PRODUCTION METHOD OF GRAIN-ORIENTED SILICON STEEL WITH HIGH MAGNETIC FLUX DENSITY

摘要

A production method of grain-oriented silicon steel with high magnetic flux density includes the following steps: 1) smelting and casting, wherein the components of molten steel are: C 0.035-0.065wt%, Si 2.9-4.0wt%, Mn 0.05-0.20wt%, S 0.005-0.012wt%, Als 0.015-0.035wt%, N 0.004-0.009wt%, Sn 0.005-0.090wt%, Nb 0.200-0.800wt%, and balance Fe; 2) hot rolling; 3) normalization; 4) cold rolling; 5) decarburization annealing; 6) coating MgO; 7) high-temperature annealing, wherein the temperature is raised to 700-900 ? firstly, and then to 1200 ? at a velocity V2nd heating of 9-17 ? / hr, and holding for 20 hours; 8) applying insulation coating.