Abstract: In a method for producing a grain-oriented electrical steel sheet by hot rolling a steel slab comprising C: 0.04-0.12 mass %, Si: 1.5-5.0 mass %, Mn: 0.01-1.0 mass %, sol. Al: 0.010-0.040 mass %, N: 0.004-0.02 mass %, one or two of S and Se: 0.005-0.05 mass % in total of S and Se, cold rolling, and subjecting to primary recrystallization annealing and further to final annealing, a content ratio of sol. Al to N in the steel slab (sol. Al/N) and a final thickness d (mm) satisfy an equation of 4d+1.52?sol. Al/N?4d+2.32, and the steel sheet in the heating process of the final annealing is held at a temperature of 775-875° C. for 40-200 hours and then heated in a temperature region of 875-1050° C. at a heating rate of 10-60° C./hr to preform secondary recrystallization and purification treatment, whereby an extremely-thin grain-oriented electrical steel sheet having a low iron loss and a small deviation in coil is produced.

Abstract: To provide a rare earth magnet ensuring excellent magnetic anisotropy while reducing the amount of Nd, etc., and a manufacturing method thereof. A rare earth magnet comprising a crystal grain having an overall composition of (R2(1-x)R1x)yFe100-y-w-z-vCowBzTMv (wherein R2 is at least one of Nd, Pr, Dy and Tb, R1 is an alloy of at least one or two or more of Ce, La, Gd, Y and Sc, TM is at least one of Ga, Al, Cu, Au, Ag, Zn, In and Mn, 0<x<1, y=12 to 20, z=5.6 to 6.5, w=0 to 8, and v=0 to 2), wherein the average grain size of the crystal grain is 1,000 nm or less, the crystal grain consists of a core and an outer shell, the core has a composition of R1 that is richer than R2, and the outer shell has a composition of R2 that is richer than R1.

Abstract: A thick-wall oil-well steel pipe has a wall thickness of 40 mm or more, excellent SSC resistance and high strength. The thick-wall oil-well steel pipe has a composition containing, in mass %, C: 0.40 to 0.65%, Si: 0.05 to 0.50%, Mn: 0.10 to 1.0%, P: 0.020% or less, S: 0.0020% or less, sol. Al: 0.005 to 0.10%, Cr more than 0.40 to 2.0%, Mo: more than 1.15 to 5.0%, Cu: 0.50% or less, Ni: 0.50% or less, N: 0.007% or less, and O: 0.005% or less. The number of carbide which has a circle equivalent diameter of 100 nm or more and contains 20 mass % or more of Mo is 2 or less per 100 mm2. The thick-wall oil-well steel pipe has yield strength of 827 MPa or more. A difference between a maximum value and a minimum value of the yield strength in the wall-thickness direction is 45 MPa or less.

Abstract: A step of, while an RLM alloy powder (where RL is Nd and/or Pr; M is one or more elements selected from among Cu, Fe, Ga, Co, Ni and Al) and an RH compound powder (where RH is Dy and/or Tb; and the RH compound is an RH fluoride and/or an RH oxyfluoride) are present on the surface of a sintered R-T-B based magnet, performing a heat treatment at a sintering temperature of the sintered R-T-B based magnet or lower is included. The RLM alloy contains RL in an amount of 50 at % or more, and the melting point of the RLM alloy is equal to or less than the temperature of the heat treatment. The heat treatment is performed while the RLM alloy powder and the RH compound powder are present on the surface of the sintered R-T-B based magnet at a mass ratio of RLM alloy:RH compound=9.6:0.4 to 5:5.

Abstract: An R-T-B based sintered magnet has excellent corrosion resistance together with good magnetic properties. The R-T-B based sintered magnet contains R2T14B grains, wherein, an R—Cu-M-C concentrated part is existed in a grain boundary formed between or among two or more adjacent R2T14B grains, and the concentrations of R (R is at least one from Sc, Y and the lanthanoide element), Cu, M (M is at least one from Ga, Si, Sn, Ge and Bi) and C in the R—Cu-M-C concentrated part are higher than those in the R2T14B grains respectively.

Abstract: A step of, while an RLM alloy powder (where RL is Nd and/or Pr; M is one or more elements selected from among Cu, Fe, Ga, Co, Ni and Al) and an RH oxide powder (where RH is Dy and/or Tb) are present on the surface of a sintered R-T-B based magnet, performing a heat treatment at a sintering temperature of the sintered R-T-B based magnet or lower is included. The RLM alloy contains RL in an amount of 50 at % or more, and the melting point of the RLM alloy is equal to or less than the temperature of the heat treatment. The heat treatment is performed while the RLM alloy powder and the RH oxide powder are present on the surface of the sintered R-T-B based magnet at a mass ratio of RLM alloy:RH oxide=9.6:0.4 to 5:5.

Abstract: The present invention provides a magnetic core which can be produced with improved productivity without increasing a material cost and has required magnetic and mechanical properties and a process for producing the same. The magnetic core is produced by compression molding and thereafter thermally hardening iron-based soft magnetic powder having resin films formed on surfaces of particles thereof. The resin film is an uncured resin film formed by dry mixing the iron-based soft magnetic powder and epoxy resin containing a latent curing agent with each other at a temperature not less than a softening temperature of the epoxy resin and less than a thermal curing starting temperature thereof. The iron-based soft magnetic powder having the resin films formed on the surfaces of the particles thereof is compression molded by using a die to produce a compression molded body.

Abstract: This disclosure is directed to methods for creating recycled Nd—Fe—B type permanent magnets, the methods comprising homogenizing a first population of particles of a rare earth transitional elemental additive with a second population of particles of a magnetic material, wherein the nature of the rare earth transitional elemental additive and the magnetic material are described herein. Additional steps may include compressing the population of homogenized particles together to form a green body, and heating the green body at a temperature and for a time sufficient to sinter the green body into a sintered body. Compositions resulting from these methods are also within the scope of the disclosure.

Abstract: An R-T-B based sintered magnet includes R2T14B crystal grains. A grain boundary formed by the two or more adjacent R2T14B crystal grains includes an R—N—O—C concentrated part having higher concentrations of “R”, N, O, and C than those in the R2T14B crystal grains. “R” of the R—N—O—C concentrated part includes Y. A ratio of Y atom to “R” atom in the R—N—O—C concentrated part is 0.65 or more and 1.00 or less. A ratio of O atom to “R” atom in the R—N—O—C concentrated part is more than 0 and 0.20 or less. A ratio of N atom to “R” atom in the R—N—O—C concentrated part is 0.03 or more and 0.15 or less.

Abstract: The present invention provides an R-T-B based sintered magnet having an R-T-B based compound as main phase grains, wherein, the content of Zr contained in the R-T-B based sintered magnet is 0.3 mass % to 2.0 mass %, the main phase grains have Zr, and the R-T-B based sintered magnet have main phase grains with the mass concentration of Zr at the edge portion of the main phase grain being 70% or less of that at the central portion of the main phase grain at the cross-section of the main phase grain.

Abstract: There is provided a composite material containing magnetic powder and a polymeric material including the powder in a dispersion state, wherein a content of the magnetic powder with respect to the whole composite material is more than 50% by volume and 75% by volume or less, a saturation magnetic flux density of the composite material is 0.6 T or more, and a relative magnetic permeability of the composite material is more than 20 and is 35 or less. It is preferable that a density ratio of the magnetic powder should be 0.38 or more and 0.65 or less. The density ratio is set to be an apparent density/a true density. Moreover, it is preferable that the magnetic powder should include a plurality of particles constituted of the same material.

Abstract: The present invention provides a permanent magnet with a composition ratio of RXT(100-X-Y)CY having a main phase with Nd5Fe17 type crystal structure, wherein: R is one or more rare earth elements including Sm as a necessary element, and the rare earth elements are Sm, Y, La, Pr, Ce, Nd, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu; and T is one or more transition metal elements including Fe or a combination of Fe and Co as necessary elements; and 15<X<40, 5<Y<15, 1.5<(100-X-Y)/X<4.

Abstract: A magnet material of an embodiment includes a composition represented by a formula 1: (Fe1-x-yCoxTy)2(B1-aAa)b, and a metallic structure having a CuAl2 crystal phase as a main phase. T is at least one element selected from V, Cr, and Mn. A is at least one element selected from C, N, Si, S, P, and Al. An atomic ratio x of Co and an atomic ratio y of the element T satisfy 0.01?y?0.5 and x+y?0.5. When the element T includes at least one element selected from V and Cr, a total atomic ratio of V and Cr is 0.03 or more. When the element T includes Mn, an atomic ratio of Mn is 0.3 or less. An atomic ratio a of the element A satisfies 0?a?0.4. A total atomic ratio b of B and the element A satisfies 0.8?b?1.2.

Abstract: Provided is a lead-free solder alloy that has excellent tensile strength and ductility, does not deform after heat cycles, and does not crack. The In and Bi content are optimized and the Sb and Ni content are adjusted. As a result, this solder alloy has an alloy composition including, by mass, 1.0 to 7.0% of In, 1.5 to 5.5% of Bi, 1.0 to 4.0% of Ag, 0.01 to 0.2% of Ni, and 0.01 to 0.15% of Sb, with the remainder made up by Sn.

Abstract: Embodiments of the present invention provide a die casting aluminum alloy, including the following components in percentage by mass: 11.0% to 14.0% of silicon; 0.1% to 0.9% of manganese; 0.1% to 1.0% of magnesium; 0.3% to 1.4% of iron; less than or equal to 0.2% of copper; and aluminum and inevitable impurities. The die casting aluminum alloy has good formability, heat conductivity, and corrosion resistance, and certain mechanical properties, which can avoid problems of a low yield of die-casting fittings, burn-in caused by severe heat emission of a product, corrosion in a coastal environment, assembly difficulties caused by insufficient mechanical properties, severe deformation in a wind load condition, and the like, so as to satisfy requirements of global delivery of complex communications products.

Abstract: A rare earth permanent magnetic material contains a main phase of R1x1R2y1Fe1-x1-y1-z1-u1Coz1Bu1, and an auxiliary phase including a first auxiliary phase of R3x2R4y2Fe1-x2-y2-z2-u2-v1Coz2Bu2Mv1 and a second auxiliary of R5x3R6y3Fe1-x3-y3-z3-u3-v2Coz3Bu3Mv2. Each of R1, R3 and R5 is Pr and/or Nd. Each of R2, R4 and R6 is at least one of Dy, Tb and Ho. M is at least one of Zr, Ga, Cu, Nb, Sn, Mo, Al, V, W, Si, Hf, Ti, Zn, Bi, Ta and In. 26 wt %?x1+y1?34 wt %, 0.01 wt %?y1?4 wt %, 0?z1?6 wt %, and 0.78 wt %?u1?1.25 wt %. 35 wt %?x2+y2?82 wt %, 5 wt %?y2?42 wt %, 0?z2?40 wt %, 0?u2?1.25 wt %, and 0?v1?10 wt %. 10 wt %?x3+y3?32 wt %, 0?y3?4.8 wt %, 0?z3?40 wt %, 0?u3?1.25 wt %, and 31 wt %?v2?50 wt %.

Abstract: A method for producing a permanent magnet, comprising the step: (a) providing a powder of a magnetic material, (b) coating the powder particles with a coating of a diamagnetic or paramagnetic coating material, (c) compressing the coated particles to form a pressed part, (d) heat treatment to sinter the coating material at a temperature less than a temperature suitable for sintering the magnetic material, while the coating material transfers to a matrix of a diamagnetic or paramagnetic material, which embeds the particles of the magnetic material, and (e) magnetizing the magnetizable material in an external magnetic field, wherein the steps (c), (d) and (e) are carried out in any order successively or at the same time in any desired combination.

Abstract: A rare earth magnet molding (1) of the present invention includes rare earth magnet particles (2), and an insulating phase (3) present among the rare earth magnet particles. Segregation regions (4) in which at least one element selected from the group consisting of Dy, Tb, Pr and Ho is segregated are distributed in the rare earth magnet particles (2). Accordingly, the rare earth magnet molding that has excellent resistance to heat in motor environments or the like while maintaining high magnetic characteristics (coercive force) is provided.

Abstract: Process for treating a magnetic structure, wherein it comprises the following steps: providing a magnetic structure comprising one first layer of magnetic material comprising a CoFeB alloy; irradiating the magnetic structure with light low-energy ions; and simultaneously holding the magnetic structure with a preset temperature profile and for a preset time.

Abstract: In a manufacturing method of a soft magnetic member, a material powder that includes ferrous particles and an organic layer formed on a surface of each of the ferrous particles is prepared. The organic layer contains at least one element selected from the group consisting of Si, Mg, Ti, and V. The material powder is compacted to form a green compact, and the green compact is induction-heated with a frequency of 100 kHz or higher to form an insulation layer made of an oxide containing the element on the surface of each of the ferrous particles.