EFFECT OF VC PRECIPITATES ON THE FORMATION OF MICROSTRUCTURES AND MAGNETIC PROPERTIES OF GO ELECTRICAL STEELS

Ivan Petryshynets – František Kováč – Viktor Puchy – Martin Šebek – Jozef Maruš

   Some new procedures of grain-oriented (GO) steels processing have been used in the present work. The suggested approach combines an application of new systems vanadium carbide (VC) nano - particles, temper rolling processes and the dynamic continuous annealing for the secondary recrystallization in the investigated steels. The experimental grain-oriented steels with proposed systems VC inhibitors and at state after temper rolled were subjected to dynamical (fast heating) annealing in order to obtain abnormal grain growth with Goss crystallographic orientation and considerably reduce the preparation time so that the whole process lasts only several minutes. The EBSD analysis shown that suggested procedure led to evolution of the sufficiently strong {110}<001> Goss texture, which is comparable to that obtained in the conventionally treated GO steels. Moreover, the steels treated by the newly developed method showed similar magnetic properties as the material which was passed after the long-time heat treatment. The achieved coercive field values of the laboratory treated samples are nearly identical (AC conditions) or even slightly lower (DC conditions) to those of reference samples taken after industrial final box annealing.

Keywords: GO silicon steel, magnetic anisotropy, coercivity, texture analysis, microstructure

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