Precipitates in electrical steels
Precipitates in electrical steels
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DOI：
10.1016/j.jmmm.2008.03.062
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发表时间：
2008-10-01
影响因子：
2.7
通讯作者：
Lindenmo, Magnus
中科院分区：
文献类型：
--
作者：
Jenkins, Keith;Lindenmo, Magnus
析出物对电工钢的磁性有很大影响，作为制造过程中的关键控制要求，或作为最终产品中有害的残留物。在本工作中，铜锰硫化物析出物是所研究的常规取向(CGO)钢中的主要缓蚀剂，晶界钉扎是有效的，析出物的平均尺寸为30-70 nm。对CuMnS的生长进行了研究，结果表明，在加热条件下，大于100 nm的析出物允许二次再结晶的开始，并研究了析出物对最终产品取向钢和无取向钢的磁性能的影响。仍然含有大量析出物的颗粒取向材料的例子清楚地表明了总功率损失增加40%或更多的不利影响。在观察到碳氮化钛析出物的高硅无取向材料样品中，损耗恶化约20%。在这种情况下，沉淀物被认为是在最终退火后的冷却过程中形成的。最后给出了一种具有大量极小析出物的取向钢，这些析出物似乎对磁性能没有任何不利影响。(C)2008爱思唯尔B.V.保留所有权利。
Precipitates heavily influence the magnetic properties of electrical steels, either as a key controlled requirement as part of the manufacturing process or as an unwanted harmful residual in the final product. In this current work copper-manganese sulphides precipitates are the primary inhibitor species in the conventional grain-oriented (CGO) steels examined and grain boundary pinning is effective at a mean precipitate size of 30-70 nm. The growth of CuMnS has been studied and the results show that a precipitate size above similar to 100 nm allows the onset of secondary recrystallisation in the heating conditions applied.The effect of precipitates on the magnetic properties of both grain-oriented and non-oriented steels in their final product form is then examined. Examples of grain-oriented material still containing large numbers of precipitates clearly show the detrimental effects with increases in total power loss of 40% or more. Loss deterioration by about 20% is also seen in samples of high silicon non-oriented material in which titanium carbo-nitride precipitates have been observed. In this case the precipitates are believed to have formed during cooling after final annealing. Finally a grain-oriented steel with a large number of very small precipitates, which do not seem to have any harmful effect on the magnetic properties, is demonstrated. (c) 2008 Elsevier B.V. All rights reserved.