JP7707709B2 - Die parts for processing amorphous alloy plate materials, and a manufacturing method for punched amorphous alloy materials. - Google Patents

Description

The present invention relates to die components for processing amorphous alloy plate materials, and a method for processing amorphous alloy plate materials.

Rotating electric machines used as motors for electric vehicles and hybrid electric vehicles are required to operate with high efficiency by reducing losses caused by the high frequency of alternating magnetic flux resulting from high speed rotation in order to ensure output. To date, the efficiency of rotating electric machines has been improved by using inverters, applying rare earth magnets, optimizing structural design, etc., but to achieve even higher efficiency, it is necessary to reduce the iron loss of the laminated iron core used in the magnetic poles. Therefore, there is an increasing demand for the use of low-loss magnetic materials such as amorphous alloys and nanocrystalline soft magnetic alloys containing fine bcc structure Fe crystalline phases and FeSi crystalline phases and amorphous phases, instead of the silicon steel sheets conventionally used in laminated iron cores.

As an amorphous alloy, for example, Fe-Si-B based soft magnetic alloys are known, and are produced as thin ribbons by ultra-quenching a molten metal adjusted to a specified composition using a method such as single roll liquid quenching to make it amorphous. Metglas (registered trademark) 2605HB1M and 2605SA1 from METGLAS, Inc. and Fe-Si-B-Cr based 2605SA3 are commercially available.

Nanocrystalline soft magnetic alloys are obtained by heat treating amorphous ribbons obtained in the same manner as amorphous alloys, to precipitate (nanocrystallize) Fe and FeSi crystalline phases. For example, FINEMET (registered trademark) FT-3M from Hitachi Metals, Ltd., which is based on Fe-Si-B-Cu-Nb, VITROPERM (registered trademark) 800 from VACUUMSCHMELZE GmbH & Co. KG, and NANOPERM (registered trademark) from MAGNETEC Gesellschaft fur Magnettechnologie mbH, which is based on Fe-B-Zr-Cu, are well known.

All of these are supplied as long ribbons, usually with a thickness of 10 to several tens of μm, and are also called strips, ribbons, films, or foils. In the following explanation, in addition to these single-layer ribbons, multilayers made by stacking multiple ribbons, composites including adhesive layers, and multilayers made by stacking other materials such as electromagnetic steel sheets will all be referred to as amorphous alloy sheet materials.

Amorphous alloys are ideal elastic-plastic materials that generally do not undergo strain hardening, and have the properties of large plastic deformability and toughness. However, they are known to be less likely to elongate under uniaxial stress conditions such as tensile tests. Sheets of amorphous alloys that have these properties are very hard, and have the disadvantage of being less workable than crystalline silicon steel sheets, which is a factor in the lack of progress in their application to laminated cores, where the sheet material needs to be processed into a specified shape.

In light of this, various processing technologies have been investigated for obtaining thin plates or iron cores of a specified shape from amorphous alloy sheet material. One of these is punching using a press machine that uses die parts consisting of a punch and a die. However, with conventional die parts, the cutting edges used in processing are prone to wear and chipping, and there are issues with the need for frequent maintenance of the cutting edges and replacement of die parts, resulting in low productivity and preventing progress in mass production.

The wear on the cutting edges of die parts is thought to be mainly caused by fatigue failure due to repeated impacts and shearing work, and wear due to rubbing against the sheared plate material, and as a countermeasure, a hard coating such as DLC (Diamond Like Carbon), AlCrN, CrN, or TiN is formed on the cutting edge. Patent Document 1 shows a die part for punching that has a hard coating containing Al, Cr, and N on its surface.

JP 2018-164936 A

However, the die parts of Patent Document 1 are suitable for punching electromagnetic soft iron, and there is room for improvement in terms of wear on the cutting edge when punching amorphous alloy plate material, and similar improvements are required for the die parts having the other hard coatings mentioned above.
Therefore, an object of the present invention is to provide a die component with a longer life by improving wear on the cutting edge in shearing or breaking processing of amorphous alloy plate material, or to provide a processing method for amorphous alloy plate material with a longer life by improving wear on the cutting edge of the die component.

The present invention is a die component used for shearing or breaking an amorphous alloy sheet material, comprising a punch member and a die member having a hole into which the punch member is inserted, wherein both the punch member and the die member include a base material made of a metal and a hard metal compound, and a hard coating formed on the surface of the base material in an area used for the processing, and the hard coating comprises a first hard layer mainly composed of Ti, Si, and N , and a second hard layer mainly composed of Ti, Al, and N between the first hard layer and the base material .
In the present invention, it is preferable that the hard coating is multi-layered, has the first hard layer as a surface layer , and has hard layers containing Ti, Si, and N as main components and hard layers containing Ti, Al, and N as main components alternately between the surface layer and the base material .
In the present invention , the metal compound preferably contains, as a main component, tungsten carbide having an average particle size of 5 μm or less.
In the present invention , it is preferable that the hard coating is formed on a portion of the punch member which is inserted into the die member.
In the present invention , it is preferable that the side surface of the punch member has a portion where a hard coating is formed and a portion where no hard coating is formed, and that the hard coating is formed at least on the portion that is inserted into the die member.
In the present invention , it is also preferable that, in both the punch member and the die member, the surfaces perpendicular to the sliding direction of the punch are polished surfaces, and that a hard coating is disposed only on the side surfaces of the punch member and the surfaces of the holes in the die member into which the punch member is inserted.
The present invention also provides a method for producing an amorphous alloy punched material by shearing or fracturing an amorphous alloy plate using die parts, the die parts comprising a punch member and a die member having a hole into which the punch member is inserted, and both of the punch member and the die member include a base material made of a metal and a hard metal compound, and a hard coating formed on an area of the surface of the base material to be used for the processing, the hard coating comprising a first hard layer mainly composed of Ti, Si, and N, and a second hard layer mainly composed of Ti, Al, and N between the first hard layer and the base material.

According to the present invention, it is possible to provide die parts with improved wear of the cutting edge and extended life in shearing or breaking of amorphous alloy plate material. In addition, the die parts with extended life can be used to manufacture punched amorphous alloy materials .

FIG. 2 is a schematic diagram of a die part (punch) according to one embodiment of the present invention. FIG. 2 is a schematic diagram of a mold part (die) according to one embodiment of the present invention. FIG. 2 is a schematic diagram of a cross section of a mold part according to one embodiment of the present invention. 1 is a schematic diagram showing a cross-sectional structure of an amorphous alloy plate material. FIG. 2 is a schematic diagram for explaining punching according to one embodiment of the present invention. 1 is a schematic diagram of a punched material punched out from an amorphous alloy plate by a die part. FIG. FIG. 2 is a partial cross-sectional view of a punched material punched by a die part according to one embodiment of the present invention. 1 is an image of a punched material observed by a laser microscope. FIG. 13 is a diagram showing a comparison of changes in deformation height of a punched material versus the number of punches.

The following describes in detail an embodiment of the present invention, but the present invention is not limited thereto. In addition, in some or all of the figures, parts that are not necessary for the explanation are omitted, and some parts are illustrated enlarged or reduced in size to facilitate the explanation. In this specification, a numerical range expressed using "~" means a range that includes the numerical values written before and after "~" as the lower and upper limits.

1 and 2 show schematic diagrams of a die part according to an embodiment of the present invention. The die part 1 shown in FIG. 1 has a hard coating 21 having a first hard layer containing Ti, Si, and N on the surface of a rectangular prism-shaped base material 20. The hard coating 21 is formed on the entire bottom surface and the side surfaces, which are not shown in the drawing, and in the illustrated example, the hard coating 21 is formed only on the lower side of the base material 20, but it is sufficient that it is formed at least in the area used for processing. The die part 2 shown in FIG. 2 can be used as a pair of dies when the die part 1 is used as, for example, a punch for punching. The base material 20 has a rectangular hole (through hole) through which the die part 1 (punch) can be inserted, and has a hard coating 21 having a first hard layer containing Ti, Si, and N on at least the upper surface of the through hole.

In the die part 1 (punch member) shown in FIG. 1, a hard coating 21 is formed on the lower side of the side, and no hard coating 21 is formed on the upper side. The portion on the lower side where the hard coating 21 is formed includes the portion that is inserted into the hole of the die part 2 (die member) shown in FIG. 2. In this way, by forming the hard coating 21 only on a portion of the punch member, it is possible to reduce the labor and raw materials required to form the hard coating 21, which is efficient. This is also true for the die part 2 (die member).

It is desirable to provide the hard coating 21 having a first hard layer containing Ti, Si, and N on both die parts 1 and 2, but it is sufficient that at least one of the die parts has the hard coating 21, and the other die part may have the conventional hard coating described above. In addition, die parts include those formed by combining separate parts.

Figure 3 shows a schematic diagram of a cross section of a die part according to one embodiment of the present invention. A hard coating 21 is provided on the base material 20 in a two-layer configuration, and the outermost surface of the hard coating 21 is provided with a first hard layer 22 containing Ti, Si, and N.

The first hard layer according to the present invention contains at least Ti, Si, and N, and serves as a hard coating with excellent wear resistance and durability to protect the base material 20, prevent wear, and improve the lifespan. When the first hard layer 22 is formed by a deposition method using a Ti-Si target in a chamber into which nitrogen is introduced, the harder the layer is, the higher the Si content is. For this reason, when x is expressed as Ti _x Si _1-x , which is the atomic ratio when only the metal element is taken into consideration, it is preferable that x<0.90. The structure of the first hard layer is preferably nanocrystalline with an average grain size of 25 nm or less.
In addition, a second hard layer 23 is provided between the base material 20 and the first hard layer 22. This second hard layer 23 contains at least Ti, Al, and N. The second hard layer 23 improves adhesion and plays the role of a base for improving peel strength. For this reason, it is preferable to provide the second hard layer 23, but it is not necessary. When the second hard layer 23 is expressed as Ti _y Al _1-y , which is an atomic ratio when y is only considered as a metal element, it is preferable that 0.25<y<0.75, and more preferably 0.30<y<0.50.

The hard coating 21 may further include multiple hard layers, so long as it has a first hard layer containing Ti, Si, and N on the surface. For example, a hard layer mainly composed of Ti, Si, and N and a hard layer mainly composed of Ti, Al, and N may be alternately formed to form a multi-layered hard coating having three or more layers, and a hard layer containing other components may also be provided. The present invention also includes the case where a coating is formed to temporarily protect the first hard layer 22.

The first hard layer 22 and the second hard layer 23 can be formed by a known film formation method. For example, they can be formed by using a liquid phase method such as electroplating or electroless plating, a physical vapor deposition method such as vacuum deposition, molecular beam epitaxy, sputtering, or ion plating, or a chemical vapor deposition method such as thermal CVD, photo CVD, or plasma CVD. In addition, the base material 20 may be subjected to a nitriding treatment or carburizing treatment before forming the hard coating 21. The film formation method may be selected depending on the composition and thickness of the amorphous alloy plate material, whether it is a single layer, multiple layers, or the presence or absence of an adhesive layer, etc.

When the hard coating 21 is a single layer of the first hard layer 22, the thickness is preferably in the range of 0.1 to 60 μm, taking into consideration the wear allowance and peel strength. The thickness of the hard coating 21 is more preferably 0.2 to 20 μm, and even more preferably 0.5 to 10 μm. However, the optimal thickness can be selected depending on the composition and thickness of the amorphous alloy plate material, and is not limited to this range.
When the hard coating 21 is multi-layered, the thickness of the first hard layer 22 on the surface is preferably in the range of 0.1 to 30 μm. The thickness of the second hard layer 23 is preferably in the range of 0.1 to 30 μm. The thickness of the first hard layer 22 is more preferably 0.2 to 10 μm, and even more preferably 0.5 to 5 μm. The thickness of the second hard layer 23 is more preferably 0.2 to 10 μm, and even more preferably 0.5 to 5 μm.

The base material 20 is composed of a material consisting of a metal and a hard metal compound. For example, the base material 20 may be classified as HW, HF, or HT in the material classification described in JIS B4053 2013. When using a material classified as HW or HF, it is preferable to use a material consisting of a hard phase mainly composed of tungsten carbide and a bonding phase mainly composed of an iron group metal such as Co. A solid solution consisting of at least one selected from transition metal elements of groups 4a, 5a, and 6a of the periodic table and at least one selected from carbon, nitrogen, oxygen, and boron may be included. When using a material classified as HT, it is possible to use a material consisting of a solid solution phase consisting of at least one selected from transition metal elements of groups 4a, 5a, and 6a of the periodic table and at least one selected from carbon, nitrogen, oxygen, and boron, a bonding phase consisting of one or more iron-based metals, and unavoidable impurities. In addition, by using tungsten carbide having an average particle size of 5 μm or less as the main component of the metal compound, the strength of the base material 20 can be improved and the wear resistance can be further improved. Furthermore, it is more preferable that the average particle size of the metal compound is 2 μm or less. Furthermore, in order to suppress chipping due to a decrease in the toughness of the base material 20, the average particle size of the metal compound is preferably 0.5 μm or more, and more preferably 0.7 μm or more.

Figure 4 shows an example of an amorphous alloy plate material to be subjected to shear processing or fracture processing by the die part according to the present invention. The amorphous alloy plate material 11 includes at least one layer of an amorphous alloy thin plate 12. The amorphous alloy thin plate 12 can be, for example, an Fe-based amorphous alloy, a Co-based amorphous alloy, or a Ni-based amorphous alloy. This also includes amorphous alloys as precursors of nanocrystalline soft magnetic alloys.

The amorphous alloy thin plate 12 that is widely used usually has a thickness of several tens of μm per layer, and when the amorphous alloy plate material 11 is composed of one layer of the amorphous alloy thin plate 12, it is difficult to handle for shearing or breaking. In addition, there are disadvantages such as low production efficiency per stroke (number of hits) in punching and difficulty in adjusting the minute clearance between the die and the punch when processing by combining multiple die parts. For this reason, the amorphous alloy plate material 11 may be a laminate of multiple amorphous alloy thin plates 12. The multiple amorphous alloy thin plates 12 may be a combination of amorphous alloys with different compositions and thicknesses. In addition, it may be a laminate of thin plates 13 of different materials. For the thin plates 13 of different materials, for example, soft magnetic materials such as electromagnetic steel plate, electromagnetic soft iron, permalloy, and permendur can be used, but the optimal material can be selected according to the production process and is not limited to these examples.

The amorphous alloy plate material 11 may have an adhesive layer 14 between each layer of the multiple amorphous alloy thin plates 12 or between the thin plates 13 of different materials. The material of the adhesive layer 14 may be, for example, engineering plastics such as PPS (polyphenylene sulfide), PC (polycarbonate), and PET (polyethylene terephthalate) if it is thermoplastic, or epoxy resin or unsaturated polyester if it is thermosetting resin, but is not limited to these examples. In addition, the adhesive layer 14 may be uncured when processed by the mold parts.

5 shows an example in which the die part 1 is used as a punch and the die part 2 is used as a punch die to punch out an amorphous alloy plate material 11. For example, in the case of punching, shearing and breaking generally occur on the processed cross section. Although the form of shearing and breaking varies depending on the clearance between the punch and the die, the blade tip shape, and the configuration of the amorphous alloy plate material 11, the present invention can be applied not only to punching but also to general processing in which at least one of shearing and breaking occurs.
In the present invention, the amorphous alloy plate material 11 is preferably a single amorphous alloy ribbon or a laminate of 2 to 6 amorphous alloy thin plates 12 .
In the present invention, the amorphous alloy plate material 11 preferably has a thickness of 10 μm to 200 μm, and more preferably has a thickness of 14 μm to 150 μm.
In the present invention, the thickness of the amorphous alloy thin plate 12 constituting the amorphous alloy plate material 11 is preferably 10 to 50 μm, and more preferably 14 to 40 μm.
In the present invention, the clearance between the punch and the die is preferably set to 2% to 10% of the thickness of the amorphous alloy sheet material.

Metglas (registered trademark) 2605HB1M was prepared as the amorphous alloy sheet material. The amorphous alloy sheet material was a long, single-layered ribbon with a thickness of 25 μm and a width of 30 mm. This amorphous alloy sheet material was sheared and broken using a punching die (die part 1 and die part 2 in Figure 5) to produce a punched material (punched amorphous alloy sheet material) with the shape shown in Figure 6. The dimensions of the punched material were a rectangle of 15 mm x 5 mm, and the corner R (chamfering with a curvature radius R) was 0.3 mm.

The base material of the punching die parts of the present invention is mainly made of tungsten carbide, the punch is made of ultrafine-grained cemented carbide with an average grain size of 0.7 μm, and the die is made of a mixed type of coarse-grained cemented carbide with average grain sizes of 0.5 μm and 5.0 μm. The punch is a rectangular parallelepiped with dimensions of 5 mm x 15 mm x 44 mm, and the die is a rectangular parallelepiped with dimensions of 75 mm x 40 mm x 8 mm with a rectangular hole of 5 mm x 15 mm. Parts of the punching die of the present invention other than the die parts (punch and die) are mainly made of high-speed tool steel, etc.

The hard layer of the hard coating was formed in a chamber with nitrogen introduced using BALIQ (registered trademark) TISINOS from OC Oerlikon Balzers AG as a TiSi target. HiPIMS (High Power Impulse Magnetron Sputtering), a type of sputtering, was used to form the hard layer of the hard coating. This method generates high-density plasma by applying a high-output pulse voltage to the target, resulting in a uniform, smooth film with excellent adhesion.

First, a TiAlN film was formed on the base material of each of the punch and die as an intermediate layer (corresponding to the second hard layer), and then a TiSiN film (corresponding to the first hard layer) was formed on the outermost surface. The film was formed at the end portion having a circumference of 5 mm x 15 mm, which is a punched shape, and was an area extending about 1 cm from the punch cutting edge 24 and the die cutting edge 25. It was applied to both the perpendicular and parallel surfaces to the punch sliding direction (corresponding to the up and down direction in FIG. 5). After the film was formed, the surfaces perpendicular to the sliding direction of both the punch and die were polished, and the hard film was left only on the surfaces parallel to the punch sliding direction (the side of the punch, the surface of the hole in the die). The punch and die can be used without polishing the surfaces perpendicular to the sliding direction, but by polishing the surfaces perpendicular to the sliding direction, the cutting edge can be made sharp. During punching, the sliding length after contact with the amorphous alloy plate is 105 μm from the cutting edge, and the amorphous alloy plate does not come into contact with the portion where the hard coating is not formed on the surface parallel to the punch sliding direction.
In addition, repeated punching using the punch and die causes wear of the hard film. The hard film of the present invention has higher durability than conventional hard films, but wear also occurs in the hard film of the present invention when the number of repeated punching operations is increased. When the degree of wear of the hard film becomes large, the effect of the hard film cannot be exhibited. When the degree of wear of the hard film becomes large, the cutting edge of the punch or die can be reshaped into a sharp shape by grinding the cutting edge of the punch or die (grinding the surface perpendicular to the sliding direction of the punch or die). This allows the punch or die to be used repeatedly. The width of the film-formed portion may be determined taking into account the number of times of this grinding operation. The width of the film-formed portion is preferably three times or more the sliding length. Furthermore, it is preferable that the width is 10 times or more the sliding length.

The hard coating formed on the punch and die had a total thickness of about 2 μm from the base material to the outermost surface, with the second hard layer of TiAlN and the first hard layer of TiSiN each being about 1 μm thick. The thickness of the hard coating was measured using a photograph obtained by an optical microscope. In addition, each part was assembled so that the clearance between the punch and the die with the hard coating was 10% of the thickness of the plate material, i.e., 2.5 μm.
The composition of the second hard layer was _{Ti0.20Al0.25N0.55} in _atomic ratio, _and the composition of the first hard layer _{was Ti0.34Si0.12N0.54} in atomic ratio. These compositions were determined by composition analysis using wavelength _dispersive X-ray spectrometry, excluding inevitable impurities.

The press machine used in this embodiment is MPS405UD manufactured by Electric Discharge Precision Machining Laboratory Co., Ltd. In addition to the thickness of the amorphous alloy plate material of 25 μm, the bottom dead center was set at a position 80 μm lower than the position where the height of the punch tip and the top end of the die are aligned, taking into consideration the elongation until the breakage. In other words, the bottom dead center is the point where the punch surface slides 105 μm after contacting the amorphous alloy plate material. The punching speed was set to 31 mm/s. The punching speed was calculated by reading the value of the linear scale mounted on the 4-axis servo press with a sequencer with a sampling rate of 0.2 ms and calculating the speed at the position where the punch and the amorphous alloy plate material come into contact. In consideration of productivity, the punching speed is preferably 10 mm/s or more, more preferably 30 mm/s or more. In addition, the punching speed is preferably 800 mm/s or less, more preferably 600 mm/s or less, in order to avoid sudden heat generation of various parts due to friction.

To evaluate the shape of the punched material, first, images of 14 points on the end of the punched material were taken using a Keyence VK-X1000 laser microscope. Fixed-point observations were performed on points 110 to 123 shown in Figure 6, and an area of 270 μm x 202 μm was taken for each point. The lens magnification was 50x. Observation was performed perpendicular to the surface of the punched material that was in contact with the punch. In other words, when an image was taken from the negative direction toward the positive direction of the z axis shown in Figure 7, a deformation height of 40 was detected in the negative direction of the z axis.

Figure 8 shows an example of an observation image. At least 50% of the imaging range is punched material 11, and the position is adjusted so that the deformation height 40 can be imaged. The inclination is obtained within the correction range 130 so that the flat part excluding the end of the punched material becomes the reference plane, and the entire image is subjected to primary plane correction. For the corrected image, five profile lines 131 that perpendicularly intersect with the end of the punched material are drawn at intervals of about 60 μm, and the deformation height 40 is obtained from each profile line. In other words, five pieces of deformation height 40 data are obtained for one imaging point. This measurement is performed for 14 imaging points, and 5 x 14 = 70 profiles are obtained. In other words, 70 pieces of deformation height 40 data are obtained for a punched material with a specific number of punches. The average, maximum, and minimum values of the 70 pieces of deformation height 40 data are obtained. The above evaluation was performed for punched materials with a punching number of 100,000 punches.

The cross section of the punched material usually shows sagging 44, sheared surfaces 43, fractured surfaces 42, and burrs 41, as shown in the schematic diagram of Figure 7. In the case of proper punching, a cross section including two types of modes, sheared surfaces 43 and fractured surfaces 42, can usually be observed. As wear of the die progresses, the sheared surfaces decrease, the proportion of fractured surfaces increases, and the height of sagging 44 and burrs 41 increases.

In Comparative Example 1, a die with a hard coating of AlCrSiN was prepared and an amorphous alloy plate was punched. In Comparative Example 1, the film was formed by the arc ion plating method. The conditions such as the base material, plate material, and punching speed were not changed from those in the Examples.

The differences in the configuration between Example 1 and Comparative Example 1 are shown in Table 1. Figure 9 shows a graph with the number of punches on the horizontal axis and the deformation height of the punched material on the vertical axis. The average values are plotted, and the range between the maximum and minimum values is displayed as error bars.

In Comparative Example 1, a maximum deformation of approximately 23 μm occurred after only 20,000 punches. In Example 1, the base material of the die was protected by the hard coating containing TiSiN, which was the first hard layer, and the deformation height 40 did not exceed 20 μm within the practical range. This confirmed that the hard coating of Example 1 is advantageous for machining amorphous alloys and can improve the lifespan.

1. Die parts (punches)
2. Die parts
Reference Signs List 11: Amorphous alloy plate 12: Amorphous alloy thin plate 13: Thin plate of different material 14: Adhesive layer 20: Base material 21: Hard film 22: First hard layer 23: Second hard layer 24: Punch cutting edge 25: Die cutting edge 40: Deformation height 41: Burr 42: Fracture surface 43: Shear surface 44: Sagging 110 to 123: Imaged location 130: Correction range 131: Profile line

Claims (7)

A die component used for shearing or breaking an amorphous alloy plate material, comprising a punch member and a die member having a hole into which the punch member is inserted ,
Both the punch member and the die member include a base material made of a metal and a hard metal compound, and a hard coating formed on the surface of the base material in an area used for the processing,
The hard coating comprises a first hard layer having Ti, Si, and N as its main components , and a second hard layer having Ti, Al, and N as its main components between the first hard layer and the base material . The hard coating is multi-layered,
2. A die part for processing amorphous alloy plate material according to claim 1, characterized in that it has the first hard layer on the surface layer, and between the surface layer and the base material, hard layers mainly composed of Ti, Si, and N and hard layers mainly composed of Ti, Al, and N are alternately provided. A die part for processing amorphous alloy plate material according to claim 1 or 2, characterized in that the metal compound is mainly composed of tungsten carbide having an average particle size of 5 μm or less. 4. A die part for processing an amorphous alloy plate material according to claim 1, wherein the hard coating is formed on a portion of the punch member which is inserted into the die member. The die part for processing amorphous alloy sheets, as described in claim 4, characterized in that the side of the punch member has a portion on which a hard coating is formed and a portion on which no hard coating is formed, and at least the portion inserted into the die member has a hard coating formed thereon. 6. A die part for processing amorphous alloy sheets according to claim 4 or 5, characterized in that in both the punch member and the die member, the surfaces perpendicular to the sliding direction of the punch are polished surfaces, and a hard coating is disposed only on the side surface of the punch member and the surface of the hole in the die member into which the punch member is inserted. A method for producing a punched material of an amorphous alloy by shearing or breaking a plate material of an amorphous alloy using a die component, comprising the steps of:
The die part includes a punch member and a die member having a hole into which the punch member is inserted;
Both the punch member and the die member include a base material made of a metal and a hard metal compound, and a hard coating formed on the surface of the base material in an area used for the processing,
The hard coating comprises a first hard layer having Ti, Si, and N as its main components, and a second hard layer having Ti, Al, and N as its main components, which is disposed between the first hard layer and the base material.