2020 Volume 60 Issue 11 Pages 2541-2548
The role of inclusion, microstructure and texture evolution in soft magnetic properties of Fe–6.9 wt%Si alloy with yttrium doping was studied. The results demonstrated that rare earth Y played a crucial role in the soft magnetic properties of Fe–6.9 wt%Si alloy. Adding Y suppressed the nucleation of {110} orientation grains at {111} in-grain shear bands during warm rolling, and refined the grain size after annealing. Meanwhile, the average size and number of inclusions showed a similarly decreasing trend because of Y doping, and the maximum interface energy between fine Y-inclusions and {100} grains possibly induced the grain growth of {100} grains. In the measurement of magnetic properties, B8 value increased from 1.295 T to 1.493 T, and P10/1000 value was reduced from 19.165 W/kg to 17.328 W/kg due to Y doping.