退火对TSCR生产低碳低硅无取向硅钢的影响

Effect of Annealing on Low-carbon and Low-silicon Non-oriented Silicon Steel Produced by TSCR

研究TSCR流程生产的低碳低硅无取向硅钢在850～1 000℃退火对0.5 mm成品的组织、析出物、织构和磁性能的影响;同时对950℃×5 min与950℃×7 min退火效果进行了对比。结果表明,适当提高退火温度和延长退火时间,有利于晶粒尺寸增大和均匀;相应的铁损降低,磁感应强度提高。析出物主要为较粗大的AlN和MnS复合析出物,未发现小于0.1μm细小弥散的AlN和MnS。退火板表面处存在较强不利于磁性的γ纤维织构,而中心处γ纤维织构明显减弱。在中心处有利于磁性的{001}<010>立方织构增强,{110}<001>高斯织构基本维持不变。

The effect of annealing at 850～1 000 ℃ on structure,precipitate,texture and magnetic properties of 0.5 mm low-carbon and low-silicon cold-rolled non-oriented silicon steel produced by TSCR has been researched.Meanwhile,the impact of annealing at 950 ℃×5 min and 950 ℃×7 min has been compared.The results show that the grain size increased and became more uniformity with increasing annealing temperature and prolonging annealing time.So the iron loss decreased and the magnetic induction increased.The main precipitates were coarse AlN and mulriple precipitation of MnS.There was no less than 0.1μm small dispersion of AlN and MnS.The surface of annealed cold rolled sheets was relatively strong γ fiber texture which is harmful to magnetic induction,while the γ fiber texture weakens obviously in the center of it.The {001}〈010〉 cubic texture enhanced and {110}〈001〉 gauss texture basically remained unchanged in the center of annealed cold rolled sheets.