Abstract
Due to its high silicon content, Fe-6.5wt%Si alloy has low iron loss and its magnetostriction is almost zero. And therefore Fe-6.5wt%Si alloy has good development prospect. However it has poor ambient temperature ductility and its cold rolling is very difficult. It’s important to study the effect of cooling rate on the microstructure and mechanical properties of Fe-6.5wt%Si alloy. In the present study the master alloy was melted and cooled through normalization, gas atomization, laser surface remelting and melt spinning. The microstructure, micro-hardness and X-ray diffraction were analyzed. The evolution of the microstructure at different cooling rate was summarized. The results indicated that under high cooling rate, the grain was obviously refined, and the microhardness decreased, but the change of phase was not obvious.
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