Combining with the study of analogue experiments and test analysis, the kinetics of precipitation and growth of AlN and MnS in nonoriented electrical steel produced by the CSP process is calculated. The results show that the precipitate phase particles of AlN and MnS in typical nonoriented electrical steel grades produced by the CSP process have grown to some extent in the soaking stage, but the precipitation contents are less than 20% of the total contents of nitride and sulfide. The precipitate phase particles of AlN and MnS have precipitated almost after the hot rolling process. The precipitation contents are more than 80% of the total contents of nitride and sulfide, but it is very late for the precipitate phase particles to grow at the end of the hot rolling process.
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