CN112004621B

CN112004621B - Amorphous metal thin strip, method for processing same, and method for producing laminate

Info

Publication number: CN112004621B
Application number: CN201980027450.0A
Authority: CN
Inventors: 太田元基
Original assignee: Bomeilicheng Co ltd
Current assignee: Bomeilicheng Co ltd
Priority date: 2018-04-25
Filing date: 2019-04-24
Publication date: 2023-07-14
Anticipated expiration: 2039-04-24
Also published as: WO2019208651A1; JP7219869B2; JP2023015163A; JP7396434B2; JPWO2019208651A1; CN112004621A; JP2023015164A; JP7388518B2

Abstract

The present invention provides a method for suppressing the occurrence of cracks or fissures in an amorphous metal ribbon during the machining of the amorphous metal ribbon. In the method for processing an amorphous metal thin strip according to the present invention, the amorphous metal thin strip is vibrated and then machined or is vibrated and then machined. Specifically, in the method for processing an amorphous metal thin strip, the amorphous metal thin strip has a saturation magnetostriction of 1ppm or more, and the vibration is a vibration caused by magnetostriction of the amorphous metal thin strip. Or, for the amorphous metal thin strip, a portion to which vibration is locally applied by a processing tool is machined.

Description

Amorphous metal thin strip, method for processing same, and method for producing laminate

Technical Field

The present invention relates to an amorphous metal ribbon, a method of processing the same, and a method of manufacturing a laminate.

Background

Amorphous metal ribbons (amorphous metal ribbon) are widely used in a variety of applications. Examples thereof include amorphous metal thin-band information devices having soft magnetism, automobiles, home appliances, consumer appliances, industrial machinery, and the like, and more specifically, materials useful for high efficiency and high gain such as rotating electrical machines, reactors, power transformers, noise suppression parts, and magnetic antennas.

Amorphous metal ribbons are generally considered to be high in hardness and low in ductility. For example, amorphous metal thin films having soft magnetic properties are usually produced into long (long-sized) ribbon-like members by a molten metal quenching method such as a single roll method. The thickness of the thin strip is mainly 5-70 mu m. The Vickers hardness HV of the hardness of the metal strips is more than 500. Thus, amorphous metal ribbons have the disadvantage of being significantly difficult to machine.

In the related art, these amorphous metal strips are mainly used as winding cores wound in a ring shape, which can be manufactured with little machining. In recent years, a technique of laminating an amorphous metal thin ribbon on a winding core to use as a magnetic member for a rotating electrical machine, a reactor, an antenna, or the like has been studied.

Since amorphous metal ribbons are produced as a member in a strip-like form, when the amorphous metal ribbons are laminated to form a laminate, a step of processing the amorphous metal ribbons in a strip-like form into a predetermined shape and then laminating the same may be employed. As a method of forming the amorphous metal thin strip into a predetermined shape, there are etching, electric discharge, laser processing, and the like. However, these processing methods have extremely low processing efficiency and have problems in industrial production. In addition, since the amorphous metal ribbon is brittle, there are also problems that cracks and fissures are not avoided and the processing yield is poor.

The processing method having versatility for the amorphous metal thin strip is still machining such as punching and cutting by moving a die and a processing tool in the thickness direction. However, in the mechanical processing using an amorphous metal thin strip as a workpiece, cracks and fissures are more likely to occur than in the processing method described above.

As a countermeasure for this, for example, patent document 1 discloses a technique of forming a thermosetting resin between metal strips at a predetermined thickness by forming a plurality of laminated plates of soft magnetic metal strips having a thickness of 8 to 35 μm on the premise of punching an amorphous metal strip. Further, as an effect thereof, it is described that a laminate excellent in punching workability and high in performance can be easily provided.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2008-213410

Disclosure of Invention

Problems to be solved by the invention

However, as countermeasures against cracks and fissures, not only studies for reinforcing mechanical strength by members other than amorphous metal thin strips as in patent document 1 but also improvements in mechanical processing itself have been demanded.

The present invention provides a method for suppressing the occurrence of cracks and fissures in an amorphous metal thin strip during machining of the amorphous metal thin strip. Further, a method for producing a laminate using the amorphous metal thin strip is provided. Further, an amorphous metal ribbon obtained by the machining is provided.

Means for solving the problems

The invention relates to a processing method of amorphous metal ribbon,

the amorphous metal strip is subjected to machining after being vibrated, or is subjected to machining while being vibrated.

In the present invention, the amorphous metal strip has a saturation magnetostriction (saturation magnetostriction) of 1ppm or more, and the vibration can be vibration due to magnetostriction of the amorphous metal strip.

The frequency of the vibration may be 1Hz to 500 kHz.

The vibration can be generated by applying an alternating magnetic field of 1A/m or more to the amorphous metal strip.

The amorphous metal strip is a long strip, and can be machined while being conveyed in the long direction.

In the above-described present invention, the present invention,

with the amorphous metal thin strip, a portion to which vibration is locally applied by a processing tool can be machined.

The following processing method is possible: the processing tool includes a punch and a punch holder capable of holding upper and lower surfaces of the amorphous metal thin strip, at least one of the punch and the punch holder is capable of sliding in a thickness direction of the amorphous metal thin strip, the punch and the punch holder are capable of holding upper and lower surfaces of the amorphous metal thin strip, at least one of the punch and the punch holder is capable of vibrating in the thickness direction, vibration is applied to the amorphous metal thin strip at a portion of the amorphous metal thin strip located at a sliding portion of the punch and the punch holder, and punching processing is performed at a portion of the amorphous metal thin strip where repetitive fatigue is applied by the vibration by the punch.

The amorphous metal ribbon may be made of a material containing Fe as a main component, which is produced by roll cooling.

The thickness of the amorphous metal ribbon may be 5 μm or more and 70 μm or less.

The amorphous metal ribbon may have a vickers hardness HV of 500 or more.

The amorphous metal thin strips processed by the processing method of the amorphous metal thin strips can be laminated to form a laminate.

The amorphous metal thin strip of the present invention is obtained by the above-described method for processing an amorphous metal thin strip.

An amorphous metal thin strip having a shearing surface formed by machining on a working surface of the thin strip, wherein the contour of the thin strip surface on the side of the sagging surface has a corrugated shape.

The corrugated profile may have irregularities with a period of 0.1 to 20 μm on average.

In addition, the shearing surface may occupy 40% or more of the area of the processed surface.

Further, the profile of the shear surface on the sagging side can have a relevant waviness with respect to the profile of the sagging side of the thin strip surface.

In addition, other amorphous metal ribbons of the present invention are as follows.

An amorphous metal strip having a shear plane formed by machining on a machined surface of the strip,

The fracture surface of the machined surface of the thin strip occupies 50% or more of the area.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, it is possible to suppress cracks and fissures generated in an amorphous metal thin strip during machining of the amorphous metal thin strip. Thus, a machined amorphous metal ribbon with high dimensional accuracy can be obtained, and further, a laminate obtained by laminating the amorphous metal ribbon can be obtained.

Drawings

Fig. 1 is a schematic view of a processing apparatus used in the present invention.

Fig. 2 is a schematic view of another processing apparatus used in the present invention.

Fig. 3 is a schematic view of another processing apparatus used in the present invention.

Fig. 4 is a schematic view of another processing apparatus used in the present invention.

Fig. 5 is a schematic illustration of a machined amorphous metal ribbon without cracks and fissures as judged to be acceptable.

Fig. 6 is a schematic view of a machined amorphous metal ribbon with cracks and fissures that are judged to be unacceptable.

Fig. 7 is a BH curve showing soft magnetic characteristics of an amorphous metal thin ribbon used in the embodiment.

Fig. 8 is an enlarged view of a part of the horizontal axis of fig. 7.

FIG. 9 is a photograph of the working face of the amorphous metal strip of example 1 (Table 1No. 2).

Fig. 10 is an enlarged photograph of fig. 9.

Fig. 11 is a schematic diagram of fig. 10.

FIG. 12 is a photograph of the working face of a comparative amorphous metal ribbon (Table 1No. 8).

Fig. 13 is an enlarged photograph of fig. 12.

Fig. 14 is a schematic view of fig. 13.

Fig. 15 is a photograph of the working face of the amorphous metal ribbon of example 4.

Fig. 16 is a schematic view of fig. 15.

Fig. 17 is a photograph of the working face of another comparative amorphous metal ribbon.

Fig. 18 is a schematic diagram of fig. 17.

Detailed Description

The present invention will be specifically described with reference to embodiments, but the present invention is not limited to these embodiments.

The embodiment of the invention is a processing method of amorphous metal thin strip,

Amorphous metal ribbons are extremely high fracture toughness materials. Therefore, when fracture starts to occur in the thin strip during machining, large plastic deformation occurs at the tip of the fracture crack, and as a result, a large impact is generated between the amorphous metal thin strip and the machining tool. In addition, since the amorphous metal ribbon has extremely high hardness as described above, cracks and fissures are easily generated at the cut portion by the impact. Particularly, when the shape is processed into a complicated shape, cracks and fissures are likely to occur at corners or the like having a small curvature.

However, in the present invention, it has been found that this problem can be suppressed by adopting the above-described processing method.

The mechanism for obtaining the effects of the present invention is presumed as follows.

In general, glass is often cut by a processing method in which scratches are formed on the surface, and the scratches are mainly used as starting points, so that elastic fracture propagates in cracks. The entire glass is mainly covalently and electronically coupled in atomic arrangement, and any part of the glass is hard, so that the above-mentioned processing method can be adopted.

Just like amorphous metal ribbons are also known as metallic glasses, like glass, the arrangement of atoms is irregular. However, unlike general glasses, the coupling morphology between transition metals (e.g., fe—fe) is mainly metallic coupling, but covalent electron coupling is formed in coupling containing a semimetal (metalloid element), and the hardness varies depending on the site at the atomic level of the thin band. In addition, in the metal (alloy), there is a large number of spaces (lattice defects in the crystal phase) in which atoms called free volumes exist, and by means of these free volumes, atoms can move, thus allowing large plastic deformation. On the other hand, the surface of the ribbon has no free volume and has very hard features. Therefore, it is presumed that the amorphous metal ribbon is difficult to apply to the same processing method as glass, and it is necessary to perform mechanical processing by shear deformation.

Accordingly, the inventors of the present invention have conceived a machining method in which an amorphous metal thin strip is vibrated and then machined, or the amorphous metal thin strip is vibrated and then machined. Here, machining while vibrating the amorphous metal strip includes machining the amorphous metal strip while vibrating a machining tool.

The above-described processing methods are considered to have the effects (1) to (3).

(1) By vibrating the amorphous metal ribbon, the brittleness of the amorphous metal ribbon can be improved. Therefore, by performing machining after vibration, the workability can be improved for the object to be machined that is not vibrated.

(2) By vibrating the amorphous metal ribbon, the brittleness of the amorphous metal ribbon can be improved. Therefore, by performing machining while vibrating the machining tool, that is, by performing machining while vibrating the amorphous metal thin strip, it is possible to improve workability for a machining object that is not vibrated.

(3) By performing the machining while vibrating the amorphous metal thin strip, the amorphous metal thin strip vibrates relatively when it comes into contact with the machining tool, and thus the machining is started in the same state as the grinding of the hard surface of the amorphous metal thin strip, enabling high-precision machining. In addition, the inside of the thin strip is then shear deformed by machining.

In addition, when a sharp cutting blade is used as a processing tool, the cutting blade is normally pressed against an object to be processed, and is relatively moved in this state to cut. In this case, it is necessary to move the cutting blade and the workpiece in a predetermined direction by a predetermined distance. In addition, the processing of curves and complex shapes is extremely difficult.

In the case of using vibration as in the present invention, it is known that the edge portion of the cutting blade has a microscopic saw tooth shape, and when such a cutting blade vibrates relatively to the amorphous metal thin strip, a notch can be generated on the surface of the workpiece without moving the workpiece relatively to the cutting blade for a long distance.

Further, the present invention has other secondary effects, and can be expected to have an effect of extending the lifetime of a processing tool. The impact at the time of the hard strip surface striking is greatly reduced by suppressing the press-in speed.

In the present invention, machining means a known machining method for machining an object to be machined using a machining tool or a machine tool. For example, punching, shearing, cutting, slitting, and the like.

Hereinafter, a specific method for processing the amorphous metal thin strip will be described.

In an embodiment of the present invention, the amorphous metal thin strip has a saturation magnetostriction of 1ppm or more, and the vibration can be vibration caused by magnetostriction of the amorphous metal thin strip.

The processing method is characterized in that the amorphous metal ribbon is not vibrated by external stress, but is vibrated by magnetostriction by applying an alternating magnetic field. By performing the vibration in this way, only the amorphous metal thin strip can be easily vibrated. Therefore, by vibrating the processing tool, the object to be processed can be vibrated with small energy. Further, since the amorphous metal thin strip itself serves as a vibration source, it is possible to reliably vibrate the amorphous metal thin strip, and the effect of suppressing cracks and fissures can be improved. That is, in the case of processing a laminate of amorphous metal thin strips with a resin interposed therebetween, when vibration is caused by external stress, there is a possibility that vibration is absorbed by the resin, and sufficient vibration is not imparted to the inner amorphous metal thin strips in the lamination direction, but even in such a processed object, the amorphous metal thin strips are likely to vibrate, and the crack and fissure suppressing effect of the present invention is obtained.

In addition, the processing method is characterized in that the amorphous metal thin strip is vibrated in a plurality of directions. In this embodiment, since the amorphous metal thin strip is vibrated by magnetostriction, vibration due to compression and expansion is generated in the direction in which the magnetic field is applied, and vibration due to expansion and compression is generated simultaneously in the direction perpendicular to the direction in which the magnetic field is applied. That is, no matter in which direction the working tool is in contact with the amorphous metal ribbon, the working tool and the amorphous metal ribbon are in a state of stably sliding relative to each other as compared with vibration in a single direction, and therefore, the crack and the crack suppressing effect can be easily obtained.

In addition, the machining method is easier to machine than existing machining methods. The reason for this will be described below.

Most amorphous metal thin strips are produced by roll quenching in view of industrial productivity. Roll quenching is a method of dropping a molten liquid metal onto a roll made of a metal having high thermal conductivity (for example, cu alloy), and causing the molten liquid metal to adhere closely to the roll and rapidly solidify the molten liquid metal. Since 1X 10 can be obtained ⁵ ～1×10 ⁷ Since the cooling rate is extremely high at about c/s, roll quenching is widely used as a casting method for amorphous metal thin strip.

However, since the molten metal is solidified in a very short time, unevenness in the partial cooling rate is reflected, and irregularities are easily generated on the surface of the thin strip. When these thin tapes are laminated and punched at the same time, the convex portions on the 1 thin tape surface are likely to contact the opposing thin tape surface and are unlikely to slide in the in-plane direction, and therefore, the thin tapes are likely to be machined along the shape of the insert of the machining tool, but on the other hand, the concave portions are likely to slide, so that the stress from the machining tool is dispersed and the thin tapes are unlikely to be machined along the shape of the insert of the machining tool.

In particular, since the amorphous metal ribbon has high hardness, it is necessary to accelerate the relative speed with respect to the processing tool during mechanical processing, and the amorphous metal ribbon breaks in a torn manner, thereby causing a defect of detachment from the cut line.

In the method of processing an amorphous metal thin strip according to the present embodiment, since the thin strip is mechanically processed in a state of vibrating, the thin strip and the amorphous metal thin strip move relatively and positively, and therefore, a small notch can be generated from a portion where a processing tool is in contact with the thin strip, and shear deformation can be advanced from the portion as a starting point. Therefore, the concave portion of the thin belt is also fixed by the restraining force of the surrounding stronger restraint, so that the cutting shear is easy.

In this embodiment, an amorphous metal ribbon having a saturation magnetostriction of 1ppm or more is used. If the saturation magnetostriction is less than 1ppm, sufficient vibration is not generated, and the effect of the present invention is not easily obtained. The saturation magnetostriction is preferably 3ppm or more, more preferably 5ppm or more, still more preferably 10ppm or more, and still more preferably 15ppm or more.

The vibration preferably has a frequency of 1Hz to 500 kHz. If the frequency is less than 1Hz or exceeds 500kHz, it is difficult to obtain the effect of suppressing cracks and fissures.

The lower limit of the frequency is preferably 10Hz, more preferably 100Hz, and even more preferably 1kHz. The upper limit of the frequency is preferably 400kHz, more preferably 300kHz, more preferably 80kHz, more preferably 60kHz, more preferably 40kHz.

The vibration is preferably generated by applying an alternating magnetic field of 1A/m or more to the amorphous metal thin strip. If the lower limit value of the AC magnetic field is less than 1A/m, it is difficult to obtain the crack and crack suppressing effect.

The lower limit value of the alternating-current magnetic field is preferably 10A/m, more preferably 30A/m, more preferably 70A/m, more preferably 100A/m, more preferably 130A/m.

The amorphous metal strip is a strip (long length) and can be machined while being transported in the direction of the strip. In addition, when machining is performed while conveying, the movement of the amorphous metal thin strip may be stopped at the time of machining, and after machining, the movement may be started again to continuously perform machining.

It is known that thin strips in transit are prone to breakage. When the thin belt is vibrated by external stress, the thin belt may be easily broken further around the place where the stress is applied during conveyance. On the other hand, when the amorphous metal ribbon is vibrated by magnetostriction, the magnetic flux flows in the in-plane direction of the amorphous metal ribbon, and local internal stress is less likely to occur, so that breakage of the ribbon during conveyance can be suppressed as compared with the case where the ribbon is vibrated by applying stress from the outside.

Further, the object to be processed according to the present invention is limited to an amorphous metal thin strip, but the processing method according to the present embodiment is not limited to this, and a crack and crack suppressing effect can be obtained even with a material other than an amorphous metal thin strip having magnetostriction.

That is, as another invention, there can be provided a method of machining a metal thin strip by machining while applying vibration to at least one of the metal thin strip and a machining tool used for machining,

the same effect as in the present invention is obtained by making the metal thin strip have a saturation magnetostriction of 1ppm or more, and the vibration is a vibration caused by magnetostriction of the metal thin strip.

According to the above-described method for processing an amorphous metal thin strip, an amorphous metal thin strip according to the following embodiment is obtained.

The amorphous metal thin strip according to the present embodiment has a shear surface formed by machining on a machined surface of the thin strip, and the contour on the sagging surface side of the surface of the thin strip is corrugated on the machined surface. The processed surface corresponds to a punched surface (side surface) and a cut surface (cut surface) in punching and cutting.

Specifically, the corrugated profile may have irregularities with a period of 0.1 to 20 μm on average. Thus, the reason why the irregularities exist at a period of 0.1 to 20 μm is presumed as follows. In this magnetostrictive vibration method, the polarity of a magnetic field is switched at a period of several tens kHz. That is, the positive magnetization state and the negative magnetization state are switched at a high frequency. Magnetostriction also becomes large in the magnetized state, and becomes zero in the magnetized state. The high-speed magnetization reversal is caused by the movement of the magnetic wall, and the magnetostriction is minimized on the magnetic wall. The magnetic domain width (which is the distance between the magnetic walls and is about 2 times the distance traveled by the magnetic walls) is 0.2 to 40 μm so as to be able to follow the magnetization reversal at high speed. It is assumed that the magnetic wall having a volume different from the surrounding is moved in a state pressed from the upper surface by the blade, as if the blade is moved in a zigzag manner. The method for measuring the average period of the irregularities is a method for measuring the average value of the intervals between the deepest portions of adjacent concave portions at least at 5 points. The irregularities are formed by a difference of 0.3 μm or more in height in the thickness direction of the thin strip between the concave portions and the convex portions.

In addition, the amorphous metal strip according to the present embodiment may occupy 40% or more of the area of the machined surface in the shearing surface. The shearing surface may be 50% or more, 60% or more, or 65% or more. The value of the area occupied by the shearing surface of the processed surface can be calculated by the following measurement method. First, the thickness T (T1, T2, … … Tn) of the thin strip and the width W (W1, W2, … … wn) of the shearing surface were measured at any plurality of positions on the machined surface. Thereafter, wsum/tsum×100 (%) was calculated from the sum Tsum of T1 to Tn and the sum Wsum of w1 to w 2. In the present embodiment, the above-mentioned numerical value is calculated by setting 5 arbitrary measurement points within the range of 450 μm in width of the work surface.

In addition, the amorphous metal strip according to the present embodiment may have a corrugated shape on the work surface, with respect to the profile on the sagging surface side of the strip surface, the profile on the sagging surface side of the shear surface. The relevant moire type means that the variation in the period of the unevenness (the interval between the deepest portions of adjacent concave portions) occurs similarly in both of the two contours. In this way, the reason for the existence of the correlation between both of the two corrugated profiles is presumed as follows. As described above, the origin of this periodicity is believed to depend on the distance between the magnetic walls. The magnetostriction is linear magnetostriction, and a region in a magnetostriction state different from the surrounding in the vicinity of the magnetic wall is expanded in the vertical direction, and volume fluctuation of the same period repeatedly occurs at a position where a collapse and a fracture are formed, that is, immediately below the blade, and therefore both contours are considered to be exactly similar.

Other embodiments will be described with respect to a method for processing an amorphous metal thin strip according to the present invention. In this embodiment, a method is used in which a portion to which vibration is locally applied by a processing tool is machined with respect to an amorphous metal thin strip.

According to this embodiment, since the portion having increased brittleness is machined, workability can be improved, and a crack suppressing effect can be easily obtained.

This embodiment, for example, includes a punch and punch holder capable of holding upper and lower surfaces of an amorphous metal ribbon,

at least one of the punch and the punch holder is capable of sliding in the thickness direction of the amorphous metal strip,

the following steps can be employed: the upper and lower surfaces of the amorphous metal thin strip are held by the punch and the punch holder, at least one of them vibrates in the thickness direction, vibration is applied to the amorphous metal thin strip at a portion of the amorphous metal thin strip located at a sliding portion of the punch and the punch holder, and punching is performed by the punch at a portion where repeated fatigue is applied by the vibration.

According to this embodiment, the following amorphous metal thin strip is obtained.

The amorphous metal thin strip according to the present embodiment has a shearing surface formed by machining on the machined surface of the thin strip, and the fracture surface occupies 50% or more of the area on the machined surface of the machined thin strip. The fracture surface may occupy 60% or more, and further 65% of the area.

The numerical value of the area occupied by the fracture surface of the machined surface can be calculated by the following measurement method. First, the thickness T (T1, T2, … … Tn) of the thin tape and the width W (W1, W2, … … Wn) of the fracture surface were measured at any plurality of positions on the machined surface. Thereafter, wsum/tsum×100 (%) was calculated from the sum Tsum of T1 to Tn and the sum Wsum of W1 to W2. In the present embodiment, the above-mentioned numerical value is calculated by setting 5 arbitrary measurement points within the range of 450 μm in width of the work surface.

The amorphous metal ribbon used in the present embodiment will be described below.

The means for producing the amorphous metal thin strip is not particularly limited.

As an example, a thin strip containing Fe as a main component manufactured by roll cooling can be used. The main component is the component having the largest content.

For example, the amorphous metal thin ribbon of the present embodiment uses a material having the following composition: when the total amount of Fe, si and B is set to 100 at%, si is 0 at% or more and 10 at% or less, B is 10 at% or more and 20 at% or less, and Fe occupies the balance.

When the Si amount and the B amount are out of the ranges, amorphous alloy is difficult to be formed by roll cooling, or mass productivity is liable to be lowered. As an additive or unavoidable impurity, elements other than Fe, si, and B, such as Mn, S, C, al, may be contained. The amorphous metal thin ribbon preferably has the above composition, and is amorphous (amorphous) having no crystal structure, preferably a soft magnetic material. The Si content is preferably 3 atomic% or more and 10 atomic% or less. The amount of B is preferably 10 at% or more and 15 at% or less. The amount of Fe is preferably 78 at% or more, more preferably 79.5 at% or more, still more preferably 80 at% or more, and still more preferably 81 at% or more, in order to obtain a high saturation magnetic flux density Bs. Although the amorphous metal ribbon may contain unavoidable impurities, the total content of Fe, si, and B is preferably 95 mass% or more, and more preferably 98 mass% or more. The amorphous metal ribbon is also sometimes referred to as an amorphous alloy ribbon, a soft magnetic amorphous alloy ribbon, or the like.

The amorphous metal ribbon has a saturation magnetostriction of 5ppm or more and a Vickers hardness HV of 700 or more.

In addition, amorphous metal ribbons capable of nanocrystalline may also be used. As the amorphous metal ribbon capable of nanocrystalline, an Fe-based ribbon can be used. Specifically, as the Fe-based amorphous alloy ribbon, a ribbon represented by the following general formula: (Fe) _1-a M _a ) _{100-x-y-z-α-β-γ} Cu _x Si _y B _z M’ _α M” _β X _γ (atom%) (wherein M is Co and/or Ni, M' is selected from Nb, mo, ta, ti, zr, hf, V, cr, mn andat least 1 element of W, M' is at least 1 element selected from Al, platinum group element, sc, rare earth element, zn, sn, re, X is at least 1 element selected from C, ge, P, ga, sb, in, be, as, a, X, y, z, alpha, beta and gamma satisfy 0.ltoreq.a.ltoreq.0.5, 0.1.ltoreq.x.ltoreq.3, 0.ltoreq.y.ltoreq.30, 0.ltoreq.z.ltoreq.25, 5.ltoreq.y+z.ltoreq.30, 0.ltoreq.alpha.ltoreq.20, 0.ltoreq.beta.ltoreq.20 and 0.ltoreq.gamma.ltoreq.20, respectively. ) Alloy of the indicated composition. Preferably, a, x, y, z, α, β and γ are in the ranges satisfying 0.ltoreq.a.ltoreq.0.1, 0.7.ltoreq.x.ltoreq.1.3, 12.ltoreq.y.ltoreq.17, 5.ltoreq.z.ltoreq.10, 1.5.ltoreq.α.ltoreq.5, 0.ltoreq.β.ltoreq.1 and 0.ltoreq.γ.ltoreq.1, respectively.

The amorphous metal thin ribbon capable of nano-crystallization is subjected to heat treatment at a temperature higher than the crystallization start temperature, thereby nano-crystallizing the amorphous metal thin ribbon.

At least 50% by volume, and further 80% by volume of the nanocrystalline alloy is occupied by fine grains having a grain size of 100nm or less on average, as measured by the largest dimension. In addition, the portions other than the fine grains in the alloy are mainly amorphous. The proportion of fine grains can also be substantially 100% by volume.

By melting the alloy having the above composition at a temperature not lower than the melting point, and quenching and solidifying the alloy by a roll method, a long amorphous metal ribbon can be obtained.

Amorphous metal ribbons having a thickness of 5 μm to 70 μm can be used. If the thickness is less than 5. Mu.m, the mechanical strength of the amorphous metal thin strip is insufficient, and handling during mechanical processing and continuous conveyance in the longitudinal direction tend to be difficult. The thickness is preferably 15 μm or more, more preferably 20 μm or more. On the other hand, if the thickness of the ribbon exceeds 70 μm, there is a tendency that it is difficult to stably obtain an amorphous phase in a thin ribbon depending on the composition. The thickness is preferably 50 μm or less, more preferably 35 μm or less, and still more preferably 30 μm or less.

An apparatus of an embodiment for performing machining will be described.

For example, the apparatus described in fig. 1, 2, and 3 can be used. However, in the present invention, the usable device is not limited thereto.

The apparatus of fig. 1 is a schematic diagram of an apparatus used in the method of processing an amorphous metal thin strip (mechanical processing while vibrating an amorphous metal thin strip having magnetostriction by magnetostriction) according to an embodiment.

The apparatus of fig. 1 includes an amorphous metal thin strip 1, a coil 2 wound in such a manner that a magnetic flux flows toward the amorphous metal thin strip 1, and a processing tool 6 capable of mechanically processing the amorphous metal thin strip 1. The coil 2 flows an ac current from the ac power supply 3 amplified by the amplifier 4.

In the embodiment of fig. 1, a long amorphous metal thin ribbon 1 is wound around an annular bobbin 5 having flexibility at least on the outer circumferential side in the circumferential direction. The processing tool 6 is a cutting blade. The processing tool 6 is movable in the radial direction of the spool 5, and when moving to the spool side, the tip of the cutting blade can come into contact with the amorphous metal thin strip 1 wound around the peripheral surface of the spool 5. The spool 5 is made of a flexible material that can be inserted into the outer peripheral surface of the spool and is moved from the outer peripheral surface to the inner diameter side.

The method of use of the device of fig. 1 is described. By flowing an alternating current to the coil 2, an alternating magnetic field is generated in the axial direction of the coil, and the alternating magnetic flux flows to the amorphous metal strip 1 disposed inside the coil, thereby magnetostrictively vibrating the amorphous metal strip 1. By pressing the tip of the cutter blade 6 against the surface of the amorphous metal thin strip 1 while maintaining this state, the amorphous metal thin strip 1 is subjected to machining such as cutting, slitting, punching, and the like.

In the embodiment of fig. 1, the amorphous metal ribbon 1 wound around the bobbin does not need to have a circular shape, and may have a circular arc shape. In this case, a yoke for refluxing the magnetic flux flowing to the amorphous metal thin strip may also be used.

The apparatus of fig. 2 is a schematic diagram of another apparatus used in the method of processing an amorphous metal thin strip (mechanical processing while magnetostrictive vibrating an amorphous metal thin strip having magnetostriction) according to the embodiment, like fig. 1.

The apparatus of fig. 2 includes an amorphous metal thin strip 1, a coil 2 wound so as to flow magnetic flux to the amorphous metal thin strip 1, and a machining tool capable of machining the amorphous metal thin strip 1, as in fig. 1.

In the embodiment of fig. 2, regarding the processing tool, 6a is a punch (punch, hole puncher) for punching, and 6b is a punch frame (punch frame, hole punching frame) for punching. A part of the long amorphous metal strip 1 is disposed at a position where punching by the processing tools 6a and 6b is possible. In the drawing, a long amorphous metal thin strip 1 is unwound from an unwinding roll 7 and conveyed to processing tools 6a and 6b. The processing tools 6a and 6b punch the conveyed amorphous metal thin strip 1. This enables machining to be performed simultaneously with continuously conveying the amorphous metal thin strip 1.

In the figure, the coil 2 is formed such that its axial direction is parallel to the longitudinal direction of the amorphous metal thin strip 1.

The ac power supply 3 and the amplifier 4 have the same configuration as in fig. 1, and the description thereof is omitted.

The method of use of the device of fig. 2 is described. As in fig. 1, an ac current is applied to the coil 2 to generate an ac magnetic field in the axial direction of the coil, and an ac magnetic flux is applied to the amorphous metal ribbon 1 disposed inside the coil to cause the amorphous metal ribbon 1 to magnetostrictive vibrate. The punching process is performed by sliding the processing tools 6a and 6b while maintaining this state.

In the embodiment of fig. 2, a yoke 8 for refluxing the magnetic flux flowing to the amorphous metal thin strip is used.

The apparatus of fig. 3 is a schematic diagram of an apparatus used in the method of processing an amorphous metal thin strip (a method of processing a portion of an amorphous metal thin strip to which vibration is locally applied by a processing tool) according to the embodiment. The portion to which vibration is applied is embrittled due to repeated fatigue. Thus, machining becomes easy.

The apparatus of fig. 3 comprises an amorphous metal ribbon 1 and a machining tool capable of machining the amorphous metal ribbon 1. The processing tool includes

punches

8a, 8b and punch

holders

9a, 9b capable of holding upper and lower surfaces of the amorphous metal thin strip, respectively.

The method of use of the device of fig. 3 is described. The

punches

8a, 8b and the

punch holders

9a, 9b are each slidable in the thickness direction of the amorphous metal thin strip. The amorphous metal thin strip 1 is held by the

punches

8a and 8b and the

punch holders

9a and 9b, respectively, and at least one of them vibrates in the thickness direction (the arrows of the

punch holders

9a and 9b in fig. 3 indicate vibration), and vibration is applied to the amorphous metal thin strip at the portion of the sliding portions of the

punches

8a and 8b and the

punch holders

9a and 9b, and repetitive fatigue is applied by the vibration. Thereafter, as shown in fig. 4, the

punches

8a and 8b move in the thickness direction of the amorphous metal thin strip, whereby the amorphous metal thin strip 1 is punched at the site where the repeated fatigue is applied.

The unreeling roller 7 and the amorphous metal thin strip 1 have the same structure as in fig. 2, and the description thereof is omitted.

As the processing tool, for example, a cutting blade for cutting, a cutter blade for slitting, or the like can be used in addition to the above description.

As a method of applying vibration to at least one of the amorphous metal ribbon and the processing tool used in the processing, an ultrasonic wave generating device or the like can be used in addition to the magnetostrictive vibration using the coil. The ultrasonic wave generating apparatus may be configured as known ones, and is not particularly limited.

In the method for processing an amorphous metal thin strip described above, the amorphous metal thin strip may be subjected to mechanical processing in a state where at least one surface of the amorphous metal thin strip is coated with a resin or a resin sheet is attached thereto.

The amorphous metal thin strip processed according to the processing method of amorphous metal thin strip described above can be laminated to form a laminate.

Example 1

The amorphous metal ribbon was machined using the apparatus described in fig. 1. Specifically, the following conditions were used.

As the amorphous metal thin strip, a thin strip slit at a width of 25mm is used.

As the amorphous metal ribbon, fe, si, and B were set to 100 atomic%, fe:82 atomic%, si:4 atomic percent, B:14 atomic% of a thin strip of composition. Further, unavoidable impurities such as Cu and Mn are 0.5 mass% or less.

The thickness of the amorphous metal ribbon was 20. Mu.m, the saturation magnetostriction was 27ppm, and the Vickers hardness HV was 800.

The amorphous metal thin ribbon having such a composition is also known to have high magnetic permeability as a soft magnetic material, and magnetization tends to occur following an ac magnetic field, whereby the magnetic body itself is vibrated by a magnetization process.

A cutting blade with a sharp front end is used as the processing tool 6.

The bobbin 5 uses a paper tube. Since the paper tube has flexibility on the outer peripheral side, the tip of the cutter blade can be inserted into the outer peripheral side of the outer diameter portion. The outer diameter of the spool was 100mm.

The above-described slit amorphous metal strip 1 was wound around the bobbin in the circumferential direction for 2 turns. The magnetic path length of the wound amorphous metal thin strip 1 is about 0.314m.

The number of turns of the coil 2 is 10. An alternating current of 10kHz to 200kHz is supplied from an alternating current power source 3 to an amplifier 4, and the current is amplified by the amplifier 4 so that the maximum value of an alternating magnetic field generated in the coil becomes 70A/m and 130A/m, and the alternating current flows in the coil 2.

The amorphous metal strip 1 was magnetostrictively vibrated under the above conditions, and a load of 10kgf (about 100N pressed by an arm) was applied to the cutter blade 6 while maintaining the state, and the tip thereof was pressed against the surface of the amorphous metal strip 1.

In comparison, machining was performed in the same manner as in embodiment 1, except that magnetostrictive vibration was not caused.

Under the above conditions, it was confirmed how much magnetostriction was generated in the amorphous metal ribbon.

Fig. 7 and 8 are B-H curves showing the soft magnetism of the amorphous metal thin strip used, and fig. 8 is an enlarged view of the horizontal axis portion of fig. 7. As shown in fig. 7, the magnetic flux density of the amorphous metal thin strip at 800A/m is b=1.5t near the saturation magnetic flux density. Further, as shown in fig. 8, the magnetic flux density of 130A/m is b=1.1t, which is about 73.3% of the saturation magnetic flux density. Since the saturation magnetostriction of the amorphous metal ribbon was 27ppm, the amorphous metal ribbon was magnetostrictively vibrated at a magnetostriction of 19.8ppm calculated by 27ppm×73.3% by applying an alternating magnetic field of 130A/m.

Similarly, when the calculation was performed with an alternating magnetic field of 70A/m applied to the amorphous metal thin strip, it was made to perform magnetostrictive vibration at a magnetostriction of 16 ppm.

Table 1 shows the frequency f of the ac power supply 3, the maximum magnetic field strength H generated In the coil, the qualification rate Out of the mechanical processing of the amorphous metal thin strip on the outer peripheral side, and the qualification rate In of the mechanical processing of the amorphous metal thin strip on the inner peripheral side.

The yield of the machining was determined to be acceptable when no crack or fissure was generated from the scribe line 12 as shown in fig. 5, and was determined to be unacceptable when a crack 10 or fissure 11 was generated from the scribe line 12 as shown in fig. 6. The number of experiments for machining was 10.

TABLE 1

No	f(kHz)	H(A/m)	Out(％)	In(％)	Heating at above 40deg.C
						1	10	130	90	90	Without any means for
2	20	130	90	100	Without any means for
						3	40	130	90	100	Without any means for
4	60	130	80	80	Has the following components
						5	80	130	60	80	Has the following components
6	100	130	60	90	Has the following components
						7	200	70	60	90	Has the following components
8	0	0	10	50	Has the following components

In the measurement result of No.8 in which the amorphous metal thin strip was machined without magnetostriction vibration, the yield on the outer peripheral side was only 10%, and the yield on the inner peripheral side was also only 50%.

In contrast, the yields on the outer peripheral side of the embodiments of nos. 1 to 7, in which the amorphous metal thin strip was subjected to mechanical processing while being magnetostrictively vibrated, were all 60% or more, and the yields on the inner peripheral side were all 80% or more, and the yields in all the embodiments were improved as compared with those of the comparative examples.

In particular, in the embodiment of No.1-4 in which the frequency of magnetostrictive vibration is 10 to 60kHz, the yield on the outer peripheral side is improved to 80% or more. Further, in the embodiment of No.1-3 having a frequency of 10 to 40kHz, the yield on the outer peripheral side is increased to 90% or more. Further, in the embodiments of Nos. 2 and 3 having the frequencies of 20 to 40kHz, the yield on the inner peripheral side was also improved to 100%.

Table 1 also shows whether or not heat generation of 40 ℃ or higher is caused by induction heating. The embodiment without heat generation at 40℃or higher is more likely to have a higher yield. The reason for this is considered that the magnetization follows the magnetic field when no heat is generated, and the vibration of the magnetic field is efficiently converted into a state of mechanical vibration. On the other hand, it is considered that when the frequency of the ac magnetic field increases, a large delay occurs in the response of magnetization to the magnetic field, that is, loss occurs, and the loss is released as heat. The generation loss is presumed to be that the energy of the applied magnetic field is not efficiently converted into the energy of the magnetostrictive vibration.

Fig. 9 is a photograph of the processed surface of the amorphous metal thin strip of No.2 of table 1. The multiplying power is 500 times. Fig. 10 is an enlarged photograph of fig. 9. The multiplying power is 3000 times. The upper side of the ribbon is shown on the outer peripheral side when wound around the spool. In the figure, a shear plane having a machining mark in a diagonal shape at the center in the thickness direction of the thin strip can be confirmed.

Fig. 11 is a schematic diagram of fig. 10. In the figure, B is a shear plane. B2 is a shearing surface in which a linear processing trace can be observed in the moving direction of the cutter blade, and B1 is a shearing surface in which the trace cannot be observed. Further, a is a collapse surface, C is a fracture surface, and D is a flash surface.

The amorphous metal thin strip according to the present embodiment is an amorphous metal thin strip having a shearing surface formed by machining on a machined surface of the thin strip, and has a corrugated profile on a sagging surface side of the surface of the thin strip on the machined surface.

The corrugated profile is formed with a period of 5.2 μm on average.

Further, in the processed surface, the shearing surface accounts for 70.4%.

In addition, the amorphous metal strip according to the present embodiment has a width of 45 μm throughout the photograph of fig. 10, and the contour on the sagging surface side of the shear surface has a relevant waviness with respect to the contour on the sagging surface side of the strip surface.

FIG. 12 is a photograph of the working face of the amorphous metal strip of comparative example No.8 of Table 1. The multiplying power is 500 times. Fig. 13 is an enlarged photograph of fig. 12. The multiplying power is 3000 times. In the figure, the upper side of the ribbon is the outer peripheral side when wound around the bobbin. In the figure, a shear plane having a machining mark in a diagonal shape at the center in the thickness direction of the thin strip can be confirmed.

Fig. 14 is a schematic view of fig. 13. In the figure, B is a shear plane. In addition, a is a collapse face, C is a fracture face, and D is a burr face.

Unlike the present embodiment, the amorphous metal ribbon for comparison has a flat profile on the sagging surface side of the ribbon surface, and is not corrugated. Further, the profile of the slash face side of the shear face is not a shape related to the profile of the slash face side of the thin strip surface.

In addition, the ratio of the shearing surface was 27.2%, which was very small.

Example 2

In example 2, the strength of the applied ac magnetic field was changed, and the machining yield was examined.

The amorphous metal ribbon was machined using the apparatus described in fig. 1. The frequency of magnetostrictive vibration was 30kHz. The alternating current was applied to the coils such that the maximum value of the alternating magnetic field generated in the coils became 30A/m, 70A/m, 100A/m, and 130A/m. In this case, the amorphous metal thin strip is magnetostrictive in magnetostriction of 12ppm, 16ppm, 18ppm, 19.8 ppm.

Except for this, the yield was examined under the same conditions as in embodiment 1.

In the embodiments of nos. 1 to 4 in which the amorphous metal thin strip was subjected to the mechanical processing while being magnetostrictive-vibrated in the range of the strength of the alternating-current magnetic field, the yield was all 60% or more on the outer circumference side, and all 70% or more on the inner circumference side, and the yield was improved in all embodiments as compared with the yield of the comparative example of No.8 in table 1.

In addition, in the range of the strength of the ac magnetic field, the higher the magnetic field strength is, the higher the machining yield tends to be.

TABLE 2

No	f(kHz)	H(A/m)	Out(％)	In(％)	Whether or not heat is generated
						1	30	30	60	70	Without any means for
2	30	70	70	80	Without any means for
						3	30	100	90	90	Without any means for
4	30	130	100	100	Without any means for

Example 3

The amorphous metal ribbon was machined using the apparatus described in fig. 1.

The same bobbin as in embodiment 1 is used for the bobbin 5. The slit amorphous metal strip 1 is wound 4 turns around the spool in the circumferential direction.

An alternating current of 30kHz was supplied from the alternating current power supply 3 to the amplifier 4, and the current was amplified by the amplifier 4, and the alternating current was supplied to the coil 2 so that the maximum value of the alternating magnetic field generated in the coil (14 turns) became 180A/m. In this case, the amorphous metal thin strip performs magnetostrictive vibration with magnetostriction of 24 ppm.

Except for this, the qualification rate of the machining was examined under the same conditions as in embodiment 1.

As a result, the 4 layers can be cut without generating cracks and fissures.

In comparison, the qualification rate of the machining was examined in a state where the coil 2 was not subjected to the alternating current and was not subjected to the magnetostrictive vibration, and the insertion of the cutting blade 6 into the amorphous metal thin strip was deteriorated, and cracks or cracks were generated in the 4 layers over a wide range, as compared with the above embodiment. The yield in the case of generating an ac magnetic field was 90%, and the yield in the case of not generating a magnetic field was 0%.

In examples 1 to 3, the amorphous metal thin ribbon having soft magnetic properties of the FeSiB type was used, but the amorphous metal thin ribbon capable of nanocrystalline was also saturated magnetostriction to the same extent before nanocrystalline, and therefore the same effect can be expected by applying the present invention.

In examples 1 to 3, the amorphous metal thin strip was subjected to machining provided with slits, and for example, it was also possible to cut or punch a long thin strip into a plurality of machined thin strips of the same shape and laminate them.

Example 4

In example 4, the amorphous metal thin strip according to the above embodiment was obtained (the amorphous metal thin strip was machined by locally applying vibration to the amorphous metal thin strip with a machining tool, and machining was performed on the portion to which the repetitive fatigue due to the vibration was applied).

Cooling by a roller to obtain an alloy with an alloy composition of Fe in atomic percent _81.5 Si ₄ B _14.5 Amorphous metal ribbon of (c). An amorphous metal ribbon having a thickness of 22.7 μm was prepared. The thickness of the ribbon is calculated from density, weight and dimensions (length x width). Further, the width of the thin strip was 80mm.

As the punching device, the device shown in fig. 3 was used.

As the punching die, superhard materials (VF-12 material manufactured by fuji die company, fuji-type), along with the

punches

8a and 8b and the

punch holders

9a and 9b, are used. The punching machine was a rectangular column with a rectangular front end, the dimension was 5×15mm, and the corner was subjected to R-angle treatment (R-section 0.3 mm). The die is formed with a machining hole inserted into the punch. Further, the

punches

8a, 8b and the

punch holders

9a, 9b hold the amorphous metal thin strip 1, respectively, and the

punches

8a, 8b vibrate in the thickness direction. The vibrations of the

punches

8a and 8b are ultrasonic vibrations caused by the ultrasonic generator. Further, the

punches

8a, 8b and the punch holders 9a,9 are slidable in the thickness direction of the amorphous metal thin strip.

The 1 amorphous metal strip is held by the

punch holders

9a, 9b and the

punches

8a, 8 b. In this state, the

punches

8a and 8b are ultrasonically vibrated, and repetitive fatigue due to vibration is applied to the amorphous metal strip at the punch holder and the sliding portion of the punch. Thereafter, the

punches

8a and 8b were operated under the load 1400N with the ultrasonic vibrations of the

punches

8a and 8b unchanged, and punching was performed. By using the machining method of machining the amorphous metal thin strip while vibrating the amorphous metal thin strip, an amorphous metal thin strip with machined side portions of the thin strip is obtained.

Fig. 15 is a photograph of the processed surface (side surface portion) of the amorphous metal thin strip obtained in example 4. The multiplying power is 500 times. Fig. 16 is a schematic view of fig. 15. In the figure, a shear plane having a machining mark in a diagonal shape at the center in the thickness direction of the thin strip can be confirmed.

The amorphous metal thin strip was machined to have a fracture surface of 73.4% of the area of the machined surface (side surface portion).

In comparison, a machined amorphous metal ribbon was obtained in the same manner as in example 4, except that the

punches

8a and 8b were not vibrated.

Fig. 17 is a photograph of the processed surface (side surface portion) of the obtained amorphous metal thin strip. Fig. 18 is a schematic diagram of fig. 17. In general, a cross section formed by punching is formed with a collapse surface a (oblique line portion), a shear surface B (vertical line portion), a fracture surface C (white portion), and a burr D (gray portion).

However, unlike the present embodiment, the amorphous metal ribbon for comparison has a flat profile on the sagging surface side of the ribbon surface, and is not corrugated. In addition, the ratio of the fracture surface to the processed surface is less than 70% (46.2%), which is very small. The ratio of the shearing surface to the processed surface was 48.0%.

In example 4, the amorphous metal thin ribbon having soft magnetic properties of the FeSiB type was used, but the amorphous metal thin ribbon capable of nanocrystalline was expected to have similar effects by applying the present invention.

In the above embodiment, the method of performing punching processing by stopping ultrasonic vibration of the

punches

8a and 8b after repeated fatigue due to vibration is applied to the amorphous metal strip, that is, performing machining after vibrating the amorphous metal strip can also be applied.

Description of the reference numerals

1: amorphous metal ribbon

2: coil

3: AC power supply

4: amplifier

5: spool

6: machining tool

7: unreeling roller

8: punching machine

9: punching frame

10: cracking of

11: crack and crack

12: cutting trace

A: slough surface

B: shear plane

C: fracture surface

D: and (5) a rough edge surface.

Claims

1. A processing method of an amorphous metal ribbon is characterized in that:

the amorphous metal ribbon has a saturation magnetostriction of 5ppm or more and a Vickers hardness HV of 700 or more,

and (3) performing cutting or punching after vibrating the amorphous metal strip, or performing cutting or punching while vibrating the amorphous metal strip.

2. The method of processing an amorphous metal ribbon as defined by claim 1, wherein:

the vibration is a vibration caused by magnetostriction of the amorphous metal ribbon.

3. The method of processing an amorphous metal ribbon as defined by claim 1, wherein:

The frequency of the vibration is 1 Hz-500 kHz.

4. The method of processing an amorphous metal ribbon as defined by claim 2, wherein:

the vibration is generated by applying an alternating magnetic field of 1A/m or more to the amorphous metal thin strip.

5. A method of processing an amorphous metal ribbon as defined by claim 3 wherein:

6. The method of processing an amorphous metal ribbon as defined by claim 1, wherein:

with respect to the amorphous metal thin strip, a cutting process or a punching process is performed on a portion to which vibration is locally applied by a processing tool.

7. The method of processing an amorphous metal ribbon as defined by claim 6, wherein:

the processing tool comprises a puncher and a punching frame which can clamp the upper surface and the lower surface of the amorphous metal thin strip,

at least one of the punch and punch holder is capable of sliding in a thickness direction of the amorphous metal thin strip,

and a punch holder for holding the upper and lower surfaces of the amorphous metal strip, wherein at least one of the upper and lower surfaces is vibrated in the thickness direction, vibration is applied to the amorphous metal strip at a portion of the amorphous metal strip located at a sliding portion of the punch holder, and punching is performed by the punch on the portion subjected to repeated fatigue by the vibration.

8. The method of processing an amorphous metal strip according to any one of claims 1 to 7, wherein:

the amorphous metal ribbon is a strip-shaped ribbon,

and carrying out cutting or punching processing while conveying the amorphous metal thin strip in the strip direction.

9. The method of processing an amorphous metal strip according to any one of claims 1 to 7, wherein:

the amorphous metal ribbon is composed mainly of Fe produced by roll cooling.

10. The method of processing an amorphous metal strip according to any one of claims 1 to 7, wherein:

the thickness of the amorphous metal ribbon is 5 μm to 70 μm.

11. A method for producing a laminate is characterized by comprising:

an amorphous metal thin strip processed by the processing method of an amorphous metal thin strip according to any one of claims 1 to 10 is laminated.

12. An amorphous metal thin strip processed by the processing method of an amorphous metal thin strip according to any one of claims 1 to 10, having a shearing face formed by cutting or punching on a processed face of the thin strip, characterized in that:

The profile of the sagging surface side of the thin strip surface has a corrugated shape on the working surface.

13. The amorphous metal ribbon of claim 12, wherein:

the corrugated profile has irregularities at a period of 0.1 to 20 μm on average.

14. The amorphous metal ribbon of claim 12, wherein:

in the processed surface, the shearing surface occupies 40% or more of the area.

15. The amorphous metal ribbon of claim 13, wherein:

16. The amorphous metal ribbon of any one of claims 12-15, wherein:

the profile of the slash face side of the shear face has an associated corrugation relative to the profile of the slash face side of the ribbon surface.

17. An amorphous metal thin strip processed by the processing method of an amorphous metal thin strip according to any one of claims 1 to 10, having a shearing face formed by cutting processing or punching processing on a processed face of the thin strip, the amorphous metal thin strip characterized in that:

and the fracture surface of the processed surface of the thin strip after cutting or punching accounts for more than 50 percent of the area.