Modelling And Calcaulation Of Nitriding And AlN Precipitation At High Temperature In Grain-Oriented Silicon Steel

The finding of great enhancement in magnetic property of Cold-Rolling Orientated Silicon Sheet quickly allured flourish abroad research enthusiasm since there would be benefit to render{110}<001>texture in silicon steel sheet. So how to acquire more{110}<001>texture in silicon sheet is currently under academic spotlight.Recent research discover that the{110}<001>texture is a problem which should utilize second phase particles to control secondary recrystallization; to be in short, the key factor to restrain recrystallization is particles which precipitated from dispersion distribution inhibitors, the driving force coming along with this procedure. By consideration of the critical factor of inhibitor in manufacturing of silicon sheets, how to increase amount of inhibitor of AIN in fabrication of grain-oriented steel is coming as a crux. Many references state that nitrding process may enhance amount of AIN, but there are still too few relevant references to browse specific discussion in this affairs with numerical calculation. So the major in this thesis is taking analysis about nitrding models all round, construct proper model to cater our demand in diffusion kinetic, atmosphere decomposition, adsorption and nucleation interdisciplinary, getting a company with phrase diagram of the Fe-Al-Mn, decholesterinization volume and classic nucleation theory, by using above mentioned, we can induct agreeable model, testing and rejoining its error (error parameter less than 7.5×10-7g). It is also a convenient for us to inducing the effective diffusion coefficient in nitrogen and its connection between nitrogen coefficient and temperature along with the relation in diffusion activation energy. From that we concluded that with finite temperature, the amount of nitrogen increased with enhancing of temperature, the concentration gradient will be aggrandizing with slope. It would be very effective, if these models which were established in this thesis could be utilized and applied in manufacturing process due to nitrding process for silicon sheet.