A soft magnetic alloy thin strip which has high saturation magnetic flux density and low coercivity, which enables a core with high space factor and high saturation magnetic flux density. A soft magnetic alloy thin strip including a main component that has a composition formula (Fe.sub.(1−(α+β))X1.sub.αX2.sub.β).sub.(1−(a+b+c+d+e+f))M.sub.aB.sub.bP.sub.cSi.sub.dC.sub.eS.sub.f. In the formula, X1, X2 and M are selected from a specific element group; 0≤a≤0.140, 0.020≤b≤0.200, 0≤c≤0.150, 0≤d≤0.090, 0≤e≤0.030, 0≤f≤0.030, α≥0, β≥0, and 0≤α+β≤0.50; and at least one of a, c and d is larger than 0. The strip has a structure that is composed of an Fe-based nanocrystal; and the surface roughness of a release surface satisfies 0.85≤Ra.sub.e/Ra.sub.c≤1.25 (wherein Ra.sub.c is the average of arithmetic mean roughnesses in the central portion, and Ra.sub.e is the average in the edge portion).

The present invention relates to a wire rod of which softening heat treatment can be omitted, and a manufacturing method therefor. One embodiment of the present invention provides a wire rod of which softening heat treatment can be omitted, and a manufacturing method therefor, the wire rod comprising, by wt %, 0.2-0.45% of C, 0.02-0.4% of Si, 0.3-1.5% of Mn, 0.3-1.5% of Cr, 0.02-0.05% of Al, 0.01-0.5% of Mo, 0.01% or less of N, and the balance of Fe and other inevitable impurities, and having a microstructure consisting of, by area %, 40% or more of proeutectoid ferrite based on an equilibrium phase, 40% or more of regenerated pearlite and bainite, and 20% or less of martensite, and wherein the colony average size of the pearlite in the region amounting to ⅖ to ⅗ of the diameter is 5 μm or less.

A method, system, and apparatus for fabricating a high-strength Superconducting cable comprises pre-oxidizing at least one high-strength alloy wire, coating at least one Superconducting wire with a protective layer, and winding the high-strength alloy wire and the Superconducting wire to form a high-strength Superconducting cable.

A modular micro mill for manufacturing steel long product from scrap metal using an induction melting furnace is disclosed. Scrap or pre-refined metal is delivered and melted in the induction melting furnace, the melted steel then being transferred by a preheated tundish to a casting station for producing billets. From the caster the billets are transferred directly to a billet staging station and stored in queue for delivering to main conveyor leading directly to the rolling mill without being cooled to ambient. The bars produced by the rolling mill are then quenched to impart desired metallurgical properties within the finished product. A control system runs the operation of the production line of the modular micro mill, the control system specifically adapting production rates, conveyor speeds, temperatures, etc. of components upstream within the production line based on the specific requirements and/or dimensions of the finished product exiting the production line.

A modular micro mill for manufacturing steel long product from scrap metal using an induction melting furnace is disclosed. Scrap or pre-refined metal is delivered and melted in the induction melting furnace, the melted steel then being transferred by a preheated tundish to a casting station for producing billets. From the caster the billets are transferred directly to a billet staging station and stored in queue for delivering to main conveyor leading directly to the rolling mill without being cooled to ambient. The bars produced by the rolling mill are then quenched to impart desired metallurgical properties within the finished product. A control system runs the operation of the production line of the modular micro mill, the control system specifically adapting production rates, conveyor speeds, temperatures, etc. of components upstream within the production line based on the specific requirements and/or dimensions of the finished product exiting the production line.

A process for producing grain-oriented electrical steel strip by means of thin slab continuous casting and which includes continuously casting the smelt by thin slab continuous casting, subjecting the thin slabs to homogenization annealing at a maximum temperature of 1250° C. and heating to a temperature between 1350° C. and 1380° C., and continuously hot rolling the thin slabs to form a hot-rolled strip, with cooling and reeling the hot-rolled strip to form a coil and cold rolling the hot-rolled strip to a nominal thickness, with subjecting the cold-rolled strip to recrystallization, decarburization and nitridation annealing, which includes a decarburization annealing phase and a subsequent nitridation annealing phase, with an intermediate reduction annealing phase being interposed between the decarburization annealing phase and the nitridation annealing phase, whereby a cold-rolled strip is obtained, which primary recrystallized grains have a circle equivalent mean size (diameter) between 22 μm and 25 μm.

A process for producing grain-oriented electrical steel strip by means of thin slab continuous casting and which includes continuously casting the smelt by thin slab continuous casting, subjecting the thin slabs to homogenization annealing at a maximum temperature of 1250° C. and heating to a temperature between 1350° C. and 1380° C., and continuously hot rolling the thin slabs to form a hot-rolled strip, with cooling and reeling the hot-rolled strip to form a coil and cold rolling the hot-rolled strip to a nominal thickness, with subjecting the cold-rolled strip to recrystallization, decarburization and nitridation annealing, which includes a decarburization annealing phase and a subsequent nitridation annealing phase, with an intermediate reduction annealing phase being interposed between the decarburization annealing phase and the nitridation annealing phase, whereby a cold-rolled strip is obtained, which primary recrystallized grains have a circle equivalent mean size (diameter) between 22 μm and 25 μm.

Provided is a carbon steel wire excellent in shear resistance as compared with a conventional one and a method of manufacturing such a carbon steel wire. Provided is a carbon steel wire 1 having a wire diameter of from 0.1 to 0.6 mm, and when the radius of a circular cross-section orthogonal to the longitudinal direction is r and a region from the outer periphery of the circular cross-section toward the center to 0.4r is a surface layer portion 2, the occupancy ratio of a crystal texture in the [110] orientation with respect to the longitudinal direction in the surface layer portion 2 is 60% or less.

Conventional Fe-based soft magnetic alloy ribbons each containing Co and Ni have a problem that magnetic anisotropy that is neatly arranged in one direction cannot be induced easily even by a magnetic field annealing treatment and, therefore, a wound magnetic cores, a problem that a residual magnetic flux density Br is high, a problem that the hysteresis of the B—H curve becomes large (coercivity Hc becomes large), a problem that the change in incremental permeability relative to superimposed magnetic field becomes large, and others. In order to solve the problems, provided is an Fe-based soft magnetic alloy ribbon including a Cu-concentrated region present directly below a surface of the ribbon, and a Co-concentrated region present directly below the Cu-concentrated region. Also provided is a magnetic core including the Fe-based soft magnetic alloy ribbon.

Conventional Fe-based soft magnetic alloy ribbons each containing Co and Ni have a problem that magnetic anisotropy that is neatly arranged in one direction cannot be induced easily even by a magnetic field annealing treatment and, therefore, a wound magnetic cores, a problem that a residual magnetic flux density Br is high, a problem that the hysteresis of the B—H curve becomes large (coercivity Hc becomes large), a problem that the change in incremental permeability relative to superimposed magnetic field becomes large, and others. In order to solve the problems, provided is an Fe-based soft magnetic alloy ribbon including a Cu-concentrated region present directly below a surface of the ribbon, and a Co-concentrated region present directly below the Cu-concentrated region. Also provided is a magnetic core including the Fe-based soft magnetic alloy ribbon.