• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    COATED CUTTING TOOL. The present invention relates to a coated cutting tool provided with a substrate and a coating layer formed on the outer surface of the substrate in order to obtain a coated cutting tool that has superior resistance to chipping, wear and damage while having a long useful life, where: the coating layer includes at least one layer of Ti compound, the layer of Ti compound comprising a compound containing elemental titanium and at least one element selected from the group consisting of C, N, O and B; a region surrounded by cracks is provided in the Ti compound layer when a grinding surface substantially parallel to the substrate surface is seen from above; the region is internally provided with intermittent cracks in which one end or both ends are not in contiguity with the cracks that constitute the region; and the average number density (A) of the region and the average number density (B) of the cracks satisfy the 0.7A2 ratio.
    公开号:BR112016002973B1
    申请号:R112016002973-9
    申请日:2014-08-21
    公开日:2020-11-17
    发明作者:Hiroyuki Satoh
    申请人:Tungaloy Corporation；
    IPC主号:
    专利说明:

    TECHNICAL FIELD
    [001] The present invention relates to a coated cutting tool. BACKGROUND OF THE TECHNIQUE
    [002] It is conventionally known to use a coated cutting tool in which a coating layer, which includes a single layer of one member or multiple layers of two or more members of, for example, a carbide, a nitride, a carbonitride, a carboxide, and a carboxinitride of Ti, and aluminum oxide, with a total film thickness of 3 to 20 pm is formed on a surface of a substrate made of cemented carbide by deposition of chemical vapor, for cutting steel, cast iron, and the like.
    [003] When a coating film is formed on a cemented carbide surface based on tungsten carbide, the tensile stress remains on the coating film and therefore coated cutting tools are generally considered to have resistance to breakage. reduced and prone to rupture. It was proposed to release residual traction stress by generating cracks with, for example, shot blast after the formation of a coating film and the proposal was quite effective (for example, see Patent Literature 1).
    [004] In addition, a cutting tool that has high density cracks in a coating film in a lower portion on one side of substrate and has low density cracks in the coating film in an upper portion on a surface side, is known (for example, see Patent Literature 2). PREVIOUS TECHNICAL DOCUMENT PATENT LITERATURE
    [005] Patent Literature 1: Jp H05-116003 A
    [006] Patent Literature 2: Jp H06-246512 A DESCRIPTION OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION
    [007] In the cutting process in recent years, greater speed, greater feeding and greater cutting have become noticeable and tool life has tended to be reduced more than conventional ones. Because of this background, when cracks simply increase in the coating film, the fracture resistance of the tool, as revealed, in Patent Literature 1 is improved. However, the tool, as disclosed, in Patent Literature 1 has a problem of reduced separation strength, chipping resistance, and wear resistance of the crack coating film. The tool disclosed in Patent Literature 2 has improved wear resistance in the upper portion while it has an insufficient wear resistance problem in the lower portion. In addition to this, there is an additional problem of possible separation in the coating film of the high density cracks in the lower portion. The present invention was made to solve these problems, and an objective of the present invention is to provide a coated cutting tool that has excellent chipping resistance, wear resistance, and fracture resistance and has long tool life by improving the way it works. crack generation in the coated cutting tool. MEANS TO SOLVE Q PROBLEM
    [008] From the above perspective, the present inventor carried out intense research on the tool life span of coated cutting tools and found that, with the configuration below, it is possible to improve fracture resistance without giving resistance to chipping and wear resistance, and as a result, it is possible to extend tool life.
    [009] The summary of the present invention is as follows.
    [0010] (1) A coated cutting tool includes: a substrate; and a coating layer formed on a substrate surface, where
    [0011] the coating layer includes at least one layer of a layer of Ti compound,
    [0012] The Ti compound layer is a compound that contains an element of Ti and at least one element selected from the group consisting of C, N, O and B,
    [0013] the Ti compound layer has a region surrounded by cracks when a polished surface approximately parallel to the substrate surface in the Ti compound layer is seen from an upper surface,
    [0014] within the region there is an intermittent crack, one end or both ends of the intermittent crack not coming into contact with the cracks that constitute the region, and
    [0015] the relationship between a density of average number A in the region and a density of average number B of the intermittent crack satisfies 0.7 <B / A <2.
    [0016] (2) The coated cutting tool according to (1), in which the Ti compound layer is formed on the substrate surface and has an average layer thickness of 2 to 20 pm.
    [0017] (3) The coated cutting tool according to any one of (1) or (2), in which the coating layer has an aluminum oxide layer with an average layer thickness of 1 to 15 pm in a surface of the Ti compound layer.
    [0018] (4) The coated cutting tool according to any one of (1) to (3), wherein the Ti compound layer is a compound that additionally contains at least one element selected from the group consisting of in Zr, Hf, V, Nb, Ta, Cr, Mo, W, Al and Si.
    [0019] (5) The coated cutting tool according to any one of (1) to (4), in which the aluminum oxide layer is a compound that additionally contains at least one element selected from the group consisting of in Zr, Hf, V, Nb, Ta, Cr, Mo, WeSi.
    [0020] (6) The coated cutting tool according to any one of (1) to (5), wherein the coating layer includes an outer layer made of at least one element selected from the group consisting of Zr, Hf, V, Nb, Ta, Cr, Mo, W and Si and at least one member selected from the group consisting of C, N, O and B on a surface of the aluminum oxide layer.
    [0021] (7) The coated cutting tool according to any one of (1) to (6), wherein the entire coating layer has a total layer thickness of 3 to 30 pm as a medium layer thickness.
    [0022] (8) The coated cutting tool according to any one of (1) to (7), where the substrate is any one of cemented carbide, cermet, ceramic or sintered cubic boron nitride. Coated Cutting Tool
    [0023] The coated cutting tool of the present invention includes a substrate and a coating layer formed on a surface of the substrate. Specifically, examples of a type of coated cutting tool may include indexable cutting inserts for milling or turning, drills and endmills. Substrate
    [0024] Examples of the substrate of the present invention may include, for example, cemented carbide, cermet, ceramics, sintered cubic boron nitride, sintered diamond and high speed steel. Among them, the substrate is even more preferably any of cemented carbide, cermet, ceramic or sintered cubic boron nitride for excellent wear resistance and fracture resistance.
    [0025] Such substrate may have a modified surface. The effects of the present invention are exhibited even when the surface is modified in such a way that, for example, a β-free layer is formed on the surface for cemented carbide and a surface-hardened layer can be formed for cermet. Coating Layer
    [0026] The entire coating layer of the present invention preferably has a total layer thickness of 3 to 30 µm as a medium layer thickness. Wear resistance can be weak in the case of less than 3 pm, and substrate adhesion and fracture resistance can be reduced in the case of more than 30 pm. In the range of 3 to 20 pm it is even more preferred. Ti Compound Layer
    [0027] The coating layer of the present invention includes at least one layer of a Ti compound layer. The Ti compound layer means a compound layer that contains an element of Ti as an essential component and that additionally contains at least an element selected from the group consisting of C, N, O and B. The Ti compound layer may contain at least one element selected from the group consisting of Zr, Hf, V, Nb, Ta, Cr, Mo, W, Al and Si as an optional component.
    [0028] The Ti compound layer of the present invention is preferably formed on the surface of the substrate due to the fact that the adhesion between the substrate and the coating layer is improved. The Ti compound layer of the present invention has an average layer thickness preferably from 2 to 20 µm. This is due to the fact that wear resistance tends to be reduced when the Ti compound layer has an average layer thickness of less than 2 pm while fracture resistance tends to be reduced when the Ti compound layer has an average layer thickness of more than 20 pm.
    [0029] In the Ti compound layer of the present invention, when a polished surface approximately parallel to the substrate surface is seen from an upper surface, the Ti compound layer has a region surrounded by cracks and within the region has an intermittent crack , with one end or both ends of the intermittent crack not coming into contact with the cracks that make up the region. Here, "view from a top surface" means viewing the polished surface from the approximately normal direction of the surface. In other words, this means viewing from the front surface side of the coating layer, although it does not exist due to the fact that it is polished, that is, viewing from the opposite side of the substrate. Additionally, the relationship between a density of average number A in the region and a density of average number B of the intermittent crack satisfies 0.7 <B / A <2, thus obtaining an effect of interrupting cracks generated in the coating layer during cutting by intermittent cracking, so that chipping resistance and fracture resistance are excellent. In addition, particles in the coating layer that fall off during cutting are suppressed to a minimum by having the crack intermittent, and thus it is possible to maintain wear resistance. When the B / A ratio between the average number density A of the region and the average number density B of the intermittent crack is 0.7 or less, the distribution of the intermittent crack is insufficient, and thus it is not possible to obtain the effect to stop the development of cracks generated in the coating layer during cutting by the intermittent crack, so that chipping resistance and fracture resistance are reduced. On the other hand, when the B / A ratio between the average number density A of the region and the average number density B of the intermittent crack is 2 or more, the intermittent crack is distributed at many points, so that the cracks that constitute the region and the intermittent crack is easily connected and the fracture resistance is reduced.
    [0030] The polished surface of the Ti compound layer is a surface of the Ti compound layer that is obtained by polishing the coated cutting tool approximately parallel to the substrate surface until the Ti compound layer is exposed. At this point, it is preferable to obtain the polished surface at a position of a layer thickness of 50% or more of the average layer thickness of the Ti compound layer. For the coated cutting tool formed with layers of Ti compound of a plurality For compositions, it is preferable to measure a region of a layer of the composition with the greatest thickness of the middle layer and the intermittent crack.
    [0031] The region observed on the polished surface of the Ti compound layer of the present invention is an area surrounded by cracks generated in the coating layer during cooling after the coating layer is formed and cracks produced in the coating layer by processing, such as dry blasting and shot blasting. The number of regions is defined in such a way that the smallest area surrounded by the cracks is a region. When there is an even smaller region in one region, they are defined as two regions.
    [0032] It is possible to obtain the average number density of the region of the present invention by the method below. The number of regions observed on the polished surface of the Ti compound layer is measured. It is possible to obtain the density of number of regions by dividing the number of regions by the area of the measured Ti compound layer. It is possible to obtain the average number density by dividing the number density by the number of measured fields of view.
    [0033] The intermittent crack of the present invention is a crack that has one end or both ends of the crack that do not come into contact with the cracks that constitute the region. Examples of the intermittent cracking mode may include, for example, a way of not coming into contact with any crack in the region and a way of developing cracks from the cracks that constitute the region facing inwardly while development is stopped without crossing the region.
    [0034] It is possible to obtain the average number density of the intermittent crack of the present invention by the following method. The number of intermittent crack segments observed on the polished surface of the Ti compound layer is measured. It is possible to obtain the intermittent crack number density by dividing the number of intermittent crack segments by the measured Ti compound layer area. It is possible to obtain the average number density by adding each number density of the measured fields of view and dividing the total number densities by the number of measured fields of view.
    [0035] The coating layer of the present invention preferably includes an aluminum oxide layer (hereinafter, an AI2O3 layer) on the surface of the Ti compound layer due to the fact that it is possible to suppress the wear progress due to the reaction with 0 workpiece material. The crystal system of the AI2O3 layer is not particularly limited, and examples of it may include α shape, β shape, δ shape, y shape, K shape, X shape, X shape, of pseudo-z, the form of η and the form of p. Among them, the crystal system of the AI2O3 layer preferably has the form of α which is stable at high temperatures or the form of K which is excellent in adhesion between the Ti compound layer and the AI2O3 layer. Particularly in the case where the region involved in cutting increases in temperature as in high speed cutting, the AI2O3 layer is not easily fractured or chipped when using a 01-AI2O3 layer. The AI2O3 layer preferably has an average layer thickness of 1 to 15 pm. The resistance to crater wear on the back face can be reduced when the layer of AI2O3 has an average layer thickness of less than 1 pm, and separation easily occurs and fracture resistance can be reduced when it has more than 15 pm.
    [0036] Here, Figure 1 illustrates an example of a photograph of a polished surface in the Ti compound layer of the present invention approximately parallel to the substrate surface seen from an upper surface, and Figure 2 illustrates an example of a photograph of a polished surface in a layer of conventional Ti compound approximately parallel to the substrate surface seen from a top surface. Coating Layer Formation Method
    [0037] Examples of a method of forming each layer that constitutes the coating layer on the coated cutting tool of the present invention may include, for example, the method to be followed.
    [0038] For example, it is possible to form a layer of TiN by chemical vapor deposition in which the raw material gas composition is TiCk: from 5.0 to 10.0 mol%, N2: from 20 to 60% in mol, and H2: residual, temperature: 850 to 920 ° C and pressure: 100 to 350 hPa.
    [0039] It is possible to form a TiCN layer by chemical vapor deposition in which the raw material gas composition is TiCk: from 10 to 15 mol%, CH3CN: from 1 to 3 mol%, N2: from 0 20 mol%, and H2: residual, temperature: 850 to 920 ° C and pressure: 60 to 80 hPa.
    [0040] It is possible to form a TiC layer by chemical vapor deposition in which the raw material gas composition is TiCk: from 1.0 to 3.0 mol%, CFU: from 4.0 to 6.0 % in mol, and H2: residual, the temperature: from 990 to 1,030 ° C and the pressure: from 50 to 100 hPa.
    [0041] It is possible to form a layer of (X-AI2O3 by chemical vapor deposition in which the raw material gas composition is AICh: from 2.1 to 5.0 mol%, CO2: from 2.5 to 4.0 mol%, HCI: 2.0 to 3.0 mol%, H2S: 0.28 to 0.45 mol%, and H2: residual, temperature: 900 to 1000 ° C and the pressure: from 60 to 80 hPa.
    [0042] It is possible to form a layer of K-AI2O3 by chemical vapor deposition in which the raw material gas composition is AICh: from 2.1 to 5.0 mol%, CO2: from 3.0 to 6 , 0 mol%, CO: 3.0 to 5.5 mol%, HCI: 3.0 to 5.0 mol%, H2S: 0.3 to 0.5 mol%, and H2 : residual, temperature: 900 to 1,000 ° C and pressure: 60 to 80 hPa.
    [0043] It is possible to form a TiAICNO layer by chemical vapor deposition in which the raw material gas composition is TiCk: from 3.0 to 5.0 mol%, AICh: from 1.0 to 2.0 mol%, CO: from 0.4 to 1.0 mol%, N2: from 30 to 40 mol%, and H2: residual, the temperature: from 975 to 1.025 ° C and the pressure: from 90 to 110 hPa.
    [0044] It is possible to form a TiAICO layer by chemical vapor deposition in which the raw material gas composition is TiCk: from 0.5 to 1.5 mol%, AICh: from 3.0 to 5.0 mol%, CO: from 2.0 to 4.0 mol%, and H2: residual, the temperature: from 975 to 1.025 ° C and the pressure: from 60 to 100 hPa.
    [0045] It is possible to form a TiCNO layer by chemical vapor deposition in which the raw material gas composition is TiCk: from 3.0 to 5.0 mol%, CO: from 0.4 to 1.0 mol%, N2: from 30 to 40 mol%, and H2: residual, the temperature: from 975 to 1,025 ° C and the pressure: from 90 to 110 hPa.
    [0046] It is possible to form a TICO layer by chemical vapor deposition in which the raw material gas composition is TiCk: from 0.5 to 1.5 mol%, CO: from 2.0 to 4.0 % in mol, and H2: residual, the temperature: from 975 to 1,025 ° C and the pressure: from 60 to 100 hPa.
    [0047] The coated cutting tool which has an average number A density of the region and an average number B density of the intermittent crack that satisfies 0.7 <B / A <2 in the Ti compound layer is obtained, for example , by the method below.
    [0048] It is possible to easily control the average number density B of the intermittent crack in the Ti compound layer by dry blasting using projectiles that have a shape with a larger aspect ratio than conventional ones after the layer of coating is formed. The shape of the projectiles has even more preferably a sharp convex shape. Depending on dry blasting conditions, for example, projectiles can be projected at a projection speed of 80 to 100 m / sec for a projection time of 0.5 to 1 minute to have a projection angle to the layer surface. of coating from 30 to 90 °. Dry blasting projectiles are preferably a material, such as AI2O3 and ZrÜ2, which has an average particle diameter of 160 to 200 pm.
    [0049] It is possible to measure the layer thickness of each layer using an optical microscope, a scanning electron microscope (SEM), a field emission scanning electron microscope (FE-SEM), and the like. sectional structure of the coated cutting tool. The layer thickness of the coated cutting tool can be obtained by measuring the layer thickness of each layer at three or more points at positions close to 50 pm from the edge facing the back face of the coated cutting tool and obtaining an average of the themselves. It is possible to measure the composition of each layer with the use of a dispersive energy X-ray spectrometer (EDS), a dispersive wavelength X-ray spectrometer (WDS), and the like from the sectional structure of the coated cutting tool of the present invention.
    [0050] Examples of the method of measuring the region and intermittent crack in the Ti compound layer may include, for example, the following method. The coated cutting tool is polished in a direction approximately parallel to the substrate surface until the Ti compound layer is exposed to obtain a polished surface from the Ti compound layer. Cracks can easily be seen by etching the polished surface with fluonitric acid. The polished surface is observed in magnifications of 300 to 750 with the use of an optical microscope to take a photograph of the polished surface. Using polished surface photography, the number of regions and the number of intermittent crack segments in the Ti compound layer are measured. It is possible to obtain the number densities of the region and the intermittent crack by dividing the measured numbers of the regions and intermittent crack segments respectively by the measured area. It is possible to obtain the average number density A and the average number density B of the intermittent crack by adding the respective measured number densities of the region and the intermittent crack of each field of view and dividing them respectively by the measured number of fields of view. It is preferable to measure an area of 0.2 mm2 or more using the photograph of the polished surface. When the number of regions is measured using a photograph of the polished surface, an area where it is not possible to confirm the formation of a region due to the fact that a crack is in contiguity with one end of the photograph is defined as a region of 0.5. EFFECTS OF THE INVENTION
    [0051] The coated cutting tool of the present invention maintains wear resistance and is excellent at chipping resistance and fracture resistance, and thereby exhibits an effect of extending tool life more than conventional ones. BRIEF DESCRIPTION OF THE DRAWINGS
    [0052] Figure 1 is an example of a photograph of a polished surface approximately parallel to the substrate surface seen from an upper surface in a Ti compound layer of the present invention.
    [0053] Figure 2 is an example of a photograph of a polished surface approximately parallel to the substrate surface seen from an upper surface in a layer of conventional Ti compound. EXAMPLES
    [0054] The present invention is described below with reference to examples although the present invention is not limited thereto.
    [0055] As a substrate, a cutting insert made of cemented carbide that has a shape of CNMG120412 according to JIS and composition of 86.0WC-1.0TiCN-1.3TaC-0.2NbC-0.5ZrC-11, Co (previously, mass%) was prepared. After a substrate cutting edge crest was subjected to circular edging with a SiC brush, the substrate surface was washed. Then, the substrate was loaded into an external heating chemical vapor deposition apparatus, and a coating layer was formed on the surface substrate to have the coating layer configuration and the average layer thickness shown in Table 1. Ten samples were prepared for each. In Table 1, α in the crystal system of the aluminum oxide layer (AI2O3 layer) represents a 01-AI2O3 layer and K represents a K-AI2O3 layer.
    [0056] After the coating layer was formed, the samples obtained in this way were subjected to dry blasting. According to the dry blasting conditions of the Present Products 1 to 10, projectiles were projected at a projection speed of 90 m / s for a projection time of 0.5 to 1 minute to have a projection angle to the surface of the 45 ° coating. For dry blasting projectiles, AI2O3 with an average aspect ratio of 2 to 4 and an average particle diameter of 50 pm when measured at the positions of the smallest projectile diameter was used.
    [0057] Comparative Products 1 and 2 were not subjected to dry blasting or wet blasting.
    [0058] Comparative Product 3 was subjected to dry blasting using steel ball projectiles that have an average particle diameter of 150 pm. According to the conditions for dry blasting, the projectiles were projected at a projection speed of 120 m / sec. for a projection time of one minute to have a projection angle on the surface of the coating layer of 45 °.
    [0059] According to the dry blasting conditions of Comparative Products 4, 5, 7, and 8, projectiles were projected at a projection speed of 90 m / s for a projection time of 0.5 to 1 minute to have a projection angle to the surface of the coating layer of 45 °. For dry blasting projectiles, AI2O3 with an average particle diameter of 150 pm was used.
    [0060] Comparative Product 6 was subjected to wet blasting. Projectiles were projected at a projection speed of 120 m / s for a projection time of one minute to have a projection angle to the surface of the coating layer of 45 °. For wet blasting projectiles, AI2O3 with an average particle diameter of 30 pm was used.

    [0061] The layer thickness of each layer of the samples obtained in this way was obtained by measuring cross-sectional sections close to the 50 pm positions of the coated cutting tool edge towards the central portion of the abutment face at three points with a SEM and obtaining an average of them.
    [0062] To measure a region and an intermittent crack in the Ti compound layer, the samples obtained in this way were polished until the Ti compound layer was exposed in the direction approximately parallel to the substrate surface. The polished surface of the Ti compound layer was prepared to have a medium layer thickness at a position 70% of the layer thickness, and the polished surface of the Ti compound was etched with fluonitric acid. The polished surface of the Ti compound layer was observed at magnifications of 300 with the use of an optical microscope to take a photograph of the polished surface over an area of 0.33 mm2. Three inserts were prepared for each sample, the number of regions and the number of intermittent crack segments in the Ti compound layer were obtained using the respective photographs of the polished surface to obtain an average A density of the region and a density mean number B of the intermittent crack in the Ti compound layer from these values. Table 2 shows the average number density A of the region and the average number density B of the intermittent crack in the Ti compound layer. TABLE 2


    [0063] Using the samples obtained in this way, the First Cut Test and the Second Cut Test were performed. Processing distances to tool life are shown in Table 3. The First Cutting Test is a test to assess wear resistance and the Second Cutting Test is a test to assess fracture resistance. FIRST CUTTING TEST
    [0064] Workpiece material: S45C round bar,
    [0065] Cutting speed: 250 m / minute
    [0066] Feeding: 0.30 mm / rev,
    [0067] Cutting depth: 2.0 mm,
    [0068] Refrigerant: Used
    [0069] Assessment Point: The processing time to tool life was measured in which tool life was defined as the time when the sample was fractured or had a maximum flank wear width reaching 0.2 mm . SECOND CUT TEST
    [0070] Workpiece material: S45C round bar with two longitudinal grooves at equal intervals,
    [0071] Cutting speed: 200 m / minute
    [0072] Power: 0.40 mm / rev,
    [0073] Cutting depth: 1.5 mm
    [0074] Refrigerant: Used
    [0075] Assessment Point: The number of impacts up to the tool life was measured in which the tool life was defined as the time the sample was fractured. The number of impacts was defined as the number that the workpiece material came into contact with the sample, and the test was completed when the contact number reached a maximum of 20,000 times. Five inserts were prepared for each sample, and the respective number of impacts was measured to obtain an average of the values of these impact numbers to define how the tool life is.


    [0076] As shown in Table 3, it was found that wear resistance, chipping resistance, and fracture resistance were improved, so the processing time until tool life was longer and the number of impacts was greater in Product Gifts than in Comparative Products, so tool life was significantly longer.
    权利要求:
    Claims (8)
    [0001]
    1. Coated cutting tool characterized by the fact that it comprises: a substrate; and a coating layer formed on a substrate surface, where the coating layer includes at least one layer of a Ti compound layer, the Ti compound layer is a compound that contains an element of Ti and at least one element selected from the group consisting of C, N, O and B, the Ti compound layer has a region that is the smallest area surrounded by cracks when a polished surface approximately parallel to the substrate surface in the Ti compound layer is seen from the approximately normal direction of the surface, within the region there is an intermittent crack, one end or both ends of the intermittent crack not coming into contact with the cracks that constitute the region, and the relationship between a number density average A of the region and a density of average number B of the intermittent crack satisfies 0.7 <B / A <2; the density of number A of the region is a number obtained by dividing the number of regions in fields measured by the area of the measured fields of view, and the density of number B of the intermittent crack is a number obtained by dividing the number of intermittent cracks in measured fields of view by the area of measured fields of view.
    [0002]
    2. Coated cutting tool according to claim 1, characterized in that the layer of Ti compound is formed on the surface of the substrate and has an average layer thickness of 2 to 20 pm.
    [0003]
    Coated cutting tool according to either of claims 1 or 2, characterized in that the coating layer has an aluminum oxide layer with an average layer thickness of 1 to 15 pm on a layer surface of Ti compound.
    [0004]
    4. Coated cutting tool according to claim 3, characterized in that the aluminum oxide layer is a compound that additionally contains at least one element selected from the group consisting of Zr, Hf, V, Nb , Ta, Cr, Mo, W and Si.
    [0005]
    5. Coated cutting tool according to claim 3 or 4, characterized in that the coating layer includes the aluminum oxide layer and an outermost layer made up of at least one element selected from the group consisting of in Zr, Hf, V, Nb, Ta, Cr, Mo, W and Si and at least one member selected from the group consisting of C, N, O and B on a surface of the aluminum oxide layer.
    [0006]
    Coated cutting tool according to any one of claims 1 to 5, characterized in that the Ti compound layer is a compound that additionally contains at least one element selected from the group consisting of Zr, Hf , V, Nb, Ta, Cr, Mo, W, Al and Si.
    [0007]
    Coated cutting tool according to any one of claims 1 to 6, characterized in that the entire coating layer has a total layer thickness of 3 to 30 µm as a medium layer thickness.
    [0008]
    Coated cutting tool according to any one of claims 1 to 7, characterized by the fact that the substrate is any of cemented carbide, cermet, ceramic or sintered cubic boron nitride.
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    同族专利:
    公开号 | 公开日
    RU2635055C2|2017-11-08|
    KR20160029853A|2016-03-15|
    CN105579171A|2016-05-11|
    CA2922827A1|2015-02-26|
    CN105579171B|2017-12-01|
    EP3037196B1|2019-01-02|
    JPWO2015025903A1|2017-03-02|
    JP5962862B2|2016-08-03|
    CA2922827C|2017-01-31|
    RU2016109784A|2017-09-26|
    EP3037196A1|2016-06-29|
    US20160208379A1|2016-07-21|
    EP3037196A4|2017-03-29|
    KR101722009B1|2017-03-31|
    WO2015025903A1|2015-02-26|
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    法律状态:
    2019-12-17| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-08-11| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-11-17| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 21/08/2014, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2013170915|2013-08-21|
    JP2013-170915|2013-08-21|
    PCT/JP2014/071823|WO2015025903A1|2013-08-21|2014-08-21|Coated cutting tool|
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