析出相质点对取向硅钢二次再结晶的影响

Effect of precipitated phase particles on secondary recrystallization in grain oriented silicon steel

基于Humphreys回复、再结晶和晶粒长大统一理论,研究了析出相质点的Zenner钉扎对Fe-3%S i取向硅钢二次再结晶的影响。比较了一般取向硅钢(CGO)和高磁感取向硅钢(HGO)的晶粒尺寸、晶界参数以及析出相质点的Zenner钉扎因子。结果表明,高斯晶粒与普通晶粒相比没有明显的尺寸优势,具有强烈高斯织构的HGO在晶界能和晶界活动性上与CGO的差异非常小,二者具有相近的临界Zenner因子;但HGO中析出相质点更为细小和弥散,其Zenner因子是CGO的2.8～5.0倍,因此HGO中Zenner因子更大,其高斯晶粒更容易率先达到临界条件而发生二次再结晶,从而在二次再结晶后具有更强的高斯织构。

Effect of Zenner pinning exerted by precipitated phase particles on secondary recrystallization in grain oriented silicon steel were investigated based on the unified theory of recovery, recrystallization and grain growth proposed by Humphreys. Conventional grain oriented Fc-3% Si steel （CGO）and high permeability grain oriented Fc-3% Si steel （HGO）were compared in grain sizes, grain boundary parameters and the Zenner pinning factor of precipitated phase particles. The results show that the size is a small difference between Goss grains and average grains. The steel（HGO） with intense Goss texture appears little difference to CGO both from grain boundary energy and mobility points of view. The precipitated phase particles of HGO are finer and evener than that of CGO. The Zenner pinning factor of HGO is CGO＇s 2. 8 to 5.0 times. The larger Zenner pinning factor of HGO indicates that Goss grains in HGO are easier to reach the critical condition of secondary recrystallization than that in CGO,which leads to sharper Goss texture.