QUANTIFICATION OF EVOLUTION OF ALN AND MN S PRECIPITATES IN ELECTROTECHNICAL STEELS

The paper deals with precipitate chemical composition of Fe-3%Si steel after hot rolling, cold rolling, decarburization annealing, and in th e final state. Secondary microphases were obtained by electrochemical and chemical methods of isolation. Using EDX, X-ray diffraction,, and chemical analyses, it was found that the precipitate fraction, from ho t to final state, is decreasing, but the content of the particle-forma ting elements Al, Mn, and Ti is increasing. In the final state of Fe-3 %Si steel there is more AlN precipitates than of Al2O3 ones and the nu mber of the MnS particles is doubled.