测量了W600无取向硅钢(1.35Si-0.25Mn-0.28Al)的静态CCT曲线,根据静态相变点测量了W600的动态CCT曲线。根据动态相变点使用Gleeble3500模拟了实际热轧过程,获得了不同冷速的再结晶组织,使用EBSD技术研究了不同冷却速度下获得的热轧试样的微观织构。使用SEM和EDS观察了W600钢的铸坯以及不同冷速获得试样中的析出物分布情况。实验结果表明:在无取向硅钢的α→γ相变中,冷却速度越低相变温度越高,在动态相变中,当冷却速度为0.75℃/s时,相变开始温度为988℃,相变结束温度为875℃;施加形变也有利于相变温度的提高。热轧模拟实验中,较低的冷却速度有利于获得粗大的再结晶晶粒;随着冷却速度减小,立方织构和γ织构含量上升,旋转立方织构含量下降,其中在冷速为0.25℃/s时,{111}<121>织构含量达28.5%,{111}<100>织构含量达32.4%。Al N和Mn S为W600钢中的典型析出物。铸坯中析出Al N析出物和Mn S+Al复合析出物平均尺寸均高于后续热轧模拟试样。热轧模拟实验中,冷速较快时,存在大量细小弥散状的Mn S析出物,Al N存在于Al N+Mn S复合析出物而存在,单独存在的Al N析出较少。当冷速降低时,析出物的总数量减少且尺寸变大,单独存在的Mn S析出物逐渐消失。 The static CCT curve of W600 non-oriented silicon steel (1.35Si-0.25Mn-0.28Al) was measured and the dynamic CCT curve of W600 was measured according to the static transformation point. According to the dynamic transformation point, Gleeble3500 was used to simulate the actual hot rolling process, and the recrystallized microstructure was obtained at different cooling rates. The microstructure of the hot rolled specimens obtained at different cooling rates was studied by EBSD technique. SEM and EDS were used to observe the distribution of precipitates in W600 steel slabs and samples obtained at different cooling rates. The experimental results show that the phase transformation temperature is higher in the α → γ phase transformation of non-oriented silicon steel, the phase transition temperature is 988 ℃ when the cooling rate is 0.75 ℃ / s in the dynamic phase transition, The end of the phase transition temperature is 875 ℃; deformation is also conducive to the phase transition temperature increase. In the hot rolling simulation experiment, the lower cooling rate is beneficial to obtain coarse recrystallized grains. With the decrease of cooling rate, the cubic texture and γ texture content increase, and the content of rotating cubic texture decreases. The texture content of {111} <121> reaches 28.5% and the content of {111} <100> texture reaches 32.4% at 0.25 ℃ / s. Al N and Mn S are typical precipitates in W600 steel. The average size of precipitated Al N precipitates and Mn S + Al composite precipitates in slab was higher than that of subsequent hot rolled simulation samples. In the hot-rolling simulation experiment, a large number of fine and dispersed MnS precipitates exist at high cooling rates. AlN exists in the AlN + MnS composite precipitates, and the presence of AlN alone is less. When the cooling rate is decreased, the total amount of precipitates decreases and the size becomes larger, and the precipitates of Mn S that exist alone gradually disappear.