4results about How to "High magnetic induction" patented technology

The invention discloses high-magnetic-induction oriented silicon steel, which contains Fe and inevitable impurities, and also contains the following chemical elements in percentage by mass: Clt; 0.001% of the total weight; 2.5 to 4.0% of Si; mn: 0.05 to 0.20%; slt; 0.0005%, 0.0005%; the content of Als is 0.015 to 0.045 percent; nlt; 0.005% of the total amount of the raw materials; 0.03% to 0.3% of Cu; and at least one of the following chemical elements: 0 < = 0.03% of P, 0.01-0.40% of Cr, 0.03-0.30% of Sn, 0.001-0.1% of Sb, 0 < = 0.008% of Ti, and 0.001-0.1% of Nb. The invention also discloses a manufacturing method of the silicon steel, which comprises the following steps of: smelting and continuously casting and rolling a thin slab to obtain the thin slab; plate blank heating and hot rolling; normalizing and annealing; cold rolling; decarburization annealing; directly coating an annealing isolating agent without nitriding annealing, and carrying out high-temperature annealing; and insulating coating and flattening annealing.

The application belongs to the technical field of electrical steel manufacturing, and particularly relates to a continuous annealing tension control method for rare earth-containing non-oriented electrical steel, which comprises the following steps: S1, providing a rare earth-containing non-oriented electrical steel cold-rolled plate as raw material, wherein the silicon content of the rare earth-containing non-oriented electrical steel cold-rolled plate is 4.0wt%-4.5wt%, and the rare earth neodymium content is 0.015wt%-0.02wt%; S2, performing continuous annealing treatment on the rare earth-containing non-oriented electrical steel cold-rolled plate, wherein the continuous annealing treatment sequentially passes through an uncoiler, an inlet loop, a degreasing section, a furnace zone annealing section, a coating section, a baking section, an outlet loop and a coiler; the tension of each section is accurately controlled and matched with the thickness, temperature and speed, so that the annealed plate realizes the reduction of iron loss and the promotion of magnetic induction while ensuring good plate shape, promotes the nucleation of the texture beneficial to the magnetic performance, avoids the quality problems such as instability, narrowing, belt breakage and wrinkle in the annealing process, and realizes the double optimization of electromagnetic performance and physical plate shape.

The present application discloses a high magnetic induction non-oriented electrical steel sheet, which contains Fe and inevitable impurities, and further contains chemical elements with mass percentage as follows: C≤0.003%, Si: 1.2-3.0%, Mn: 0.1-0.6%, P: 0.01-0.15%, Al: 0.1-0.4%, Ni: 0.05-1.0%; and satisfies Si+Al: 1.3-3.2%; and does not contain Sn and Sb. In addition, the present application further discloses a manufacturing method of the above high magnetic induction non-oriented electrical steel sheet, which comprises the following steps: (1) smelting and casting; (2) heating, rough rolling, finish rolling and coiling: wherein the thickness of the intermediate blank after rough rolling is controlled to be 20-45 mm, and the thickness of the sheet after finish rolling is 1.2-2.0 mm; and after coiling, aging treatment is carried out in the range of 550-650 ℃ during temperature drop for 1-4 h, so that the proportion of equiaxed crystal with the ratio between long and short axes between 1.0-4.0 in the microstructure of the sheet is ≥75%; (3) pickling; (4) primary cold rolling; (5) continuous annealing; (6) insulation coating.

The application discloses a kind of non-oriented electrical steel, by the secondary annealing of substrate preparation is obtained, the secondary annealing includes: stage one heating: heating to 800~820 ℃ at a rate of 8~12 ℃ / min, 1~3h is kept; Stage two cooling: cooling to 590~610 ℃ at a rate of 2~4 ℃ / min;Stage three cooling: to 25~30 ℃ by 4~6 ℃ / min rate is reduced.The application is optimized by accurate component design and segmented secondary annealing process, realizes the iron loss reduction and magnetic property promotion of non-oriented electrical steel, adapts high-end compressor core demand, process is stable and easy to industrialization promotion.