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对商用50W330型无取向硅钢成品在930℃下保温2 h固溶并以不同方式冷却处理,利用磁性检测仪检测分析了处理前后的磁感和铁损变化,应用光学显微镜、扫描电子显微镜、X射线衍射仪观测分析了显微组织结构的演变。考察了平均晶粒尺寸、织构组分比及第二相粒子状态对磁性能的影响规律,结果表明:固溶处理前后平均晶粒尺寸的变化对硅钢磁性能的影响非常显著;当平均晶粒尺寸相差不大时,织构组分比[Goss+{100}]/{111}越大,磁感会越高;固溶处理会将细小弥散的第二相粒子重新回溶到基体中,减小了其对磁畴壁的钉扎作用,铁损随之下降。
The commercial 50W330 non-oriented silicon steel was heat-treated at 930 ℃ for 2 h and cooled in different ways. The changes of magnetic induction and iron loss before and after treatment were detected by magnetic detector. The optical microscope, scanning electron microscope, X The evolution of the microstructure was analyzed by the ray diffractometer. The effects of average grain size, texture composition ratio and phase state of second phase on the magnetic properties were investigated. The results show that the influence of the average grain size before and after solution treatment on the magnetic properties of silicon steel is very significant. When the size of the particles is small, the larger the texture component ratio [Goss + {100}] / {111} is, the higher the magnetic induction will be. The solution treatment will re-dissolve the finely dispersed second phase particles into the matrix, Reduce its pinning effect on the magnetic domain wall, the iron loss decreases.