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研究了铝和铬元素在无取向电工钢晶粒长大过程中对织构及晶界变化的影响规律。试验结果表明:电工钢在晶粒长大过程中的主要织构组分均为{111}<112>。在晶粒生长期间,不加铝的1号试样中,{111}<112>、{111}<110>织构组分强化,而{100}<001>织构组分弱化;与1号试样相比,在加入0.2%的铝(质量分数,下同)的2号试样中,{111}<112>、{111}<110>织构组分强化(增加)的速率下降,{100}<001>织构组分变化不明显,甚至稍有增加。在含铝的试样中再加入0.3 5%的铬之后(3号试样),{111}<112>{、111}<110>和{100}<001>织构组分的变化规律与1号试样相似,但当电工钢中加入0.72%的铬之后(4号试样),上述3种织构组分的变化规律与2号试样相似。对于在晶粒生长期间持续变化的3种织构组分而言,1号试样的{1 1 1}<112>和{111}<110>织构组分的高(低)取向差角度晶界频率下降(上升),而{100}<001>织构组分的高(低)取向差角度晶界频率则上升(下降),但在2号试样中,这些织构组分的高(低)取向差角度晶界频率上升(或下降)的速率明显变小,同时在3号试样中,这些织构组分的高(低)取向差角度晶界频率上升(或下降)的速率与1号试样相似,随着铬含量的进一步增加,这些织构组分的高(低)取向差角度晶界频率上升(或下降)的速率与2号试样相似。根据以上试验结果,分析了铝和铬元素对晶界的作用机理。
The influence of aluminum and chromium on texture and grain boundary changes during grain growth of non-oriented electrical steel was studied. The experimental results show that the main texture components of electrical steel during grain growth are {111} <112>. During the grain growth, the {111} <112> and {111} <110> texture components were strengthened and the {100} <001> texture components were weakened in the aluminum- , The rate of strengthening (increasing) of {111} <112> and {111} <110> texture components in Sample No. 2 containing 0.2% aluminum (mass fraction) , {100} <001> texture components change is not obvious, or even slightly increased. After the addition of 0.3 5% chromium (sample No. 3), the change rule of the {111} <112> {, 111} <110> and {100} <001> texture components in the aluminum- Sample No. 1 was similar, but when 0.72% chromium was added to the electrical steel (Sample No. 4), the variation of the three texture components was similar to that of Sample No. 2. The high (low) orientation difference angle for {1 1 1} <112> and {111} <110> texture components of Sample No. 1 for the three texture components that continuously vary during grain growth The grain boundary frequency decreases (increases), while the {100} <001> texture increases (decreases) at the high (low) orientation difference angular grain boundaries. However, in the sample No. 2, The rate of increase (or decrease) in the high (low) misorientation grain boundaries was significantly reduced, while the frequency of the high (low) misorientation angle grain boundaries in Sample 3 increased (or decreased) Similar to that of sample No. 1, with the further increase of chromium content, the frequency of grain boundary of high (low) orientation difference of these texture components increases (or decreases) at the same rate as that of sample No. 2. Based on the above experimental results, the mechanism of action of aluminum and chromium on the grain boundaries was analyzed.