9results about How to "High magnetic induction" patented technology

The invention relates to a preparation method of an ultrathin non-oriented silicon steel strip, belongs to the technical field of non-oriented silicon steel, and solves at least one of the following problems in an existing preparation method and a product of the non-oriented silicon steel strip: the magnetic performance is difficult to reach a high standard, and the product quality is difficult to guarantee while the thickness is reduced; and the preparation process flow is relatively tedious. The preparation method comprises the following steps: S1, selecting a non-oriented silicon steel plate with the initial thickness of 0.15-0.35 mm as a base material; s2, the base metal is subjected to cold rolling at the room temperature, and a cold-rolled ultrathin strip with the final thickness ranging from 0.03 mm to 0.08 mm is obtained through multi-pass cold rolling; and S3, the cold-rolled ultrathin strip is annealed. The preparation method is easy to operate and short in technological process, and the obtained strip product is high in magnetic induction, low in iron loss, very thin in thickness and good in surface quality and mechanical property.

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 invention relates to an ultrathin non-oriented silicon steel strip and a preparation method thereof, and belongs to the technical field of non-oriented silicon steel. At least one of the following problems existing in an existing ultrathin non-oriented silicon steel strip and a preparation method thereof is solved: the magnetic performance is difficult to reach a high standard, the product quality is difficult to guarantee while the thickness is reduced, and the preparation process is relatively tedious. The invention relates to an ultrathin non-oriented silicon steel strip, the thickness tf of the strip is less than or equal to 0.10 mm, and the texture type comprises a higher content of lambda-line ({001} lt; hk0gt; hk0gt; ), [eta]-line ({0kl} lt; 100 gt; ), lt; 115gt, 115gt; / / ND, and low-content gamma-line (ND / / lt; 111gt, 111gt; and texturing. According to the ultrathin non-oriented silicon steel strip and the preparation method thereof, high magnetic induction, low iron loss, ultrathin thickness and good mechanical property and surface quality are achieved.

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 invention discloses a non-oriented electrical steel sheet with excellent magnetic properties, which contains Fe and inevitable impurities, and further contains the following chemical elements in the following mass percentages: 0<C≤0.0025%; Si: 0.2~1.6%; Mn: 0.2~0.6%; Al: 0.2~0.6%; V: 0.001~0.008%; N: 0.002~0.0045%; 0<Nb≤0.003%; 0<Ti≤0.003%. In addition, the present invention also discloses a method for manufacturing the above-mentioned non-oriented electrical steel sheet with excellent magnetic properties, which comprises the following steps: (1) smelting and casting; (2) hot rolling, the steel coil after hot rolling is directly subjected to the next step without normalizing annealing or bell furnace annealing; (3) pickling; (4) cold rolling; (5) finished product annealing: from room temperature, the cold-rolled steel sheet is rapidly heated to the target soaking temperature at a heating rate of 80 to 1000°C / s. The non-oriented electrical steel sheet of the present invention has excellent electromagnetic properties, low iron loss and high magnetic induction, can be effectively used to make iron cores, and has good promotion prospects and application value.

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.

The invention discloses a preparation method of rare earth non-oriented silicon steel 50W600. The preparation method comprises the steps that a converter is adopted for smelting, RH is adopted for vacuum treatment, and 30-50 kg of 20% rare earth Ce-Fe alloy is added after vacuum treatment is finished; the non-oriented silicon steel 50W600 comprises the following chemical components in percentage by mass: less than or equal to 0.0030% of C, 1.25-1.45% of Si, 0.75-0.95% of Mn, less than or equal to 0.070% of P, less than or equal to 0.003% of S, 0.30-0.50% of Als, less than or equal to 0.0020% of Ti, less than or equal to 0.0020% of N, 0.0010-0.0040% of Ce and the balance of Fe and inevitable impurities, and the total mass fraction is 100%. According to the preparation method of the rare earth non-oriented silicon steel 50W600, the magnetic performance of the non-oriented silicon steel can be effectively improved, and the iron loss is particularly obviously reduced.

The present application discloses a high magnetic permeability non-oriented silicon steel and a preparation method. The preparation method comprises: steelmaking, continuous casting, the chemical composition of the continuous casting billet comprises by mass percentage: C≤0.0025%, Si: 0.38~0.92%, Mn: 0.2~0.3%, Al: 0.28~0.45%, S≤0.003%, the remainder being Fe and impurities; hot rolling, cold rolling; hood annealing,,, [T1] represents the smallest integer not less than T1; continuous annealing,; cooling, coating and finishing. The low-grade non-oriented silicon steel prepared in the present application has not only low iron loss, but also high magnetic induction and high magnetic permeability without adding Sn, Sb precious metal materials and without undergoing normalization process, and can greatly reduce the loss of small-power motors when applied to core materials.