热轧加热温度对3.0 %Si无取向硅钢组织及析出物的影响

研究了热轧加热温度对Si的质量分数3.0 %的无取向硅钢的热轧和常化组织及析出物的影响规律。结果表明：热轧组织沿厚度方向存在组织梯度、析出物呈球状和不规则形状分布在晶内；随着热轧加热温度的提高，中间层纤维状变形带宽度变窄；加热温度为1 150 ℃时，小于100 nm的AlN析出粒子数量增加。热轧板经900 ℃常化后，为完全再结晶铁素体组织，组织均匀性提高、析出物聚集和粗化；提高热轧板加热温度，常化组织的平均晶粒尺寸降低，大于100 nm的析出物和20~100 nm的 AlN、AlN+Ti复合析出相数目逐渐增多。

Effect of hot rolling heating temperature on microstructure and precipitates of 3.0 % Si non oriented silicon steel

The effect of hot rolling heating temperature on microstructure and precipitates of 3.0 % Si non oriented silicon steel was studied. The results showed that there was a structure gradient along the thickness direction of the hot rolling plate, and spherical and irregular precipitates were distributed in the grains. With the increase of the hot rolling heating temperature, the width of the fibrous deformation zone in the middle layer became narrow. When the temperature increased to 1 150 ℃, the number of AlN precipitates less than 100 nm increased. After normalizing at 900 ℃, the microstructure of the hot rolled plate was completely recrystallized, and the homogeneity of the microstructure was improved, the precipitates were aggregated and coarsened. With the increase of the hot rolling heating temperature, the average grain size of the normalized hot rolled plate decreased, and the number of precipitates more than 100 nm increased, in addition, the number of AlN, AlN + Ti composite precipitates in the range of 20-100 nm increased gradually.