【摘要】 为考察正火处理对某种卷取温度为680℃的冷轧无取向50W470低碳电工钢的显微组织和磁性的影响,对其热轧坯料进行了1000℃×0.5 min的正火处理,然后分别对无正火和有正火的热轧坯料进行了冷轧和退火加工。分析研究了正火处理对不同退火时间下材料晶粒尺寸的影响以及各工艺环节析出物尺寸分布,并测定了有无正火条件下材料的最终磁性。结果表明,正火处理使冷轧退火后材料的晶粒尺寸和析出物尺寸增大,从而使磁感应强度B50略有增高,铁损P15/50有较明显的降低。更多还原

【Abstract】 In order to investigate the effects of normalization on the microstructure and magnetic properties of 50W470 non-oriented electrical steel coiled at 680 ℃,the hot rolled tape was normalized at 1000 ℃ for 0.5 min.Then the normalized and non-normalized samples were cold rolled and annealed respectively.The effects of normalization on the grain size obtained from different annealing times and the precipitate size distributions after every process steps were analyzed.The final magnetic properties of the normalized and non-normalized samples were measured.The results show that the normalizing enables the grain size and precipitate size to become larger and consequently leads to the magnetic induction B50 slightly higher and the core loss P15/50 obviously lower.更多还原