Al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

研究了含Al和不含Al的无取向电工钢在晶粒长大过程中织构转变及晶界变化的规律。结果表明,晶粒长大过程中电工钢的主要织构组分均为{111}〈112〉。在晶粒生长期间,不加Al的电工钢中{111}〈112〉、{111}〈110〉织构组分强化,而{100}〈001〉织构组分弱化。与不加Al的钢相比,加Al后,{111}〈112〉、{111}〈110〉织构组分强化的速率下降,{100}〈001〉织构组分变化不明显,甚至稍有增加。对于在晶粒生长期间持续变化的{111}〈112〉、{111}〈110〉和{100}〈001〉织构组分而言,{111}〈112〉和{111}〈110〉织构组分的低取向差角度晶界频率上升,而{100}〈001〉织构组分的低取向差角度晶界频率下降,但加入Al后,这些织构组分的低取向差角度晶界频率下降的速率明显变小。

Effect of Al in the Nonoriented Electrical Steel on Texture and Grain Boundary Development During Grain Growth

The rules of texture and grain boundary transformation in the nonoriented electrical steel during grain growth were investigated.The experimental results have shown that the main texture component is {111}〈112〉 in the electrical steel.The {111}〈112〉 and {111}〈110〉 components in the nonoriented electrical steel without Al were strengthened during grain growth whereas {100}〈001〉 component was weakened,but the growth rate of {111}〈112〉 and {111}〈110〉 component decreased,while the area fraction of {100}〈001〉 component did not change significantly in the steel containing Al.For the {111}〈112〉,{111}〈110〉 and {100}〈001〉 components to be continuously changed during grain growth,the frequency of low angle misorientation grain boundary of {111}〈112〉 and {111}〈110〉 components increased,and that of {100}〈001〉 component decreased.After Al was added in the steel,the frequency decreasing rates brought low.