冷轧取向硅钢二次再结晶过程的能量分析

AN ENERGY ANALYSIS OF SECONDARY RECRYSTALLIZA-TION IN GRAIN-ORIENTED 3%Si STEEL

冷轧取向硅钢片高温加热时,二次晶粒形核于极表面附近的区域,核的长大方式与冷轧形变率有关。本文按二次冷轧工艺、H1-B(一次冷轧)工艺下二次晶核的长大特点,分别采用能量分析方法导出了各种组织参量,如:初次晶粒半径、夹杂因子及二次晶核临界尺寸间的定量关系。计算结果与文献实验数据符合。

During final annealing of the grain-oriented 3%Si steel sheet, the secondary nuclei form in the subsurface layer of the sheet, but their growth modes depend on cold-rolling reduction. According to the growth characters of conventional and high permeability grain-oriented silicon steels, a quantitative relationship among the parameters, such as the diameter of primary grains, inclusion factor and critical size of secondary nuclei, is derived by the energy analysis. The calculated result is consistent with experimental data of previous works.