WO2018181272A1

WO2018181272A1 - Coated tool and cutting tool

Info

Publication number: WO2018181272A1
Application number: PCT/JP2018/012348
Authority: WO
Inventors: 忠勝間; 芳和児玉
Original assignee: 京セラ株式会社
Priority date: 2017-03-29
Filing date: 2018-03-27
Publication date: 2018-10-04
Also published as: JPWO2018181272A1

Abstract

A coated tool according to one embodiment of the present invention is provided with: a substrate having a first phase including a plurality of tungsten carbide particles, and a second phase including cobalt and/or nickel; and a coating layer positioned on the substrate. The plurality of tungsten carbide particles include: a plurality of first particles which are in contact with the coating layer; and a plurality of second particles which are positioned away from the coating layer. At least one of the plurality of first particles has a recess provided to the surface facing the coating layer. The second phase is positioned in said recess.

Description

Coated tool and cutting tool

This aspect relates to a coated tool used in cutting.

As a coated tool used for cutting such as turning and turning, for example, a coated tool described in Patent Document 1 is known. The coated tool described in Patent Document 1 contains tungsten carbide (WC) as a hard phase component and titanium (Ti) or the like on the surface of a substrate containing 5 to 15% by mass of cobalt (Co) as a binder phase component. The coating layer to be contained is formed by vapor deposition.

In recent years, coated tools are required to have good bondability of the coating layer to the substrate and good durability of the substrate. In order to improve the bondability of the coating layer to the substrate, the toughness may be improved by increasing the amount of the binder phase by increasing the content of cobalt or cobalt in the substrate. However, when the content of the binder phase such as cobalt or nickel in the substrate is increased, the content of tungsten carbide is relatively decreased, so that plastic deformation is likely to occur and uneven wear is likely to proceed. Durability may be reduced.

JP 2014-184521 A

A coated tool according to an aspect includes a base having a first phase containing a plurality of tungsten carbide particles and a second phase containing at least one of cobalt and nickel, and a coating layer positioned on the base. ing. The plurality of tungsten carbide particles include a plurality of first particles in contact with the coating layer and a plurality of second particles located away from the coating layer. At least one of the plurality of first particles has a recess on the surface facing the coating layer, and the second phase is located in the recess.

It is a perspective view showing a covering tool of one embodiment. FIG. 2 is a cross-sectional view taken along the line AA of the coated tool shown in FIG. FIG. 3 is an enlarged view of the vicinity of a boundary between a substrate and a coating layer in the coating tool illustrated in FIG. 2. It is an enlarged view in area | region B1 shown in FIG. It is an enlarged view in area | region B2 shown in FIG. It is a top view which shows the cutting tool of one Embodiment. It is an enlarged view in area | region B3 shown in FIG.

Hereinafter, the coated tool 1 of one embodiment will be described in detail with reference to the drawings. However, each drawing referred to below shows only a main member necessary for explaining the present embodiment in a simplified manner for convenience of explanation. Therefore, the coating tool may include any component not shown in each of the referenced drawings. Moreover, the dimension of the member in each figure does not represent the dimension of an actual structural member, the dimension ratio of each member, etc. faithfully.

<Coated tool>
As shown in FIGS. 1 and 2, the coated tool 1 of this embodiment includes a base 3 and a coating layer 5. In the substrate 3 in the present embodiment, the first surface 7 (upper surface in FIG. 2), the second surface 9 (side surface in FIG. 2) adjacent to the first surface 7, and the first surface 7 and the second surface 9 intersect. And a cutting edge 11 located on at least a part of the ridgeline.

The base 3 in the present embodiment has a quadrangular plate shape as shown in FIG. 1, and the first surface 7 has a quadrangular shape. Therefore, the number of the second surfaces 9 is four. The shape of the substrate 3 is not limited to a square plate shape, and for example, the first surface 7 may be a triangle, a pentagon, a hexagon, or a circle. Moreover, the base | substrate 3 is not limited to plate shape, For example, column shape may be sufficient.

The cutting edge 11 is a part used when cutting a work material in order to manufacture a cut product. The cutting edge 11 may be located on the entire outer periphery of the first surface 7 of the base 3. The covering tool 1 is not limited to such a configuration. For example, the cutting blade 11 may be located only on one side of the quadrangular first surface 7 or on a part of the one side. As apparent from the fact that the coated tool 1 according to the present embodiment includes the coating layer 5 positioned on the base 3, the cutting blade 11 itself does not necessarily need to contact the work material in the cutting process. .

The first surface 7 in the present embodiment has a rake face region at least partially. The first region 13 along the cutting edge 11 on the first surface 7 is at least a rake surface region. Further, the second surface 9 in the present embodiment has a flank region at least partially. The second region 15 along the cutting edge 11 on the second surface 9 is at least a flank region. In other words, the cutting edge 11 is located at a portion where the rake face area and the flank face area intersect.

The base 3 in the present embodiment contains a first phase 17 containing tungsten carbide (WC) particles, as shown in FIGS. The base 3 has a second phase 19 containing at least one of cobalt (Co) and nickel (Ni). The first phase 17 is a part usually called a hard phase, and the second phase 19 is a part usually called a binder phase. The second phase 19 has a function of joining the particles constituting the first phase 17 together. Further, the second phase 19 has a function of bonding the particles constituting the first phase 17 and the coating layer 5. The second phase 19 in the present embodiment contains cobalt as a main component.

The first phase 17 may contain hard particles composed of other components such as titanium carbide (TiC) and tantalum carbide (TaC) in addition to the tungsten carbide particles. However, the first phase 17 in the present embodiment contains tungsten carbide as a main component even if it contains components such as titanium carbide and tantalum carbide.

In the present embodiment, “main component” means a component having the largest mass% value compared to other components. Therefore, for example, in the first phase 17, the value of mass% of tungsten carbide is the largest.

The covering layer 5 is located on the base 3 and covers the surface of the base 3. Note that the coating layer 5 does not need to cover the entire surface of the substrate 3, and a part of the surface of the substrate 3 may be exposed. In the present embodiment, at least the first surface 7 and the second surface 9 of the base 3 are covered with the coating layer 5. The coating layer 5 is provided to improve characteristics such as wear resistance and chipping resistance of the coated tool 1 in cutting.

The plurality of tungsten carbide particles contained in the first phase 17 of the substrate 3 in the present embodiment are separated from the plurality of first particles 17 a located on the surface of the substrate 3 and in contact with the coating layer 5, and the coating layer 5. It has the some 2nd particle | grains 17b located.

At this time, for example, as shown in FIG. 5, at least one of the plurality of first particles 17 a has a recess 23 on the surface 21 facing the coating layer 5, and the second phase 19 is positioned in the recess 23. Yes. Since the second phase 19, which is a binder phase, is located in the recess 23, the bondability of the coating layer 5 to the substrate 3 can be improved. In the cross-sectional view, the second phase 19 positioned in the recess 23 is separated from the second phase 19 positioned between the plurality of second particles 17b positioned away from the coating layer 5. In other words, the second phase 19 located in the recess 23 is surrounded by the first particles 17 a and the coating layer 5.

It should be noted that simply increasing the content ratio of the second phase 19 in the substrate 3 can also improve the bondability of the coating layer 5 to the substrate 3, but if the content ratio of the second phase 19 is increased, the first amount is increased accordingly. The content ratio of the phase 17 is reduced, and the durability of the substrate 3 is reduced.

On the other hand, since the coated tool 1 of the present embodiment can improve the bondability of the coating layer 5 to the base 3 by the second phase 19 located in the recess 23, the content ratio of the first phase 17 in the base 3 It is possible to increase. Therefore, since the content ratio of the first phase 17 is high as compared with the configuration in which the bondability is increased by simply increasing the content ratio of the second phase 19, the durability of the base body 3 can be increased.

In addition, only the second phase 19 may be located in the recess 23, but as shown in FIG. 5, in addition to the second phase 19, third particles 17c that are tungsten carbide particles may be mixed. .

The size of the substrate 3 is not particularly limited. For example, in this embodiment, the length of one side of the first surface 7 is set to about 3 to 20 mm. Further, the height from the first surface 7 to the surface (the lower surface in FIG. 2) located on the opposite side of the first surface 7 is set to about 1 to 20 mm, for example.

The substrate 3 in the present embodiment contains the first phase 17 and the second phase 19. The content ratio of these phases is not limited to a specific value. For example, the content ratio of the first phase 17 can be set to about 60 to 95% by mass. When the content ratio of the first phase 17 is 60% by mass or more, since the content ratio of the first phase 17 that is a hard phase is high, the hardness of the substrate 3 is increased. In addition, when the content ratio of the first phase 17 is 95% by mass or less, the toughness of the substrate 3 is enhanced because the content ratio of the second phase 19 that is the binder phase is high.

The sizes of the first particles 17a and the second particles 17b contained in the first phase 17 are not limited to specific values. For example, it can be set to about 0.1 to 5 μm. When the average particle diameter of the first particles 17a is smaller than the average particle diameter of the second particles 17b in the cross section intersecting the substrate 3 and the coating layer 5, the bondability between the substrate 3 and the coating layer 5 is high. This is because when the average particle diameter of the first particles 17a in contact with the coating layer 5 is relatively small, the number of locations where the second phase 19 and the coating layer 5 are joined increases. This is because the variation in bonding strength at the interface is small.

The size of the concave portion 23 located on the facing surface 21 facing the coating layer 5 in the first particle 17a is not particularly limited. When the depth of the recess 23 is ½ or less of the particle size in the thickness direction of the coating layer 5 in the first particle 17a in which the recess 23 is formed, the first particle in which the recess 23 is formed. The strength of 17a is difficult to decrease. Therefore, the bondability between the substrate 3 and the coating layer 5 is high while maintaining the durability of the substrate 3.

The substrate 3 in the present embodiment has a plurality of first particles 17a. When the opposing surface 21 facing the coating layer 5 in each of the particles positioned on the first surface 7 of the substrate 3 among the plurality of first particles 17a is positioned on the same plane, the first surface 7 has good flatness. Therefore, even when a load is applied to the plurality of first particles 17a in the direction perpendicular to the first surface 7 during the cutting process, the load is less likely to concentrate on some of the first particles 17a.

Thereby, the possibility that the coating layer 5 is peeled off from the substrate 3 is reduced, and the bonding property of the coating layer 5 to the substrate 3 is improved. Note that “on the same plane” does not require that the position is exactly on the same plane. For example, it means that there may be a variation of about 80% of the average particle diameter of the first particles 17a. This variation may be 50% or less of the average particle diameter of the first particles 17a, and may be 10% or less of the average particle diameter of the first particles 17a.

Further, as shown in FIG. 5, when a part of the coating layer 5 protrudes toward the recess 23, the force is applied to the coating layer 5 in a direction parallel to the first surface 7. Since the protruding portion is received by the concave portion 23, it becomes a physical deterrent against peeling of the coating layer 5.

In the coated tool 1 of the present embodiment, the first surface 7 and the second surface 9 of the base 3 are each covered with the coating layer 5. Therefore, the first particles 17 a exist on each of the first surface 7 and the second surface 9. At this time, at least one of the first particles 17 a located on the first surface 7 has a recess 23 on the facing surface 21 facing the coating layer 5, and at least one of the first particles 17 a located on the second surface 9 is covered. You may have the recessed part 23 in the opposing surface 21 which opposes the layer 5. FIG. Further, only the first particles 17 a located on the first surface 7 may have the recesses 23 on the facing surface 21 that faces the coating layer 5.

Since the first surface 7 in the present embodiment has a rake surface region and the second surface 9 has a flank region, the first surface 7 is larger than the second surface 9 during cutting. Easy to apply cutting load. Therefore, when the ratio of the first particles 17a located on the first surface 7 having the recesses 23 is higher than the ratio of the first particles 17a located on the second surface 9 having the recesses 23, particularly the first surface. When only the first particles 17 a located at 7 have the recesses 23, it is possible to improve the bondability between the base 3 and the coating layer 5 on the first surface 7 where a large cutting load is easily applied.

At this time, if the ten-point average roughness of the first surface 7 is smaller than the ten-point average roughness of the second surface 9 in the cross section intersecting the base 3 and the coating layer 5, the first surface 7 is cut during the cutting process. It is difficult for the load to concentrate on the first particles 17a located at the positions. Therefore, the bondability of the coating layer 5 to the substrate 3 is further improved. In the cross section intersecting with the substrate 3 and the coating layer 5, the surface of the second phase existing in the recess 23 is handled as the surface of the substrate 3 when measuring the ten-point average roughness.

The size of the recess 23 in the first particle 17a can be set, for example, such that the width of the recess 23 is about 0.05 to 0.5 μm. Further, the depth of the recess 23 can be set to about 0.03 to 0.3 μm. Here, the width of the recess 23 means the width of the opening in the direction along the first surface 7, and the depth of the recess 23 is a direction orthogonal to the depth of the recess 23. This means the width from the opening at the bottom to the bottom of the recess 23. When the width of the recess 23 is 0.05 μm or more, the contact area between the second phase 19 located in the recess 23 and the coating layer 5 is large. Moreover, it can suppress that the 1st particle | grains 17a are cracked from the recessed part 23 as the width | variety of the recessed part 23 is 0.5 micrometer or less. Moreover, since the contact area of the depth direction with the 2nd phase 19 located in the recessed part 23 and the recessed part 23 becomes large as the depth of the recessed part 23 is 0.03 micrometer or more, it is the 2nd phase located in the recessed part 23. 19 and the recess 23 are highly bondable. Moreover, when the depth of the recessed part 23 shall be 0.3 micrometer or less, it can suppress that the 1st particle | grains 17a break.

The number of recesses 23 per first particle 17a can be set to, for example, about 1 to 5 in a cross-sectional view. When the number of the recesses 23 is one or more, the amount of the second phase 19 positioned in the recesses 23 can be increased to improve the bondability between the substrate 3 and the coating layer 5. Moreover, when the number of the recessed parts 23 is five or less, it can be avoided that the volume of the first particles 17a becomes too small. Therefore, the durability of the first particles 17a can be increased.

The coating layer 5 in the coated tool 1 of the present embodiment can be used, for example, to increase the wear resistance or corrosion resistance of the coated tool 1. Examples of the material of the covering layer 5 include titanium carbide, nitride, oxide, carbonate, nitride oxide, carbonitride, and carbonitride. Further, as the material of the covering layer 5, for example, aluminum oxide (Al ₂ O ₃ ) can be used. The coating layer 5 may contain only one of the above materials, or may contain a plurality. Moreover, the coating layer 5 may be comprised by only one layer, and the structure by which the several layer was laminated | stacked may be sufficient.

For example, the coating layer 5 is located on the base 3 and includes a first layer 25 containing titanium carbonitride (TiCN), and a second layer 27 containing aluminum oxide located on the first layer 25. And may be provided. The covering layer 5 can be positioned on the substrate 3 by using a chemical vapor deposition (CVD) method or a physical vapor deposition (PVD) method.

In the case where the coating layer 5 has a configuration in which a plurality of layers are laminated, the boundary between the above layers and regions is, for example, an electron micrograph (scanning electron microscope (SEM) photo or transmission electron microscope). It can be specified by observing a microscope (TEM: TransmissionTransElectron Microscope).

The elemental analysis of the coating layer 5 and the substrate 3 is evaluated by, for example, Auger analysis or SEM-EDX method using an energy dispersive X-ray spectrometer (EDX) attached to a scanning electron microscope (SEM). Can do. Moreover, confirmation of the contained component which comprises each site | part can be evaluated by using X-ray diffraction (XRD) method, for example.

Further, the second phase 19 contains cobalt as described above, but at this time, the second phase 19 may contain a component constituting the coating layer 5. For example, when the coating layer 5 contains titanium nitride, the second phase 19 may contain at least one of nitrogen (N) and titanium. When the 2nd phase 19 contains the component which comprises the coating layer 5, the joining property of the 2nd phase 19 and the coating layer 5 is improved.

At this time, in order to improve the bondability between the first phases 17 adjacent via the second phase 19, the content ratio of cobalt in the second phase 19 is higher than the content ratio of the components constituting the coating layer 5. Is desirable. In addition, what is necessary is just to evaluate said content ratio by the mass%.

Particularly, in the second phase 19, when the inside of the recess 23 is the first part and the outside of the recess 23 is the second part, the content of the component constituting the coating layer 5 in the first part is the coating in the second part. The content of the component constituting the layer 5 may be larger. When it has such a structure, the intensity | strength of the base | substrate 3 can be raised, improving the adhesiveness of the coating layer 5 and the base | substrate 3 for the following reasons. The first reason is that, in the first portion of the second phase 19, the bondability between the first phase 17 and the coating layer 5 existing in the recess 23 is enhanced. The second reason is that, in the second portion of the second phase 19, the bonding properties between the adjacent first phases 17 through the second phase 19 are maintained.

The comparison between the content of the component constituting the coating layer 5 in the first part of the second phase 19 and the content of the component constituting the coating layer 5 in the second part of the second phase 19 is, for example, The components constituting the coating layer 5 are each composed of a portion of the second phase 19 at 10 or more positions located in the recess 23 and a portion of the second phase 19 located at 10 or more locations located in the region excluding the recess 23. What is necessary is just to measure content and compare the average value in these parts.

The base 3 in the present embodiment has a first surface 7 and a through hole 29 that penetrates a surface located on the opposite side of the first surface 7. The through hole 29 can be used for inserting a fixing member for fixing the coated tool 1 to the holder. Examples of the fixing member include a screw and a clamp member.

<Manufacturing method>
Next, the manufacturing method of the coated tool 1 which concerns on this embodiment is demonstrated.

First, a metal powder, a carbon powder, etc. are appropriately added and mixed to an inorganic powder selected from carbides, nitrides, carbonitrides, oxides, and the like that can form a hard alloy to be the base 3 by firing. Is made. Next, the mixed powder is formed into a predetermined tool shape by using a known forming method to produce a formed body. Examples of the molding method include press molding, cast molding, extrusion molding, and cold isostatic pressing. The base body 3 is produced by firing the molded body in a vacuum or in a non-oxidizing atmosphere.

At this time, for example, by making the surface roughness of the portion that contacts the first surface 7 out of the mold for molding the base 3 larger than the surface roughness of the portion that contacts the second surface 9, the first surface The concave portion 23 can be formed on the facing surface 21 facing the coating layer 5 in at least one of the first particles 17 a located at 7. For example, if a diamond coating film is provided on the surface of the mold, the recesses 23 can be easily formed. In addition to the first particles 17a, the recesses 23 may be formed in the second phase 19 during molding, but the recesses 23 formed in the second phase 19 are almost eliminated by firing.

Furthermore, the recesses 23 may be formed in the first particles 17a by subjecting the substrate surface to grinding and polishing. First, in order to provide the recessed part 23 in the surface of the base | substrate 3 after baking, it grinds. As it is, since the surface of the substrate 3 becomes too rough, further polishing is performed to remove a part of the scratch while leaving the recess 23 on the surface of the first particle.

At that time, cobalt, nickel, or the like that was a part of the base body 3 enters the recess 23 formed by grinding. Depending on the polishing conditions, the third particles 17 c made of tungsten carbide particles together with cobalt and nickel enter the recess 23. Alternatively, nickel powder or cobalt powder may be rubbed against the surface of the substrate 3 so that nickel or cobalt exists in the recess 23.

Next, the coating layer 5 is formed on the surface of the substrate 3 by chemical vapor deposition (CVD). In this step, first, the substrate 3 is heated. By this heating, the bonding force between the recess 23 and the second phase 19 existing in the recess 23 is increased.

First, a first layer 25 containing titanium carbonitride is formed. A first mixed gas is prepared by mixing hydrogen gas with 0.5 to 10% by volume titanium tetrachloride gas, 5 to 60% by volume nitrogen gas, and 0.1 to 3% by volume acetonitrile gas. To do. The first mixed gas is introduced into the chamber to form a first layer 25 containing MT-titanium carbonitride.

Next, a second layer 27 containing aluminum oxide is formed. The film forming temperature 950 ° C.-1100 ° C., a gas pressure of 5 kPa - 20 kPa, the composition of the reaction gas, hydrogen gas, 5% to 15% by volume of aluminum trichloride (AlCl ₃₎ gas, 0.5 volume % To 2.5% by volume hydrogen chloride (HCl) gas, 0.5% to 5.0% by volume carbon dioxide gas, 0% to 1% by volume hydrogen sulfide (H ₂ S) gas, Are mixed to produce a second mixed gas. The second mixed gas is introduced into the chamber, and the second layer 27 is formed.

Thereafter, if necessary, a portion corresponding to the cutting edge 11 on the surface of the formed coating layer 5 is polished. When such a polishing process is performed, the welding of the work material to the portion corresponding to the cutting edge 11 in the coating layer 5 is easily suppressed, so that the coated tool 1 is further excellent in fracture resistance.

In addition, said manufacturing method is an example of the method of manufacturing the coating tool 1 of this embodiment. Therefore, it goes without saying that the coated tool 1 of the present embodiment is not limited to the one produced by the above manufacturing method. For example, a third layer (not shown) may be separately formed on the second layer 27.

<Cutting tools>
Next, a cutting tool 101 according to an embodiment will be described with reference to the drawings.

As shown in FIGS. 6 and 7, the cutting tool 101 according to the present embodiment is a rod-like body that extends from a first end (upper end in FIG. 6) toward a second end (lower end in FIG. 6). A holder 105 having a pocket 103 located on the side of the arm and a covering tool 1 located in the pocket 103. In the cutting tool 101 of this embodiment, the covering tool 1 is mounted so that at least a part of a portion used as a cutting edge on the ridge line protrudes from the tip of the holder 105.

The pocket 103 is a part to which the covering tool 1 is attached, and has a seating surface parallel to the lower surface of the holder 105 and a restraining side surface inclined with respect to the seating surface. Further, the pocket 103 is opened on the first end side of the holder 105.

The covering tool 1 is located in the pocket 103. At this time, the lower surface of the covering tool 1 may be in direct contact with the pocket 103, or a sheet may be sandwiched between the covering tool 1 and the pocket 103.

The covering tool 1 is mounted such that a portion used as a cutting edge on the ridge line protrudes outward from the holder 105. In the present embodiment, the coated tool 1 is attached to the holder 105 with screws 107. That is, the screw 107 is inserted into the through-hole of the covering tool 1, the tip of the screw 107 is inserted into a screw hole (not shown) formed in the pocket 103, and the screw portions are screwed together, thereby covering the covering tool 1. Is mounted on the holder 105.

As the holder 105, steel, cast iron or the like can be used. In particular, it is preferable to use steel having high toughness among these members.

In this embodiment, the cutting tool used for so-called turning is illustrated as the coated tool 1. Examples of the turning process include an inner diameter process, an outer diameter process, and a grooving process. The cutting tool is not limited to that used for turning. For example, you may use the covering tool 1 of said embodiment for the cutting tool used for a rolling process.

1 ... Coated tool (cutting tool)
DESCRIPTION OF SYMBOLS 3 ... Base | substrate 5 ... Covering layer 7 ... 1st surface 9 ... 2nd surface 11 ... Cutting blade 13 ... 1st area | region 15 ... 2nd area | region 17 ... 1st 1 phase 17a ·· 1st particle 17b · · 2nd particle 17c · · 3rd particle 19 · · · second phase 21 · · · opposing surface 23 · · · concave portion 25 · · · first layer 27 · · · first 2 layers 29 ... through hole 101 ... cutting tool 103 ... pocket 105 ... holder 107 ... fixing screw

Claims

A coated tool comprising a substrate having a first phase containing a plurality of tungsten carbide particles and a second phase containing at least one of cobalt and nickel, and a coating layer positioned on the substrate,
The plurality of tungsten carbide particles have a plurality of first particles in contact with the coating layer, and a plurality of second particles positioned away from the coating layer,
A coated tool, wherein at least one of the plurality of first particles has a recess on a surface facing the coating layer, and the second phase is located in the recess.
The coated tool according to claim 1, wherein the concave portion further includes third particles made of tungsten carbide particles.
3. The average particle diameter of the plurality of first particles is smaller than the average particle diameter of the plurality of second particles in a cross section intersecting the base and the coating layer. Coated tool.
The coated tool according to any one of claims 1 to 3, wherein the facing surfaces of each of the plurality of first particles are located on the same surface.
The covering tool according to any one of claims 1 to 4, wherein a part of the covering layer protrudes toward the concave portion.
The coated tool according to any one of claims 1 to 5, wherein the second phase contains a component constituting the coating layer.
Of the second phase, when the inside of the recess is a first part and the outside of the recess is a second part,
The coating tool according to claim 6, wherein the content of the component constituting the coating layer in the first part is larger than the content of the component constituting the coating layer in the second part.
The base body has a first surface having a rake face area and a second face having a flank face area;
The coated tool according to any one of claims 1 to 7, wherein the concave portion is located only on the first surface.
The coated tool according to claim 8, wherein a ten-point average roughness of the first surface is smaller than a ten-point average roughness of the second surface in a cross section intersecting the base and the coating layer.
A holder having a pocket extending from the first end toward the second end and having a pocket located on the first end side;
A cutting tool having a coated tool according to any one of claims 1 to 9 located in the pocket.