| 摘要 |
PURPOSE: A method for producing an aromatic electric steel plate is provided to have the excellent characteristic of magnetic flux density in a larger range by adding a specific component controlled to be able to heat a slab of low temperature and by stabilizing a secondary recrystalline. CONSTITUTION: A silicon steel slab composed of 0.020-0.045% of a C, 2.90-3.30% of a Si, 0.05-0.30% of a Mn, 0.001-0.012% of a B, 0.005-0.019% of an Al, 0.003-0.008% of a N, a S under 0.007%, 0.030-0.70% of a Cu, 0.03-0.07% of a Ni, 0.03-0.07% of a Cr, a P under 0.020%, a Fe and other impurities. The silicon steel slab is re-heated at a temperature within 1050-1250°C and a cold rolled sheet of 0.23-0.7mm is made by cold-rolling at first after a hot rolling and an annealing of hot rolled sheet. The cold rolled sheet is annealed to be a remained carbon amount under 30ppm and a whole nitrogen amount of 125-82.9(1+(Cu%+10(Ni%+Cr%)))ppm and to generate a decarbonization and a nitrification for 30seconds-10minutes at 850-950°C under a gas atmosphere contained a nitrogen having a dew point of 30-70°C at the same time. Thereby an aromatic electronic steel plate of high magnetic flux density is produced by spreading a separating agent of annealing and by annealing at a high temperature.
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