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本试验对0.35和0.2mm厚的取向硅钢的二次再结晶温度进行了研究,试验结果表明:同一热轧板的取向硅钢,经过相同的工艺处理,最终冷轧成0.35和0.2mm两种厚度,它们的二次再结晶的开始温度和温度范围有相当大的差异。随着厚度的减薄,脱碳退火后试样中的高斯晶核数量要相应减少,二次再结晶开始温度提高,二次再结晶变得难以控制。为了获得完善的二次再结晶组织,要对钢的化学成份(包括钢中抑制相的含量)、热轧工艺等作相应的调整。
In this experiment, the secondary recrystallization temperatures of 0.35 and 0.2mm oriented silicon steel were studied. The experimental results show that the same hot-rolled silicon steel with the same hot-rolled sheet is cold-rolled to 0.35 and 0.2mm thickness , There is a considerable difference in the starting temperature and the temperature range of their secondary recrystallization. As the thickness decreases, the number of Gaussian nuclei in the sample after decarburization annealing decreases correspondingly, the temperature at the start of secondary recrystallization increases, and the secondary recrystallization becomes difficult to control. In order to obtain a perfect secondary recrystallized structure, the chemical composition of the steel (including the phase content in the steel), the hot rolling process and the like should be adjusted accordingly.