104results about How to "High magnetic induction" patented technology

The present invention is high magnetic induction and high grade non-orientation electrical steel and its making process. The high magnetic induction and high grade non-orientation electrical steel consists of C not more than 0.0050 wt%, N not more than 0.0030 wt%, Si 1.50-2.50 wt%, Al 0.80-1.30 wt%, Mn 0.20-0.50 wt%, P not more than 0.030 wt%, S not more than 0.005 wt%, Sb 0.03-0.10 wt% or Sn 0.05- 0.12 wt%, and B 0.0005-0.0040 wt%, except Fe and inevitable impurities. Its making process includes initial rolling and high temperature winding to obtain ideal hot rolled steel belt structure; cold rolling to provide the energy for crystal grain growth in re-crystallizing annealing, and re-crystallizing annealing in controlled temperature to obtain ideal crystal grain structure. It has excellent surface quality, high magnetic induction and low iron loss, and is suitable for use in high efficiency motor iron core.

The present invention relates to a method for producing low-iron-loss high-magnetic-induction cold-rolled non-oriented electrical steel strip by using cap cover furnace annealing treatment. Said method includes the following steps: (a), raw material preparation: including (by wt%) C, its content is loss than or equal to 0.010%; Si, its content is 0.1-3.50%; Al, its content is less than or equal to 1.5%; Man, its content is 0.10%-1.50%; P, is content is less than or equal to 0.20%; S, its content is less than or equal to 0.008%; N, its content is less than or equal to 0.0030%, and the rest is iron and inevitable impurity; (b), smelting, continuous casting and hot-rolling; (c), normalizing treatment, making hot-rolled sheet undergo the process of normalizing treatment, under the condition of cap cover furnace making full hydrogen annealing, annealing temperature is 700 deg.C-900deg.C; (d), cold-rolling to obtain cold-rolled sheet; and (e), annealing treatment, making cold-rolled sheet undergo the process of annealing treatment so as to obtain the invented product.

The present invention is the double-roller thin belt continuous casting process of producing non-oriented electrical steel. Molten steel containing silicon in 0-3.5 % is made to pass through two crystallizing rollers to form coagulated shell and led out the crystallizing rollers to form cast belt; and the belt is hot rolled in a hot milling roll at 800-1000 deg.c to produce a hot rolling deformation of 5-25 % and wound. The simple technological process can produce high performance non-oriented electrical steel effectively.

In a superconductive connection for two end pieces of superconductors that each have a matrix of normally-conductive material and at least one superconductor lead, of superconductive material, in the matrix, and in a method for making such a superconductive connection, the respective end pieces of the conductor leads are stripped of the matrix material and are inserted into a sheath or bushing. MgB₂, as superconductive contacting material, is additionally inserted into the sheath or bushing, so as to at least partially fill regions in the sheath or bushing between the conductor leads. The cross-section of the sheath or bushing is then reduced.

The invention relates to an iron-based soft magnetic composite magnetic powder core and a preparation method thereof. The invention adopts the technical scheme as follows: sequentially adding iron-based alloy powder, absolute ethyl alcohol, a silane coupling agent and distilled water into a reaction vessel according to the mass ratio of 1:(6-10):(0.04-0.10):(0.2-0.4), and stirring; adding tetraethyl orthosilicate or methyl silicate, then adding ammonia water, stirring continuously, washing, filtering and drying; placing the obtained composite powder with a core-shell heterostructure into an annealing furnace, performing heat preservation for 1-3 h under the condition of 600-800 DEG C, performing furnace cooling and performing compression moulding; sintering for 1-10 h under the condition of 900-1350 DEG C, so that the iron-based soft magnetic composite magnetic powder core is obtained after furnace cooling. The prepared iron-based soft magnetic composite magnetic powder core has the characteristics that the insulating property is good, the iron loss is low, high magnetic strength is achieved, the heat stability is good and the service life is prolonged when the iron-based soft magnetic composite magnetic powder core is used at a higher environment temperature.

The invention provides non-oriented electrical steel used for a stereoscopic transformer with a rolled iron core. The non-oriented electrical steel comprises, by weight, 0.001-0.003% of carbon, 0.6-1.5% of silicon, 0.3-1.0% of aluminum, 0.2-0.8% of manganese, less than or equal to 0.1% of phosphorus, less than or equal to 0.003% of sulfur, less than or equal to 0.003% of nitrogen, less than or equal to 0.003% of titanium, less than or equal to 0.003% of niobium, less than or equal to 0.003% of vanadium, and balance iron and unavoidable impurities. The invention further provides a production method of the non-oriented electrical steel used for the stereoscopic transformer with the rolled iron core. The production method includes the production steps of converter smelting, RH refining, continuous casting, hot rolling, normalizing, acid tandem rolling, continuous annealing, coating, high-temperature batch-type furnace annealing and the like. The non-oriented electrical steel used for the stereoscopic transformer with the rolled iron core has the advantages of being high in magnetic induction and low in iron loss.

The invention discloses an amorphous soft magnet core and a manufacturing method thereof. The manufacturing method of the amorphous soft magnet core includes: manufacturing an amorphous soft magnet alloy tape; coiling the alloy tape into a circular core in the preset size; subjecting the circular core to magnetostatic field annealing to obtain exchange biasing; and subjecting the circular core subjected to magnetostatic field annealing to functional controllable operation of loop biasing. Maximum induction of the amorphous soft magnet core manufactured by the manufacturing method can be obtained by drive current as small as possible, and optimal operation is achieved.

The invention discloses a production method of high magnetic induction oriented silicon steel, comprising the following steps: a) carrying out steel-making and continuous casting to produce slabs, wherein the slabs comprise 0.05-0.10 wt% of C, 2.5-4.0 wt% of Si, 0.008-0.028 wt% of S, 0.008-0.040 wt% of Als, 0.004-0.012 wt% of N, 0.08-0.20 wt% of Mn, 0.08-0.30 wt% of Cu, and the balance of Fe; b) preserving heat at no higher than 1250 DEG C and then carrying out hot rolling, wherein the finishing temperature is higher than 850 DEG C; c) carrying out annealing, pickling, once cold rolling or twice cold rolling containing intermediate annealing to get finished product thickness; d) decarburizing annealing, and preserving heat in wet nitrogen-hydrogen protective atmosphere; e) coating an annealing isolation agent and then carrying out high temperature annealing; f) carrying out nitriding treatment; and g) coating an insulating coating, and carrying out stretching, flattening and annealing. According to the invention, the types and distribution of the inhibitor is adjusted, the stable and high inhibition capability is guaranteed, by cooperating with hot rolling and twice recrystallization, the high magnetic induction oriented silicon steel with stable properties is obtained.

The invention relates to a method for producing semi-processed cold-rolled non-oriented electrical steel, which comprises the steps of pickling, rolling, electrolytically degreasing, annealing and leveling of non-oriented hot-rolled silicon steel, wherein annealing is performed in a full-hydrogen bell-type annealing furnace by first heating to 730 to 820 DEG C within 10 hours, then recrystallizing and annealing for more than 12 hours at 730 to 820 DEG C, next slowly cooling to 600 to 500 DEG C, later on cooling in a cooling cover to 80 to 60 DEG C and finally discharging. In the semi-processed non-oriented cold-rolled electrical steel with a mark of 50WB800 produced by the invention, the product magnetism is characterized in that: the P1.5/50 is 7.181W/kg; and the B5000 is 1.708T. Compared with the requirements of corresponding standards of the common semi-processed cold-rolled non-oriented electrical steel, the iron loss value is reduced by 0.819W/kg, and the magnetic induction is improved by 0.008T. As a material for iron cores of motors and generators working in rotary magnetic fields, the semi-processed cold-rolled non-oriented electrical steel produced by the method has high magnetic performance and technical performance.

The invention relates to a method for preparing a non-oriented silicon steel with excellent magnetic property and high efficiency, which comprises the following steps: 1) smelting and casting: wherein the non-oriented silicon steel comprises the following chemical components by weight percentage: less than or equal to 0.0040% of C, 0.1-0.8% of Si, 0.002-1.0% of Al, 0.10%-1.50% of Mn, less than orequal to 0.2% of P, 0.04%-0.08% of Sb, less than or equal to 0.0030% of S, less than or equal to 0.0020% of N, less than or equal to 0.0020% of Ti, balance of iron and inevitable impurity; smelting the above components and casting to casting blank; 2) hot rolling, wherein the slab heating temperature is 1100 DEG C-1150 DEG C, the finishing temperature is 860 DEG C-920 DEG C; rolling and air cooling, wherein the air cooling time (t) is greater than or equal to (2+30*Sb%)s and less than or equal to 7s; reeling at the temperature of 720 DEG C; 3) pickling, cold rolling and rolling with reductionratio of 70-78%; 4) annealing, heating to the temperature of 800-1000 DEG C with speed of greater than or equal to 15 DEG C, insulating for 10s-25s. Under the prerequisite that the magnetic property is ensured, by adding favorable texture elements during the steel-making process, controlling the harmful elements, controlling the air cooling time during the hot rolling process and cooperating by high temperature reeling, the electrical steel production with low cost and high efficiency can be realized.

The invention belongs to the technical field of metallurgy, and particularly relates to a method for preparing high-magnetic-strength non-oriented silicon steel thin products on the basis of thin-strip casting. The method comprises the following steps: (1) smelting molten steel according to set ingredients, wherein the molten steel comprises the following ingredients in percentages by mass: less than or equal to 0.003% of C, 2.0-3.5% of Si, less than or equal to 0.01% of Mn, less than or equal to 0.003% of Al, 0.02-0.06% of P, less than or equal to 0.003% of S, and the balance of Fe and inevitable impurities; (2) carrying out thin-strip casting to obtain a cast strip; (3) carrying out hot rolling under the condition of an inert atmosphere; (4) reeling the cast strip after the cast strip is cooled to the temperature of 650 DEG C, removing iron oxide scale and then carrying out single-stage multi-pass cold rolling; and (5) carrying out continuous annealing on the cold rolled strip, coating the cold rolled strip with an insulating layer and then drying the insulating layer to obtain the high-performance non-oriented silicon steel thin products. The method is based on a thin-strip casting technology, the process is simplified, the production cost is reduced, and the magnetic performance of the non-oriented silicon steel thin finished products is improved.

The invention relates to a non-oriented electrical steel plate Which comprises the following components in percentage by mass: less than or equal to 0.0060 percent of C, 0.60 to 0.80 percent of Si, 0.20 to 0.40 percent of Mn, less than or equal to 0.10 percent of P, less than or equal to 0.0080 percent of S, 0.015 to 0.025 percent of Als, 0.001 to 0.002 percent of B, and the balance of Fe and unavoidable impurity elements. The production method comprises the following steps of smelting in a converter, argon blowing to steel ladle, RH vacuum treatment, refining of an LF furnace, continuous casting of a sheet billet, heat equalizing through a tunnel, fine rolling, cooling, coiling, acid pickling, cold rolling and continuous annealing. Compared with the prior art, the method is high in magnetic induction and low in iron loss. A manufacturing process for producing the non-oriented electrical steel plate by continuously casting and continuously rolling the sheet billet is provided for the first time, and the technical support is provided for production of a novel non-oriented electrical steel hot-rolling raw material with excellent environmental-protection performance by utilizing a sheet billet continuous-casting and continuous rolling production line.

The invention discloses a method for producing non-oriented electrical steel with high magnetic induction and low iron loss by a CSP process, and relates to a production method of non-oriented electrical steel. The method comprises the following steps that step A, smelting is carried out; step B, continuous casting is carried out; step C, heating is carried out; step D, hot continuous rolling is carried out; step E, pickling is carried out; step F, one-time cold rolling is carried out; step G, annealing is carried out; step H, secondary cold rolling is carried out; and step I, recrystallization and annealing are carried out. The purpose of the method is to overcome the defect of unqualified magnetic properties caused by too large cold rolling reduction rate in the process of producing non-oriented electrical steel by an existing CSP process, and the produced non-oriented electrical steel has excellent magnetic properties of high magnetic induction and low iron loss under the premise that the total pressure reduction rate of cold rolling is far greater than 85%.

The invention belongs to the technical field of metallurgy, and in particular relates to a method for preparing non-oriented electrical steel for a high-efficient motor via twin roll strip casting. The method comprises the following steps: firstly, smelting molten steel according to components; then controlling a pouring temperature within 1600 DEG C to 1540 DEG C; pouring the molten steel into a rotating steel roller through a tundish; rapidly solidifying and molding so as to obtain a casting strip; cooling the casting strip; rolling the casting strip at 500 DEG C to 700 DEG C; performing acid pickling on the casting strip; and then performing cold rolling and annealing on the casting strip, thereby obtaining the non-oriented electrical steel for the high-efficient motor. The crystallite grain dimensions and the structural components of the casting strip are controlled by virtue of the special advantages of a casting-rolling process, so that the crystallite grain dimensions and the favorable structural components of an annealing plate are fully improved. As a result, the magnetic property of the non-oriented electrical steel is improved.

The invention discloses non-oriented silicon steel for an efficient inverter compressor and a manufacturing method thereof, and belongs to the technical field of non-oriented silicon steel. The non-oriented silicon steel comprises the following chemical components in percentage by weight: less than or equal to 0.003% of C, 2.0%-2.7% of Si, 0.2%-0.5% of Mn, 0.2%-0.7% of Als, 0.06%-0.11% of Sn, lessthan or equal to 0.005% of S, less than or equal to 0.03% of P, less than or equal to 0.003% of N, less than or equal to 0.003% of Ti and the balance of Fe and inevitable impurities. The preparationprocess includes smelting, continuous casting, heating, hot rolling, normalizing pickling, cold rolling, annealing and coating. In the normalizing pickling process, the normalizing temperature is 880-940 DEG C, the normalizing time is 2-5 minutes, shot blasting treatment is carried out after normalizing to remove oxide scales on the surface of the strip steel, then hydrochloric acid is adopted forpickling, the pickling temperature is 75-90 DEG C, and it is ensured that the surface of the strip steel is cleaned up. The invention aims to overcome the defect of high iron loss of non-oriented silicon steel with high magnetic induction and magnetic property in the prior art, and can meet the requirements of low iron loss and high magnetic induction and magnetic property for the high-efficiencyinverter compressor.

The invention discloses a manufacturing method for high-magnetic induction low-cost 250 MPa cold-rolled magnetic pole steel. The manufacturing method comprises the steps as follows: heating a plate blank to be 1200-1260 DEG C and insulating; hotly rolling, wherein the final rolling temperature is 850-900 DEG C, the coiling temperature is 550-630 DEG C and a jet water cooling way is adopted as a cooling way; cooling to be 60-80 DEG C for acid washing, wherein an air cooling way is adopted as the cooling way; coldly rolling, wherein the cold rolling reduction rate is 50-75%; continuously annealing, wherein the temperature of an uniform heating section is 720-780 DEG C and the uniform heating time is 60-200 s; and flattening by a flattening elongation rate of 0.8-1.4% to prepare the 250 MPa cold-rolled magnetic pole steel. The produced magnetic pole steel has lower yield strength ReL of more than 250 MPa and magnetic induction strength B50 of more than 1.70 T, and is suitable for manufacturing a magnetic pole iron core of a rotor body of a large water-wheel generator.

A manufacture process of non-oriented silicon steel with high magnetic induction includes smelting and casting steel having a chemical composition by weight percent: Si 0.1˜1%, Al 0.005˜1.0%, C≦0.004%, Mn=0.10˜1.50%, P≦0.2%, S≦0.005%, N≦0.002, Nb+V+Ti≦0.006%, and the rest is Fe. The steel is cast into a billet, which is heated and hot-rolled to 1150˜1200° C. into a plate at a finish-rolling temperature 830˜900° C. The plate is cooled to a temperature ≧570° C. and cold-roll flattened at compression ratio 2˜5%. The flattened plate is normalized at temperature not below 950° C. for 30˜180s, and then pickled and cold-rolled into a sheet with thickness of the finished product. The sheet is finish-annealed quickly heating the sheet to 800˜1000° C. at temperature rise rate ≧100° C./s, soaking the heated sheet for 5˜60s at the temperature, and then slowly cooling the sheet to 600˜750° C.