Abstract
Compared with the common electrical steel, the high silicon electrical steel (Fe-6.5 wt%Si alloy) exhibits excellent soft magnetic properties and a wide application prospect in high frequency electromagnetic fields. However, the inadequate ductility and limited formability are the two well-known bottlenecks that severely limit the widespread engineering application of Fe-6.5 wt%Si alloy. In this study, composite slabs with columnar-grained Fe-6.5 wt%Si alloy at the inner part and pure iron at double sides were prepared by the Bridgman zone melting technology under the melting temperature of 1485±5°C and withdrawing velocity of 1mm/min. The composite slab could be directly warm-cold rolled to prepare sheet with the thickness of 0.2mm and slight edge cracks. A new technical prototype for producing Fe-6.5 wt%Si alloy sheets was proposed with high efficiency and compact process.
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