The influence of thermomechanical processing conditions on magnetic properties of electrieal steels

摘要

The paper deals with the influence of thermomechanical treatment on properties of non-oriented electrieal steels processed at cryogenic and ambient temperature. The main objective of research was to determine the effect of annealing conditions on magnetic properties in samples processed by rolling at cryogenic temperature. From customers' point of view, there are high demands on the magnetic properties of products made of electrieal steels, such as high magnetic induetion, Iow coercive force and Iow magnetic losses. Experimental results revealed that mechanism of plastic deformation during cryogenic rolling is different than during rolling at ambient temperature. A great amount of defor-mation twins has been found in the sample subjected to cryogenic rolling. Moreover, the advanced magnetic properties after annealing was obtained in the cryo-rolled sample thanks to the presence of preferable texture (greater portion of a cubic component) and optimal grain size.