JPH08243822A - Raw material used for cutting tool and manufacture thereof - Google Patents

Abstract

PURPOSE: To enable a cutting tool provided with a cemented carbide sintered body including cemented carbide material such as diamond to be used many times by applying re-polishing process thereto, and also to enable this cutting tool to be manufactured simply and furthermore to enable a cutting tool having cemented carbide sintered body in its many cutting edge parts to be obtained simply. CONSTITUTION: A cemented carbide sintered body layer 12 is formed between foundation materials 11, and further laminating body used for cutting tool in which each groove 13 of each cemented carbide sintered body 14 is provided along the direction normal to the laminating direction on the outside surface of the foundation material, is manufactured as required. By cutting this laminating body used for a cutting tool sequentially in a direction normal to the laminating direction, a plurality of raw material 10 used tar cutting tool in which cemented carbide sintered body layer is formed continuously in the axial direction between foundation materials and further a plurality of raw material used for cutting tool in which the grooves on the cemented carbide sintered body is continuously formed in axial direction on the outside surface of the foundation material, are manufactured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material for a cutting tool used for obtaining various cutting tools such as a drill, a reamer, an end mill, and a cutting tool, and a material for a cutting tool for producing such a material for a cutting tool. More particularly, the present invention relates to a cutting tool material provided with an ultra-hard sintered body containing an ultra-hard material such as diamond or cubic boron nitride, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, in various cutting tools such as a drill, a reamer, an end mill, and a cutting tool, those made of cemented carbide are generally widely used.

However, when a printed circuit board such as a reinforced plastic in which glass fibers are impregnated with an epoxy resin is cut by using a cutting tool made of such a cemented carbide, wear of the cutting tool is caused. There was a problem that the life was short and the life was shortened, the cutting tool had to be frequently replaced, the processing efficiency was deteriorated, and the cost was high.

For this reason, in recent years, as a cutting tool having extremely high hardness and excellent wear resistance, a cutting tool using an ultra-hard sintered body containing an ultra-hard material such as diamond or cubic boron nitride is used. Tools have come into use.

In the past, as a cutting tool using such an ultra-hard sintered body, in general, Japanese Patent Publication No. 2-1
No. 0843, Japanese Patent Publication No. 4-9754, and Japanese Patent Publication No. 6
The one disclosed in Japanese Patent Laid-Open No. 4-6882 was used.

Here, in the cutting tool disclosed in Japanese Patent Publication No. 2-10843 or Japanese Patent Publication No. 4-9754, as shown in FIG. 1A, it is made of cemented carbide or the like. After manufacturing a cutting tool laminate a in which an ultra-hard sintered body layer 2 containing an ultra-hard material such as diamond or cubic boron nitride is provided on a substrate 1, the cutting tool laminate a is laminated in the laminating direction. A cylindrical cutting tool material 3 in which a superhard sintered body layer 2 is provided on a base material 1 is manufactured as shown in FIG. In the cutting tool material 3 thus obtained, the portion of the super-hard sintered body layer 2 is subjected to blade processing to obtain a cutting tool.

However, as described above, it is very troublesome to carry out the edging process on the portion of the super-hard sintered body layer 2 which is composed of only the super-hard sintered body having extremely high hardness. Much of the super-hard sintered body is wasted, and in the case where the super-hard sintered body layer 2 is formed only at the tip portion in this way, the super-hard sintered body which is bladed by using this cutting tool is used. When the body part is worn, it cannot be re-polished and used many times, and the life of the cutting tool itself is short, the use efficiency is poor, and the cost is high.

In the cutting tool using the ultra-hard sintered body disclosed in Japanese Patent Publication No. 64-6882, a high-hardness sintered body containing an ultra-hard material such as high-density layer boron nitride or diamond is used. A tip adhered between a plurality of base materials such as cemented carbide was used, and the tip was brazed to the cutting edge of the cutting tool.

However, even in this cutting tool, since the tip using the ultra-hard sintered body such as diamond is only provided at the tip portion of the cutting tool, when the tip in this cutting tool is worn, Since it cannot be re-polished and used, and the tip is brazed and attached to the cutting tool, the attachment strength is not sufficient and there is a problem that the tip comes off the cutting tool.

[0010]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned various problems in a cutting tool provided with an ultra-hard sintered body containing an ultra-hard material such as diamond or cubic boron nitride. Is an issue.

That is, according to the present invention, even when a cutting tool provided with an ultra-hard sintered body containing an ultra-hard material such as diamond or cubic boron nitride as described above is worn by use, For cutting tools that can be re-polished many times and used, manufacturing of such cutting tools can be performed easily, and cutting tools with a super-hard sintered body at many cutting edges can be easily obtained. It is an object of the present invention to provide a material and a method for manufacturing a material for a cutting tool that can easily manufacture such a material for a cutting tool.

[0012]

In the first cutting tool material according to the present invention, in order to solve the above problems, an ultra-hard material such as diamond or cubic boron nitride is contained between the base materials 11. At least two super-hard sintered body layers 12 are formed, and each super-hard sintered body layer 12 is continuously provided in the axial direction.

Further, in the second cutting tool material of the present invention, a superhard sintered body layer 12 containing a superhard material such as diamond or cubic boron nitride is formed between the base materials 11. The hard sintered body layer 12 is continuously provided in the axial direction, and the groove 1 continuous in the axial direction is formed on the outer surface of the base material 11.
3 is formed, and the superhard sintered body 14 is provided in the groove 13.

Further, in the first method for producing a material for a cutting tool according to the present invention, the superhard sintered body layer 12 containing the superhard material such as diamond or cubic boron nitride is formed between the base materials 11. After manufacturing the cutting tool laminate A, the cutting tool laminate A is cut in a direction orthogonal to the stacking direction to obtain a cutting tool material 10 in which the superhard sintered body layer 12 is continuous in the axial direction. I decided to manufacture multiple products.

Further, in the second method for producing a material for a cutting tool according to the present invention, a superhard sintered body layer 12 containing a superhard material such as diamond or cubic boron nitride is formed between the base materials 11. In addition, the groove 1 provided on the outer surface of the base material 11 along the direction orthogonal to the stacking direction.
After manufacturing a cutting tool laminate A in which an ultra-hard sintered body 14 containing an ultra-hard material such as diamond or cubic boron nitride is provided in 3, the cutting tool laminate A is formed into the groove 1 described above.
3 is cut along the direction of 3, and the superhard sintered body layer 12 is continuously provided between the base materials 11 in the axial direction, and the superhard sintered material is provided in the grooves 13 continuous in the axial direction on the outer surface of the base material 11. A plurality of cutting tool materials 10 provided with the united body 14 are manufactured.

Here, as a material forming the above-mentioned base material 11, WC which has been generally used for a cutting tool has been conventionally used.
—Co-based cemented carbide or cermet can be used.

On the other hand, the superhard material used for the superhard sintered body layer 12 and the superhard sintered body 14 contains one or both of the diamond particles and the cubic boron nitride particles as described above. From the viewpoint of obtaining a cutting tool having extremely high hardness and excellent wear resistance, the content of diamond particles or cubic boron nitride particles is preferably 50% or more.

Here, when diamond is used as the main component in the superhard material in the superhard sintered body layer 12 or the superhard sintered body 14, in addition to using diamond alone, iron, cobalt or nickel is used. It is preferable to add a binder such as, and when cubic boron nitride is used as a main component, this cubic boron nitride is used alone, and in addition to the elements of groups 4a, 5a and 6a of the periodic table. Carbides, nitrides and carbonitrides, and binders such as aluminum, silicon and cobalt are added.

When manufacturing the cutting tool laminate A in which the super-hard sintered body layer 12 is formed between the base materials 11 as described above, the base material previously sintered and formed into a plate shape. 1
In the meantime, the powder of the super-hard material as described above is sandwiched and sintered in this state to manufacture the cutting tool laminate A,
It is also possible to sequentially laminate the powder of the material forming the base material 11 and the powder of the above-mentioned ultra-hard material, and in this state, sinter them together to manufacture the cutting tool laminate A. . It should be noted that the laminate A for cutting tools obtained by sintering as described above
In the case of manufacturing a base material, if a binder such as cobalt is contained in the base material 11 or the super-hard material, the binder is used as the base material 1.
1 and the superhard sintered body layer 12 are transferred to each other to form the base material 11
And the superhard sintered body layer 12 are strongly bonded.

In order to manufacture the cutting tool material 10 by cutting the cutting tool laminate A manufactured as described above in a direction orthogonal to the laminating direction, depending on the intended use of the cutting tool material A. For example, when used for a cutting tool such as a drill or an end mill, the laminate A for a cutting tool is cut to obtain a columnar cutting tool material 10 so as to be cut into an appropriate shape. To do.

In the cutting tool material 10 thus obtained, the blade according to each application is so arranged that the super-hard sintered body layer 12 and the super-hard sintered body 14 are located at the edge of the blade. Perform cutting work to obtain various cutting tools.

[0022]

In the first cutting tool material according to the present invention, the superhard sintered body layer 12 containing the superhard material such as diamond and cubic boron nitride is at least continuously provided in the axial direction between the base materials 11. Since two layers are formed, a cutting tool having at least four cutting edge portions made of a super-hard sintered body can be obtained by subjecting this raw material for a cutting tool to edging, and each super-hard sintered body is obtained. Since the layer 12 is continuously formed in the axial direction, the cutting tool can be re-polished and used many times even if the cutting tool is worn by use.

Also in the second cutting tool material of the present invention, the superhard sintered body layer 12 containing the superhard material such as diamond or cubic boron nitride is continuously provided in the axial direction between the base materials 11. Is formed and the superhard sintered body 14 is formed in the groove 13 that is continuous in the axial direction on the outer surface of the base material 11. Therefore, by cutting the material for a cutting tool, at least three A cutting tool having a cutting edge portion made of a super-hard sintered body is obtained, and the super-hard sintered body layer 12 and the super-hard sintered body 14 in the groove 13 are continuously formed in the axial direction. Even if the cutting tool is worn due to use, it becomes possible to re-polish and use the cutting tool many times.

Further, in the first method for manufacturing a material for a cutting tool according to the present invention, the superhard sintered body layer 12 containing the superhard material such as diamond or cubic boron nitride is formed between the base materials 11. Since the laminated body A for a cutting tool is manufactured and the laminated body A for a cutting tool is cut in the direction orthogonal to the laminating direction, the material 10 for a cutting tool in which the super-hard sintered body layer 12 is continuous in the axial direction. You can easily manufacture multiple products.

Further, in the second method for producing a material for a cutting tool according to the present invention, the superhard sintered body layer 12 containing the superhard material such as diamond or cubic boron nitride is formed between the base materials 11. In addition, the groove 1 provided on the outer surface of the base material 11 along the direction orthogonal to the stacking direction.
3. A cutting tool laminate A in which a superhard sintered body 14 containing an ultrahard material such as diamond or cubic boron nitride is provided in 3 is manufactured, and the cutting tool laminate A is formed in the direction of the groove 13. Since the super hard sintered body layer 12 is continuously provided between the base materials 11 in the axial direction, the super hard sintered body 12 is cut in the grooves 13 continuous in the axial direction on the outer surface of the base material 11. It becomes possible to easily manufacture a plurality of cutting tool materials 10 provided with the united body 14.

[0026]

Embodiments of the present invention will be specifically described below.

(Embodiment 1) In this embodiment, FIG.
As shown in FIG. 2, a cutting tool in which a superhard sintered body layer 12 containing a superhard material such as diamond or cubic boron nitride is provided between a pair of plate-shaped base materials 11 made of cemented carbide. The laminated body A1 was manufactured.

Here, for example, a cemented carbide made of WC-8% Co is used as the material forming the base material 11, while a superhard material constituting the superhard sintered body layer 12 is
For example, 50% diamond powder and the balance TiC-
The one made of 30% Co was used.

In order to manufacture the cutting tool laminate A1 in which the superhard sintered body layer 12 is provided between the pair of plate-shaped base materials 11 as described above, the plate is pre-sintered to obtain a plate. The powder of the super-hard material was sandwiched between the pair of base materials 11 formed into a shape, and the super-hard material was sintered in this state. However, the method for manufacturing the cutting tool laminate A1 is not particularly limited to such a method, and, for example, a cemented carbide powder forming the base material 11 and a superhard material powder are sequentially laminated. It is also possible to produce a three-layer structure by sintering the above powders in this state to produce the cutting tool laminate A1.

Next, the cutting tool laminate A1 manufactured as described above is sequentially cut in a direction orthogonal to the stacking direction by a method such as discharge wire cutting to form a columnar cutting tool material. A plurality of 10 are manufactured.

Here, as shown in FIG. 3, the columnar cutting tool material 10 produced in this manner has a superhard sintered body between the base materials 11 at the center of the circular end face. The layer 12 was formed, and the superhard sintered body layer 12 had a structure continuous in the axial direction.

Then, with respect to the cutting tool material 10,
Appropriate edging processing was performed so that the above-mentioned super-hard sintered body layer 12 was positioned at the edge of the blade to obtain a cutting tool such as a drill, an end mill or a cutting tool.

Here, as described above, the cutting tool material 10 is used.
When carrying out a blade processing on the super hard sintered body layer 12
Since the portion of the base material 11 that sandwiches is made of a cemented carbide, the edging process can be performed more easily than when the edging process is performed on a product made of only a cemented carbide.

In the cutting tool thus manufactured, the superhard sintered body layer 12 used for the cutting edge is formed continuously along the axial direction. Even if the portion of the formed super-hard sintered body layer 12 was worn, it could be re-polished many times and used.

(Embodiment 2) In this embodiment, FIG.
As shown in FIG. 2, two superhard sintered body layers 12 containing superhard materials such as diamond and cubic boron nitride are provided between three plate-shaped base materials 11 made of cemented carbide. The provided cutting tool laminate A2 was manufactured.

Here, as the material forming the base material 11 and the superhard sintered body layer 12 in the cutting tool laminate A2,
The same material as in the case of the above-mentioned Example 1 was used, and in the case of manufacturing this cutting tool laminate A2, similarly to the case of the above-mentioned Example 1, it was previously sintered and formed into a plate shape. A powder of an ultra-hard material was sandwiched between the three base materials 11, and the ultra-hard material was sintered in this state. However, also in this case, the powder of the cemented carbide and the powder of the cemented carbide forming the base material 11 are sequentially laminated to form a five-layer structure, and the above-mentioned powders are sintered in this state, It is also possible to manufacture the cutting tool laminate A2.

Next, the cutting tool laminate A2 obtained as described above is sequentially cut in a direction orthogonal to the laminating direction by a method such as discharge wire cutting in the same manner as in Example 1 above. A plurality of cylindrical cutting tool materials 10 are manufactured.

Here, as shown in FIG. 5, the columnar cutting tool material 10 manufactured in this manner has a superhard sintered body layer between three base materials 11 at its circular end face. Two layers 12 were formed, and each super-hard sintered body layer 12 had a structure continuous in the axial direction.

Then, with respect to the material 10 for cutting tools, as in the case of the first embodiment, each super-hard sintered body layer 12 is formed.
The blade was appropriately processed so that it was located at the edge of the blade to obtain a cutting tool such as a reamer or end mill.

In this case, each super-hard sintered body layer 1
Since the portions of the base material 11 sandwiching 2 are made of cemented carbide, as in the case of the above-described first embodiment, the edging process can be easily performed, and more than in the case of the first embodiment. A cutting tool whose cutting edge portion is made of a super-hard sintered body can be obtained, and since each super-hard sintered body layer 12 used for the cutting edge is continuously formed along the axial direction, Even if the portion of the superhard sintered body layer 12 that had been bladed by the use of this cutting tool was worn, it could be repolished many times and used.

In this embodiment, the base material 11 and the super-hard sintered body layer 12 are laminated in this order, and the super-hard sintered material is formed between the three plate-shaped base materials 11. Although two body layers 12 are provided, more base materials 11 and super-hard sintered body layers 12 are laminated to provide three or more super-hard sintered body layers 12, and more layers are provided. To obtain a cutting tool whose cutting edge is made of a super-hard sintered body,
It is also possible to configure the upper and lower layers of the cutting tool material 10 with the super-hard sintered body layer 12.

(Embodiment 3) In this embodiment, FIG.
As shown in FIG. 3, a superhard sintered body layer 12 containing a superhard material such as diamond or cubic boron nitride is formed between a pair of plate-shaped base materials 11 made of cemented carbide. At the same time, a superhard sintered body 14 containing a superhard material such as diamond or cubic boron nitride in a groove 13 formed on the surface of each plate-shaped substrate 11 along a direction orthogonal to the stacking direction. The laminated body A3 for a cutting tool provided with was manufactured.

Here, for the base material 11 and the superhard sintered body layer 12 in this cutting tool laminate A3, the same materials as in Example 1 were used.

Further, the above cutting tool laminate A3
In manufacturing, a powder containing an ultra-hard material such as diamond is sandwiched between a pair of base materials 11 that are pre-sintered into a plate shape, and a plurality of powders are provided on the surface of each base material 11. The groove 13 was formed, and the powder of the super-hard material was filled in the groove 13 and sintered in this state to obtain the cutting tool laminate A3. However, the method for producing the cutting tool laminate A3 is not particularly limited to such a method, and the cutting tool laminate A1 according to the first embodiment is used.
After manufacturing, a plurality of grooves 13 are formed on the surface of each substrate 11 in the cutting tool laminate A1, and the grooves 13 are filled with the above-mentioned powder of the superhard material. It is also possible to sinter to obtain the cutting tool laminate A3.

In this embodiment, the cutting tool laminate A3 obtained as described above is processed by the method of discharge wire cutting or the like in the same manner as in the case of the above-mentioned Embodiment 1 so that the groove 13 is orthogonal to the laminating direction. A plurality of cutting tool materials 10 having a columnar shape are manufactured by sequentially cutting in the direction of.

Here, as described above, the laminate A for cutting tools is used.
When cutting 3, the superhard sintered body 1 provided in the grooves 13 on the surfaces of the upper and lower base materials 11 as shown in FIG.
4 is included in each of the cutting tool materials 10 and cut into a cylindrical shape, and as shown in FIG. 7, a superhard sintered body layer is provided between the base materials 11 at the center of the circular end surface. Material 12 for a cutting tool in which 12 are formed continuously in the axial direction, and a super-hard sintered body 14 is provided in each of a pair of grooves 13 formed continuously in the axial direction on the outer peripheral surface.
It was made to manufacture multiple.

Then, the cutting tool material 10 of this embodiment is used.
Also, for the above-mentioned super-hard sintered body layer 12 and the above-mentioned super-hard sintered body 14 provided in the groove 13, proper blade cutting is carried out so that the super-hard sintered body 14 is positioned at the cutting edge portion, and a drill, an end mill,
I got a cutting tool such as a cutting tool.

In this case, too, a cutting tool having a large number of cutting edges made of a superhard sintered body is obtained, and the base material 11 portion sandwiching the superhard sintered body layer 12 is made of a superhard alloy. Therefore, the cutting process can be easily performed, and the super-hard sintered body layer 12 and the super-hard sintered body 1 used for the cutting edge are further provided.
Since 4 is continuously formed along the axial direction, the superhard sintered body layer 12 bladed by using this cutting tool
Even if the portion of the super-hard sintered body 14 in the groove 13 was worn, it could be re-polished many times and used.

In the cutting tool material 10 of this embodiment, since the superhard sintered body 14 is provided in the groove 13 formed in the base material 11, the superhard sintered body 14 is used as the base material. It was strongly bonded to No. 11 and the super-hard sintered body 14 did not come off from the base material 11 during cutting or the like.

In the cutting tool material 10 of this embodiment, as described above, the superhard sintered body layer 12 is continuously formed in the axial direction between the pair of base materials 11, and the outer peripheral surface of the superhard sintered body layer 12 is formed. Although the super-hard sintered body 14 is simply provided in the pair of grooves 13 continuous in the axial direction, the number of the super-hard sintered body layers 12 formed between the base materials 11 and the outer peripheral surface thereof are provided. The number of grooves 13 of the superhard sintered body 14 is not particularly limited to that shown in this embodiment.

Here, in the case of Example 4 shown in FIGS. 8 and 9, when manufacturing the cutting tool laminate A4, as shown in FIG. A super-hard sintered body provided in the groove 13 by providing the body layer 12 and changing the interval of the grooves 13 formed on the surface of each base material 11 so as to be provided in the groove 13 more than the cutting tool laminate A3 of the third embodiment. 1
The interval of 4 was narrowed. And this laminated body A for cutting tools
As shown in FIG. 9, a super-hard sintered body 14 was provided in order to manufacture a cylindrical tool material 10 by sequentially cutting 4 in the direction of the groove 13 orthogonal to the stacking direction. Four grooves 13 were formed on the outer peripheral surface of each cutting tool material 10. When the cutting tool material 10 of Example 4 was used, a cutting tool having a larger number of cutting edge portions than that of Example 3 made of a super-hard sintered body could be obtained.

Further, in the case of Example 5 shown in FIGS. 10 and 11, when manufacturing the cutting tool laminate A5, as shown in FIG. The two super hard sintered body layers 12 are provided between the three base materials 11 thus formed, and the stacking direction is formed on the surfaces of the base material 11 above and below, as in the case of the above-described third embodiment. A plurality of grooves 13 provided with the super-hard sintered body 14 were formed along a direction orthogonal to the above. Then, the cutting tool laminate A5 is sequentially cut into a cylindrical shape along the direction of the groove 13 orthogonal to the laminating direction, and as shown in FIG. 11, three base materials are formed on the circular end face. Two layers of super-hard sintered body 12 are formed between 11 continuously in the axial direction, and the super-hard sintered body is respectively provided in a pair of grooves 13 formed continuously in the axial direction on the outer peripheral surface thereof. The cutting tool material 10 provided with 14 was obtained. Even when the cutting tool material 10 of Example 5 was used, it was possible to obtain a cutting tool in which a larger number of cutting edge portions were made of a super-hard sintered body than in the case of Example 3 described above.

[0053]

As described in detail above, in each cutting tool material of the present invention, at least two superhard sintered body layers are formed continuously in the axial direction between the base materials, or Forms an ultra-hard sintered body layer between the base materials continuously in the axial direction and forms the super-hard sintered body in the groove continuous in the axial direction on the outer surface of the base material. By cutting the material for cutting, it becomes possible to obtain a cutting tool in which many cutting edges are made of super-hard sintered body, and the cutting process is made of only super-hard sintered body. This is easier than in the case of partial cutting, and in each of the above cutting tool materials, the grooves of the super-hard sintered body layer and the super-hard sintered body are formed continuously in the axial direction. If the cutting edge made of super-hard sintered body is worn by using a tool, Even if this is the case, this cutting tool can be re-polished and used many times, and since the super-hard sintered body layer is formed integrally with the base material, the super-hard sintered body with the cutting edge is formed. It has become possible to obtain a cutting tool that can perform stable cutting for a long period of time without the body layer part coming off.

Further, in the method for producing a material for a cutting tool according to the present invention, a laminate for a cutting tool in which a superhard sintered body layer is formed between base materials, and an outer surface of the base material are orthogonal to the stacking direction. To produce a laminate for a cutting tool provided with a groove of an ultra-hard sintered body along the direction, and to cut such a laminate for a cutting tool in a direction orthogonal to the laminating direction, Since the material for manufacturing is manufactured, it has become possible to easily manufacture a plurality of materials for cutting tools in which the grooves of the super-hard sintered body layer and the grooves of the super-hard sintered body are continuous in the axial direction.

[Brief description of drawings]

FIG. 1 is a perspective view of a conventional cutting tool laminate and a cutting tool material used to obtain a cutting tool using an ultra-hard sintered body.

FIG. 2 is a perspective view showing a state of manufacturing a cutting tool material by cutting the cutting tool laminate in Example 1 of the present invention.

FIG. 3 is a perspective view of a material for a cutting tool according to a first embodiment.

FIG. 4 is a perspective view showing a state of manufacturing a cutting tool material by cutting the cutting tool laminate in Example 2 of the present invention.

FIG. 5 is a perspective view of a cutting tool material according to a second embodiment.

FIG. 6 is a perspective view showing a state in which a cutting tool laminate is cut to manufacture a cutting tool material in Example 3 of the present invention.

FIG. 7 is a perspective view of a cutting tool material according to a third embodiment.

FIG. 8 is a perspective view showing a state of manufacturing a cutting tool material by cutting the cutting tool laminate in Example 4 of the present invention.

FIG. 9 is a perspective view of a cutting tool material according to a fourth embodiment.

FIG. 10 is a perspective view showing a state of manufacturing a cutting tool material by cutting the cutting tool laminate in Example 5 of the invention.

FIG. 11 is a perspective view of a cutting tool material according to a fifth embodiment.

[Explanation of symbols]

 A, A1, A2, A3, A4, A5 Cutting tool laminated body 10 Cutting tool material 11 Base material 12 Super-hard sintered body layer 13 Groove 14 Super-hard sintered body

Claims (4)

[Claims] 1. At least two super-hard sintered body layers 12 containing a super-hard material such as diamond or cubic boron nitride are formed between base materials 11, and each super-hard sintered body layer 12 is axially oriented. A material for cutting tools, which is characterized by being provided continuously. 2. A superhard sintered body layer 12 containing a superhard material such as diamond or cubic boron nitride is formed between base materials 11, and the superhard sintered body layer 12 is continuously formed in the axial direction. The groove 13 is provided on the outer surface of the base material 11 and is continuous in the axial direction, and an ultra-hard sintered body 14 containing an ultra-hard material such as diamond or cubic boron nitride is provided in the groove 13. A material for cutting tools characterized by being used. 3. A cutting tool laminate A in which a superhard sintered body layer 12 containing a superhard material such as diamond or cubic boron nitride is formed between base materials 11 and then used for this cutting tool. The cutting tool material 1 in which the laminated body A is cut in a direction orthogonal to the laminating direction and the superhard sintered body layer 12 is continuous in the axial direction.
A method for manufacturing a material for a cutting tool, which comprises manufacturing a plurality of 0s. 4. An ultra-hard sintered body layer 12 containing an ultra-hard material such as diamond or cubic boron nitride is formed between the base materials 11, and the outer surface of the base material 11 is orthogonal to the stacking direction. After manufacturing a cutting tool laminate A in which a superhard sintered body 14 containing a superhard material such as diamond or cubic boron nitride is provided in a groove 13 provided along the direction, The laminated body A is cut along the direction of the groove 13 which is orthogonal to the laminating direction, the superhard sintered body layer 12 is continuously provided between the base materials 11 in the axial direction, and the axis is formed on the outer surface of the base material 11. A method for manufacturing a material for a cutting tool, comprising: manufacturing a plurality of materials 10 for a cutting tool, each of which has a super-hard sintered body 14 provided in a groove 13 continuous in a direction.