Grain size is small after intermediate annealing. Small and homogeneous grains are obtained after decarburizing annealing.

中间退火后晶粒细小，脱碳退火后晶粒细小均匀。

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The subsurface oxide layers generated during decarburizing annealing of high grade non-oriented silicon steel sheet were studied by metallographical method and magnetoacoustic emission method(MAE).

通过金相法和磁声发射法（MAE）研究了高牌号无取向硅钢脱碳退火时所产生的内氧化层。

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