materials Science

关键词: Non-oriented electrical steel;    rapid heating;    recrystallized grain-size;    recrystallization texture;    orientation distribution function (ODF);    magnetic properties.;   

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The rapid heating effects on the microstructure, texture and magnetic properties of 3% Si nonoriented electrical steel has been investigated through optical microscopy, X-ray diffraction and Epstein frame. The results show that recrystallized grains were refined with increased heating rate, caused by the nucleation rate increase, which is faster than the growth rate due to rapid hearting. With the heating rate increase, the characteristic {111} recrystallization fibre of cold-rolled steel was depressed, but the beneficial $\langle$001$\rangle$//RD and $\langle$001$\rangle$//ND fibres were significantly strengthened. Although the grain-size decreases with heating rate increasing, the optimal magnetic properties can also be obtained through the recrystallized grain-size and texture optimization by rapid heating. In this research, we find the magnetic properties optimization can be obtained when annealed with 100°C/s heating rate: the core loss ($P_{1.5/50}$) decrease 13% and the magnetic induction ($B_{50}$) increase 3%.

【 授权许可】

CC BY