Abstract: A non-oriented electrical steel strip or sheet having the following composition, in percent by weight: 3.2 to 3.4 of Si, 0.85 to 1.1 of Al, 0.07 to 0.18 of Mn, 0.01 to 0.04 of P, 0.0003 to 0.0030 of S, 0.0005 to 0.0020 of N, 0.0010 to 0.0050 of C, 0.0015 to 0.0040 of Ti, 0.01 to 0.008 of Cr, up to 0.05 in total of Nb+Mo+V, balance Fe and unavoidable impurities up to a total amount of 1.0% and having a specific electrical resistance at 50° C. of 0.62 to 0.65??m. Also, a process for the production thereof and the use thereof in iron cores of rotating electric machines, in particular in electric motors, for example in electric vehicles or hybrid vehicles, and generators.

Abstract: Vibration of an iron core is reduced to reduce transformer noise. An iron core for a transformer comprises a plurality of grain-oriented electrical steel sheets stacked together, wherein at least one of the plurality of grain-oriented electrical steel sheets: (1) has a region in which closure domains are formed in a direction crossing a rolling direction and a region in which no closure domains are formed; (2) has an area ratio R0 of 0.10% to 3.0%, the area ratio R0 being defined as a ratio of S0 to S; and (3) has an area ratio R1a of 50% or more, the area ratio R1a being defined as a ratio of S1a to S1.

Abstract: The iron alloy particle is a particle including an iron alloy, and the particle includes: multiple mixed-phase particles, each including nanocrystals of 10 nm or more and 100 nm or less (i.e., from 10 nm to 100 nm) in crystallite size and an amorphous phase; and a grain boundary layer between the mixed-phase particles.

Abstract: A method for manufacturing a powder magnetic core, the method including: forming a soft magnetic powder (SMP) layer by putting an SMP having a surface on which an insulating coating film is formed into a space surrounded by a lower punch and a die; forming a pressed powder by compressing the SMP layer in the die by the lower punch and an upper punch; and causing the pressed powder and the die to slide relative to each other and then removing the pressed powder from the die is provided. In forming the SMP layer, a different powder different from the SMP is put into the space before and after the SMP is put into the space and a different powder layer having a spring back rate higher than that of the SMP layer by 0.6-1.1% is formed on upper and lower sides of the SMP layer.

Abstract: A fuel system, comprising at least one fuel component formed of a steel alloy comprising 0.01-0.31 wt. % carbon, 0.0-0.20 wt. % silicon, 0.15-0.50 wt. % manganese, 0.0-0.015 wt. % phosphorous, 0.0-0.001 wt. % sulfur, 4.80-5.20 wt. % chromium, 4.80-6.20 wt. % nickel, 0.60-0.80 wt. % molybdenum, 0.0-0.550 wt. % vanadium, and 2.000-2.400 wt. % aluminum, wherein the at least one fuel component is configured to come in contact with fuel when fuel is ran through the fuel system.

Abstract: A method for producing soft magnetic metal powder includes: a raw material powder preparing step of preparing metal raw material powder having metal raw material particles including iron, silicon, and boron; a mixture step of mixing the metal raw material powder and a carbon source substance and obtaining mixed powder; and a heat treatment step of performing heat treatment on the mixed powder in a non-oxidizing atmosphere containing nitrogen at a heat treatment temperature of 1,250° C. or higher and making the metal raw material particles spherical.

Abstract: The invention relates to a non-grain-oriented electrical steel strip or sheet, in particular for electrical applications, an electrical component produced from such an electrical steel strip or sheet, a process for producing an electrical steel strip or sheet and the use of such an electrical steel strip or sheet in components for electrical applications.

Abstract: Disclosed is a magnetic field shielding unit for wireless power transmission. The magnetic field shielding unit for wireless power transmission includes a magnetic shielding layer formed of ferrite fragments containing magnesium oxide (MgO) shredded to improve flexibility of the magnetic field shielding unit. The ferrite containing magnesium oxide has a real part (??) of the complex permeability of 650 or more at a frequency of 100 kHz. Accordingly, it is possible to prevent influence of a magnetic field on components of a mobile terminal device or a body of a user who uses the same, and to further increase the characteristics of the combined antennas even if the magnetic field shielding unit is combined with various kinds and purposes of antennas having various structures, shapes, sizes and intrinsic characteristics (inductance, resistivity, etc.).

Abstract: A threaded joint for pipes disclosed herein includes a pin and a box. The pin and the box each include a contact surface including a threaded portion and a metal contact portion. The threaded joint for pipes includes a solid lubricant coating on at least one of the contact surfaces of the pin and the box, the solid lubricant coating including a binder, a lubricant additive, an anti-rust additive, and a plasticizer.

Abstract: In a grain-oriented electrical steel sheet, comprising magnetic domains refined by a plurality of linear grooves in a surface of a steel sheet, each of the linear grooves is provided on its floor with a plurality of recessed parts aligned in a direction in which the linear groove extends, at a predetermined interval p (?m), and the recessed part is made to have a predetermined depth d (?m). In this way, it is possible to provide a grain-oriented electrical steel sheet having further improved iron loss properties while having reduced magnetic flux density reduction.

Abstract: The steel material for a soft magnetic part according to the present invention has a chemical composition consisting of, in mass %, C: 0.02 to 0.13%, Si: 0.005 to 0.50%, Mn: 0.10 to 0.70%, P: 0.035% or less, S: 0.050% or less, Al: 0.005 to 1.300%, V: 0.02 to 0.50%, and N: 0.003 to 0.030%, with the balance being Fe and impurities. The average grain diameter of ferrite grains in the steel material for a soft magnetic part ranges from 5 to 200 ?m. Further, in the ferrite grains, the number Sv (number/mm2) of precipitates having a circle-equivalent diameter of 30 nm or more satisfies Formula (1): Sv?10V×7.0×106??(1) where the V content (mass %) in the steel material for a soft magnetic part is substituted into V in Formula (1).

Abstract: Bulk metallic glass sheets and parts fabricated from individual bulk metallic glass fibers and tows are provided. Bulk metallic glass fibers and tows are used to prepare complex weave designs having desired thickness and fiber orientation for a particular use of a BMG feedstock. Appropriately designed bulk metallic glass weaves can be thermoplastically heated to form sheets and feedstock for parts having desired wall thickness and area coverage.

Abstract: A semiconductor device including a semiconductor element and a first member is provided. The first member includes a first magnetic planar region separated from the semiconductor element in a first direction, and a first nonmagnetic planar region provided between the first magnetic planar region and the semiconductor element in the first direction. At least a portion of the first magnetic planar region includes Fe100-x1-x2?x1Nx2, where ? includes at least one selected from the group consisting of Zr, Hf, Ta, Nb, Ti, Si, and Al, x1 is not less than 0.5 atomic percent and not more than 10 atomic percent, and x2 is not less than 0.5 atomic percent and not more than 8 atomic percent.

Abstract: A fuel injection valve includes a housing with a cavity, a valve needle, an actuator including a magnetic coil arranged in a coil casing, and an armature in the cavity. The housing includes a separation ring positioned between the armature and the coil casing and configured to lead the electromagnetic flux to the armature. The separation ring includes a first part and a second part. The first part is made of a first material and the second part is made of second material that differs from the first material. The first material and the second material are magnetic materials.

Abstract: A grain-oriented magnetic steel sheet includes grooves each of which extends in a direction intersecting a transportation direction, the grooves being formed at predetermined pitches PL in the transportation direction by laser beam irradiation, in which a relationship between a standard deviation value D and the pitch PL satisfies the following expression (1), the standard deviation value D being a standard deviation of distances between a linear approximation line, which is obtained from a center line of each of the grooves in a groove width direction by a least-squares method, and respective positions on the center line, and an average angle formed between tangent lines of the respective positions on the center line and a direction perpendicular to the transportation direction is more than 0° to 30°. [Expression 1] 0.

Abstract: The present invention discloses a method for fabricating a porous spherical iron-based alloy powder, a powder thereof and a sintered body thereof. The method comprises steps: mixing an iron oxide powder and an alloying powder to form a mixed powder; spray-granulating the mixed powder to form a spherical spray-granulated powder; and placing the spherical spray-granulated powder in a reducing environment and heating it to a temperature of lower than 700° C. to obtain a porous spherical iron-based alloy powder having high flowability, high compressibility, superior sinterability and low cost.

Abstract: A grain-oriented electrical steel sheet to which electron beam irradiation is applied, has a film and a thickness of t (mm), wherein no rust is produced on a surface of the steel sheet after a humidity cabinet test lasting 48 hours at a temperature of 50° C. in an atmosphere of 98% humidity, and iron loss W17/50 after the electron beam irradiation is reduced by at least (?500 t2+200 t?6.5) % of the iron loss W17/50 before the electron beam irradiation and is (5 t2?2 t+1.065) W/kg or less.

Abstract: The present invention provides iron powder for dust cores that has excellent compressibility and low iron loss after formation. In the iron powder for dust cores, Si content is 0.01 mass % or less, apparent density is 3.8 g/cm3 or more, the ratio of iron powder particles with a particle size of 45 ?m or less is 10 mass % or less, the ratio of iron powder particles with a particle size of over 180 ?m and 250 ?m or less is less than 30 mass %, the ratio of iron powder particles with a particle size of over 250 ?m is 10 mass % or less, and the Vickers hardness (test force: 0.245 N) of a powder cross-section is 80 Hv or less.

Abstract: The invention provides a nanocomposite magnet, which has achieved high coercive force and high residual magnetization. The magnet is a non-ferromagnetic phase that is intercalated between a hard magnetic phase with a rare-earth magnet composition and a soft magnetic phase, wherein the non-ferromagnetic phase reacts with neither the hard nor soft magnetic phase. A hard magnetic phase contains Nd2Fe14B, a soft magnetic phase contains Fe or Fe2Co, and a non-ferromagnetic phase contains Ta. The thickness of the non-ferromagnetic phase containing Ta is 5 nm or less, and the thickness of the soft magnetic phase containing Fe or Fe2Co is 20 nm or less. Nd, or Pr, or an alloy of Nd and any one of Cu, Ag, Al, Ga, and Pr, or an alloy of Pr and any one of Cu, Ag, Al, and Ga is diffused into a grain boundary phase of the hard magnetic phase of Nd2Fe14B.

Abstract: A process for the manufacture of magnetic ceramic is provided including the steps of: die compacting a powder composition into a compacted body, the composition including a mixture of soft magnetic, iron or iron-based powder, core particles of which are surrounded by an electrically insulating, inorganic coating an amount of 1 to 35% by weight of the composition; and heating and pressing the compacted body in an atmosphere to a temperature and a pressure below the decomposition temperature and pressure of the magnetic, iron or iron-based powder.

Abstract: A semi-hard magnetic material that is formed with equal to or more than 5.0% but less than 13.0% of Ni by mass, equal to or more than 0.5% but equal to or less than 4.0% of Mn by mass, more than 0% but equal to or less than 3.0% of Al by mass, more than 0% but equal to or less than 1.0% of Ti by mass and a remainder of Fe and an impurity, that has a coercivity of 1000 to 2400 A/m and that has a residual magnetic flux density of 1.3 T or more. A method of manufacturing the above semi-hard magnetic material wherein the material is a thin plate having a thickness of 0.030 to 0.30 mm and, after a cold rolling, performing an aging treatment on the thin plate at a temperature of 520° C. to 680° C.

Abstract: A magnetic component having intermixed first and second regions, and a method of preparing that magnetic component are disclosed. The first region includes a magnetic phase and the second region includes a non-magnetic phase. The method includes mechanically masking pre-selected sections of a surface portion of the component by using a nitrogen stop-off material and heat-treating the component in a nitrogen-rich atmosphere at a temperature greater than about 900° C. Both the first and second regions are substantially free of carbon, or contain only limited amounts of carbon; and the second region includes greater than about 0.1 weight % of nitrogen.

Abstract: A grain-oriented magnetic steel sheet includes grooves each of which extends in a direction intersecting a transportation direction, the grooves being formed at predetermined pitches PL in the transportation direction by laser beam irradiation, in which a relationship between a standard deviation value D and the pitch PL satisfies the following expression (1), the standard deviation value D being a standard deviation of distances between a linear approximation line, which is obtained from a center line of each of the grooves in a groove width direction by a least-squares method, and respective positions on the center line, and an average angle formed between tangent lines of the respective positions on the center line and a direction perpendicular to the transportation direction is more than 0° to 30°. [Expression 1] 0.

Abstract: Disclosed is a grain-oriented electrical steel sheet exhibiting low hysteresis loss and low coercive force, in which an increase in hysteresis loss due to laser irradiation or electron beam irradiation, which has been a conventional concern, is effectively inhibited. The grain-oriented electrical steel sheet has closure domain regions (X) formed to divide the magnetic domains in a rolling direction, from one end to the other in the width direction of the steel sheet, provided that Expression (1) is satisfied: ?(500t?80)×s+230?w??(500t?80)×s+330??Expression (1), where t represents a sheet thickness (mm); w represents a smaller one of the widths (?m) of the regions measured on the front and rear surfaces of the steel sheet, respectively, by using a Bitter method; and s represents an average number of the regions present within one crystal grain.

Abstract: Disclosed herein are a soft magnetic metal powder having a pearlite lamellar structure in which ferrite structures and cementite structures are repeated, a method for preparing the same, and an electronic component including the same as a core material. According to the present invention, the soft magnetic metal powder having the pearlite lamellar structure in which the ferrite structures and the cementite structures are repeated may be easily prepared, and an eddy current loss may be easily decreased without changing the existing molding process, such that the soft magnetic metal powder may be used as a core material of various electronic components such as an inductor, a motor, an actuator, a sensor, a transformer, and a reactor, requiring soft magnetic properties.

Abstract: A grain-oriented electrical steel sheet produces reduced noise when worked into a transformer, by setting length d of each plastic strain region in the widthwise direction of the steel sheet to 0.05 mm or more and 0.4 mm or less, and a ratio (?d/?w) of a total ?d of the length d to a total ?w of application interval w of each of the above plastic strain regions to 0.2 or more and 0.6 or less.

Abstract: The present invention proposes a method that can reduce the noise generated by a transformer core and the like when formed by laminations of a grain-oriented electrical steel sheet in which core loss has been reduced by a magnetic domain refinement process. In this steel sheet, linear distortion extending with an orientation in which an angle formed with a direction perpendicular to the rolling direction of the steel sheet is an angle of 30° or less is periodic in the direction of rolling of the steel sheet, core loss (W17/50) is 0.720 W/kg or less, and magnetic flux density (B8) is 1.930 T. The volume of the closure domain arising in the distortion part is 1.00-3.00% of the total magnetic domain volume within the steel sheet.

Abstract: A grain-oriented electrical steel sheet allows for manufacture of a transformer that exhibits, when the steel sheet is applied to an iron core thereof, extremely low iron loss and extremely low noise properties, makes highly efficient use of energy, and can be used in various environments. The grain-oriented electrical steel sheet has a strain distribution in regions where closure domains are formed, when observed in a cross section in the rolling direction, with a maximum tensile strain in a sheet thickness direction being 0.45% or less, and with a maximum tensile strain t (%) and a maximum compressive strain c (%) in the rolling direction satisfying Expression (1): t+0.06?t+c?0.35??(1).

Abstract: A process for producing grain oriented magnetic sheets by subjecting a steel slab ?100 mm, containing 2.5-3.5% si, to the following operations: optional first heating, to a temperature T1?1250° C.; first rough hot-rolling at T2 between 900 and 1200° C., the reduction ratio (% Rid) being at least 80% in the absence of a subsequent heating or, in the presence of a subsequent heating to T3?1300° C., at least 60% determined by % Rid=80?(T3?T2)/5; second finishing hot-rolling at T4<1300° C. to a rolled-section thickness of 1.5 3.0 mm; cold-rolling, in one or more stages with optional intermediate annealing and with a cold reduction ratio ?60% applied in the last stage; primary recrystallization annealing, optionally in a decarburizing atmosphere; second recrystallization annealing.

Abstract: A process for producing an ordered martensitic iron nitride powder that is suitable for use as a permanent magnetic material is provided. The process includes fabricating an iron alloy powder having a desired composition and uniformity; nitriding the iron alloy powder by contacting the material with a nitrogen source in a fluidized bed reactor to produce a nitride iron powder; transforming the nitride iron powder to a disordered martensitic phase; annealing the disordered martensitic phase to an ordered martensitic phase; and separating the ordered martensitic phase from the iron nitride powder to yield an ordered martensitic iron nitride powder.

Abstract: A method for producing a magnetizable metal shaped body comprising a ferromagnetic starting material that is present in powder and in particulate form, using the following steps: (a) first compaction of the starting material (S3) such that adjoining particles become bonded to each other by means of positive adhesion and/or integral bonding in sections along the peripheral surfaces thereof and while forming hollow spaces, (b) creating an electrically isolating surface coating on the peripheral surfaces of the particles in regions outside the joining sections (S4), and (c) second compaction of the particles (S5) provided with the surface coating, such that the hollow spaces are reduced in size or eliminated.

Abstract: New magnetic materials containing cerium, iron, and small additions of a third element are disclosed. These materials comprise compounds Ce(Fe12?xMx) where x=1-4, having the ThMn12 tetragonal crystal structure (space group I4/mmm, #139). Compounds with M=B, Al, Si, P, S, Sc, Co, Ni, Zn, Ga, Ge, Zr, Nb, Hf, Ta, and W are identified theoretically, and one class of compounds based on M=Si has been synthesized. The Si cognates are characterized by large magnetic moments (4?Ms greater than 1.27 Tesla) and high Curie temperatures (264?Tc?305° C.). The Ce(Fe12?xMx) compound may contain one or more of Ti, V, Cr, and Mo in combination with an M element. Further enhancement in Tc is obtained by nitriding the Ce compounds through heat treatment in N2 gas while retaining the ThMn12 tetragonal crystal structure; for example CeFe10Si2N1.29 has Tc=426° C.

Abstract: Provided is a soft magnetic powder used for obtaining a dust core having a low hysteresis loss, in particular, in a high temperature range. A soft magnetic powder includes an aggregate of composite magnetic particles, each including a soft magnetic particle containing Fe, Si, and Al, and an insulating coating film disposed on the surface thereof, and satisfies the expressions (1) and (2) below: Expression (1) . . . 27?2.5a+b?29 and Expression (2) . . . 6?b?9, where a represents the Si content (mass %) and b represents the Al content (mass %). The soft magnetic powder is capable of reducing the hysteresis loss, in a high-temperature environment, of a dust core obtained using the soft magnetic powder.

Abstract: A grain oriented electrical steel sheet has linear grooves for magnetic domain refinement formed on a surface thereof and may reduce iron loss by using these linear grooves, where the proportion of those linear grooves having crystal grains directly beneath themselves, each crystal grain having an orientation deviating from the Goss orientation by 10° or more and a grain size of 5 ?m or more, is controlled to 20% or less, and secondary recrystallized grains are controlled to have an average ? angle of 2.0° or less, and each secondary recrystallized grain having a grain size of 10 mm or more is controlled to have an average ?-angle variation of 1° to 4°.

Abstract: A method of producing a hot press-formed member having good corrosion resistance comprises subjecting a zinc-based plated steel sheet to heat treatment by heating to a temperature region of 600-750° C. at a rate of temperature increase up to 600° C. of at most 50° C. per second followed by cooling to 550° C. or below to form a steel blank which has a zinc oxide layer in its uppermost surface portion and below it a zinc-iron alloy phase having an Fe content of at least 25 mass %. This steel blank is heated to a temperature of at least its Ac3 point, then press formed immediately at a temperature of at least its Ac3 point, and then rapidly cooled. The hot press-formed member has a surface region with zinc oxide and iron-zinc solid solution phases and not containing an intermetallic compound phase or a pure zinc phase.

Abstract: A resist film is formed on a cold-rolled steel sheet so as to fabricate a groove by etching. At this point, a steel sheet exposed portion where a portion of the steel sheet is exposed is formed in the resist film, and the steel sheet exposed portion has a first region oriented in a sheet width direction, and a plurality of second regions starting from the first region, widths of the first region and the second regions being 20 ?m to 100 ?m, and a distance from an end portion of one of the second regions to an end portion of another of the second regions adjacent thereto being 60 ?m to 570 ?m.

Abstract: An iron alloy according to the present invention comprises: Al in an amount of from 3 to 5.5%; Mn in an amount from 0.2 to 6%; and the balance being iron (Fe), and inevitable impurities and/or a modifying element; when the entirety is taken as 100%. Since a high damping factor is obtainable at a low-strain amplitude, this iron alloy demonstrates a stable damping property even in a high-temperature region. Moreover, since the alloying elements are Al and Mn alone, and since their contents are less, the iron alloy according to the present invention is low in cost.

Abstract: The present invention relates to ferromagnetic particles capable of exhibiting a high purity and excellent magnetic properties from the industrial viewpoints and a process for producing the ferromagnetic particles, and also provides an anisotropic magnet, a bonded magnet and a compacted magnet which are obtained by using the ferromagnetic particles.

Abstract: A rapidly quenched Fe-based soft-magnetic alloy ribbon having wave-like undulations on a free surface, the wave-like undulations having transverse troughs arranged at substantially constant intervals in a longitudinal direction, and the troughs having an average amplitude D of 20 mm or less, is produced by a method comprising (a) keeping a transverse temperature distribution in a melt nozzle within ±15° C. to have as small a temperature distribution as possible in a melt paddle of the alloy, and (b) forming numerous fine linear scratches on a cooling roll surface by a wire brush, thereby providing a ground surface of the cooling roll with an arithmetical mean (average) roughness Ra of 0.1-1 ?m and a maximum roughness depth Rmax of 0.5-10 ?m.

Abstract: The present disclosure is directed to a method of shaping a starting material of polycrystalline Fe—Ga alloy sheet of varying texture or crystal orientation. The method includes texturing the surface of the Fe—Ga alloy sheet to re-orient polycrystalline Fe—Ga crystals of the polycrystalline Fe—Ga alloy sheet to increase the uniformity of the crystal orientation of the Fe—Ga alloy sheet. The texturing step includes: initially deforming the Fe—Ga alloy sheet by hot rolling; subsequently deforming the previously hot rolled Fe—Ga alloy sheet by warm rolling; and annealing the previously warm rolled Fe—Ga alloy sheet. The method provides an alloy having a saturation magnetostriction potential greater than 60 ppm in applied fields of between 200-600 Oersted. During the annealing step H2S gas is added to introduce sulfur for promoting surface-energy-induced selective growth of {110} grain. The annealing step is performed in an atmosphere of argon gas.

Abstract: A high coercivity bias piece for making acousto-magnetic labels is made of an alloy strip with 10-14% weight percent Mn, less than 7% weight percent of one or more other transitional metals, with the balance Fe, after cold rolling to final gage, going through a final aging heat treatment at below 590 C, longer than 5 minutes. The strip thickness is 0.065-0.18 mm with coercivity measured by direct current method being 56-90 Oe. The method of making the high coercivity bias piece is to cold roll the strip to 0.07-0.15 mm with aging temperature at 450-570 C, for 0.5-20 hours to form a magnetic strip with coercivity of 60-85 Oe, followed by cutting the strip to required size. This high coercivity bias piece is manufactured without expensive Co and Ni materials, showing that a low cost Fe-(10-14% weight percent Mn) based alloy can be used to make high coercivity bias.

Abstract: A grain oriented electrical steel sheet has thermal strain introduced thereinto in a dotted-line arrangement in which strain-imparted areas are lined in a direction that crosses a rolling direction of the steel sheet, wherein the strain-imparted areas introduced in the dotted-line arrangement have a size from 0.10 mm or more to 0.50 mm or less and an interval between the adjacent strain-imparted areas is from 0.10 mm or more to 0.60 mm or less.

Abstract: A grain oriented electrical steel sheet has linear grooves for magnetic domain refinement formed on a surface thereof and may reduce iron loss by using these linear grooves, where the proportion of those linear grooves having crystal grains directly beneath themselves, each crystal grain having an orientation deviating from the Goss orientation by 10° or more and a grain size of 5 ?m or more, is controlled to 20% or less, and secondary recrystallized grains are controlled to have an average ? angle of 2.0° or less, and each secondary recrystallized grain having a grain size of 10 mm or more is controlled to have an average ?-angle variation of 1° to 4°.

Abstract: A silicon steel sheet (1) containing Si is cold-rolled. Next, a decarburization annealing (3) of the silicon steel sheet (1) is performed so as to cause a primary recrystallization. Next, the silicon steel sheet (1) is coiled so as to obtain a steel sheet coil (31). Next, an annealing (6) of the steel sheet coil (31) is performed through batch processing so as to cause a secondary recrystallization. Next, the steel sheet coil (31) is uncoiled and flattened. Between the cold-rolling and the obtaining the steel sheet coil (31), a laser beam is irradiated a plurality of times at predetermined intervals on a surface of the silicon steel sheet (1) from one end to the other end of the silicon steel sheet (1) along a sheet width direction (2). When the secondary recrystallization is caused, grain boundaries passing from a front surface to a rear surface of the silicon steel sheet (1) along paths of the laser beams are generated.

Abstract: The invention relates to an iron-based soft magnetic powder for a dust core, wherein a film comprising Fe and Co, a phosphoric acid-based chemical conversion film and a silicone resin film are formed in this order on the surface of an iron-based soft magnetic powder, and to a dust core obtained by molding the iron-based soft magnetic powder for a dust core. The invention also relates to an iron-based soft magnetic powder for a dust core formed by coating the surface of an iron-based soft magnetic powder with an insulating film, wherein the powder has a particle diameter of from 45 ?m to 180 ?m, the insulating film is composed of two layers in which a lower layer composed of a phosphoric acid-based chemical conversion film and an upper layer composed of a silicone resin film, and each of the films has a thickness of from 100 nm to 280 nm, and to a dust core obtained by molding the iron-based soft magnetic powder for a dust core.

Abstract: A powder mixture, which contains a soft magnetic powder and an insulating powder lubricant in an amount of 0.1% by mass or more relative to the soft magnetic powder, is formed by compacting at a compacting pressure of 800 MPa or less, thereby obtaining a powder compact that has a space factor of the soft magnetic powder of 93% or more. The powder compact can be used as a soft magnetic powdered core. The soft magnetic powdered core has a specific resistance or 10,000 ??cm or more. A powder of a metal soap such as barium stearate or lithium stearate is used as the insulating powder lubricant.

Abstract: Magnet cores pressed using a powder of nanocrystalline or amorphous particles and a pressing additive should be characterized by minimal iron losses. These particles have first surfaces represented by the original strip surfaces and second surfaces represented by surfaces produced in a pulverization process, the overwhelming majority of these second particle surfaces being smooth cut or fracture surfaces without any plastic deformation, the proportion T of areas of plastic deformation of the second particle surfaces being 0?T?0.5.

Abstract: The invention can provide a dust core that can counteract a large electric current, achieve an increase in frequency and miniaturization, and achieve an improvement in voltage resistance, and a magnetic element using the same. The dust core of the invention is a dust core including metallic magnetic powder, an inorganic insulating material, and a thermosetting resin, in which the metallic magnetic powder has a Vickers hardness (Hv) in a range of 230?Hv?1000, the inorganic insulating material has a compressive strength of 10000 kg/cm2 or lower and is in a mechanical collapse state, and the inorganic insulating material in a mechanical collapse state and the thermosetting resin are interposed between the metallic magnetic powder particles.

Abstract: A method for ordering a disordered alloy includes: simultaneously ion bombarding and annealing a disordered alloy to transform the disordered alloy from a disordered crystalline state to an ordered crystalline state. A method for making a perpendicular magnetic recording medium which includes an ordered alloy layer is also disclosed.

Abstract: A powder for a dust core comprising a silicon-containing layer formed within a depth of less than 0.15 D from the surface of the surface layer of a soft magnetic metal powder having a particle diameter D and a method for producing the same are provided.