WO2019208651A1 - Amorphous metal ribbon, method for processing same, and method for producing laminate - Google Patents

Abstract

Provided is a method capable of suppressing the generation of cracks or fractures in an amorphous metal ribbon during machining of the amorphous metal ribbon. Also provided is a method for processing an amorphous metal ribbon, wherein the amorphous metal ribbon is machined after being vibrated or while being vibrated. Specifically, in the method for processing an amorphous metal ribbon, the amorphous metal ribbon has a saturation magnetostriction of at least 1 ppm, and the vibration is caused by magnetostriction of the amorphous metal ribbon. Alternatively, in the amorphous metal ribbon, a portion locally vibrated by a machining tool is machined.

Description

Amorphous metal ribbon, processing method thereof, and manufacturing method of laminated body

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

Amorphous metal ribbon is used in various fields. For example, amorphous metal ribbons having soft magnetism are used in fields such as information equipment, automobiles, home appliances / consumer equipment, industrial machinery, and specifically, rotating machines, reactors, power transformers, It is used as a material useful for improving efficiency and gain of noise countermeasure parts, magnetic antennas, and the like.

Amorphous metal ribbons are generally known to have high hardness and low ductility. For example, an amorphous metal ribbon having soft magnetism is usually produced in a long and strip shape by molten metal quenching method such as a single roll method. The mainstream thickness of the ribbon is 5 to 70 μm. These metal ribbons have a Vickers hardness HV of 500 or more. Therefore, amorphous metal ribbons have the disadvantage that machining is extremely difficult.
Conventionally, these amorphous metal ribbons have been mainly applied to wound cores wound in a toroidal shape that can be manufactured almost without machining. In recent years, in addition to a wound magnetic core, it has been studied to laminate an amorphous metal ribbon and use it as a magnetic member such as a rotating machine, a reactor, and an antenna.

Amorphous metal ribbons are manufactured in the form of ribbons. Therefore, when laminating amorphous metal ribbons into a laminate, the amorphous metal ribbons are processed into a predetermined shape. Then, a process of laminating them may be taken. Examples of means for processing the amorphous metal ribbon into a predetermined shape include etching processing, electric discharge processing, and laser processing. However, these processing methods have extremely low processing efficiency and have problems in industrial production. In addition, since the amorphous metal ribbon is brittle, the occurrence of cracks and cracks cannot be avoided, and there is a problem that the processing yield is poor.

加工 The versatile processing means for amorphous metal ribbons is also mechanical processing such as punching or cutting that moves a mold or processing tool in the thickness direction. However, in machining using an amorphous metal ribbon as a workpiece, cracks and cracks are more likely to occur than in the above-described processing method.

As a countermeasure, for example, Patent Document 1 is an invention based on the premise that punching is performed on an amorphous metal ribbon, and a laminated plate in which a plurality of soft magnetic metal ribbons having a thickness of 8 to 35 μm are laminated. And forming a thermosetting resin with a predetermined thickness between the metal ribbons is disclosed. Further, it is described that as an effect thereof, the punching processability is excellent and a high-performance laminate can be easily provided.

JP 2008-213410 A

However, as a countermeasure against cracks and cracks, it is necessary to consider not only a study of reinforcing mechanical strength with a member other than the amorphous metal ribbon as in Patent Document 1, but also a measure for improving the machining itself.

課題 An object of the present invention is to provide a method capable of suppressing cracks and cracks generated in an amorphous metal ribbon in machining an amorphous metal ribbon. Moreover, it is providing the manufacturing method of a laminated body using the amorphous metal ribbon. Moreover, it is providing the amorphous metal ribbon obtained by the machining.

The present invention is a method of processing an amorphous metal ribbon,
The amorphous metal ribbon is machined after being vibrated or while being vibrated.

In the present invention, the amorphous metal ribbon has a saturation magnetostriction of 1 ppm or more, and the vibration can be a vibration due to the magnetostriction of the amorphous metal ribbon.
The frequency of the vibration may be 1 Hz or more and 500 kHz or less.
The vibration can be generated by applying an AC magnetic field of 1 A / m or more to the amorphous metal ribbon.
The amorphous metal ribbon is a long strip, and can be machined while the amorphous metal ribbon is conveyed in the long direction.

In the present invention,
A portion of the amorphous metal ribbon that is locally vibrated by a processing tool can be machined.
The processing tool includes a puncher and a punch frame that can sandwich the upper and lower surfaces of the amorphous metal ribbon, and at least one of the puncher and the punch frame slides in the thickness direction of the amorphous metal ribbon. The puncher and the punch frame sandwich the upper and lower surfaces of the amorphous metal ribbon, and at least one of them vibrates in the thickness direction, so that the amorphous metal ribbon It is a processing method in which the amorphous metal ribbon is vibrated at a portion located in the sliding portion between the puncher and the punch frame, and a portion subjected to repeated fatigue by the vibration is punched by the puncher. it can.

As the amorphous metal ribbon, one having Fe as a main component produced by roll cooling can be used.
The amorphous metal ribbon may have a thickness of 5 μm to 70 μm.
As the amorphous metal ribbon, one having a Vickers hardness HV of 500 or more can be used.

非晶 質 Amorphous metal ribbons processed by these amorphous metal ribbon processing methods can be laminated to form a laminate.

By the above amorphous metal ribbon processing method, the following amorphous metal ribbon of the present invention is obtained.
An amorphous metal ribbon having a machined shear surface on a processing surface of the ribbon, wherein a contour of the sag surface side of the surface of the ribbon has a corrugated shape.
The corrugated contour may have irregularities with an average period of 0.1 to 20 μm.
Further, in the processed surface, the shear surface may occupy an area of 40% or more.
Further, the outline on the sag surface side of the shear plane may correlate with the outline on the sag surface side of the ribbon surface.

Another amorphous metal ribbon of the present invention is as follows.
An amorphous metal ribbon having a machined shear surface on the processing surface of the ribbon,
An amorphous metal ribbon in which a fracture surface occupies an area of 50% or more on the machined surface of the machined ribbon.

に よ According to the present invention, it is possible to suppress cracks and cracks generated in the amorphous metal ribbon in the machining of the amorphous metal ribbon. Therefore, a machined amorphous metal ribbon with high dimensional accuracy can be obtained, and further, a laminated body obtained by laminating it can be obtained.

It is a schematic diagram of the processing apparatus used for this invention. It is a schematic diagram of another processing apparatus used for this invention. It is a schematic diagram of another processing apparatus used for this invention. It is a schematic diagram of another processing apparatus used for this invention. It is a schematic diagram of the amorphous metal ribbon after machining without cracks and cracks determined to be acceptable. It is a schematic diagram of the amorphous metal ribbon after the machining which has the crack and the crack judged to be unacceptable. It is a BH loop which shows the soft magnetic characteristic of the amorphous metal ribbon used in the embodiment. It is the figure which expanded a part of horizontal axis of FIG. It is a photograph of the processed surface of the amorphous metal ribbon (Table 1 No. 2) of Example 1. It is an enlarged photograph of FIG. It is a schematic diagram of FIG. It is a photograph of the processed surface of a comparative amorphous metal ribbon (Table 1 No. 8). It is an enlarged photograph of FIG. FIG. 14 is a schematic diagram of FIG. 13. It is a photograph of the processed surface of the amorphous metal ribbon of Example 4. FIG. 16 is a schematic diagram of FIG. 15. It is a photograph of the processed surface of another amorphous metal ribbon for comparison. It is a schematic diagram of FIG.

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

An embodiment of the present invention is a processing method of an amorphous metal ribbon,
The amorphous metal ribbon is machined after being vibrated or while being vibrated.
An amorphous metal ribbon is a material with extremely high fracture toughness. Therefore, when the thin ribbon starts to break by machining, a large plastic deformation occurs at the tip of the fracture crack, and as a result, a large impact is generated between the amorphous metal ribbon and the processing tool. In addition, since the amorphous metal ribbon has extremely high hardness as described above, cracks and cracks are likely to occur at the cut site due to the impact. In particular, when processing into a complicated shape, cracks and cracks are likely to occur at corner portions having a small curvature.
However, in this invention, it discovered that the problem could be suppressed by employ | adopting said processing method.

Hereinafter, the mechanism by which the effect of the present invention is obtained will be inferred.
In general, glass cutting often employs a processing method mainly for elastic fracture in which a crack is propagated from a scratch scratch on the surface. Since the arrangement of atoms in the entire glass mainly consists of shared electronic bonds, and the glass is hard at any part, the above processing method can be adopted.
The amorphous metal ribbon has a random arrangement of atoms, similar to glass, as it is called metal glass. However, unlike general glass, the transition form between transition metals (for example, between Fe and Fe) is mainly a metal bond, but a bond containing a semimetal (metalloid element) becomes a covalent electron bond, and is at the atomic level of a ribbon. The hardness varies depending on the location. Also, in metal (alloy), there are many spaces (lattice defects in crystal phase) where atoms called free volumes existed, and atoms can move through these free volumes, allowing large plastic deformation. . On the other hand, the surface of the ribbon has a feature that there is no free volume and it is very hard. Therefore, it is presumed that the amorphous metal ribbon is difficult to apply the same processing method as glass, and needs to be machined by shear deformation.
Accordingly, the present inventor has conceived a processing method in which the amorphous metal ribbon is vibrated or machined while being vibrated. Here, “machining while vibrating the amorphous metal ribbon” includes machining the amorphous metal ribbon while vibrating the processing tool.

The above processing methods are considered to obtain the following effects (1) to (3).
(1) The brittleness of the amorphous metal ribbon can be increased by vibrating the amorphous metal ribbon. Therefore, by performing machining after vibration, workability can be improved with respect to those that are not vibrated.
(2) The brittleness of the amorphous metal ribbon can be increased by vibrating the amorphous metal ribbon. Therefore, by performing machining while vibrating the processing tool, that is, by performing machining while vibrating the amorphous metal ribbon, workability can be improved with respect to those that do not vibrate.
(3) Since the amorphous metal ribbon is machined while being vibrated, the amorphous metal ribbon vibrates relatively when the processing tool comes into contact, so the amorphous metal ribbon is hard. Machining starts in the same state as the surface is polished, and high-precision processing is possible. After that, the inside of the ribbon is shear deformed by machining.

When a sharp cutting blade is used as the processing tool, the cutting blade is normally pressed against the workpiece and is cut by relatively moving in that state. In this case, it is necessary to move the cutting blade and the workpiece by a predetermined distance in a predetermined direction. Also, it is extremely difficult to process curves and complex shapes.
When using vibration as in the present invention, it is known that the cutting edge of the cutting blade is microscopic saw-shaped, and such a cutting blade and an amorphous metal ribbon are relatively When it vibrates, a notch can be generated on the surface of the non-work piece without moving the work piece and the cutting blade over a relatively long distance.

In addition, the present invention can be expected to have the effect of extending the life of the machining tool as a secondary effect. Since the press-fitting speed is suppressed, the impact when striking against the hard ribbon surface is greatly reduced.

In the present invention, machining refers to a known machining method for machining a workpiece using a machining tool or a machine tool. For example, punching, shearing, cutting, slitting, and the like are applicable.

Hereinafter, a specific method for processing an amorphous metal ribbon will be described.
In an embodiment of the present invention, the amorphous metal ribbon has a saturation magnetostriction of 1 ppm or more, and the vibration may be a vibration due to the magnetostriction of the amorphous metal ribbon.

The feature of this processing method is that the amorphous metal ribbon is not vibrated by an external stress, but an alternating magnetic field is applied to vibrate the ribbon by magnetostriction. By vibrating in this way, it is possible to easily vibrate only the amorphous metal ribbon. Therefore, it is possible to vibrate the workpiece with less energy than to vibrate the machining tool. Further, since the amorphous metal ribbon itself becomes a vibration source, it can be vibrated reliably, and the effect of suppressing cracks and cracks can be enhanced. In other words, when processing a laminate of amorphous metal ribbons with resin sandwiched between them, vibration is absorbed by the resin when it is vibrated by external stress, and the amorphous material inside in the stacking direction is absorbed. Although there is a possibility that sufficient vibration is not imparted to the metal ribbon, even with such a workpiece, the amorphous metal ribbon can be vibrated, and the crack and crack suppression effect of the present invention can be obtained. Cheap.
The processing method is characterized in that the amorphous metal ribbon is vibrated in a plurality of directions. In this embodiment, since the amorphous metal ribbon is vibrated by magnetostriction, vibration due to compression / expansion occurs in the direction in which the magnetic field is applied, and vibration due to expansion / compression in the direction perpendicular to the direction in which the magnetic field is applied. Occur simultaneously. In other words, no matter what direction the processing tool and the amorphous metal ribbon come into contact with each other, the two will stably slide relative to each other rather than vibration in a single direction. It is easy to obtain a suppression effect.

In addition, this processing method is easier to process than conventional machining. The reason is described below.
Many amorphous metal ribbons are often produced by roll quenching from the viewpoint of industrial productivity. Roll quenching is a method in which a liquid metal in a molten state is placed on a roll made of a metal having a high thermal conductivity (for example, a Cu alloy), closely adhered, and rapidly solidified. Since an extremely high cooling rate of about 1 × 10 ⁵ to 1 × 10 ⁷ ° C./s is obtained, roll quenching is widely applied as a method for casting an amorphous metal ribbon.
However, since the molten metal is solidified in an extremely short time, the surface of the ribbon is likely to be uneven, reflecting partial non-uniform cooling rates. When laminating these strips and punching them simultaneously, the projections on the surface of one of the strips are easy to come into contact with the opposing strip surface and are not likely to slip in the in-plane direction. However, since the recesses are likely to slip, the stress from the processing tool is dispersed, and it is difficult to process along the shape of the cutting tool blade.
In particular, the amorphous metal ribbon has high hardness, so it is necessary to increase the relative speed with the processing tool during machining, but the amorphous metal ribbon is broken so as to be torn off. Defects that are off the cutting line occur.
In the processing method of the amorphous metal ribbon according to the present embodiment, since the ribbon is machined in a vibrating state, when both of them move relatively and positively, a fine notch is formed from a portion where the processing tool contacts. Generated, and shear deformation can be advanced from there. For this reason, the portion having the thin-band concave portion is also fixed by the restraining force of the portion where the surrounding restraint is strong, and the cutting becomes easy.

In this embodiment, an amorphous metal ribbon having a saturation magnetostriction of 1 ppm or more is used. If the saturation magnetostriction is less than 1 ppm, sufficient vibration does not occur and the effects of the present invention are difficult to obtain. The saturation magnetostriction is preferably 3 ppm or more, more preferably 5 ppm or more, more preferably 10 ppm or more, and more preferably 15 ppm or more.

The vibration preferably has a frequency of 1 Hz to 500 kHz. If the frequency is less than 1 Hz or more than 500 kHz, it is difficult to obtain a crack or crack suppression effect.
The lower limit of the frequency is preferably 10 Hz, more preferably 100 Hz, and more preferably 1 kHz. The upper limit of the frequency is preferably 400 kHz, more preferably 300 kHz, more preferably 80 kHz, more preferably 60 kHz, and more preferably 40 kHz.

The vibration is preferably generated by applying an AC magnetic field of 1 A / m or more to the amorphous metal ribbon. When the lower limit value of the alternating magnetic field is less than 1 A / m, it is difficult to obtain a crack or crack suppression effect.
The lower limit of the AC magnetic field is preferably 10 A / m, more preferably 30 A / m, more preferably 70 A / m, more preferably 100 A / m, and more preferably 130 A / m.

Further, the amorphous metal ribbon is in the form of a long band, and can be machined while the amorphous metal ribbon is conveyed in the long direction. In addition, when performing machining while transporting, it is possible to continuously perform machining by stopping the movement of the amorphous metal ribbon during machining and restarting the movement after machining. .
It is known that the ribbon being transported is easily broken. When the ribbon is vibrated by an external stress, there is a concern that the ribbon being transported is more likely to break around the place where the stress is applied. On the other hand, when vibrating 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. It can control that a ribbon is cut.

In the present invention, the object of the workpiece is limited to the amorphous metal ribbon, but the processing method of the present embodiment is not limited thereto, and has a magnetostriction other than the amorphous metal ribbon. Even if it is a material, the effect of suppressing cracks and cracks can be obtained.
That is, as another invention, a metal ribbon or a machining method of a metal ribbon that performs machining while applying vibration to at least one of the processing tools used for processing,
The metal ribbon has a saturated magnetostriction of 1 ppm or more, and the vibration can be caused by the magnetostriction of the metal ribbon, thereby providing a method for processing the metal ribbon having the same effect as the present invention. .

By the amorphous metal ribbon processing method described above, the amorphous metal ribbon of the following embodiment can be obtained.
The amorphous metal ribbon of the present embodiment is an amorphous metal ribbon having a sheared surface by machining on the processed surface of the ribbon, and in the processed surface, the outline on the sagging surface side of the surface of the ribbon is Wave type. Note that the processed surface corresponds to a punched surface (side surface) or a cut surface (cut surface) in punching or cutting.
Specifically, the corrugated contour may have irregularities with an average period of 0.1 to 20 μm. As described above, the reason why the irregularities exist with a period of 0.1 to 20 μm is estimated as follows. In this magnetostrictive vibration method, the polarity of the magnetic field is switched at a period of several tens of kHz. That is, the positive magnetization state and the negative magnetization state are switched at a high frequency. In the magnetized state, the magnetostriction increases, and in the state where the magnetization is zero, the magnetostriction is zero. This high-speed magnetization reversal is caused by the domain wall movement, and the domain wall has the smallest magnetostriction. In order to follow high-speed magnetization reversal, the domain width (the interval between the domain walls and the domain walls, which is about twice the domain wall travel distance) is 0.2 to 40 μm. It is expected that the blade is moved in a saw-like manner by moving the domain wall having a different volume and the circumference while being pressed from the upper surface by the blade. The method for measuring the average period of the unevenness is to measure at least five intervals between the deepest portions of adjacent recesses, and measure the average value of the intervals. In addition, an unevenness | corrugation makes one unevenness | corrugation what has a difference of 0.3 micrometer or more by the height of the thickness direction of the thin strip of a recessed part and a convex part.
Further, in the amorphous metal ribbon of the present embodiment, the sheared surface may occupy an area of 40% or more in the processed surface. The shear surface may occupy an area of 50% or more, further 60% or more, and even 65% or more. In addition, the numerical value of the area which the shear surface in a processing surface occupies can be calculated with the following measuring method. First, the thickness T (T1, T2,... Tn) of the ribbon and the width W (w1, w2,... Wn) of the shear surface are measured at arbitrary plural positions on the processed surface. Thereafter, wsum / Tsum × 100 (%) is calculated from the total sum Tsum from T1 to Tn and the total sum Wsum from w1 to w2. In the present embodiment, the above numerical values were calculated with five arbitrary measurement points in the range of the processed surface width of 450 μm.
In addition, the amorphous metal ribbon of the present embodiment may have a corrugated shape in which the outline on the sag surface side of the shear plane correlates with the outline on the sag surface side of the surface of the ribbon on the processed surface. Correlated corrugations refer to those in which fluctuations in the period of unevenness (interval between the deepest portions of adjacent recesses) appear in the same way in the contours of both. As described above, the reason why there is a correlation between the corrugated contours of both is estimated as follows. As described above, the origin of this periodicity can be considered to depend on the distance between the domain walls. The magnetostriction seen here is linear magnetostriction, and the region of the magnetostriction state different from the vicinity in the vicinity of the domain wall is spread in the vertical direction. It is thought that the contours of both are very similar because of repeated volume fluctuations.

Another embodiment of the method for processing an amorphous metal ribbon of the present invention will be described. In this embodiment, a means for machining a portion of the amorphous metal ribbon that is locally vibrated by a processing tool is used.
According to this embodiment, since the part which improved the brittleness is machined, workability can be improved and the effect of suppressing cracks and cracks can be easily obtained.

In this embodiment, for example, the processing tool includes a puncher and a punch frame that can sandwich the upper and lower surfaces of the amorphous metal ribbon,
At least one of the puncher and the punch frame is slidable in the thickness direction of the amorphous metal ribbon,
The puncher and the punch frame sandwich the upper and lower surfaces of the amorphous metal ribbon, and at least one of them vibrates in the thickness direction, whereby the puncher and the punch frame of the amorphous metal ribbon slide. It is possible to employ a process in which the amorphous metal ribbon is vibrated at a portion located in the portion, and a portion subjected to repeated fatigue by vibration is punched by the puncher.

According to this embodiment, the following amorphous metal ribbon is obtained.
The amorphous metal ribbon of the present embodiment is an amorphous metal ribbon having a machined shear surface on the processed surface of the ribbon, and the fracture surface has a fracture surface of 50 on the processed surface of the machined ribbon. Occupies more than% area. The fracture surface may occupy an area of 60% or more and even 65%.
In addition, the numerical value of the area which the torn surface in a processing surface occupies can be calculated with the following measuring method. First, the thickness T (T1, T2,... Tn) of the ribbon and the width W (W1, W2,... Wn) of the fracture surface are measured at arbitrary plural positions on the processed surface. After that, Wsum / Tsum × 100 (%) is calculated from the total sum Tsum from T1 to Tn and the total sum Wsum from W1 to W2. In the present embodiment, the above numerical values were calculated with five arbitrary measurement points in the range of the processed surface width of 450 μm.

Hereinafter, the amorphous metal ribbon used in this embodiment will be described.
The means for producing the amorphous metal ribbon is not particularly limited.
For example, a material mainly composed of Fe manufactured by roll cooling can be used. In addition, a main component is a component with most content.

In the amorphous metal ribbon of this embodiment, for example, when the total amount of Fe, Si, and B is 100 atomic%, Si is 0 atomic% or more and 10 atomic% or less, and B is 10 atomic% or more 20 What has the composition which is atomic% or less and the remainder occupies Fe can be used.
When the amount of Si and the amount of B are out of this range, it is difficult to obtain an amorphous alloy when manufacturing by roll cooling, or mass productivity is likely to be lowered. As additives or inevitable impurities, elements other than Fe, Si, and B, such as Mn, S, C, and Al may be included. The amorphous metal ribbon preferably has the above-described composition, is amorphous (amorphous) having no crystal structure, and is preferably a soft magnetic material. The Si amount is preferably 3 atomic% or more and 10 atomic% or less. Further, the amount of B is preferably 10 atomic% or more and 15 atomic% or less. In order to obtain a high saturation magnetic flux density Bs, the Fe content is preferably 78 atomic% or more, more preferably 79.5 atomic% or more, further 80 atomic% or more, and even more preferably 81 atomic% or more. The amorphous metal ribbon can contain inevitable impurities, but the total ratio of Fe, Si and B is preferably 95% by mass or more, and more preferably 98% by mass or more. preferable. The amorphous metal ribbon may be referred to as an amorphous alloy ribbon, or may be referred to as an amorphous alloy ribbon, a soft magnetic amorphous alloy ribbon, or the like.
The amorphous metal ribbon having the above composition has a saturation magnetostriction of 5 ppm or more and a Vickers hardness HV of 700 or more.

An amorphous metal ribbon that can be nanocrystallized can also be used. As an amorphous metal ribbon capable of nanocrystallization, an Fe-based one can be used. Specifically, as an amorphous alloy ribbon Fe group, the general _{formula: (Fe 1-a M a} ) 100-xyz-α-β-γ Cu x Si y B z M 'α M "β X γ ( atomic% (However, M is Co and / or Ni, and M ′ is at least one element selected from the group consisting of Nb, Mo, Ta, Ti, Zr, Hf, V, Cr, Mn, and W, M "Is at least one element selected from the group consisting of Al, platinum group elements, Sc, rare earth elements, Zn, Sn, Re, and X is C, Ge, P, Ga, Sb, In, Be, As. At least one element selected from the group, a, x, y, z, α, β and γ is 0 ≦ a ≦ 0.5, 0.1 ≦ x ≦ 3, 0 ≦ y ≦ 30, 0 ≦, respectively. z ≦ 25, 5 ≦ y + z ≦ 30, 0 ≦ α ≦ 20, 0 ≦ β ≦ 20 and 0 ≦ γ ≦ 20). You can. Preferably, in the above general formula, a, x, y, z, α, β, and γ are 0 ≦ a ≦ 0.1, 0.7 ≦ x ≦ 1.3, 12 ≦ y ≦ 17, and 5 ≦, respectively. This is a range satisfying z ≦ 10, 1.5 ≦ α ≦ 5, 0 ≦ β ≦ 1 and 0 ≦ γ ≦ 1.
The amorphous metal ribbon having the above composition has a saturation magnetostriction of 5 ppm or more and a Vickers hardness HV of 700 or more.

The amorphous metal ribbon can be nanocrystallized by subjecting the amorphous metal ribbon capable of nanocrystallization to a heat treatment at a temperature higher than the crystallization start temperature.
The nanocrystallized alloy is at least 50% by volume, and further 80% by volume, is occupied by fine crystal grains having an average grain size measured at the maximum dimension of 100 nm or less. In the alloy, the portion other than the fine crystal grains is mainly amorphous. The proportion of fine crystal grains can be substantially 100% by volume.

合金 A long amorphous metal ribbon can be obtained by melting an alloy having these compositions to a melting point or higher and rapidly solidifying the alloy by a roll method.

Amorphous metal ribbons having a thickness of 5 μm or more and 70 μm or less can be used. When the thickness is less than 5 μm, the mechanical strength of the amorphous metal ribbon becomes insufficient, and handling during machining and continuous conveyance in the longitudinal direction tend to be difficult. The thickness is preferably 15 μm or more, and more preferably 20 μm or more. On the other hand, when the thickness of the ribbon exceeds 70 μm, depending on the composition, it tends to be difficult to stably obtain an amorphous phase in the ribbon. The thickness is preferably 50 μm or less, more preferably 35 μm or less, and more preferably 30 μm or less.

An apparatus according to an embodiment when performing machining will be described.
For example, the apparatus described in FIGS. 1, 2, and 3 can be used. However, the apparatus which can be used for this invention is not limited to these.

The apparatus of FIG. 1 is a schematic diagram of an apparatus for applying to the amorphous metal ribbon processing method of the embodiment (machining while vibrating an amorphous metal ribbon having magnetostriction by magnetostriction).
The apparatus shown in FIG. 1 includes an amorphous metal ribbon 1, a coil 2 wound so that a magnetic flux flows through the amorphous metal ribbon 1, and a process capable of machining the amorphous metal ribbon 1. A tool 6 is provided. The coil 2 is supplied with an alternating current that is amplified by the amplifier 4 and flows from the alternating current power source 3.
In the embodiment of FIG. 1, a long amorphous metal ribbon 1 is wound in a circumferential direction on an annular bobbin 5 having at least an outer peripheral side having flexibility. The processing tool 6 is a cutting blade. The processing tool 6 can move in the radial direction of the bobbin 5, and when moved to the bobbin side, the tip of the cutting blade can come into contact with the amorphous metal ribbon 1 wound around the peripheral surface of the bobbin 5. It is. Further, the bobbin 5 is configured to be able to move to the inner diameter side from the outer peripheral surface of the bobbin by biting into a material having flexibility on the outer peripheral side of the bobbin 5.

述 べ る A method of using the apparatus shown in Fig. 1 will be described. By passing an alternating current through the coil 2, an alternating magnetic field is generated in the axial direction of the coil, an alternating magnetic flux is passed through the amorphous metal ribbon 1 disposed inside the coil, and the amorphous metal ribbon 1 is magnetostricted. Vibrate. While maintaining this state, the tip of the cutting blade 6 is pressed against the surface of the amorphous metal ribbon 1, so that the amorphous metal ribbon 1 is subjected to machining such as cutting, slitting and punching.

Note that, in the embodiment of FIG. 1, the amorphous metal ribbon 1 wound around the bobbin does not have to be in an annular shape, and may have an arc shape. In that case, a yoke for returning the magnetic flux flowing through the amorphous metal ribbon may be used.

The apparatus of FIG. 2 is another apparatus for applying to the amorphous metal ribbon processing method of the embodiment (machining while magnetostrictively oscillating an amorphous metal ribbon having magnetostriction) as in FIG. FIG.
The apparatus of FIG. 2 machined amorphous metal ribbon 1, coil 2 wound so that magnetic flux flows through amorphous metal ribbon 1, and amorphous metal ribbon 1, as in FIG. 1. A processing tool capable of performing the above is provided.
In the embodiment of FIG. 2, in the drawing, 6a is a puncher for punching, and 6b is a punching frame for punching. A part of the long amorphous metal ribbon 1 is disposed at a position where it can be punched with the processing tools 6a and 6b. In the figure, a long amorphous metal ribbon 1 is unwound from an unwinding roll 7 and conveyed to the processing tools 6a and 6b. The processing tools 6a and 6b perform a punching process on the transported amorphous metal ribbon 1. Thereby, it is possible to perform machining while continuously transporting the amorphous metal ribbon 1.
In the drawing, the coil 2 is formed so that its axial direction is parallel to the longitudinal direction of the amorphous metal ribbon 1.
The AC power supply 3 and the amplifier 4 have the same configuration as that shown in FIG.

述 べ る A method of using the apparatus shown in Fig. 2 will be described. As in FIG. 1, by passing an alternating current through the coil 2, an alternating magnetic field is generated in the axial direction of the coil, an alternating magnetic flux is passed through the amorphous metal ribbon 1 disposed inside the coil, and amorphous. The metal ribbon 1 is vibrated magnetostrictively. While maintaining the state, the punching is performed by sliding the processing tools 6a and 6b.

In the embodiment of FIG. 2, the yoke 8 for returning the magnetic flux flowing through the amorphous metal ribbon is used.

The apparatus of FIG. 3 is applied to the amorphous metal ribbon processing method of the embodiment (a processing method for machining a portion of the amorphous metal ribbon that is locally vibrated by a processing tool). It is a schematic diagram of the apparatus for. A portion subjected to vibration becomes brittle due to repeated fatigue. Therefore, machining becomes easy.
The apparatus shown in FIG. 3 includes an amorphous metal ribbon 1 and a processing tool capable of machining the amorphous metal ribbon 1. The processing tool includes punchers 8a and 8b and punch frames 9a and 9b that can sandwich the upper and lower surfaces of the amorphous metal ribbon.

A method of using the apparatus shown in FIG. 3 will be described. Both the punchers 8a and 8b and the punch frames 9a and 9b are slidable in the thickness direction of the amorphous metal ribbon. The punchers 8a and 8b and the punch frames 9a and 9b sandwich the amorphous metal ribbon 1, and at least one of them vibrates in the thickness direction (in FIG. 3, the arrows of the punch frames 9a and 9b indicate vibration). By doing so, the amorphous metal ribbon is vibrated at the portion located at the sliding portion between the punchers 8a and 8b and the punch frames 9a and 9b, and fatigue is repeatedly given by the vibration. After that, as shown in FIG. 4, the punchers 8a and 8b move in the thickness direction of the amorphous metal ribbon, so that the amorphous metal ribbon 1 is stamped at a site where repeated fatigue is given. Applied.
The unwinding roll 7 and the amorphous metal ribbon 1 have the same configuration as that shown in FIG.

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

As a means for applying vibration to at least one of the amorphous metal ribbon or the processing tool used for the processing, an ultrasonic generator or the like can be used in addition to the magnetostrictive vibration by the coil. A known ultrasonic generator can be used, and is not particularly limited.

In the amorphous metal ribbon processing method described above, the amorphous metal ribbon is machined with a resin applied or a resin sheet adhered to at least one surface of the amorphous metal ribbon. Can also be applied.

非晶 質 Amorphous metal ribbons processed by the amorphous metal ribbon processing method described above can be laminated to form a laminate.

Example 1
The amorphous metal ribbon was machined by the apparatus shown in FIG. Specifically, it was performed under the following conditions.
The amorphous metal ribbon used was slit to a width of 25 mm.
An amorphous metal ribbon having a composition of Fe: 82 atomic%, Si: 4 atomic%, and B: 14 atomic% with Fe, Si, and B being 100 atomic% was used. In addition, inevitable impurities, such as Cu and Mn, are 0.5 mass% or less.
This amorphous metal ribbon has a thickness of 20 μm, a saturation magnetostriction of 27 ppm, and a Vickers hardness HV of 800.
An amorphous metal ribbon of this composition is also known to have a high magnetic permeability as a soft magnetic material, and can easily follow the magnetization of an alternating magnetic field, and can vibrate the magnetic material itself through the magnetization process. Is possible.

A cutting blade having a sharp tip was used as the processing tool 6.
The bobbin 5 used a paper tube. Since the outer circumference side of the paper tube has flexibility, the tip of the cutting blade can be bitten into the inner circumference side of the outer diameter portion. The outer diameter of the bobbin is 100 mm.
The slit amorphous metal ribbon 1 was wound twice in the circumferential direction of the bobbin. The magnetic path length of the wound amorphous metal ribbon 1 is about 0.314 m.

The number of turns of the coil 2 was 10. An AC current of 10 kHz to 200 kHz is sent from the AC power source 3 to the amplifier 4, and the current is amplified by the amplifier 4, so that the maximum value of the AC magnetic field generated by the coil is 70 A / m and 130 A / m. Current was passed.
Under the above conditions, the amorphous metal ribbon 1 is subjected to magnetostrictive vibration, and while maintaining this state, the cutting blade 6 is subjected to a load of 10 kgf (approx. Pressed against the surface of band 1.
For comparison, machining was performed in the same manner as in Embodiment 1 except that no magnetostrictive vibration was performed.

It was confirmed how much magnetostriction occurred in the amorphous metal ribbon under the above conditions.
7 and 8 are BH curves showing the soft magnetism of the amorphous ribbon used, and FIG. 8 is a partially enlarged view of the horizontal axis of FIG. As shown in FIG. 7, in this amorphous metal ribbon, the magnetic flux density at 800 A / m is B = 1.5 T close to the saturation magnetic flux density. Further, as shown in FIG. 8, it can be seen that the magnetic flux density at 130 A / m is B = 1.1 T, and this magnetic flux density is about 73.3% of the saturation magnetic flux density. Since the amorphous metal ribbon has a saturation magnetostriction of 27 ppm, when an alternating magnetic field of 130 A / m is applied to the amorphous metal ribbon, the magnetostriction of 19.8 ppm calculated as 27 ppm × 73.3% is obtained. Will cause magnetostrictive vibration.
Similarly, when a case where an AC magnetic field of 70 A / m is applied to the amorphous metal ribbon is calculated, the magnetostriction is vibrated with 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 pass rate Out of machining the amorphous metal strip on the outer peripheral side, and the machine of the amorphous metal strip on the inner peripheral side. The processing pass rate In is shown.
In addition, the pass rate of machining is as shown in FIG. 5 when a crack or crack is not generated from the cut trace 12, and as shown in FIG. 6, a crack 10 or crack 11 is generated from the cut trace 12. What was done was rejected. The number of machining experiments was 10 times.

An amorphous metal ribbon is machined without magnetostrictive vibration. In the measurement result of 8, the pass rate on the outer peripheral side was only 10%, and the pass rate on the inner peripheral side was only 50%.
In contrast, No. 1 was obtained by machining an amorphous metal ribbon while causing magnetostrictive vibration. In the embodiment of 1-7, the pass rate on the outer peripheral side was all 60% or higher, and the pass rate on the inner peripheral side was all 80% or higher, and the pass rate was improved in all embodiments than the pass rate of the comparative example. .
In particular, No. 1 with a magnetostrictive vibration frequency of 10 to 60 kHz. In the embodiment of 1-4, the pass rate on the outer peripheral side was improved to 80% or more. Furthermore, No. having a frequency of 10 to 40 kHz. In the embodiment of 1-3, the pass rates on the outer peripheral side were all improved to 90% or more. Furthermore, No. having a frequency of 20 to 40 kHz. In a few embodiments, the pass rate on the inner circumference side was both improved to 100%.

Table 1 also shows the presence or absence of heat generation at 40 ° C. or higher due to induction heating. It can be seen that the embodiment having no heat generation of 40 ° C. or higher tends to have a higher acceptance rate. The reason for this is considered that when there is no heat generation, the magnetization follows the magnetic field, and the vibration of the magnetic field is efficiently converted into mechanical vibration. On the other hand, when the frequency of the alternating magnetic field is increased, it is considered that a large delay, that is, loss occurs in the magnetization response to the magnetic field, and the loss is released as heat. The fact that a loss has occurred is presumed that the energy of the applied magnetic field is not efficiently converted into the energy of magnetostrictive vibration.

FIG. It is a photograph of the processed surface in 2 amorphous metal ribbons. The magnification is 500 times. FIG. 10 is an enlarged photograph of FIG. The magnification is 3000 times. In the figure, the upper side of the ribbon is the outer peripheral side when wound on the bobbin. In the figure, a shear plane having oblique machining traces at the center of the ribbon in the thickness direction can be confirmed.
FIG. 11 is a schematic diagram of FIG. In the figure, B is a shear plane. B2 is a shear plane where a linear processing mark can be observed in the moving direction of the cutting blade, and B1 is a shear plane where it cannot be observed. A is a sagging surface, C is a fractured surface, and D is a burr surface.
The amorphous metal ribbon of the present embodiment is an amorphous metal ribbon having a sheared surface by machining on the processed surface of the ribbon, and in the processed surface, the outline on the sagging surface side of the surface of the ribbon is Has a wave shape.
The corrugated contour is formed with a period of 5.2 μm on average.
Furthermore, the sheared surface accounts for 70.4% of the processed surface.
Further, the amorphous metal ribbon of this embodiment has a corrugated shape in which the outline on the sag surface side of the shear plane correlates with the outline on the sag surface side of the surface of the ribbon at a total width of 45 μm in the photograph of FIG. Have

FIG. It is a photograph of the processed surface in the amorphous metal ribbon of 8 comparative examples. The magnification is 500 times. FIG. 13 is an enlarged photograph of FIG. The magnification is 3000 times. In the figure, the upper side of the ribbon is the outer peripheral side when wound on the bobbin. In the figure, a shear plane having oblique machining traces at the center of the ribbon in the thickness direction can be confirmed.
FIG. 14 is a schematic diagram of FIG. In the figure, B is a shear plane. A is a sagging surface, C is a fractured surface, and D is a burr surface.
Unlike the present embodiment, this comparative amorphous metal ribbon has a flat outline on the sag surface side of the ribbon surface, and was not corrugated. Moreover, the outline on the sag surface side in the shear plane was not a shape correlated with the outline on the sag surface side of the ribbon surface.
Further, the ratio occupied by the shear plane is 27.2%, which is very small.

(Example 2)
In Example 2, the strength of the alternating magnetic field to be applied was changed, and the pass rate of machining by the change was examined.
The amorphous metal ribbon was machined by the apparatus shown in FIG. The frequency of magnetostrictive vibration was 30 kHz. Further, an alternating current was passed through the coil so that the maximum value of the alternating magnetic field generated by the coil was 30 A / m, 70 A / m, 100 A / m, and 130 A / m. In this case, the amorphous metal ribbon vibrates with magnetostriction of 12 ppm, 16 ppm, 18 ppm, and 19.8 ppm.
Other than that, the pass rate was examined under the same conditions as in the first embodiment.
In the range of the intensity of the alternating magnetic field, No. 1 was obtained by machining an amorphous metal ribbon while magnetostrictively vibrating the ribbon. In the embodiment of 1-4, the pass rates on the outer peripheral side are all 60% or higher, and the pass rates on the inner peripheral side are all 70% or higher. The pass rate improved in all the embodiments compared to the pass rate of 8 comparative examples.
In the range of the intensity of the alternating magnetic field, the passing rate of machining tends to increase as the magnetic field strength increases.

(Example 3)
The amorphous metal ribbon was machined by the apparatus shown in FIG.
The bobbin 5 used was the same as in the first embodiment. The slit amorphous metal ribbon 1 was wound four times around the bobbin in the circumferential direction.
An AC current of 30 kHz is sent from the AC power source 3 to the amplifier 4, the current is amplified by the amplifier 4, and the AC current is applied to the coil 2 so that the maximum value of the AC magnetic field generated by the coil (14 turns) is 180 A / m. Washed away. In this case, the amorphous metal ribbon vibrates magnetostrictively with a magnetostriction of 24 ppm.
Other than that, the pass rate of machining was examined under the same conditions as in the first embodiment.
As a result, all four layers could be cut without any cracks or cracks.
As a comparison, the pass rate of machining was examined in a state where no alternating current was passed through the coil 2 and no magnetostrictive vibration was caused. However, the cutting blade 6 entered the amorphous metal ribbon was worse than in the above embodiment. All four layers cracked or cracked extensively. The acceptance rate when an alternating magnetic field was generated was 90%, and the acceptance rate when no magnetic field was present was 0%.

In Example 1-3, the FeSiB-based amorphous metal ribbon having soft magnetism was used. However, the amorphous metal ribbon that can be nanocrystallized is also used before nanocrystallization. If so, the same degree of saturation magnetostriction can be obtained, and the same effect can be expected by applying the present invention.

In Example 1-3, machining is performed in which a slit is formed in an amorphous metal ribbon. For example, a long ribbon is cut or punched to form a plurality of processed ribbons of the same shape. It can also be made into a belt and laminated.

Example 4
In Example 4, a method for processing an amorphous metal ribbon according to the above-described embodiment (a portion where vibration was locally applied to the amorphous metal ribbon by a processing tool and repeated fatigue due to the vibration was applied) A machined amorphous metal ribbon was obtained by a machining method).
By roll cooling, an amorphous metal ribbon having an alloy composition of Fe _81.5 Si ₄ B _14.5 in atomic percent was produced. An amorphous metal ribbon having a thickness of 22.7 μm was prepared. The thickness of the ribbon was calculated from density, weight, and dimensions (length × width). The width of the ribbon was 80 mm.
As the punching device, the one shown in FIG. 3 was used.
As the punching dies, carbide materials (Fuji Roy VF-12 material manufactured by Fuji Dice) were used for the punchers 8a and 8b and the punch frames 9a and 9b. The punch has a columnar shape with a rectangular tip, the dimensions are 5 × 15 mm, and the corners are rounded (R portion 0.3 mm). The die has a processing hole into which a punch is inserted. Further, the punchers 8a and 8b and the punch frames 9a and 9b sandwich the amorphous metal ribbon 1, respectively, and the punchers 8a and 8b vibrate in the thickness direction. The vibrations of the punchers 8a and 8b were ultrasonic vibrations by an ultrasonic generator. The punchers 8a and 8b and the punch frames 9a and 9 are slidable in the thickness direction of the amorphous metal ribbon.
One amorphous metal ribbon was sandwiched between the punch frames 9a and 9b and the punchers 8a and 8b. In this state, the punchers 8a and 8b were ultrasonically vibrated, and the amorphous metal ribbon was repeatedly fatigued by vibration at the sliding portion between the punch frame and the puncher. Thereafter, the punchers 8a and 8b were operated under the condition of a weight of 1400 N while the punchers 8a and 8b were ultrasonically vibrated, and punching was performed. An amorphous metal ribbon in which the side portion of the ribbon was machined was obtained by a machining method in which the amorphous metal ribbon was machined while being vibrated.

FIG. 15 is a photograph of the processed surface (side surface portion) of the amorphous metal ribbon obtained in Example 4. The magnification is 500 times. FIG. 16 is a schematic diagram of FIG. In the figure, a shear plane having oblique machining traces at the center of the ribbon in the thickness direction can be confirmed.
In this amorphous metal ribbon, the fracture surface occupied an area of 73.4% on the processed surface (side surface portion) of the machined ribbon.

For comparison, a machined amorphous metal ribbon was obtained in the same manner as in Example 4 except that the punchers 8a and 8b were not vibrated.
FIG. 17 is a photograph of the processed surface (side surface portion) of the obtained amorphous metal ribbon. FIG. 18 is a schematic diagram of FIG. As is generally said, a cross section by punching has a sag surface A (shaded portion), a shear surface B (vertical line portion), a fractured surface C (white portion), and a burr D (gray portion). .
However, this comparative amorphous metal ribbon is different from that of the present embodiment, and has a flat outline on the sag surface side of the ribbon surface and is not corrugated. Further, the ratio of the fracture surface to the processed surface is less than 70% (46.2%), which is very small. In the processed surface, the ratio of the shear surface was 48.0%.

In Example 4, the FeSiB-based amorphous metal ribbon having soft magnetism was used. However, the present invention is also applied to the amorphous metal ribbon capable of nanocrystallization. Similar effects can be expected.
In the above embodiment, the amorphous metal ribbon is subjected to repeated fatigue by vibration, and then punching is performed by stopping the ultrasonic vibration of the punchers 8a and 8b. That is, after the amorphous metal ribbon is vibrated. Machining and machining methods can also be applied.

1: amorphous metal ribbon, 2: coil, 3: AC power supply, 4: amplifier, 5: bobbin, 6: processing tool, 7: unwinding roll, 8: puncher, 9: punch frame, 10: crack, 11: crack, 12: cut trace, A: sag surface, B: shear surface, C: fracture surface, D: burr surface

Claims (16)

1. A method of processing an amorphous metal ribbon,
   A method for processing an amorphous metal ribbon, wherein the amorphous metal ribbon is machined after being vibrated or vibrated.
2. The amorphous metal ribbon according to claim 1, wherein the amorphous metal ribbon has a saturation magnetostriction of 1 ppm or more, and the vibration is a vibration due to magnetostriction of the amorphous metal ribbon. Processing method.
3. The method for processing an amorphous metal ribbon according to claim 1 or 2, wherein the vibration has a frequency of 1 Hz to 500 kHz.
4. The method for processing an amorphous metal ribbon according to claim 2 or 3, wherein the vibration is generated by applying an AC magnetic field of 1 A / m or more to the amorphous metal ribbon.
5. The method for processing an amorphous metal ribbon according to claim 1, wherein a portion of the amorphous metal ribbon that is locally vibrated by a processing tool is machined.
6. The processing tool includes a puncher and a punch frame that can sandwich the upper and lower surfaces of the amorphous metal ribbon,
   At least one of the puncher and the punch frame is slidable in the thickness direction of the amorphous metal ribbon,
   The puncher and punch frame sandwich the upper and lower surfaces of the amorphous metal ribbon, and at least one of them vibrates in the thickness direction, so that the puncher and punch frame of the amorphous metal ribbon are 6. The amorphous metal according to claim 5, wherein the amorphous metal ribbon is vibrated at a portion located at a sliding portion of the metal, and a portion subjected to repeated fatigue by the vibration is punched by the puncher. Processing method of ribbon.
7. The amorphous metal ribbon is a long strip,
   The method for processing an amorphous metal ribbon according to any one of claims 1 to 6, wherein the amorphous metal ribbon is machined while being conveyed in the longitudinal direction.
8. The method for processing an amorphous metal ribbon according to any one of claims 1 to 7, wherein the amorphous metal ribbon is mainly composed of Fe produced by roll cooling.
9. The method for processing an amorphous metal ribbon according to claim 1, wherein the amorphous metal ribbon has a thickness of 5 μm or more and 70 μm or less.
10. The method for processing an amorphous metal ribbon according to any one of claims 1 to 9, wherein the amorphous metal ribbon has a Vickers hardness HV of 500 or more.
11. A method for producing a laminated body, in which the amorphous metal ribbons processed by the amorphous metal ribbon processing method according to claim 1 are laminated.
12. An amorphous metal ribbon having a sheared surface obtained by machining on the processed surface of the ribbon, wherein the outline of the sag surface side of the ribbon surface has a corrugated shape on the processed surface.
13. The amorphous metal ribbon according to claim 12, wherein the corrugated outline has irregularities with an average period of 0.1 to 20 µm.
14. The amorphous metal ribbon according to claim 12 or 13, wherein the shear surface occupies an area of 40% or more in the processed surface.
15. The amorphous metal ribbon according to any one of claims 12 to 14, wherein a contour of the sag surface side of the shear surface correlates with a profile of the sag surface side of the ribbon surface.
16. An amorphous metal ribbon having a machined shear surface on the processing surface of the ribbon,
    An amorphous metal ribbon in which a fracture surface occupies an area of 50% or more on the machined surface of the machined ribbon.
    
    

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