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Fe-6.5Si高硅钢是一种具有高磁导率、低矫顽力和低铁损等优异性能的软磁材料。但有序相B2和DO3,尤其是DO3相的出现会使高硅钢的硬度和脆性急剧升高,并对薄板的轧制加工产生非常不利的影响。由于该合金中同时存在A2、B2和DO3三相,且X射线衍射峰大量重叠,给DO3相的定量分析带来困难。采用直接比较法定量分析DO3相的体积分数,结果表明,h+k+l为偶数时A2与B2相{hkl}晶面衍射的结构因子相同。若将A2与B2合并成一相处理,适当调整X射线衍射直接比较法的关系式,进而对DO3相的特征衍射峰与三相重叠的衍射峰进行直接比较,即可计算出DO3相的体积分数。
Fe-6.5Si high-silicon steel is a soft magnetic material with excellent properties of high permeability, low coercivity and low iron loss. However, the appearance of ordered phases B2 and DO3, especially DO3 phase, causes the hardness and brittleness of high silicon steel to increase sharply, and has a very adverse effect on the rolling process of the sheet metal. Due to the simultaneous presence of A2, B2 and DO3 phases in the alloy and the large number of X-ray diffraction peaks overlapped, it is difficult to quantitatively analyze the DO3 phase. The direct comparison method was used to quantitatively analyze the volume fraction of DO3 phase. The results showed that the structural factors of A2 and B2 phase {hkl} diffraction were the same when h + k + 1 was even. If A2 and B2 are combined into one phase, the relationship between the direct comparison method of X-ray diffraction and the direct comparison method is adjusted appropriately to directly compare the characteristic diffraction peak of DO3 with the diffraction peak of three-phase overlap to calculate the volume fraction of DO3 phase .