Patent ID: 8333846

Claim:
A method for producing oriented silicon steel with high electromagnetic performance, comprising: smelting steel in a converter or an electric furnace; secondarily refining and continuously casting the molten steel to obtain a slab, followed by hot rolling, primary cold rolling, decarburizing annealing, secondary cold rolling; applying an annealing separator comprising magnesium oxide as the main component; then annealing at high temperature; and finally applying an insulating coating and carrying out stretch-leveling annealing, wherein the slab has the following composition based on weight percentage: C: 0.020%˜0.050%; Si: 2.6%˜3.6%; S: 0.015%˜0.025%; Als: 0.008%˜0.028%; N: 0.005%˜0.020%; Mn: 0.15%˜0.5%, and 10≦Mn/S≦20; Cu: 0.3%˜1.2%, and Cu/Mn≧2; and balance components including Fe and unavoidable inclusions, wherein the process of high-temperature annealing comprises annealing in a dry atmosphere of hydrogen or mixed nitrogen and hydrogen where hydrogen accounts for over 75%, at 1170-1230° C. which is held for over 15 hours.