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测量了1.35%Si无取向硅钢的静态CCT曲线,根据静态相变点测量了实验钢的动态CCT曲线,根据动态相变点设计了不同冷却速度的模拟热轧实验并利用EBSD技术对不同冷却速度的退火试样进行微观织构分析。实验结果表明:冷却速度越小,奥氏体向铁素体转变开始温度越高,再结晶程度越高,再结晶组织晶粒越粗大;热轧退火织构分布与在两相区终轧有明显关系,主要织构类型有旋转立方织构、{111}<121>织构、{111}<110>织构和立方{100}<001>织构;随着冷却速度上升,{111}<121>织构、{111}<110>织构和立方{100}<001>织构含量下降,旋转立方织构含量上升,高斯织构含量较稳定。
The static CCT curve of 1.35% Si non-oriented silicon steel was measured. The dynamic CCT curve of the experimental steel was measured according to the static transformation point. The simulated hot rolling experiment with different cooling rates was designed according to the dynamic transformation point. Of the annealed samples for microstructure analysis. The experimental results show that the smaller the cooling rate is, the higher the austenite to ferrite transformation start temperature is, the higher the recrystallization degree is, the larger the grain size of the recrystallized structure is; (111} <121> texture, {111} <110> texture and cubic {100} <001> texture. As the cooling rate increases, the {111} The texture content of {121} texture, {111} <110> texture and cubic {100} <001> texture decreased, the content of rotating cubic texture increased, and the content of Gaussian texture was stable.