JP2022185715A - Nanocrystal alloy piece manufacturing method and nanocrystal alloy piece manufacturing apparatus - Google Patents

Abstract

To provide a nanocrystal alloy piece manufacturing method that has high productivity, hardly causes die galling and hardly causes distortion, breakage and cracking.SOLUTION: A nanocrystal alloy piece manufacturing method comprises: a processing groove formation step in which a recessed part acting as a punching outline in a predetermined shape is formed on a surface of an amorphous alloy ribbon; a heat-treatment step in which the amorphous alloy ribbon is moved while contacting the ribbon with a heated convex surface and a portion contacting the convex surface of the amorphous alloy ribbon is moved while being pressed against the convex surface from the opposite side of the portion contacting thereto; and a punching-out step in which the ribbon is punched out, along the punching outline, into a nanocrystal alloy piece in the predetermined shape.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method for producing nanocrystalline alloy flakes, wherein an amorphous alloy ribbon is processed into nanocrystalline alloy flakes of a predetermined shape.

Amorphous alloys are known to exhibit excellent properties in terms of mechanical properties, magnetic properties, corrosion resistance, etc., even if they have the same composition as ordinary crystalline alloys. In particular, Fe-based and Co-based amorphous alloys are known to be soft magnetic materials with small coercive force because grain boundaries are not formed.
For amorphous alloys, it is necessary to rapidly cool and solidify the molten alloy so that crystal grains are not formed in the alloy. Produced by solidification. This manufacturing method is called a single roll method, and a ribbon-like amorphous alloy is obtained. As a magnetic core formed from a ribbon-like amorphous alloy, it is known that a toroidal core wound with an amorphous alloy can be easily produced.

Amorphous alloys are expected to be widely applied to stator cores and rotor cores of motors. Therefore, a method of punching an amorphous alloy ribbon into a predetermined shape to form amorphous alloy flakes and laminating the amorphous alloy flakes to form a core is applied (for example, Patent Document 1).

Some amorphous alloys can be heat-treated and nano-crystallized to improve the saturation magnetic flux density. However, since the nano-crystallized ribbon is brittle, it is difficult to punch it into a predetermined shape with an ordinary punching machine, and the only options are low-productivity processing methods such as laser processing and wire electric discharge machining.

There is also a method in which an amorphous alloy is formed into a predetermined shape by ordinary punching at the stage of the amorphous alloy before heat treatment, and then nano-crystallized by heat treatment. If heat treatment is performed without restraint, the plate thickness will be distorted, so if the plate is forcibly flattened during lamination, it will crack or the magnetic properties will deteriorate due to the stress generated in the nanocrystalline alloy.

As a method of suppressing distortion due to heat treatment, there is a method of heat-treating while sandwiching between two heating plates. In this case, since handling individual pieces punched into a predetermined shape one by one is inefficient, a method of heat-treating a partially connected ribbon state, cutting off the connected portions after heat treatment, and making individual pieces is performed. is proposed. (Patent Document 2)

Japanese Patent Application Laid-Open No. 2003-219613 JP 2020-120426 A

In the method described in Patent Literature 2, the nanocrystalline alloy embrittled by the heat treatment must be cut in order to separate into individual pieces of a predetermined shape after the heat treatment. Cracks and cracks occur during cutting, making it difficult to obtain a desired shape, and the cracks that occur at this time expand and extend due to vibrations, etc., when the nanocrystalline alloy is used as a product. Further, in the case of cutting by punching, cutting powder generated during cutting is caught in the gap between the molds, resulting in galling of the molds.

Accordingly, the present invention provides a method for producing nanocrystalline alloy flakes, which has high productivity, is less prone to mold galling, and is less prone to distortion, cracking, and chipping.

A method for producing a nanocrystalline alloy flake according to the present invention includes a process groove forming step of forming a concave portion to be a punching contour line of a predetermined shape on the surface of an amorphous alloy ribbon, and a convex surface obtained by heating the amorphous alloy ribbon. and move the portion of the amorphous alloy ribbon in contact with the convex surface while pressing it against the convex surface from the opposite side of the contact surface, and heat treat the amorphous alloy ribbon. and a punching step of punching the amorphous alloy ribbon along the punching outline.

Also, in the heat treatment step, it is preferable to press the contacting portion of the amorphous alloy ribbon via a flexible member.

Moreover, it is preferable that the heat treatment step heats the flexible member.

Moreover, it is preferable that the flexible member is a metal member.

A method for producing a nanocrystalline alloy flake according to the present invention includes a process groove forming step of forming recesses that serve as punching contour lines of a predetermined shape on the surface of an amorphous alloy ribbon, and heating the amorphous alloy ribbon. A heat treatment step of nano-crystallizing the amorphous alloy ribbon by heat treatment by moving while sandwiching between two heating members, a punching step of punching the amorphous alloy ribbon along the punching contour line,
characterized by having

Moreover, it is preferable that the recessed portion is formed by pressing with a stamping jig in the processed groove step.

Moreover, it is preferable to heat the marking jig.

The apparatus for manufacturing nanocrystalline alloy flakes of the present invention includes a stamping mechanism for forming recesses that serve as punching contour lines of a predetermined shape on the surface of an amorphous alloy ribbon, and a convex surface on which the amorphous alloy ribbon is heated. a heat treatment mechanism that moves while moving while pressing the portion of the amorphous alloy ribbon that contacts the convex surface from the opposite side of the contact surface against the convex surface; along with a punching mechanism for punching the nanocrystalline alloy piece of the predetermined shape.

Moreover, it is preferable that the heat treatment mechanism has a flexible member that presses the contacting portion of the amorphous alloy ribbon.

According to the present invention, it is possible to produce nanocrystalline alloy flakes with high productivity, which are less susceptible to mold galling, and which have little distortion, cracks, and chipping.

1 is a conceptual diagram of an apparatus for producing nanocrystalline alloy flakes according to the present embodiment. FIG. 4 is a flow chart showing a procedure for manufacturing a nanocrystalline metal piece from an amorphous alloy ribbon in this embodiment. FIG. 2 is a conceptual cross-sectional view of a stamping mechanism 22 that forms plastic working grooves in the amorphous alloy ribbon shown in FIG. 1; (a) shows the state at the start of marking, and (b) shows the state after completion of marking. FIG. 2 is a conceptual diagram of a heat treatment mechanism 24 for nanocrystalline alloying the amorphous alloy ribbon shown in FIG. (a) shows the stamped state of the amorphous alloy ribbon before heat treatment by the heat treatment mechanism shown in FIG. (b) shows the imprinted state of the nanocrystalline metal alloy ribbon after heat treatment by the heat treatment mechanism shown in FIG. FIG. 2 is a conceptual diagram of another form of the heat treatment mechanism 24 for nanocrystalline alloying the amorphous alloy ribbon shown in FIG. 1 ; FIG. 2 is a conceptual cross-sectional view showing one form of a punching mechanism 25 for separating nanocrystalline alloy pieces along the plastically worked grooves shown in FIG. 1 ; (a) shows the state at the start of punching, and (b) shows the state at the end of punching. FIG. 2 is a conceptual cross-sectional view showing one form of a punching mechanism 25 for separating nanocrystalline alloy pieces along the plastically worked grooves shown in FIG. 1 ; (a) shows the state at the start of punching, and (b) shows the state at the end of punching. FIG. 2 is a conceptual cross-sectional view showing one form of a punching mechanism 25 for separating nanocrystalline alloy pieces along the plastically worked grooves shown in FIG. 1 ; (a) shows the state at the start of punching, and (b) shows the state at the end of punching. FIG. 2 is a conceptual diagram showing one form of a punching mechanism 25 for separating nanocrystalline alloy pieces along the plastically worked grooves shown in FIG. 1; (a) is a side cross-sectional view of the device showing a state in the middle of punching. (b) is a cross-sectional view of the side of the device in the state of (a) as seen from the transport direction of the nanocrystalline alloy ribbon. The general appearance of a punched nanocrystalline alloy piece and an enlarged view of the cut part are shown. Figure 2 shows a general view of the nanocrystalline alloy ribbon on the punched side and an enlargement of the cut. 1 shows the appearance of a cut surface of a punched nanocrystalline alloy piece viewed from the front.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 schematically shows a nanocrystalline alloy flake manufacturing apparatus 20 for cutting out nanocrystalline alloy flakes having a predetermined shape from an amorphous alloy ribbon 1a. Here, the material of the amorphous alloy ribbon 1a is not particularly limited. For example, it can be applied to Fe-based nanocrystalline alloys such as Fe--Si--B--Nb--Cu system and Fe--Si--B--Nb--Cu--Ni system, which are nanocrystalline soft magnetic materials. The Fe-based nanocrystalline alloy has a composition that crystallizes nanocrystals by heat-treating the amorphous alloy ribbon.

The nanocrystalline alloy flake manufacturing apparatus 20 includes an unwinding mechanism 21, a stamping mechanism 22, a conveying mechanism 23, a heat treatment mechanism 24, a punching mechanism 25, and a winding mechanism 26, as shown in FIG.

The unwinding mechanism 21 can be equipped with the amorphous alloy ribbon 1a wound in a roll shape, and unwinds and conveys the amorphous alloy ribbon 1a by coordinated movement with the conveying mechanism 23 .

The stamping mechanism 22 has, for example, a stamping jig (hereinafter referred to as an anvil 221 and stamping punch 222) as shown in FIG. 3(a), and presses the stamping punch 222 against the surface of the amorphous alloy ribbon 1a. A recess (hereinafter referred to as plastic working groove 2) is formed along the contour line of the nanocrystalline alloy piece having a predetermined shape to be cut out. The stamping punch 222 for forming the plastic working grooves 2 does not need to be of a vertically movable type.

In the heat treatment mechanism 24, the amorphous alloy ribbon 1a is moved while being brought into contact with the heated convex surface, and the heat treatment causes microcrystallization in the amorphous alloy ribbon 1a to form the nanocrystalline alloy ribbon 1b. The heat treatment mechanism 24 has a portion with which the amorphous alloy ribbon 1a abuts, and a pressing portion that presses against the convex surface from the opposite side of the abutment surface. For example, as shown in FIG. 4, a band member, for example, two heating rolls 241a for pulling a metal belt 242 and a heating roll 241b against which the pulled metal belt 242 is pressed. 242, the amorphous alloy ribbon 1a can be arranged.

Here, the "contact surface" means that the amorphous alloy ribbon and the convex surface are in surface contact with each other. In addition, the term “convex surface” means a surface that rises toward the amorphous ribbon side, and like the heating rolls 241a and 241b shown in FIG. Any shape, such as a curved surface configured as a part of a member, may be used as long as the amorphous ribbon can follow and ensure sufficient contact.

Moreover, the band member should just be movable via a roll. In particular, as the band member, a member that bends flexibly (flexible member) is preferable, and a metal member is more preferable from the viewpoint of flexibility, strength and heat resistance. The metal belt 242 shown in FIG. 4 is an example of a band member.

The heating temperature of the heating rolls 241a and 241b is preferably 500° C. or higher so that the amorphous alloy ribbon 1a can be heated to the nanocrystallization temperature or higher when the amorphous alloy ribbon 1a is made of Fe-based nanocrystalline alloy or the like. Considering heat loss due to radiation from the metal belt 242, the surface temperature of the two heating rolls 241a is preferably higher than the surface temperature of the heating roll 241b. is more preferred.

The punching mechanism 25 includes, for example, a punch 251, a die 252, a lower presser 253, and an upper presser 254, as shown in FIG. The punching mechanism 25 punches the heat-treated nanocrystalline alloy ribbon 1b along the plastic working groove 2 on the surface of the nanocrystalline alloy ribbon 1b to cut out a nanocrystalline alloy piece 1c of a predetermined shape.

The punching mechanism 25 can also punch the nanocrystalline alloy piece 1c without using the lower presser 253, as shown in FIG. Moreover, as shown in FIG. 9, it is also possible to punch out the nanocrystalline alloy piece 1c using an elastic punch 255 having an elastic body at the tip. Alternatively, as shown in FIG. 10, an elastic rotating roll 256 having an elastic outer peripheral portion is pressed against a rotating die roll 257 having a concave surface matching the contour of the plastic working groove 2 to sandwich the nanocrystalline alloy ribbon 1b. Therefore, it is also possible to punch the nanocrystalline alloy piece 1c.

The winding mechanism 26 winds the nanocrystalline alloy ribbon 1b after the punching mechanism 25 cuts out the nanocrystalline alloy piece 1c of a predetermined shape into a roll.

Next, a method for manufacturing nanocrystalline alloy flakes in the nanocrystalline alloy flake manufacturing apparatus 20 of the present embodiment will be described with reference to the flowchart in FIG.

(preparation)
The amorphous alloy ribbon 1a wound into a roll is mounted on an unwinding mechanism 21. As shown in FIG. The amorphous alloy ribbon 1a to be used becomes a nanocrystalline alloy by heat treatment. etc.
The amorphous alloy ribbon 1a attached to the unwinding mechanism 21 is unwound and conveyed by coordinated movement with the conveying mechanism 23 .

(Processing groove forming process)
In the process groove forming step, recesses are formed on the surface of the amorphous alloy ribbon to form punching outlines of a predetermined shape. In this embodiment, the stamping mechanism 22 forms the plastically worked grooves 2 as recesses in the surface of the amorphous alloy ribbon 1a. Details of the process groove forming step will be described with reference to FIG. With the amorphous alloy ribbon 1a placed at the tip of the anvil 221, the tip of a stamping punch 222 having a punching contour line of a given shape is pressed against the surface of the amorphous alloy ribbon 1a with a given load. As a result, the plastic working groove 2 is formed to have a punching contour line of a predetermined shape.

Here, as shown in this embodiment, it is possible to form a machined groove by using the anvil 221 and the stamping punch 222 at room temperature, but the anvil 221 and the stamping punch 222 are heated to instantaneously form a groove during stamping. It is also useful to heat the amorphous alloy ribbon 1a to . Since the amorphous alloy ribbon 1a is softened by heating, the pressure required for stamping can be reduced, and the life of the anvil and the stamping punch can be extended.

The heating temperature of the anvil 221 and the stamping punch 222 is preferably in the range of the softening point of the amorphous alloy ribbon 1a, for example, 390° C. or higher and 430° C. or lower in the case of Fe-based nanocrystalline alloy. Here, the softening point is the temperature at which an amorphous solid substance having no definite melting point softens and begins to deform. Generally, the softening point varies depending on the composition.
The amorphous alloy ribbon 1 a having the plastic working grooves 2 formed thereon is sent to the heat treatment mechanism 24 .

Here, in the present embodiment, the plastically processed grooves 2 are formed by pressing using an anvil and a stamping punch, but recesses may be formed using, for example, a laser.

(Heat treatment process)
In the heat treatment step, the amorphous alloy ribbon is moved while being in contact with the heated convex surface, and the portion of the amorphous alloy ribbon that contacts the convex surface is moved from the opposite side of the contact surface to the convex surface. The amorphous alloy ribbon is nano-crystallized by heat treatment while being pressed against and moved. Microcrystallization occurs in the amorphous alloy ribbon 1a by the heat treatment, resulting in a nanocrystalline alloy ribbon 1b.

Here, if only heat is applied to the amorphous alloy ribbon 1a, deformation such as wrinkles will occur in the ribbon due to structural changes due to nanocrystallization, so that heat treatment is required while restraining the ribbon in some way. In this embodiment, a method of restraining the ribbon by sandwiching it between the heating roll 241b and the metal belt 242 from above and below will be described with reference to FIG.

In addition, in the process groove forming process, which is the previous process, the stamping is performed from one side of the amorphous alloy ribbon 1a. By sandwiching the ribbon between the heating roll 241b and the metal belt 242, deformation occurring around the plastic working groove 2 is pushed back, and the heat treatment can be performed while the entire ribbon is in uniform contact with the heating plate. Moreover, if the deformation around the plastically worked groove 2 is not suppressed, there is a possibility that a portion that does not come into contact with the hot plate will be generated. On the other hand, by sandwiching between the heating roll 241b and the metal belt 242 from above and below, it is possible to avoid the problem of uneven nanocrystallization.

As shown in FIG. 4, the amorphous alloy ribbon 1a moved to the heat treatment mechanism 24 is sandwiched between a metal belt 242 heated by a heating roll 241a and a heating roll 241b, and is heat-treated. A nanocrystalline alloy ribbon 1b is obtained.
At this time, the deformation of the amorphous alloy ribbon 1a around the plastic working groove 2 is corrected by the force of sandwiching by the metal belt 242 and the heating roll 241b and the softening due to heating, and the nanocrystalline alloy ribbon 1b after the heat treatment is corrected. In this state, portions other than the plastically worked groove 2 are flat.
After that, the amorphous alloy ribbon 1b after the heat treatment is sent to the punching mechanism 25. As shown in FIG.

Here, FIG. 5 shows a change in a ring-shaped plastic working groove with a diameter of 9.3 mm as an example of the change in deformation state before and after the heat treatment. FIG. 5(a) shows the state before heat treatment, and FIG. 5(b) shows the state after heat treatment. In FIG. 5(a), reflection and background distortion due to deformation can be seen. is canceled.

In this embodiment, a mechanism is used in which the amorphous alloy ribbon 1a is sandwiched between the heating roll 241b and the metal belt 242 from above and below. It is not limited to the exemplified form as long as it is possible to correct the deformation during plastic working in the process and to heat it uniformly. For example, a heat treatment form such as sandwiching between two heating members shown in FIG. 6 can be considered.

(Punching process)
After the heat treatment, the nanocrystalline alloy ribbon 1b is punched by the punching mechanism 25 along the plastic working groove 2 on the surface of the nanocrystalline alloy ribbon 1b to cut out the nanocrystalline alloy piece 1c of a predetermined shape.

Details of the punching process will be described with reference to FIG. 7, which is a schematic sectional view.
After the heat treatment process, the nanocrystalline alloy ribbon 1b is placed on the die 252 and the lower presser 253 so that the position of the plastic working groove 2 is in the gap between the die 252 and the lower presser 253, and then the die 252 and the upper presser 254. The position is fixed by being sandwiched between At this time, if the nanocrystalline alloy ribbon 1b remains deformed around the plastically worked groove 2 after stamping in the stamping step 22, it will be sandwiched and cracked. Since deformation is corrected and flattened, cracks do not occur when fixed.

When the punch 251 comes into contact with the lower presser 253 so as to face it and is further pushed in while receiving the reaction force of the lower presser 253, the part fixed by the die 252 and the upper presser 254 is fixed by the punch 251 and the lower presser 253. Shear stress and tensile stress are generated in the nanocrystalline alloy ribbon 1b between the portions. Stress concentrates on the groove bottom of the plastic working groove 2, and when the limit is reached, the nanocrystalline alloy ribbon 1b is cut at the plastic working groove 2, and a nanocrystalline alloy piece 1c of a predetermined shape is cut out.

Since the nanocrystalline alloy ribbon 1b has brittleness, the cut surface of the nanocrystalline alloy piece 1c having a predetermined shape is a cleaved surface, and has a feature that no burr is observed at the edge portion.
Since the nanocrystalline alloy pieces are thin, they are used by laminating a plurality of pieces. In this case, if the edge portion has burrs, the edge portion will be thicker than the other portions, resulting in a laminated component with swollen edge portions.

Here, when an integrated laminated part is made by using an adhesive between layers, it is possible to absorb burrs by increasing the thickness of the adhesive layer, but the volume ratio of the nanocrystalline alloy in the laminated part decreases. , the magnetic properties are degraded. In addition, there is a method in which the upper and lower surfaces of the laminated part are sandwiched between flat plates, and the burrs are forcibly deformed while being adhered and fixed, but the magnetic properties of the nanocrystalline alloy deteriorate when stress is applied. On the other hand, since the nanocrystalline alloy flakes produced in the present embodiment have no burrs, it becomes easier to obtain a desired laminate shape part while suppressing deterioration in magnetic properties.

In general, when punched by a punching mechanism, the nanocrystalline alloy ribbon is brittle, so chipping and cracking occur frequently. Chips and cracks do not fit within the clearance of the punch or die, and extend to the portion sandwiched between the punch and the lower presser or between the die and the upper presser, making it difficult to obtain nanocrystalline alloy flakes of a desired shape. In this case, narrowing the clearance between the punch and the die tends to bring the desired shape a little closer, but conversely, there is a high probability that the metal fragments generated during punching will get caught between the punch and the die and be bitten. Become.

Generally, the clearance between the punch and the die in punching is about 3% to 20% of the material plate thickness. For example, when the thickness of the nanocrystalline alloy ribbon is 30 μm, it is 0.9 to 6 μm. However, since the metal pieces generated during punching include various sizes, they are easily caught.

On the other hand, in the present embodiment, the nanocrystalline alloy ribbon 1a has the plastically worked grooves 2 and is cleaved along the plastically worked grooves 2 during punching. It is possible to obtain a nanocrystalline alloy piece 1c. Moreover, since the stress should be concentrated on the bottom of the plastic working groove, it is possible to secure a large clearance between the punch 251 and the die 252 . Originally, the generation of metal fragments is much less than when there is no plastic working groove 2, but if the clearance is large, metal fragments will not be caught between the punch 251 and the die 252, and the plastic working groove 2 will not be caught during punching. 2 is provided between the clearances, there is also a margin in the positioning accuracy required.

When punching the nanocrystalline alloy piece 1c by the punching mechanism 25, the mechanical properties of the nanocrystalline alloy ribbon 1b, the shape of the nanocrystalline alloy piece 1c, the shape of the plastic working groove 2, and the clearance between the punch 251 and the die 252 are considered. Conditions such as the size and the speed at which the punch descends during punching may be adjusted as appropriate. For example, when the thickness of the nanocrystalline alloy ribbon is 30 μm, punching is possible even with a clearance of 100 μm between the punch 251 and the die 252 if the groove depth of the plastic working groove 2 is 20 μm or more.

As shown in FIG. 10, an elastic rotating roll 256 having an elastic outer peripheral portion is pressed against a rotating die roll 257 having a concave surface matching the contour of the plastic working groove 2, and the nanocrystalline alloy ribbon 1b is sandwiched therebetween. , when punching the nanocrystalline alloy pieces 1c, continuous punching is possible because of the rotary method, and high productivity can be expected.

In the case of the rotation method illustrated in FIG. 10, after the bottom of the plastic working groove 2 first sandwiched between the elastic rotating roll 256 and the rotating die roll 257 is cleaved and broken, the nanocrystalline alloy ribbon 1b is conveyed, Cracks propagate to the bottoms of the remaining plastically worked grooves 2, and the punching of the nanocrystalline alloy piece 1c is completed. On the other hand, in punching methods other than those shown in FIG. 10, as the punch or elastic body is pushed in, pressure is applied to the entire bottom of the plastic working groove 2, and as soon as the weakest portion is cleaved and broken, another plastic working groove A crack propagates to the bottom of 2, and the punching of the nanocrystalline alloy piece 1c is completed.

An example (working example) in which an annular plastic working groove with a diameter of 9.3 mm was punched out by a punching mechanism on the cut surface of the nanocrystalline alloy piece 1c punched according to the present embodiment will be described.
The thickness of the nanocrystalline alloy ribbon used before punching was 30 μm, and the groove depth was measured at four points and distributed in the range of 16.2 to 22.2 μm, with an average of 19.1 μm. In this embodiment, the configuration shown in FIG. 7 is used, and the size of the clearance between the punch 251 and the die 252 is set to 100 μm.
Figures 11 and 12 show the overall appearance of the punched nanocrystalline alloy piece and the punched ribbon, and an enlarged view of the cut section, respectively. It can be seen that both the stamped nanocrystalline alloy piece and the stamped ribbon are cut along the plastic working groove.
FIG. 13 shows the appearance of the cut surface. It can be seen that the cut surface is cut by cleavage and there is no burr on the edge of the cut surface.
Therefore, according to the method for producing a nanocrystalline alloy flake according to the present embodiment, it is possible to suppress the occurrence of distortion, cracking, and chipping, and to make it difficult for mold galling to occur.

As described above, according to the present invention, nanocrystalline alloy flakes, which are difficult to produce due to their brittleness, can be produced with high productivity.

Although the present invention has been described above using the above embodiments, the technical scope of the present invention is not limited to the above embodiments.

1a: Amorphous alloy ribbon 1b: Nanocrystalline alloy ribbon 2: Plastic working groove 20: Nanocrystalline alloy piece manufacturing device 21: Unwinding mechanism 22: Stamping mechanism 23: Conveying mechanism 24, 24a, 24b: Heat treatment mechanism 25, 25a , 25b, 25c: punching mechanism 26: winding mechanism 221: anvil 222: marking punches 241a, 241b: heating rolls 242: metal belts 243a, 243b: heating member 251: punch 252: die 253: lower presser 254: upper presser 255 , 255a, 255b: elastic punches 256, 256a, 256b: elastic rotary roll 257: rotary die roll

Claims (9)

A processing groove forming step of forming recesses that serve as punching contour lines of a predetermined shape on the surface of the amorphous alloy ribbon;
The amorphous alloy ribbon is moved while being brought into contact with the heated convex surface, and the portion of the amorphous alloy ribbon that contacts the convex surface is pressed against the convex surface from the opposite side of the contact surface. a heat treatment step of nano-crystallizing the amorphous alloy ribbon by heat treatment while moving while attaching;
a punching step of punching the amorphous alloy ribbon along the punching contour;
A method for producing a nanocrystalline alloy flake, comprising: 2. The method for producing a nanocrystalline alloy flake according to claim 1, wherein in the heat treatment step, the contacting portion of the amorphous alloy ribbon is pressed via a flexible member. 3. The method of manufacturing a nanocrystalline alloy flake according to claim 2, wherein the heat treatment step heats the flexible member. 4. The method for producing a nanocrystalline alloy flake according to claim 2, wherein the flexible member is a metal member. A processing groove forming step of forming recesses that serve as punching contour lines of a predetermined shape on the surface of the amorphous alloy ribbon;
a heat treatment step of moving the amorphous alloy ribbon while sandwiching it between two heated heating members to nanocrystallize the amorphous alloy ribbon by heat treatment;
a punching step of punching the amorphous alloy ribbon along the punching contour;
A method for producing a nanocrystalline alloy flake, comprising: The method for producing a nanocrystalline alloy piece according to any one of claims 1 to 5, characterized in that, in the machining groove step, the recesses are formed by pressing with a stamping jig. 7. The method for producing a nanocrystalline alloy piece according to claim 6, wherein the stamping jig is heated. In the nanocrystalline alloy piece manufacturing equipment,
a stamping mechanism for forming recesses that serve as punching contour lines of a predetermined shape on the surface of the amorphous alloy ribbon;
The amorphous alloy ribbon is moved while being brought into contact with the heated convex surface, and the portion of the amorphous alloy ribbon that contacts the convex surface is pressed against the convex surface from the opposite side of the contact surface. a heat treatment mechanism that moves while attaching;
a punching mechanism for punching the nanocrystalline alloy piece of the predetermined shape along the punching contour;
An apparatus for producing nanocrystalline alloy flakes, characterized by comprising: 9. The apparatus for producing nanocrystalline alloy flakes according to claim 8, wherein the heat treatment mechanism has a flexible member that presses a contacting portion of the amorphous alloy ribbon.

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