Method for manufacturing coated tools, cutting tools, and cut works.

Abstract

To provide a coating tool that can improve durability. [Solution] The coating film has a first surface including a rake face region and a second surface adjacent to the first surface and including a flank face region, and the coating film contains cubic crystals located on the first surface and cubic crystals located on the second surface, and the intensity of the diffraction peak I(1,200) corresponding to the (200) plane of the crystal lattice of the cubic crystal located on the first surface in the X-ray diffraction pattern, the intensity of the diffraction peak I(2,200) corresponding to the (200) plane of the crystal lattice of the cubic crystal located on the second surface, the intensity of the diffraction peak I(1,220) corresponding to the (220) plane of the crystal lattice of the cubic crystal located on the first surface, and the intensity of the diffraction peak I(2,220) corresponding to the (220) plane of the crystal lattice of the cubic crystal located on the second surface is I(1,200) / I(1,220)

Description

[Technical Field]

[0001] Embodiments of this disclosure relate to coating tools, cutting tools, and methods for manufacturing cut works. [Background technology]

[0002] As cutting tools used in machining processes such as turning or milling, coated tools are known in which the surface of a substrate such as cemented carbide, cermet, or ceramics is coated with a coating film to improve wear resistance and other properties.

[0003] For example, a coated tool is known that comprises a base material and a hard coating on the base material, wherein the hard coating is a nitride containing 65 to 90 atomic percent of Al and 10 to 35 atomic percent of Cr relative to the total amount of metal elements, and has a face-centered cubic lattice structure, and in X-ray diffraction, when the peak intensity of the (111) plane of the face-centered cubic lattice structure is Ia and the peak intensity of the (200) plane is Ib, the ratio Ia / Ib is 4 to 8 (see, for example, Patent Document 1). [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2024-027836 [Overview of the project] [Problems that the invention aims to solve]

[0005] For example, to improve the durability of cutting tools, it is necessary to improve the durability of the coating film used on the cutting tools. Thus, there is room for further improvement in conventional technology in terms of enhancing durability.

[0006] One embodiment of the invention has been made in view of the above, and aims to provide a covering tool capable of improving durability. Means for Solving the Problems

[0007] A coated tool according to one aspect of an embodiment includes a base body, and a coating film located on a surface of the base body. The coating film has a first surface including a region of a rake face, and a second surface adjacent to the first surface and including a region of a flank face. The coating film includes cubic crystals located on the first surface and cubic crystals located on the second surface. The intensity I(1,200) of the diffraction peak corresponding to the (200) plane of the crystal lattice of the cubic crystals located on the first surface in the X-ray diffraction pattern, the intensity I(2,200) of the diffraction peak corresponding to the (200) plane of the crystal lattice of the cubic crystals located on the second surface in the X-ray diffraction pattern, the intensity I(1,220) of the diffraction peak corresponding to the (220) plane of the crystal lattice of the cubic crystals located on the first surface in the X-ray diffraction pattern, and the intensity I(2,220) of the diffraction peak corresponding to the (220) plane of the crystal lattice of the cubic crystals located on the second surface in the X-ray diffraction pattern satisfy the relationship of I(1,200) / I(1,220) < I(2,200) / I(2,220). Effects of the Invention

[0008] According to one aspect of the embodiment, it is possible to provide a coated tool capable of improving durability. Brief Description of the Drawings

[0009] [Figure 1] Figure 1 is a perspective view showing an example of the coated tool according to the embodiment. [Figure 2] Figure 2 is a side sectional view showing an example of the coated tool according to the embodiment. [Figure 3] Figure 3 is a cross-sectional view showing an example of the configuration of the coating film according to the embodiment. [Figure 4] Figure 4 is a schematic diagram showing an example of the X-ray diffraction pattern of the coating film according to the embodiment. [Figure 5] Figure 5 is a diagram schematically showing an example of an AIP apparatus. [Figure 6A]FIG. 6A is a diagram schematically illustrating an example of the angle between two cathode electrodes in the horizontal direction relative to the revolution axis in an AIP apparatus. [Figure 6B] FIG. 6B is a diagram schematically illustrating an example of the angle between two cathode electrodes in the horizontal direction relative to the revolution axis in an AIP apparatus. [Figure 6C] FIG. 6C is a diagram schematically illustrating an example of the angle between two cathode electrodes in the horizontal direction relative to the revolution axis in an AIP apparatus. [Figure 7] FIG. 7 is a front view showing an example of the cutting tool according to the embodiment. [Figure 8A] FIG. 8A is a schematic diagram showing one step of the method for manufacturing a cut workpiece according to the embodiment. [Figure 8B] FIG. 8B is a schematic diagram showing one step of the method for manufacturing a cut workpiece according to the embodiment. [Figure 8C] FIG. 8C is a schematic diagram showing one step of the method for manufacturing a cut workpiece according to the embodiment. [Figure 9] FIG. 9 is a diagram showing the conditions for forming coating films for the coated tools according to Examples 1 to 11 and the coated tools according to Comparative Examples 1 and 2. [Figure 10] FIG. 10 is a diagram showing information on the X-ray diffraction patterns of the coating films in each of the coated tools according to Examples 1 to 11 and the coated tools according to Comparative Examples 1 and 2. [Figure 11] FIG. 11 is a diagram showing the results of cutting tests for the coated tools according to Examples 1 to 11 and the coated tools according to Comparative Examples 1 and 2. [Mode for Carrying Out the Invention]

[0010] Hereinafter, embodiments for implementing the coated tool, cutting tool, and method for manufacturing a cut workpiece according to the present disclosure (hereinafter referred to as "embodiments") will be described in detail with reference to the drawings. The present disclosure is not limited to the coated tool, cutting tool, and method for manufacturing a cut workpiece according to these embodiments. The respective embodiments can be appropriately combined within a range that does not contradict the processing contents. In the following respective embodiments, the same reference numerals are assigned to the same parts, and duplicate descriptions are omitted.

[0011] In the embodiments described below, expressions such as "constant", "orthogonal", "perpendicular", or "parallel" may be used, but these expressions do not need to be strictly "constant", "orthogonal", "perpendicular", or "parallel". That is, each of the above expressions allows for deviations such as those arising from manufacturing precision or installation precision.

[0012] <Coated Tool> First, an example of the coated tool according to the embodiment will be described with reference to FIG. 1. FIG. 1 is a perspective view showing an example of the coated tool according to the embodiment. As shown in FIG. 1, the coated tool 1 according to the embodiment may be, for example, an insert attached to a cutting tool.

[0013] The coated tool 1 has, for example, a hexahedral shape in which the top surface 11 and the bottom surface (the surface intersecting the Z-axis shown in FIG. 1) are substantially parallelogram-shaped. The coated tool 1 according to the embodiment has the bottom surface on the side opposite to the top surface 11, and has side surfaces 12 between the top surface 11 and the bottom surface. The top surface 11 is an example of a first surface. The side surface 12 is an example of a second surface. The side surface 12 is adjacent to the top surface 11 and the bottom surface. A land may be provided between the top surface 11 or the bottom surface and the side surface 12.

[0014] One corner of the coated tool 1 may function as a cutting edge. The cutting edge has, for example, a rake face region 13 on a part of the upper surface 11 and a relief face region 14 on a part of the side surface 12. That is, the upper surface 11 includes the rake face region 13. The side surface 12 includes the relief face region 14. Here, the rake face is the surface from which chips flow when cutting the workpiece. The relief face is a surface located perpendicular to the rake face. At least a portion of the ridge where the upper surface 11 and the side surface 12 intersect is located where the cutting edge is positioned, and the coated tool 1 cuts the workpiece by applying this cutting edge to the workpiece.

[0015] A through-hole 15 is located in the center of the coating tool 1, passing through it vertically. The central axis of the through-hole 15 may pass through the center of the upper surface 11 and the center of the lower surface. A screw 75 (see Figure 7), which will be described later, is inserted into the through-hole 15 for attaching the coating tool 1 to a holder 70 (see Figure 7), which will be described later.

[0016] The shape of the coating tool 1 shown in Figure 1 is merely an example, and the shape of the coating tool according to this disclosure is not limited to the shape shown in Figure 1. The coating tool according to this disclosure may, for example, have a rod-shaped body having a rotating shaft and extending from a first end to a second end, a cutting edge located at the first end of the body, and a groove extending spirally from the cutting edge toward the second end of the body.

[0017] Figure 2 is a side cross-sectional view showing an example of a coating tool according to an embodiment. The cross-section shown in Figure 2 may be parallel to the central axis of the through hole 15. As shown in Figure 2, the coating tool 1 comprises a base body 2 and at least one coating film 3.

[0018] (Base 2) The base material 2 is formed, for example, from a cemented carbide. The cemented carbide includes a hard phase containing at least tungsten (W), specifically tungsten carbide (WC). The cemented carbide may also include a binder phase containing at least one iron group element such as nickel (Ni) and cobalt (Co). As an example, the base material 2 may be a WC-based cemented carbide mainly composed of hard particles made of WC. Here, mainly composed of hard particles made of WC means that hard particles made of WC constitute 80% by mass or more of the total cemented carbide. When the base material 2 is formed from a cemented carbide, the heat resistance of the base material 2 is improved.

[0019] The substrate 2 may be formed of a cermet. The cermet may include, for example, titanium (Ti), specifically titanium carbide (TiC), titanium nitride (TiN), or titanium carbonitride (TiCN). The cermet may also contain at least one iron group element such as nickel (Ni) and cobalt (Co).

[0020] The substrate 2 may be a cubic boron nitride sintered body containing cubic boron nitride (cBN) particles. The substrate 2 is not limited to cubic boron nitride (cBN) particles, but may also contain particles such as hexagonal boron nitride (hBN), rhombohedral boron nitride (rBN), wurtzite boron nitride (wBN), etc.

[0021] The substrate 2 may be formed of ceramics. The ceramics may, for example, contain aluminum oxide (Al2O3). Examples of aluminum oxide include κ-Al2O3 and α-Al2O3. In addition to aluminum oxide, the ceramics may contain other elements. For example, in addition to aluminum oxide, the ceramics may contain at least one element from among magnesium (Mg), calcium (Ca), strontium (Sr), silicon (Si), and elements from groups 3 and 4 of the periodic table.

[0022] (Coating film 3) The coating film 3 is located on the surface of the substrate 2. The coating film 3 coats the substrate 2, for example, to improve the wear resistance of the substrate 2. In the example in Figure 2, the coating film 3 covers the entire substrate 2. When the coating film 3 is located on the surface of the substrate 2, the wear resistance of the surface on which the coating film 3 is located in the coating tool 1 is improved. The composition of the coating film 3 will be described later.

[0023] Here, an example of the configuration of the coating film according to the embodiment will be described with reference to Figure 3. Figure 3 is a cross-sectional view showing an example of the configuration of the coating film according to the embodiment.

[0024] As shown in Figure 3, the coating tool 1 according to this embodiment comprises a base body 2 and a coating film 3 located on the surface of the base body 2. The coating film 3 is located on the surface of the base body 2 such that it has an upper surface 11 including a scooping surface region 13 (see Figure 1) and a side surface 12 including a relief surface region 14 (see Figure 1). The upper surface 11 is an example of a first surface. The side surface 12 is an example of a second surface. The side surface 12 is adjacent to the upper surface 11. A land may be provided between the upper surface 11 and the side surface 12.

[0025] As shown in Figure 3, the coating film 3 may include, for example, a first layer 31. The first layer 31 may be located on the surface side of the coating film 3, i.e., on the side opposite to the substrate 2. The boundary between the first layer 31 and the substrate 2, as well as the boundary between the first layer 31 and the other layers included in the coating film 3, can be observed, for example, by analyzing a cross-section of the coating tool 1 with a scanning electron microscope (SEM).

[0026] The first layer 31 contains at least one primary metallic element and nitrogen (N). Here, the at least one primary metallic element includes at least one element selected from the group consisting of elements from groups 4, 5, and 6 of the periodic table, excluding titanium (Ti).

[0027] In this case, it is easy to improve the hardness of the coating film 3. As a result, it is easy to improve the wear resistance of the coating film 3. Furthermore, it is easy to improve the heat resistance of the coating film 3. Accordingly, it is easy to improve the machining performance of the coated tool 1 under specific machining conditions.

[0028] At least one of the first metallic elements may be chromium (Cr).

[0029] In this case, it is easier to maintain an appropriate hardness for the coating film 3 and improve its corrosion resistance. Accordingly, it is easier to reduce friction of the coating film 3 against workpieces with high reactivity, such as titanium alloys. As a result, it is easier to extend the tool life of the coated tool 1.

[0030] The chromium content in at least one of the first metal elements may be 80 atomic percent or more. More specifically, the ratio of the chromium content in the first layer 31 to the total content of the first metal elements contained in the first layer 31 may be 80 atomic percent or more.

[0031] In this case, the corrosion resistance of the coating film 3 can be further improved. Accordingly, the chemical reaction between the titanium alloy and the coated tool 1 can be reduced. As a result, the deterioration of the coated tool 1 can be reduced. Furthermore, the friction of the coating film 3 with respect to the workpiece of the titanium alloy can be further reduced. Accordingly, the cutting resistance of the coated tool 1 with respect to the workpiece can be reduced. As a result, the heat generated by the coated tool 1 during cutting can be reduced. Therefore, the thermal expansion of the coated tool 1 can be reduced. Accordingly, the machining accuracy of the coated tool 1 with respect to the workpiece can be improved.

[0032] The first layer 31 may further contain boron (B).

[0033] In this case, it is easier to improve the hardness of the coating film 3. Accordingly, it is easier to improve the wear resistance of the coating film 3. Furthermore, it is easier to stabilize the performance of the coating film 3 even when its temperature rises. As a result, for example, even under high-speed cutting and / or high-temperature machining conditions, it is easier to reduce the deterioration of the coated tool 1 due to the heat generated during cutting. In other words, it is easier to stabilize the machining performance of the coated tool 1.

[0034] The composition of the first layer 31 is, for example, Cr a M b B c It may also be N. Here, M is at least one metal selected from the elements of groups 4, 5, and 6 of the periodic table, excluding Ti and Cr. a, b, and c are such that 0.5 ≤ a ≤ 1, 0 ≤ b ≤ 0.5, and 0 ≤ c ≤ 0.3, and a + b + c = 1. The numerical ranges of a, b, and c may also be the numerical ranges of the proportion of each element's content to the total content of the metallic elements in the first layer 31. The first layer 31 does not have to contain M. The first layer 31 does not have to contain B. As an example, the composition of the first layer 31a may be CrBN.

[0035] The thickness of the first layer 31 may be, for example, 1000 nm or more and 3000 nm or less.

[0036] As shown in Figure 3, the coating film 3 may further include, for example, a second layer 32. The second layer 32 may be located closer to the substrate 2 than the first layer 31. The boundary between the second layer 32 and the substrate 2, as well as the boundary between the second layer 32 and the other layers included in the coating film 3, can be observed, for example, by analyzing a cross-section of the coating tool 1 with a scanning electron microscope (SEM).

[0037] The second layer 32 contains at least one secondary metallic element and nitrogen (N). The at least one secondary metallic element includes at least one element selected from the group consisting of elements in groups 4, 5, and 6 of the periodic table.

[0038] In this case, since the first layer 31 and the second layer 32 have different physical properties (e.g., elastic modulus and / or coefficient of thermal expansion), stress distribution in the coating film 3 is promoted. As a result, the overall adhesion of the coating film 3 is easily improved. Accordingly, the risk of peeling and / or cracking of the coating film 3 is easily reduced.

[0039] At least one secondary metallic element includes aluminum (Al) and titanium (Ti), and the content of aluminum in at least one secondary metallic element may be higher than the content of titanium in at least one secondary metallic element. More specifically, the ratio of the aluminum content in the second layer 32 to the total content of secondary metallic elements in the second layer 32 may be higher than the ratio of the titanium content in the second layer 32 to the total content of secondary metallic elements in the second layer 32.

[0040] In this case, it is easier to improve the hardness of the coating film 3. Accordingly, it is easier to improve the wear resistance of the coating film 3. As a result, it is easier to extend the life of the coated tool 1.

[0041] The aluminum content in at least one of the second metal elements may be 50 atomic percent or more, and the titanium content in at least one of the second metal elements may be 30 atomic percent or more. More specifically, the ratio of the aluminum content in the second layer 32 to the total content of all metal elements in the second layer 32 may be 50 atomic percent or more. The ratio of the titanium content in the second layer 32 to the total content of all metal elements in the second layer 32 may be 30 atomic percent or more.

[0042] In this case, it is easier to stabilize the performance of the coating film 3 even under processing conditions where the temperature of the coating film 3 rises.

[0043] The second layer 32 may further contain boron (B).

[0044] In this case, it is easier to improve the hardness of the coating film 3. Accordingly, it is easier to improve the wear resistance of the coating film 3. As a result, it is easier to reduce wear on the coated tool 1. In particular, when machining alloys with high hardness, it is easier to extend the tool life of the coated tool 1.

[0045] The composition of the second layer 32 is, for example, Al d Ti e M f B g N may also be used. Here, M is at least one metal selected from the elements of groups 4, 5, and 6 of the periodic table, excluding Ti. d, e, f, and g are such that 0.4 ≤ d ≤ 0.6, 0 ≤ e ≤ 0.6, 0 ≤ f ≤ 0.5, and 0 ≤ g ≤ 0.3, and d + e + f + g = 1. The numerical ranges of d, e, f, and g may also be the numerical ranges of the proportion of each element's content to the total content of the metallic elements in the second layer 32. The second layer 32 does not need to contain M. The second layer 32 does not need to contain B. As an example, the composition of the second layer 32 may be AlTiBN.

[0046] The thickness of the second layer 32 may be, for example, 1000 nm or more and 4000 nm or less.

[0047] The presence and content of at least one primary metal element and boron in the first layer 31 can be determined, for example, by using an energy-dispersive X-ray analyzer (EDS) attached to a scanning transmission electron microscope (STEM). Similarly, the presence and content of at least one secondary metal element and boron in the second layer 32 can be determined, for example, by using an energy-dispersive X-ray analyzer (EDS) attached to a scanning transmission electron microscope (STEM). The presence and content of the above elements can also be determined by secondary ion mass spectrometry (SIMS).

[0048] As shown in Figure 3, the coating film 3 contains cubic crystals 33. If the coating film 3 includes a first layer 31 and a second layer 32, each of the first layer 31 and the second layer 32 may contain cubic crystals 33. As shown in Figure 3, the coating film 3 may also contain hexagonal crystals 34. If the coating film 3 includes a first layer 31 and a second layer 32, each of the first layer 31 and the second layer 32 may contain hexagonal crystals 34.

[0049] As shown in Figure 3, the coating film 3 includes cubic crystals 33 located on the upper surface 11 and cubic crystals 33 located on the side surface 12. As shown in Figure 3, the coating film 3 may further include hexagonal crystals 34 located on the upper surface 11 and hexagonal crystals 34 located on the side surface 12.

[0050] The crystal lattice of the cubic crystal 33 may be, for example, a face-centered cubic (fcc) lattice. The crystal lattice of the hexagonal crystal 34 may be, for example, a hexagonal close-packed (hcp) structure.

[0051] The presence of cubic crystals 33 and hexagonal crystals 34 in the coating film 3 can be confirmed, for example, by obtaining the X-ray diffraction pattern of the coating film 3. The X-ray diffraction pattern of the coating film 3 can be obtained, for example, by using an X-ray diffractometer (XRD). An example of an X-ray diffractometer is the X-ray analyzer D8 DISCOVER (manufactured by Bruker).

[0052] Next, the X-ray diffraction pattern of the coating film according to the embodiment will be described with reference to Figure 4. Figure 4 is a schematic diagram showing an example of the X-ray diffraction pattern of the coating film according to the embodiment. In Figure 4, the horizontal axis and vertical axis represent the X-ray diffraction angle 2θ(°) and the intensity of the diffracted X-rays, respectively. Here, θ(°) is the Bragg angle. As described above, the X-ray diffraction pattern of the coating film 3 is obtained, for example, by using an X-ray diffractometer (XRD).

[0053] As shown in Figure 4, the X-ray diffraction patterns of the coating film 3 are obtained as the X-ray diffraction patterns of the coating film 3 on the upper surface 11 and on the side surface 12 of the coating film 3. In Figure 4, examples of the X-ray diffraction patterns of the coating film 3 on the upper surface 11 and on the side surface 12 of the coating film 3 are shown on the top and bottom sides, respectively. The range of the diffraction angle 2θ in the X-ray diffraction pattern of the coating film 3 may be, for example, in the range of 30° to 70° when using characteristic X-rays of CuKα with a wavelength of 0.15418 nm.

[0054] As shown in Figure 4, the X-ray diffraction pattern of the coating film 3 on the upper surface 11 includes diffraction peaks P(1,220) corresponding to the (220) plane of the crystal lattice of the cubic crystal 33 (see Figure 3) located on the upper surface 11, diffraction peaks P(1,111) corresponding to the (111) plane of the crystal lattice of the cubic crystal 33 located on the upper surface 11, diffraction peaks P(1,200) corresponding to the (200) plane of the crystal lattice of the cubic crystal 33 located on the upper surface 11, and diffraction peaks P(1,110) corresponding to the (110) plane of the crystal lattice of the hexagonal crystal 34 (see Figure 3) located on the upper surface 11.

[0055] As shown in Figure 4, the X-ray diffraction pattern of the coating film 3 at the side surface 12 includes diffraction peaks P(2,220) corresponding to the (220) plane of the crystal lattice of the cubic crystal 33 located at side surface 12, diffraction peaks P(2,111) corresponding to the (111) plane of the crystal lattice of the cubic crystal 33 located at side surface 12, diffraction peaks P(2,200) corresponding to the (200) plane of the crystal lattice of the cubic crystal 33 located at side surface 12, and diffraction peaks P(2,110) corresponding to the (110) plane of the crystal lattice of the hexagonal crystal 34 located at side surface 12.

[0056] As shown in Figure 4, the intensity I(1,200) of the diffraction peak corresponding to the (200) plane of the crystal lattice of the cubic crystal 33 located on the upper surface 11 in the X-ray diffraction pattern, the intensity I(2,200) of the diffraction peak corresponding to the (200) plane of the crystal lattice of the cubic crystal 33 located on the side surface 12 in the X-ray diffraction pattern, the intensity I(1,220) of the diffraction peak P(1,220) corresponding to the (220) plane of the crystal lattice of the cubic crystal 33 located on the upper surface 11 in the X-ray diffraction pattern, and the intensity I(2,220) of the diffraction peak P(2,220) corresponding to the (220) plane of the crystal lattice of the cubic crystal 33 located on the side surface 12 in the X-ray diffraction pattern are, I(1,200) / I(1,220) <I(2,200) / I(2,220) The following relationship is satisfied. Here, I(1,200), I(2,200), I(1,220), and I(2,220) may be the maximum intensity of diffraction peak P(1,200), the maximum intensity of diffraction peak P(2,200), the maximum intensity of diffraction peak P(1,220), and the maximum intensity of diffraction peak P(2,220), respectively. As will be described later, if diffraction peak P(2,200) includes a first diffraction peak P1 and a second diffraction peak P2, I(2,200) may be the greater of the maximum intensity I(P1) of the first diffraction peak P1 and the maximum intensity I(P2) of the second diffraction peak P2.

[0057] In this case, it is easier to increase I(1,220) relative to I(1,200) and I(2,200) relative to I(2,220). Accordingly, it is easier to control the orientation of the cubic crystals 33 located on the upper surface 11 including the rake face region 13 so as to more efficiently distribute the internal stress of the coating film 3 on the upper surface 11 including the rake face region 13 (see Figure 1). As a result, it is easier to reduce the peeling and / or cracking of the coating film 3 on the upper surface 11 including the rake face region 13. Thus, it is easier to improve the wear resistance and / or fracture resistance of the coating film 3. Furthermore, it is easier to control the orientation of the cubic crystals 33 located on the side surface 12 including the flank face region 14 so as to more evenly distribute the internal stress of the coating film 3 on the side surface 12 including the flank face region 14 (see Figure 1). As a result, it is easier to reduce the peeling and / or cracking of the coating film 3 on the side surface 12 including the flank face region 14. In this way, it is possible to improve the durability of the coating tool 1 (see Figure 1, etc.). In other words, it becomes possible to extend the lifespan of the coating tool 1.

[0058] I(1,200), I(2,200), I(1,220), and I(2,220) are, (I(1,200) / I(1,220)) / (I(2,200) / I(2,220))<0.5 The relationship may be satisfied.

[0059] In this case, it is easier to further increase I(1,220) relative to I(1,200), and to further increase I(2,200) relative to I(2,220). Accordingly, it is easier to control the orientation of the cubic crystals 33 located on the upper surface 11 including the rake face region 13 so as to more efficiently distribute the internal stress of the coating film 3 on the upper surface 11 including the rake face region 13. As a result, it is easier to reduce the peeling and / or cracking of the coating film 3 on the upper surface 11 including the rake face region 13. Furthermore, it is easier to control the orientation of the cubic crystals 33 located on the side surface 12 including the flank face region 14 so as to more evenly distribute the internal stress of the coating film 3 on the side surface 12 including the flank face region 14. As a result, it is easier to reduce the peeling and / or cracking of the coating film 3 on the side surface 12 including the flank face region 14. This makes it possible to further improve the wear resistance and / or fracture resistance of the coated tool 1.

[0060] I(1,220) and I(2,220) are, I(1,220) / I(2,220)>1.0 The relationship may be satisfied.

[0061] In this case, it is easier to increase I(1,220) relative to I(2,220). Accordingly, it is easier to control the orientation of the cubic crystals 33 located on the upper surface 11 including the rake face region 13 so as to reduce the strain of the coating film 3 on the upper surface 11 including the rake face region 13 with respect to the sliding deformation of the coating film 3. As a result, it is easier to reduce the strain of the coating film 3 with respect to the plastic deformation of the coating film 3. Furthermore, it is easier to control the orientation of the cubic crystals 33 located on the upper surface 11 including the rake face region 13 so as to more efficiently distribute the thermal load applied to the coating film 3 on the upper surface 11 including the rake face region 13 during cutting. As a result, it is easier to stabilize the wear resistance and / or fracture resistance of the coating film 3 even under conditions where the load applied to the coating film 3 increases, such as under high-speed cutting conditions.

[0062] I(1,200), I(1,220), the intensity of diffraction peak P(1,111) corresponding to the (111) plane of the crystal lattice of the cubic crystal 33 located on the upper surface 11 in the X-ray diffraction pattern, and the intensity of diffraction peak P(1,110) corresponding to the (110) plane of the crystal lattice of the hexagonal crystal 34 located on the upper surface 11 in the X-ray diffraction pattern, are: I(1,220) / (I(1,220)+I(1,200)+I(1,111)+I(1,110))>0.3 The following relationship may be satisfied. Here, I(1,200), I(1,111), and I(1,110) may be the maximum intensity of diffraction peak P(1,200), the maximum intensity of diffraction peak P(1,111), and the maximum intensity of diffraction peak P(1,110), respectively.

[0063] In this case, it is easier to increase I(1,220) relative to I(1,200), I(1,111), and I(1,110). Accordingly, it is easier to control the orientation of the cubic crystals 33 located on the upper surface 11 including the rake face region 13 so as to reduce the strain of the coating film 3 on the upper surface 11 including the rake face region 13 with respect to the sliding deformation of the coating film 3. As a result, it is easier to reduce the strain of the coating film 3 with respect to the plastic deformation of the coating film 3. Thus, it is easier to improve the wear resistance and / or fracture resistance of the coating film 3. Furthermore, it is easier to control the orientation of the cubic crystals 33 located on the upper surface 11 including the rake face region 13 so as to more efficiently distribute the thermal load applied to the coating film 3 on the upper surface 11 including the rake face region 13 during cutting. As a result, it is easier to stabilize the wear resistance and / or fracture resistance of the coating film 3 even under conditions where the load applied to the coating film 3 increases, such as high-speed cutting conditions.

[0064] As shown in Figure 4, the intensity I(1,111) of the diffraction peak P(1,111) corresponding to the (111) plane of the crystal lattice of the cubic crystal 33 located on the upper surface 11 in the X-ray diffraction pattern, and the intensity I(2,111) of the diffraction peak P(2,111) corresponding to the (111) plane of the crystal lattice of the cubic crystal 33 located on the side surface 12 in the X-ray diffraction pattern, I(2,111) / I(1,111)>3 The following relationship is satisfied. Here, I(2,111) may be the maximum value of the intensity of the diffraction peak P(2,111).

[0065] In this case, it is easier to increase I(2,111) relative to I(1,111). Accordingly, it is easier to control the orientation of the cubic crystals 33 located on the side surface 12 including the flank region 14 so as to improve the hardness of the coating film 3 on the side surface 12 including the flank region 14 (see Figure 1). As a result, it is easier to improve the durability of the coating film 3 on the side surface 12 including the flank region 14 against abrasive friction applied to the coating film 3. Thus, it is easier to improve the wear resistance and / or fracture resistance of the coating film 3. Furthermore, it is easier to control the orientation of the cubic crystals 33 located on the side surface 12 including the flank region 14 so as to reduce the frictional resistance and / or frictional heat generated in the coating film 3 on the side surface 12 including the flank region 14 during cutting. Thus, it is easier to improve the machining accuracy of the coated tool 1 used to machine the workpiece.

[0066] As shown in Figure 4, the diffraction peak P(2,200) corresponding to the (200) plane of the crystal lattice of the cubic crystal 33 located on the side surface 12 in the X-ray diffraction pattern may include a first diffraction peak P1 and a second diffraction peak P2 that is distinguishable from the first diffraction peak P1. Here, "distinguishable" may refer, for example, to the case where the first diffraction peak P1 and the second diffraction peak P2 do not overlap, and each of the first diffraction peak P1 and the second diffraction peak P2 is a separate peak. The first diffraction peak P1 and the second diffraction peak P2 may partially overlap, as shown in Figure 4. For example, as shown in Figure 4, if there are three or more points (inflection points of diffraction peak P(2,200)) IP between the start and end points of diffraction peak P(2,200) where the second derivative of the intensity of diffraction peak P(2,200) with respect to the diffraction angle 2θ is zero, then diffraction peak P(2,200) may be determined to include the first diffraction peak P1 and the second diffraction peak P2.

[0067] In this case, the orientation of the cubic crystals 33 located on the side surface 12, including the flank region 14 (see Figure 1), is easily dispersed. Accordingly, the toughness of the coating film 3 on the side surface 12, including the flank region 14, is easily improved. As a result, the occurrence of cracks in the coating film 3 on the side surface 12, including the flank region 14, is easily reduced. Therefore, the wear resistance and / or fracture resistance of the coating film 3 is easily improved even under intermittent cutting conditions or conditions in which the coating film 3 is subjected to uneven loads.

[0068] As shown in Figure 4, the intensity I(P1) of the first diffraction peak P1 may be greater than the intensity I(P2) of the second diffraction peak P2, and the diffraction angle 2θ(P1) of the first diffraction peak P1 may be smaller than the diffraction angle 2θ(P2) of the second diffraction peak P2. Here, I(P1) and I(P2) may be the maximum intensity of the first diffraction peak P1 and the maximum intensity of the second diffraction peak P2, respectively. 2θ(P1) and 2θ(P2) may be the diffraction angle corresponding to the maximum intensity of the first diffraction peak P1 and the diffraction angle corresponding to the maximum intensity of the second diffraction peak P2, respectively. 2θ(P1) and 2θ(P2), in other words, the diffraction angles of diffraction peak P(2,200), may be, for example, 43° to 44° when using characteristic X-rays of CuKα with a wavelength of 0.15418 nm.

[0069] In this case, the moderate internal strain of the coating film 3 on the side surface 12, including the relief surface region 14, reduces the occurrence of peeling and / or cracking of the coating film 3. Accordingly, the durability of the coating tool 1 is easily improved.

[0070] <Method for manufacturing covered tools> Next, an example of a method for manufacturing a coated tool according to this embodiment will be described. The method for manufacturing a coated tool according to this embodiment is not limited to the method for manufacturing coated tool 1 described below.

[0071] The coating tool 1 is manufactured by forming a coating film 3 on a substrate 2. The coating film 3 may be formed, for example, by physical vapor deposition (PVD). For example, if the coating film 3 is formed using physical vapor deposition while the substrate 2 is held at the inner circumferential surface of the through hole 15, the coating film 3 can be formed to cover the entire surface of the substrate 2 except for the inner circumferential surface of the through hole 15.

[0072] Examples of physical vapor deposition methods include ion plating methods such as arc ion plating (AIP) and sputtering. Arc ion plating is a method of depositing a metal or metal nitride film by using an arc discharge in a vacuum atmosphere to evaporate the target metal and, if necessary, combining it with nitrogen (N2 gas).

[0073] For example, when forming a coating film 3 on a substrate 2 using the arc ion plating method, the coating tool 1 can be manufactured by the following method.

[0074] As an example, prepare target A, such as an Al, Ti, M, and B target, or a composite target, or a sintered target. Here, M is at least one metal selected from the elements of groups 4, 5, and 6 of the periodic table, excluding Ti.

[0075] Next, target A is evaporated and ionized by an arc discharge or glow discharge. The ionized Al, Ti, M, and B are reacted with nitrogen (N2) gas or the like, and deposited onto the surface of substrate 2. This allows for the formation of a second layer 32 (see Figure 3) on substrate 2.

[0076] As an example, prepare target B such as Cr, M, and B targets, or a composite target, or a sintered target. Here, M is at least one metal selected from the elements of groups 4, 5, and 6 of the periodic table, excluding Ti and Cr.

[0077] Next, target B is evaporated and ionized by an arc discharge or glow discharge. The ionized Cr, M, and B are reacted with nitrogen (N2) gas or the like, and deposited onto the surface of the second layer 32 formed on the substrate 2. This allows the first layer 31 (see Figure 3) to be formed on the second layer 32 formed on the substrate 2.

[0078] To carry out the arc ion plating method described above, for example, an arc ion plating deposition apparatus (hereinafter referred to as an AIP apparatus) can be used. Figure 5 is a schematic diagram showing an example of an AIP apparatus.

[0079] The AIP apparatus 1000 shown in Figure 5 introduces a gas such as N2 gas or argon (Ar) gas into a vacuum chamber 101 through a gas inlet 102, and applies a high voltage between the cathode electrode 103 and the anode electrode 104 located in the AIP apparatus 1000 to generate a gas plasma. This plasma evaporates and ionizes the desired metal or ceramic from the target 105, such as target A or target B as described above, generating high-energy ions of the metal or ceramic. The ionized metal or ceramic is then attached to the surface of the substrate 2, which serves as a sample, and the surface of the substrate 2 is coated with a coating film 3.

[0080] As shown in Figure 5, multiple base units 2 may be set on the tower 107 and placed on the sample support stand 106. Multiple (two sets in the figure) sample support stands 106 may be placed on a table not shown. As shown in Figure 5, a heater 108 for heating the base units 2, a gas outlet 109 for discharging gas to the outside of the system, and a bias power supply 110 for applying a bias voltage to the base units 2 are provided.

[0081] Using the target 105, for example, a metal source is evaporated by arc discharge or glow discharge to ionize the metal of the metal source, and at the same time, it is reacted with nitrogen (N₂) gas as a nitrogen source, methane (CH₄) / acetylene (C₂H₂) gas as a carbon source, or oxygen (O₂) gas, thereby depositing the coating film 3 on the surface of the substrate 2.

[0082] The sample support table 106 is controlled such that the distance (T-S distance) from the position of the target 105 to the position of the substrate 2 is 100 mm or more. A plasma with relatively low density is generated between the target 105 and the substrate 2, and the plasma density in the vicinity of the substrate 2 is set to 8.0×10 11 pieces / m 3 or less.

[0083] The distance between the cathode electrodes 103 in the vertical direction is set to 80 mm or less. For example, the distance between the cathode electrodes 103 in the vertical direction may be set to 50 mm or less.

[0084] Nitrogen gas is introduced into the AIP apparatus 1000 as a reaction gas, and the pressure of the atmosphere inside the vacuum chamber 101 is set to 2 to 10 Pa. The temperature of the substrate 2 is maintained at 400 to 600°C. Further, a bias voltage of -50 to -200 V is applied to the substrate 2, and an arc discharge with a current value of 100 to 200 A is generated between the target 105 or the cathode electrode 103 and the anode electrode 104. The substrate 2 is caused to rotate and revolve, and metal is vapor-deposited on the substrate 2.

[0085] Factors for controlling the plasma density in the vicinity of the substrate 2 include, for example, the temperature of the substrate 2, the gas pressure of nitrogen gas or the like, the distance between the target 105 and the substrate 2, the bias voltage applied to the substrate 2, the magnetic field directed toward the target 105, the distance between the cathode electrodes 103, the magnetic flux density of the magnet, and the like. The plasma density can be controlled by adjusting these factors in a composite manner.

[0086] This allows for adjustment of the X-ray diffraction pattern of the coating film 3 on its upper surface 11 and on its side surface 12. In other words, when forming the coating film 3 on the surface of the substrate 2, a difference can be created between the X-ray diffraction pattern of the coating film 3 on its upper surface 11 and on its side surface 12.

[0087] Plasma density (particles / m³) 3 This is calculated, for example, by measuring the position of the substrate 2 using a Langmuir probe LPM (manufactured by Arios Corporation). Here, the distance from the position of the target 105 to the position of the substrate 2 is represented by the distance measured at the position where the substrate 2 is closest to the target 105.

[0088] When forming the coating film 3 on the surface of the substrate 2, the tower 107 may rotate while each of the sample support stands 106 on which the substrate 2 is placed rotates, and the table may be rotated so that multiple sample support stands 106 revolve around each other.

[0089] The angle between the two cathode electrodes 103 in the horizontal direction with respect to the orbital axis, which is the center of the AIP device 1000, may be adjusted. Figures 6A, 6B, and 6C schematically show examples of the angle between the two cathode electrodes in the horizontal direction with respect to the orbital axis in the AIP device, respectively.

[0090] As shown in Figure 6A, when the two cathode electrodes 103 are positioned so that they face each other, the angle between the two cathode electrodes 103 with respect to the orbital axis AX in the AIP device 1000 is 180°.

[0091] As shown in Figure 6B, the X-ray diffraction pattern of the coating film 3 on the upper surface 11 and the X-ray diffraction pattern of the coating film 3 on the side surface 12 of the coating film 3 can also be adjusted by positioning the two cathode electrodes 103 such that the angle between the two cathode electrodes 103 with respect to the orbital axis AX in the AIP apparatus 1000 is 120°.

[0092] As shown in Figure 6C, the X-ray diffraction pattern of the coating film 3 on the upper surface 11 and the X-ray diffraction pattern of the coating film 3 on the side surface 12 of the coating film 3 can also be adjusted by positioning the two cathode electrodes 103 such that the angle between the two cathode electrodes 103 with respect to the orbital axis AX in the AIP apparatus 1000 is 60°.

[0093] Furthermore, by adjusting the respective thicknesses and / or deposition conditions of the first layer 31 and the second layer 32, a difference can be made between the intensity of the first diffraction peak P1 and the intensity of the second diffraction peak P2 at diffraction peak P(2,200), which corresponds to the (200) plane of the crystal lattice of the cubic crystal 33 located on the side surface 12.

[0094] <Cutting tools> Next, an example of a cutting tool according to the embodiment will be described with reference to Figure 7. Figure 7 is a front view showing an example of a cutting tool according to the embodiment. The cutting tool is used for cutting a workpiece. This produces a cut product. Examples of cutting processes include turning and milling.

[0095] As shown in Figure 7, the cutting tool 100 according to this embodiment comprises the coating tool 1 described above and a holder 70 for fixing the coating tool 1.

[0096] The holder 70 is a rod-shaped member extending from the first end (upper end in Figure 7) to the second end (lower end in Figure 7). The holder 70 is made of, for example, steel or cast iron. Among these materials, steel with high toughness may be used.

[0097] The holder 70 has a pocket 73 located at the end on the first end side. The pocket 73 is the part into which the coated tool 1 is mounted and has a seating surface that intersects with the rotational direction of the workpiece and a restraining side surface that is inclined with respect to the seating surface. The seating surface is provided with a screw hole into which a screw 75 is screwed.

[0098] The coating tool 1 is located in the pocket 73 of the holder 70 and is attached to the holder 70 by a screw 75. Specifically, the screw 75 is inserted into the through hole 21 of the coating tool 1, and the tip of the screw 75 is inserted into the screw hole formed in the seating surface of the pocket 73, and the screwed parts are screwed together. In this way, the coating tool 1 is attached to the holder 70 such that the cutting edge protrudes outward from the holder 70.

[0099] In this embodiment, a cutting tool 100 used for so-called turning operations is illustrated. Examples of turning operations include internal diameter machining, external diameter machining, grooving, and parting. The cutting tool is not limited to those used for turning operations. For example, a coated tool 1 may be used as a cutting tool for milling operations. Examples of cutting tools used for milling operations include milling cutters such as flat milling cutters, face milling cutters, side milling cutters, or groove milling cutters, and end mills such as single-flute end mills, multi-flute end mills, tapered end mills, or ball end mills.

[0100] Turning is performed using a lathe. Turning comprises the steps of rotating the workpiece, bringing a fixed cutting tool 100 into contact with the rotating workpiece to remove material from its surface, and removing the cutting tool 100 from the workpiece. By machining the workpiece into a desired rotationally symmetrical shape in this way, it becomes easier to manufacture a rotationally symmetrical workpiece. Milling is performed using a milling machine. Milling comprises the steps of rotating the cutting tool 100, bringing the fixed workpiece into contact with the rotating cutting tool 100 to remove material from the fixed workpiece, and removing the cutting tool 100 from the workpiece. By machining the workpiece into a desired shape in this way, it becomes easier to manufacture a workpiece.

[0101] <Method for manufacturing machined parts> Next, a method for manufacturing a machined workpiece according to an embodiment will be described with reference to Figures 8A, 8B, and 8C. Figures 8A, 8B, and 8C are schematic diagrams showing one step of the method for manufacturing a machined workpiece according to an embodiment.

[0102] The machined workpiece 200 is produced by machining the workpiece 201. Figures 8A, 8B, and 8C illustrate turning using a lathe as an example of machining. The method for manufacturing the machined workpiece 200 in this embodiment is as follows: The process of rotating the workpiece 201 (process A), Step B involves bringing the workpiece 201 and the cutting tool 100 into contact, Step C involves moving the cutting tool 100 relatively away from the workpiece 201, It is equipped with.

[0103] More specifically, first, as shown in Figure 8A, the workpiece 201 is rotated around the axis O1, and the cutting tool 100 is brought relatively close to the workpiece 201. Next, as shown in Figure 8B, the cutting edge of the coated tool 1 is brought into contact with the workpiece 201 to cut the workpiece 201. Then, as shown in Figure 8C, the cutting tool 100 is moved relatively away from the workpiece 201.

[0104] In Figure 8A, the cutting tool 100 is moved closer to the workpiece 201 by moving it in the Y1 direction while the shaft O1 is fixed and the workpiece 201 is rotating. In Figure 8B, the workpiece 201 is cut by bringing the cutting edge of the coated tool 1 into contact with the rotating workpiece 201. In Figure 8C, the cutting tool 100 is moved away from the workpiece 201 by moving it in the Y2 direction while the workpiece 201 is rotating.

[0105] In the cutting process of the manufacturing method for a machined workpiece according to this embodiment, the cutting tool 100 is moved in each step to bring the cutting tool 100 into contact with the workpiece 201 or to move the cutting tool 100 away from the workpiece 201. However, the manufacturing method for a machined workpiece is, of course, not limited to this form.

[0106] For example, in step A, the workpiece 201 may be brought closer to the cutting tool 100. Similarly, in step C, the workpiece 201 may be moved away from the cutting tool 100. If the cutting process is to continue, the process of maintaining the rotation of the workpiece 201 and bringing the cutting edge of the cutting tool 100 into contact with different parts of the workpiece 201 can be repeated.

[0107] When milling is performed instead of turning, in step A, the cutting tool may be rotated around the rotation axis. Furthermore, in step B, the workpiece 201 may be cut by bringing the cutting edge of the rotating coated tool 1 into contact with the workpiece 201. Furthermore, in step C, the cutting tool may be moved away from the workpiece 201. Milling may also be performed using a milling machine.

[0108] Typical examples of materials for the workpiece 201 include carbon steel, alloy steel, stainless steel, cast iron, or non-ferrous metals. [Examples]

[0109] The embodiments of this disclosure will be described below in detail. This disclosure is not limited to the embodiments shown below.

[0110] Using an AIP apparatus as shown in Figure 5, coated tools according to Examples 1 to 11 and Comparative Examples 1 and 2 were fabricated by forming a coating film on a substrate made of WC-based cemented carbide according to the arc ion plating method described above.

[0111] Figure 9 shows the conditions for forming the coating film for the coating tools of Examples 1 to 11 and the coating tools of Comparative Examples 1 and 2. Specifically, Figure 9 shows the presence or absence of the first layer, the composition of target B for forming the second layer, the deposition gas pressure (Pa), and the plasma density (x10) for each of the coating tools of Examples 1 to 11 and the coating tools of Comparative Examples 1 and 2. 11 pieces / m 3), the distance between the target and the substrate (T-S distance) (mm), the distance between the cathode electrodes in the vertical direction (mm), and the angle (°) between the two cathode electrodes with respect to the revolution axis are shown. Target A for forming the first layer was a Cr alloy containing 1 to 20 atomic % of B. By reacting ions generated from target A with nitrogen gas, the first layer which is a CrBN layer was formed. By reacting ions generated from target B with nitrogen gas, the second layer which is a nitride containing elements corresponding to the composition of target B was formed.

[0112] Next, the X-ray diffraction patterns of the coating film in each of the coated tools according to Examples 1 to 11 and the coated tools according to Comparative Examples 1 and 2 were obtained by using an X-ray analyzer D8 DISCOVER (manufactured by Bruker). FIG. 10 is a diagram showing information on the X-ray diffraction patterns of the coating films in each of the coated tools according to Examples 1 to 11 and the coated tools according to Comparative Examples 1 and 2. Specifically, FIG. 10 shows I(1,200) / I(1,220), I(2,200) / I(2,220), (I(1,200) / I(1,220)) / (I(2,200) / I(2,220)), I(1,220) / I(2,220), I(1,220) / (I(1,220)+I(1,200)+I(1,111)+I(1,110)), I(2,111) / I(1,111), presence or absence of separation of P1 and P2 at P(2,200), and P1 intensity / P2 intensity for the X-ray diffraction patterns of the coating films in each of the coated tools according to Examples 1 to 11 and the coated tools according to Comparative Examples 1 and 2. Here, P1 and P2 satisfied the relationship of 2θ(P1) < 2θ(P2).

[0113] As shown in FIG. 10, it was confirmed that each of the coated tools according to Examples 1 to 11 satisfies the relationship of I(1,200) / I(1,220) < I(2,200) / I(2,220). On the other hand, it was confirmed that each of the coated tools according to Comparative Examples 1 and 2 does not satisfy the relationship of I(1,200) / I(1,220) < I(2,200) / I(2,220).

[0114] As shown in Figure 10, it was confirmed that each of the coating tools according to Examples 1 to 7 satisfies the relationship (I(1,200) / I(1,220)) / (I(2,200) / I(2,220)) < 0.5. On the other hand, it was confirmed that each of the coating tools according to Examples 8 to 11 does not satisfy the relationship (I(1,200) / I(1,220)) / (I(2,200) / I(2,220)) < 0.5.

[0115] As shown in Figure 10, it was confirmed that each of the coating tools according to Examples 1 to 3 satisfies the relationship I(1,220) / I(2,220)>1.0. On the other hand, it was confirmed that each of the coating tools according to Examples 4 to 11 does not satisfy the relationship I(1,220) / I(2,220)>1.0.

[0116] As shown in Figure 10, it was confirmed that each of the coating tools according to Examples 1 and 2 satisfies the relationship I(1,220) / (I(1,220)+I(1,200)+I(1,111)+I(1,110))>0.3. On the other hand, it was confirmed that each of the coating tools according to Examples 3 to 11 does not satisfy the relationship II(1,220) / (I(1,220)+I(1,200)+I(1,111)+I(1,110))>0.3.

[0117] As shown in Figure 10, it was confirmed that the coating tool according to Example 1 satisfies the relationship between the strength of P1 > the strength of P2 and 2θ(P1) < 2θ(P2). On the other hand, it was confirmed that each of the coating tools according to Examples 2 to 11 does not satisfy the relationship between the strength of P1 > the strength of P2 and 2θ(P1) < 2θ(P2).

[0118] Next, cutting tests were performed on the coated tools according to Examples 1 to 11 and the coated tools according to Comparative Examples 1 and 2. The conditions for the cutting tests were as follows.

[0119] • Conditions for the cutting test Cutting conditions: High-feed cutter Work material: Ti-6Al-4V Cutting speed Vc: 65m / min Feed rate f: 0.4mm / tooth Cutting depth: 20mm Cutting depth ae: 0.4mm Cutting method: Wet Tool used: LOGU030310ER-GM Evaluation criteria: Cutting time (minutes) when the wear amount on the flank surface exceeds 0.2 mm.

[0120] For each of the coated tools according to Examples 1 to 11 and Comparative Examples 1 and 2, the cutting time (minutes) was measured when the wear on the flank surface exceeded 0.2 mm. Figure 11 shows the results of the cutting test for the coated tools according to Examples 1 to 11 and Comparative Examples 1 and 2. Specifically, Figure 11 shows the cutting time (minutes) when the wear on the flank surface exceeded 0.2 mm for each of the coated tools according to Examples 1 to 11 and Comparative Examples 1 and 2.

[0121] As shown in Figure 11, it was confirmed that the cutting time at which the wear amount of the flank surface of each of the coated tools according to Examples 1 to 11 exceeded 0.2 mm was longer than the cutting time at which the wear amount of the flank surface of each of the coated tools according to Comparative Examples 1 and 2 exceeded 0.2 mm. In other words, it was confirmed that the durability of each of the coated tools according to Examples 1 to 11 is higher than the durability of each of the coated tools according to Comparative Examples 1 and 2.

[0122] As shown in Figure 11, it was confirmed that the cutting time at which the wear amount of the flank surface of each of the coated tools according to Examples 1 to 7 exceeded 0.2 mm was longer than the cutting time at which the wear amount of the flank surface of each of the coated tools according to Examples 8 to 11 exceeded 0.2 mm. In other words, it was confirmed that the durability of each of the coated tools according to Examples 1 to 7 was higher than the durability of each of the coated tools according to Examples 8 to 11.

[0123] As shown in Figure 11, it was confirmed that the cutting time at which the wear amount of the flank surface of each of the coated tools according to Examples 1 to 3 exceeded 0.2 mm was longer than the cutting time at which the wear amount of the flank surface of each of the coated tools according to Examples 4 to 11 exceeded 0.2 mm. In other words, it was confirmed that the durability of each of the coated tools according to Examples 1 to 3 was higher than the durability of each of the coated tools according to Examples 4 to 11.

[0124] As shown in Figure 11, it was confirmed that the cutting time at which the wear on the flank surface of each of the coated tools according to Examples 1 and 2 exceeded 0.2 mm was longer than the cutting time at which the wear on the flank surface of each of the coated tools according to Examples 3 to 11 exceeded 0.2 mm. In other words, it was confirmed that the durability of each of the coated tools according to Examples 1 and 2 was higher than the durability of each of the coated tools according to Examples 3 to 11.

[0125] As shown in Figure 11, it was confirmed that the cutting time at which the wear on the flank surface of the coated tool according to Example 1 exceeded 0.2 mm was longer than the cutting time at which the wear on the flank surface of each of the coated tools according to Examples 2 to 11 exceeded 0.2 mm. In other words, it was confirmed that the durability of the coated tool according to Example 1 is higher than the durability of each of the coated tools according to Examples 2 to 11.

[0126] This technology can take the following configuration. (1) Substrate and, A coating film located on the surface of the substrate and Equipped with, The coating film has a first surface including a scooping surface region and a second surface adjacent to the first surface and including a relief surface region. The coating film includes cubic crystals located on the first plane and cubic crystals located on the second plane. The intensity I(1,200) of the diffraction peak corresponding to the (200) plane of the crystal lattice of the cubic crystal located on the first plane in the X-ray diffraction pattern, the intensity I(2,200) of the diffraction peak corresponding to the (200) plane of the crystal lattice of the cubic crystal located on the second plane in the X-ray diffraction pattern, the intensity I(1,220) of the diffraction peak corresponding to the (220) plane of the crystal lattice of the cubic crystal located on the first plane in the X-ray diffraction pattern, and the intensity I(2,220) of the diffraction peak corresponding to the (220) plane of the crystal lattice of the cubic crystal located on the second plane in the X-ray diffraction pattern are: I(1,200) / I(1,220) <I(2,200) / I(2,220) Satisfying the relationship, Covering tools. (2) I(1,200), I(2,200), I(1,220), and I(2,220) are, (I(1,200) / I(1,220)) / (I(2,200) / I(2,220))<0.5 The covering tool described in (1) above, which satisfies the relationship. (3) I(1,220) and I(2,220) are, I(1,220) / I(2,220)>1.0 Satisfying the relationship, The covering tool described in (1) or (2) above. (4) The coating film further comprises hexagonal crystals located on the first surface, I(1,200), I(1,220), the intensity of the diffraction peak corresponding to the (111) plane of the crystal lattice of the cubic crystal located on the first plane in the X-ray diffraction pattern, and the intensity of the diffraction peak corresponding to the (110) plane of the crystal lattice of the hexagonal crystal located on the first plane in the X-ray diffraction pattern, are I(1,220) / (I(1,220)+I(1,200)+I(1,111)+I(1,110))>0.3 Satisfying the relationship, A covering tool as described in any one of (1) to (3) above. (5) The intensity I(1,111) of the diffraction peak corresponding to the (111) plane of the crystal lattice of the cubic crystal located on the first plane in the X-ray diffraction pattern and the intensity I(2,111) of the diffraction peak corresponding to the (111) plane of the crystal lattice of the cubic crystal located on the second plane in the X-ray diffraction pattern are: I(2,111) / I(1,111)>3 Satisfying the relationship, A covering tool as described in any one of (1) to (4) above. (6) The diffraction peak corresponding to the (200) plane of the crystal lattice of the cubic crystal located on the second plane in the X-ray diffraction pattern includes a first diffraction peak and a second diffraction peak distinguishable from the first diffraction peak. A covering tool as described in any one of (1) to (5) above. (7) The intensity of the first diffraction peak is greater than the intensity of the second diffraction peak. The diffraction angle of the first diffraction peak is smaller than the diffraction angle of the second diffraction peak. The covering tool described in (6) above. (8) The coating film includes a first layer containing at least one first metallic element, which is selected from the group consisting of elements from groups 4, 5, and 6 of the periodic table, excluding titanium, and nitrogen. A covering tool as described in any one of (1) to (7) above. (9) The at least one first metallic element includes chromium, The covering tool described in (8) above. (10) The chromium content in the at least one first metallic element is 80 atomic percent or more. The covering tool described in (9) above. (11) The first layer further contains boron, A covering tool as described in any one of (8) to (10) above. (12) The coating film further includes a second layer located closer to the substrate than the first layer, The second layer contains at least one secondary metallic element, which includes at least one element selected from the group consisting of elements from groups 4, 5, and 6 of the periodic table, and nitrogen. A covering tool as described in any one of (8) to (11) above. (13) The at least one second metallic element includes aluminum and titanium. The aluminum content in the at least one second metallic element is higher than the titanium content in the at least one second metallic element. The covering tool described in (12) above. (14) The aluminum content in the at least one second metallic element is 50 atomic percent or more. The titanium content in the at least one second metallic element is 30 atomic percent or more. The covering tool described in (13) above. (15) The second layer further contains boron, A covering tool as described in any one of (12) to (14) above. (16) A rod-shaped holder having a pocket at the end, A covering tool located within the pocket, and one of the items (1) to (15) described above. Equipped with, cutting tools. (17) A step of rotating the workpiece or the cutting tool described in (16) above, A step of bringing the workpiece and the cutting tool into contact, A step of moving the cutting tool relatively away from the workpiece. Equipped with, A method for manufacturing machined parts.

[0127] Further effects and / or modifications can be readily derived by those skilled in the art. Therefore, broader aspects of the present invention are not limited to the specific details and representative embodiments expressed and described above. Accordingly, various modifications are possible without departing from the spirit or scope of the overall concept of the invention as defined by the appended claims and their equivalents. [Explanation of Symbols]

[0128] 1. Covering Tools 11 Top side 12 Side view 13. Area of ​​the rake face 14. The area of ​​escape 15 Through holes 2 Base 3 Coating film 31 1st layer 32 2nd layer 33. Cubic crystals 34 Hexagonal crystals 70 Holder 73 pockets 75 screws 100 cutting tools 101 Vacuum Chamber 102 Gas inlet 103 Cathode electrode 104 Anode electrode 105 Target 106 Sample support stand 107 Tower 108 Heater 109 Gas outlet 110 Bias Power Supply 200 Cutting workpiece 201 Work material 1000 AIP devices AX (Axis of Revolution) IP inflection point O1 axis

Claims

1. Substrate and, A coating film located on the surface of the substrate and Equipped with, The coating film has a first surface including a scooping surface region and a second surface adjacent to the first surface and including a relief surface region. The coating film includes cubic crystals located on the first plane and cubic crystals located on the second plane. The intensity I(1,200) of the diffraction peak corresponding to the (200) plane of the crystal lattice of the cubic crystal located on the first plane in the X-ray diffraction pattern, the intensity I(2,200) of the diffraction peak corresponding to the (200) plane of the crystal lattice of the cubic crystal located on the second plane in the X-ray diffraction pattern, the intensity I(1,220) of the diffraction peak corresponding to the (220) plane of the crystal lattice of the cubic crystal located on the first plane in the X-ray diffraction pattern, and the intensity I(2,220) of the diffraction peak corresponding to the (220) plane of the crystal lattice of the cubic crystal located on the second plane in the X-ray diffraction pattern are, I(1,200) / I(1,220)<I(2,200) / I(2,220) Satisfying the relationship, Covering tools.

2. I(1,200), I(2,200), I(1,220), and I(2,220) are, (I(1,200) / I(1,220)) / (I(2,200) / I(2,220))<0.5 Satisfying the relationship, The covering tool according to claim 1.

3. I(1,220) and I(2,220) are, I(1,220) / I(2,220)>1.0 Satisfying the relationship, The covering tool according to claim 1.

4. The coating film further comprises hexagonal crystals located on the first surface, I(1,200), I(1,220), the intensity of the diffraction peak corresponding to the (111) plane of the crystal lattice of the cubic crystal located on the first plane in the X-ray diffraction pattern, and the intensity of the diffraction peak corresponding to the (110) plane of the crystal lattice of the hexagonal crystal located on the first plane in the X-ray diffraction pattern, I(1,220) / (I(1,220)+I(1,200)+I(1,111)+I(1,110))>0.3 Satisfying the relationship, The covering tool according to claim 1.

5. The intensity I(1,111) of the diffraction peak corresponding to the (111) plane of the crystal lattice of the cubic crystal located on the first plane in the X-ray diffraction pattern and the intensity I(2,111) of the diffraction peak corresponding to the (111) plane of the crystal lattice of the cubic crystal located on the second plane in the X-ray diffraction pattern are, I(2,111) / I(1,111)>3 Satisfying the relationship, The covering tool according to claim 1.

6. The diffraction peak corresponding to the (200) plane of the crystal lattice of the cubic crystal located on the second plane in the X-ray diffraction pattern includes a first diffraction peak and a second diffraction peak distinguishable from the first diffraction peak. The covering tool according to claim 1.

7. The intensity of the first diffraction peak is greater than the intensity of the second diffraction peak. The diffraction angle of the first diffraction peak is smaller than the diffraction angle of the second diffraction peak. The covering tool according to claim 6.

8. The coating film includes a first layer containing at least one first metallic element, which is selected from the group consisting of elements from groups 4, 5, and 6 of the periodic table, excluding titanium, and nitrogen. The covering tool according to claim 1.

9. The at least one first metallic element includes chromium, The covering tool according to claim 8.

10. The chromium content in the at least one first metallic element is 80 atomic percent or more. The covering tool according to claim 9.

11. The first layer further contains boron, The covering tool according to claim 8.

12. The coating film further includes a second layer located closer to the substrate than the first layer, The second layer contains at least one secondary metallic element, which includes at least one element selected from the group consisting of elements from groups 4, 5, and 6 of the periodic table, and nitrogen. The covering tool according to claim 8.

13. The at least one second metallic element includes aluminum and titanium. The aluminum content in the at least one second metal element is higher than the titanium content in the at least one second metal element. The covering tool according to claim 12.

14. The aluminum content in the at least one second metallic element is 50 atomic percent or more. The titanium content in the at least one second metallic element is 30 atomic percent or more. The covering tool according to claim 13.

15. The second layer further contains boron, The covering tool according to claim 12.

16. A rod-shaped holder having a pocket at the end, A covering tool according to any one of claims 1 to 15, located within the aforementioned pocket Equipped with, cutting tools.

17. A step of rotating the workpiece or the cutting tool described in claim 16, A step of bringing the workpiece and the cutting tool into contact, A step of moving the cutting tool relatively away from the workpiece. Equipped with, A method for manufacturing machined parts.

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