A method for producing a nanocrystalline alloy ribbon having a resin film, the method including a step of preparing an amorphous alloy ribbon capable of nanocrystallization, a step of performing a thermal treatment for nanocrystallization of the amorphous alloy ribbon with tension exerted on the amorphous alloy ribbon, to obtain a nanocrystalline alloy ribbon, and a step of causing the nanocrystalline alloy ribbon to be held on the resin film with an adhesive layer therebetween.

An amorphous alloy particle is an amorphous alloy particle formed of an iron-based alloy, and the particle contains a grain boundary layer.

An alloy having formula (Fe.sub.1-xCo.sub.x).sub.100-y-z-aB.sub.yCu.sub.zM.sub.a, in which x=0.1-0.4, y=10-16, z=0-1, a=0-8, and M=Nb, Mo, Ta, W, Ni, or Sn, wherein the alloy has crystalline grains with an average size of 30 nm or less.

A method of producing an amorphous alloy ribbon having a composition of Fe.sub.100-a-bB.sub.aSi.sub.bC.sub.c (13.0 atom %≤a≤16.0 atom %, 2.5 atom %≤b≤5.0 atom %, 0.20 atom %≤c≤0.35 atom %, and 79.0 atom %≤(100-a-b)≤83.0 atom %) includes: preparing an alloy ribbon; and, in a state in which the alloy ribbon is tensioned with a tensile stress of from 5 MPa to 100 MPa, increasing a temperature of the alloy ribbon to from 410° C. to 480° C., at an average temperature increase rate of from 50° C./sec to less than 800° C./sec, and decreasing a temperature of the thus heated alloy ribbon to a temperature of a heat transfer medium for temperature-decreasing, at an average temperature decrease rate of from 120° C./sec to less than 600° C./sec, with performing the increase and decrease of temperature being performed by contacting the traveling alloy ribbon with a heat transfer medium.

An alloy is provided which consists of Fe.sub.100-a-b-c-d-x-y-zCu.sub.aNb.sub.bM.sub.cT.sub.dSi.sub.xB.sub.yZ.sub.z and up to 1 at % impurities, M being one or more of the elements Mo, Ta and Zr, T being one or more of the elements V, Mn, Cr, Co and Ni, Z being one or more of the elements C, P and Ge, 0 at %≤a<1.5 at %, 0 at %≤b<2 at %, 0 at %≤(b+c)<2 at %, 0 at %≤d<5 at %, 10 at %<x<18 at %, 5 at %<y<11 at % and 0 at %≤z<2 at %. The alloy is configured in tape form and has a nanocrystalline structure in which at least 50 vol % of the grains have an average size of less than 100 nm, a hysteresis loop with a central linear region, a remanence ratio Jr/Js of <0.1 and a coercive field strength H.sub.c to anisotropic field strength H.sub.a ratio of <10%.

This disclosure is directed at mechanical property improvement in a metallic alloy that has undergone one or more mechanical property losses as a consequence of forming an edge, such as in the formation of an internal hole or an external edge. Methods are disclosed that provide the ability to improve mechanical properties of metallic alloys that have been formed with one or more edges placed in the metallic alloy by a variety of methods which may otherwise serve as a limiting factor for industrial applications.

The object of the present invention is to provide an alloy ribbon capable of having excellent adhesiveness between the alloy ribbons when a plurality of the alloy ribbons is stacked; and also, to provide a magnetic core using the alloy ribbon. The present invention is an alloy ribbon comprising metals scattered on at least one surface of the alloy ribbon, in which diameters of the scattered metals are 1 μm or more, and the scattered metals include Cu.

The present disclosure provides an iron-based amorphous alloy as shown in formula (I): Fe.sub.aSi.sub.bB.sub.cP.sub.dM.sub.e (I); wherein a, b, c, d, and e are each independently atomic percentages of corresponding components; 80.5≤a≤84.0, 3.0≤b≤9.0, 8.0≤c≤15.0, 0.001≤d≤0.3, e≤0.4, and a+b+c+d+e=100; M is impurity element. The present disclosure provides an iron-based amorphous strip which has a saturation magnetic induction less than 1.62T. The present disclosure also provides a method for preparing the iron-based amorphous alloy. Further, after appropriate heat treatment, excellent soft magnetic properties will be obtained. The alloy material can be used as core material in the manufacture of power transformer, generator and engine.

The soft magnetic alloy of the present disclosure is represented by a composition formula of Fe.sub.aSi.sub.bB.sub.cCu.sub.dM.sub.e where M is at least one type of element selected from a group consisting of Nb, Mo, V, Zr, Hf, and W, and the formula satisfies 82.5≤a≤86, 0.3≤b≤3, 12.5≤c≤15.0, 0.05≤d≤0.9, and 0≤e<0.4 in at %. The soft magnetic alloy includes a structure that has a crystal grain with a grain diameter of 60 nm or less in an amorphous phase.

An alloy is provided which consists of Fe.sub.100−a−b−c−d−x−y−zCu.sub.aNb.sub.bM.sub.c T.sub.dSi.sub.xB.sub.yZ.sub.z and up to 1 at % impurities, M being one or more of the elements Mo, Ta and Zr, T being one or more of the elements V, Mn, Cr, Co and Ni, Z being one or more of the elements C, P and Ge, 0 at %≤a<1.5 at %, 0 at %≤b<2 at %, 0 at %≤(b+c)<2 at %, 0 at %≤d<5 at %, 10 at %<x<18 at %, 5 at %<y<11 at % and 0 at %≤z<2 at %. The alloy is configured in tape form and has a nanocrystalline structure in which at least 50 vol % of the grains have an average size of less than 100 nm, a hysteresis loop with a central linear region, a remanence ratio Jr/Js of <0.1 and a coercive field strength H.sub.c to anisotropic field strength Ha ratio of <10%.