酸溶铝含量对取向硅钢常化抑制剂析出的影响

Effect of acid-soluble aluminum content on precipitates of normalizing grain-oriented silicon steel

以工业0.27 mm规格高磁感取向硅钢为研究对象,研究了酸溶铝(Al_(s))含量对常化板析出物析出行为的影响。结果表明:常化板中的析出物主要是AlN与MnS和AlN的复合析出物,随着Al_(s)含量的升高,析出物数量增加,但析出物平均尺寸变化不大。常化板中粗大的析出物大多是复合析出物,且多是以MnS为核心,AlN在MnS表面析出,而常化板中细小的析出物多为单一的析出物。常化冷却阶段,由于过饱和的Al和N在珠光体区域附近更多地析出,常化板珠光体区域附近存在较多细小的AlN粒子。

The effect of acid-soluble aluminum(Al_(s))content on precipitation behavior of the precipitates from the normalized plate was investigated in high magnetic induction grain-oriented silicon steel.The results showed that the precipitates mainly consist of AlN,MnS and compound precipitates of AlN.With the increase of Al_(s) content,the amount of precipitates increases,but the average size of precipitates does not change much.The coarse precipitates in the normalized plate are basically compound precipitates,most of which take MnS as the core and AlN is extrapolated on the surface of MnS,while the fine precipitates in the normalized plate are mostly single precipitates.In the normalizing cooling stage,there are many fine AlN particles near the pearlite region because of the precipitation of supersaturated AlN and N near the pearlite region of normalizing plate.