摘要:
为了深入研究杂质元素对硅钢成品电磁性能的影响,结合工业化生产的0.25%Si无取向硅钢,探讨了C、S、O、N、Nb、V、Ti杂质元素总量分别为83×10-6和105×10-6时,硅钢成品的夹杂物、显微组织及电磁性能变化。结果表明,杂质元素总量会直接影响夹杂物的种类、形貌、数量和尺寸。随杂质元素总量的升高,在0~0.2μm尺寸范围内,单个的、椭球形的Mn S、CuxS夹杂物数量明显增多,两者分别为1 679×104个/mm3和2 661×104个/mm3。这种细小的夹杂物会不同程度的劣化SRA前后硅钢成品的磁感,然后是SRA前硅钢成品的铁损,对SRA后硅钢成品的铁损则影响不大。随着连退温度的升高,杂质元素总量对SRA前硅钢成品的铁损影响差异逐渐缩小为零。
Abstract:
In order to investigate the effects of impurities elements on the electromagnetic properties,the relationship among total inclusions amount,microstructures and electromagnetic properties of the finished steel sheets was discussed under 83 × 10-6 and 105 × 10-6 total amount of impurities elements C,S,O,N,Nb,V and Ti for industrial manufacture of 0.25% Si non-oriented silicon steel sheets. The results showed that the impurities elements amount will affect the type,kind,number and size of the inclusions.As the impurities elements amount increases,the numbers of single and ellipsoid MnS and CuxS with size range of 0~0.2 μm dramatically increases from 1 679 × 104/mm3 to 2 661 × 104/mm3. The fine inclusions greatly reduce magnetic induction of the finished steel sheets before and after SRA,and have little effect on core loss of the finished steel sheets before SRA,and less effects on the core loss of the finished steel sheets after SRA. with increase of continuous annealing temperature,the variation of core loss the finished steel sheets before SRA due to different impurities elements amount will decrease to zero.
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