| 摘要 |
A process for producing silicon steel having a cube-on-edge orientation and a permeability of at least 1850 (G/Oe) at 10 oersteds, which includes the steps of: preparing a melt of steel consisting essentially of, by weight, up to 0.07% carbon, from 2.60 to 4.0% silicon, from 0.03 to 0.24% manganese, from 0.01 to 0.09% of material from the group consisting of sulfur and selenium, from 0.015 to 0.04% aluminum, up to 0.02% nitrogen, from 0.1 to 0.5% copper, from 0.00045 to 0.0035% boron, balance iron; casting the steel; hot rolling the steel; annealing the steel prior to a final cold roll at a temperature of from 1400 DEG to 2150 DEG F; cooling the steel from a temperature below 1700 DEG F and above 750 DEG F to a temperature at least as low as 500 DEG F with a liquid quenching medium or gaseous stream and from its maximum annealing temperature to the temperature below 1700 DEG F and above 750 DEG F at a rate which is no faster than one wherein the steel is cooled in a static atmosphere or in a continuous processing line where there is some relative motion between the atmosphere and the steel, although the only deliberate motion is that imparted to the steel; and cold rolling the steel at a reduction of at least 80%. |
