Grain size is small after intermediate annealing. Small and homogeneous grains are obtained after decarburizingannealing.
中间退火后晶粒细小，脱碳退火后晶粒细小均匀。
2
The subsurface oxide layers generated during decarburizingannealing of high grade non-oriented silicon steel sheet were studied by metallographical method and magnetoacoustic emission method(MAE).