Disclosed are austenitic stainless steel that can exhibit high strength while having non-magnetic properties, and a manufacturing method thereof.

The high strength non-magnetic austenitic stainless steel according to an embodiment of present disclosure includes, in percent (%) by weight of the entire composition, C: 0.02 to 0.12%, Si: 1.2% or less, Mn: 0.5 to 2.0%, Cr: 17.0 to 22.0%, Ni: 11.0 to 15.0%, Mo: 3.0% or less, N: 0.25% or less, the remainder of iron (Fe) and other inevitable impurities, satisfies C+N: 0.25% or more, and satisfies following Formulas (1) and (2).

[{Cr+Mo+1.5*Si+18}/{Ni+30*(C+N)+0.5*Mn+36}+0.262]*161−161−log(cooling rate)<0  (1)

551−462*(C+N)−9.2*Si−8.1*Mn−13.7*Cr−29*Ni−18.5*Mo≤−200  (2)

Provided is an oriented electrical steel sheet including a groove existing on the surface of the electrical steel sheet and a forsterite layer formed on a part or all of the surface of the electrical steel sheet, in which forsterite which is extended from the forsterite layer and penetrates to a base steel sheet in an anchor form is present on the surface of the side of the groove.

A method for producing three-dimensional magnetic shields with a sufficient permeability from unannealed, soft-annealed, or magnetization annealed magnetically soft metal sheets, wherein the metal sheet is either cold formed into the three-dimensional component in a one-step or multi-step process, then is subjected to a (magnetization) annealing to increase the permeability, and is then transferred to a forming tool, in which it is held and/or pressed in a tool, which has the desired contour of the component, and is optionally shape-corrected or calibrated by the tool, and allowed to cool in the tool, or a sheet is heated and then formed to the desired geometry in a hot-forming tool and held in it, and is allowed to cool in the tool, or the three-dimensional component is generated by additive production and then is subjected to a (magnetization) annealing to increase the permeability; the invention also relates to a shielding device.

Multiple temperature-control process for stators (7) and rotors of electric motors and components consisting of materials with different magnetic properties by means of a triplex furnace (1) for the quick, efficient, and uniform heating-up of preferably tubular components such as stators (7), wherein the magnetic parts of a component are primarily heated up by means of induction and at the same time non-magnetic parts of the same component are primarily heated up by means of infrared radiation, and at the same time and subsequently secondary heating takes place by means of convection, in particular by passive heating elements (10), which serves for finely adjusting the target temperature and for maintaining it.

An Fe-based nanocrystalline soft magnetic alloy including an amorphous phase and crystal grains, wherein clusters are dispersed in the amorphous phase and the alloy has a composition represented by (Fe.sub.1-x-ySi.sub.xAl.sub.y).sub.100-a-b-cM.sub.aM′.sub.bCu.sub.c (M represents one or more elements selected from the group consisting of Nb, W, Zr, Hf, Ti and Mo; M′ represents one or more elements selected from the group consisting of B, C and P; a, b and c represent 2.0≤a≤5.0, 3.0<b<10.0 and 0<c<3.0, each in atomic %; and x and y represent 0.150≤x≤0.250 and 0.012≤y≤0.100 and satisfy 0.190≤x+y≤0.290).

A grain oriented electrical steel sheet includes the texture aligned with Goss orientation. In the grain oriented electrical steel sheet, when (α.sub.1 β.sub.1 γ.sub.1) and (α.sub.2 β.sub.2 γ.sub.2) represent deviation angles of crystal orientations measured at two measurement points which are adjacent on the sheet surface and which have an interval of 1 mm, the boundary condition BA is defined as |γ.sub.2−γ.sub.1|≥0.5°, and the boundary condition BB is defined as [(α.sub.2−α.sub.1).sup.2+(β.sub.2−β.sub.1).sup.2+(γ.sub.2−γ.sub.1).sup.2].sup.1/2≥2.0°, the boundary which satisfies the boundary condition BA and which does not satisfy the boundary condition BB is included.

A non oriented electrical steel sheet includes, as a chemical composition, by mass %, 1.0% or more and 5.0% or less of Si, wherein a sheet thickness is 0.10 mm or more and 0.35 mm or less, an average grain size is 30 μm or more and 200 μm or less, an X1 value defined by X1=(2×B.sub.50L+B.sub.50C)/(3×I.sub.S) is less than 0.845, an E1 value defined by E1=E.sub.L/E.sub.C is 0.930 or more, and an iron loss W.sub.10/1k is 80 W/kg or less.

A grain-oriented electrical steel sheet according to the present invention includes a silicon steel sheet as a base steel sheet, and when an average value of amplitudes in a wavelength range of 20 to 100 μm among wavelength components obtained by performing Fourier analysis on a measured cross-sectional curve parallel to a sheet width direction of the silicon steel sheet is set as ave-AMP.sub.C100, ave-AMP.sub.C100 is 0.0001 to 0.050 μm.

Disclosed are an amorphous nanocrystalline soft magnetic material, a preparation method therefor and an application thereof, an amorphous ribbon material, an amorphous nanocrystalline ribbon material, and an amorphous nanocrystalline magnetic sheet. The soft magnetic material comprises an amorphous matrix phase, a nanocrystalline phase distributed in the amorphous matrix phase, and fine crystalline particles distributed in the amorphous matrix phase and the nanocrystalline phase. The amorphous matrix phase comprises Fe, Si, and B, the fine crystalline particles comprise metal carbides, and the soft magnetic material comprises Fe, Si, B, P, and Cu.

A grain-oriented electrical steel sheet according to an embodiment of the present invention includes: Si at 2.0 to 6.0 wt%, Mn at 0.12 to 1.0 wt%, Sb at 0.01 to 0.05 wt%, Sn at 0.03 to 0.08 wt%, Cr at 0.01 to 0.2 wt%, and the balance of Fe and inevitable impurities, and satisfies Formula 1 below.

4×[Cr]−0.1×[Mn]≥0.5×([Sn]+[Sb])   [Formula 1]

(In Formula 1, [Cr], [Mn], [Sn], and [Sb] represent contents (wt%) of Cr, Mn, Sn, and Sb, respectively.)