WO2017204141A1 - Outil de coupe revêtu - Google Patents

Outil de coupe revêtu Download PDF

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Publication number
WO2017204141A1
WO2017204141A1 PCT/JP2017/018987 JP2017018987W WO2017204141A1 WO 2017204141 A1 WO2017204141 A1 WO 2017204141A1 JP 2017018987 W JP2017018987 W JP 2017018987W WO 2017204141 A1 WO2017204141 A1 WO 2017204141A1
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WO
WIPO (PCT)
Prior art keywords
layer
cutting tool
coated cutting
compound layer
cracks
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Application number
PCT/JP2017/018987
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English (en)
Japanese (ja)
Inventor
雄亮 平野
佐藤　博之
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株式会社タンガロイ
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Publication date
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Priority to JP2018519525A priority Critical patent/JP6736032B2/ja
Publication of WO2017204141A1 publication Critical patent/WO2017204141A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
    • C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
    • C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
    • C23C16/34—Nitrides
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
    • C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
    • C23C16/36—Carbonitrides
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
    • C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
    • C23C16/40—Oxides

Definitions

  • the present invention relates to a coated cutting tool.
  • a coated cutting tool in which a coating layer composed of layers is formed by vapor deposition with a total film thickness of 3 to 20 ⁇ m by chemical vapor deposition is used for cutting of steel, cast iron and the like.
  • the present invention has been made in order to solve these problems, and has excellent chipping resistance, wear resistance and chipping resistance by devising a crack generation mode of a coated cutting tool, and has a tool life.
  • An object of the present invention is to provide a long coated cutting tool.
  • the present inventors have conducted research on the extension of the tool life of the coated cutting tool, and when the number density of intermittent cracks on the flank surface is high, the work material and the coated cutting tool are rubbed during processing. It was found that rubbing wear occurs. And it discovered that abrasion resistance was not enough as a result of the particle
  • the gist of the present invention is as follows.
  • a coated cutting tool comprising a substrate and a coating layer formed on the surface of the substrate, The coated cutting tool has a rake face, a flank face, and a cutting edge ridge line portion between the rake face and the flank face,
  • the coating layer includes at least one Ti compound layer;
  • the Ti compound layer is a compound layer containing Ti or Ti and Al and at least one element selected from the group consisting of C, N, O and B,
  • the Ti compound layer when the polished surface substantially parallel to the surface of the substrate is viewed from above, the Ti compound layer has a region surrounded by cracks, Inside the region, the crack surrounding the region, and intermittent cracks that do not contact at one or both ends, At least part of the rake face, meet the average number density A r of the region and the average number density B r of the intermittent cracks 0.7 ⁇ B r / A r ⁇ 4.0, In at least a part of the flank, the average number density A f of
  • At least part of the rake face meet the average number density A r of the region and the average number density B r of the intermittent cracks 1.2 ⁇ B r / A r ⁇ 3.0, The average number density A f of the region and the average number density B f of the intermittent cracks satisfy 0.1 ⁇ B f / A f ⁇ 1.2 in at least a part of the flank, according to (1).
  • Coated cutting tool (3) The coated cutting tool according to any one of (1) and (2), wherein the Ti compound layer is formed on a surface of the base material and has an average thickness of 2.0 ⁇ m to 20.0 ⁇ m.
  • the Ti compound layer includes at least one TiCN layer;
  • an atomic ratio [C / (C + N)] of carbon to a total of carbon and nitrogen contained in the TiCN layer is 0.50 or more and 0.75 or less.
  • coated cutting tool of the present invention can improve the wear resistance without impairing the chipping resistance and chipping resistance, the tool life can be extended more than before.
  • the present embodiment a mode for carrying out the present invention (hereinafter simply referred to as “the present embodiment”) will be described in detail, but the present invention is not limited to the present embodiment described below.
  • the present invention can be variously modified without departing from the gist thereof.
  • the coated cutting tool of this embodiment includes a base material and a coating layer formed on the surface of the base material.
  • the coated cutting tool has a rake face, a flank face, and a cutting edge ridge line portion between the rake face and the flank face.
  • Specific examples of the coated cutting tool include milling or turning cutting edge exchangeable cutting inserts, drills, and end mills.
  • FIG. 1 is a schematic cross-sectional view showing an aspect of the coated cutting tool of the present embodiment.
  • the coated cutting tool 100 includes a base material 1 and a coating layer 2 formed on the surface of the base material 1, and a cutting blade between the rake face 3, the flank face 4, and the rake face 3 and the flank face 4. And a ridge line portion 5.
  • the coating layer 2 is a two-layer structure in which a Ti compound layer 11 and an aluminum oxide layer 12 described later are laminated on the surface of the substrate 1 in this order.
  • the substrate in the present embodiment is not particularly limited as long as it can be used as a substrate for a coated cutting tool.
  • the base material include at least one selected from the group consisting of cemented carbide, cermet, ceramics, cubic boron nitride sintered body, diamond sintered body, and high-speed steel.
  • the base material is at least one selected from the group consisting of cemented carbide, cermet, ceramics, and cubic boron nitride sintered body, the wear resistance and fracture resistance of the coated cutting tool are further improved. It is more preferable because it is more excellent.
  • These base materials may have a modified surface.
  • a de- ⁇ layer may be formed on the surface of the substrate, and when the substrate is a cermet, a surface hardened layer may be formed. .
  • a surface hardened layer may be formed.
  • the wear resistance tends to be further improved.
  • the average thickness of the entire coating layer is 30.0 ⁇ m or less.
  • the chipping resistance tends to be further improved.
  • the overall average thickness of the coating layer is preferably 3.0 ⁇ m or more and 30.0 ⁇ m or less. It is more preferably 2 ⁇ m or more and 25.0 ⁇ m or less, further preferably 3.4 ⁇ m or more and 22.0 ⁇ m or less, and particularly preferably 3.5 ⁇ m or more and 18.0 ⁇ m or less.
  • the coating layer includes at least one Ti compound layer.
  • the Ti compound layer is a compound layer containing Ti element or Ti element and Al element, and further containing at least one element selected from the group consisting of C, N, O and B, and Ti element or Ti element And at least one element selected from the group consisting of C, N, and O is preferable.
  • the Ti compound layer include a TiC layer, a TiN layer, a TiCN layer, a TiCO layer, a TiCNO layer, a TiAlCO layer, and a TiAlCNO layer.
  • the Ti compound layer may be composed of one layer or may be composed of multiple layers (for example, two layers or three layers).
  • the TiC layer or TiN layer is formed as the first layer on the surface of the substrate, and the TiCN layer is formed as the second layer on the surface of the first layer. May be.
  • a TiCO layer, a TiCNO layer, a TiAlCO layer, or a TiAlCNO layer is provided on the surface of the second layer as a third layer. You may form as.
  • the Ti compound layer is formed on the surface of the base material because the adhesion between the base material and the coating layer is further improved. Further, when the average thickness of the Ti compound layer is 2.0 ⁇ m or more, the wear resistance tends to be further improved. On the other hand, when the average thickness of the Ti compound layer is 20.0 ⁇ m or less, the chipping resistance tends to be further improved. For this reason, the average thickness of the Ti compound layer is preferably 2.0 ⁇ m or more and 20.0 ⁇ m or less, and from the same viewpoint, it is more preferably 3.0 ⁇ m or more and 15.0 ⁇ m or less, and 4.0 ⁇ m or more. More preferably, it is 14.0 ⁇ m or less.
  • the “average thickness of the Ti compound layer” here refers to the average thickness of one layer when the Ti compound layer is composed of one layer, and the Ti compound layer is composed of multiple layers. The average thickness of the entire Ti compound layer.
  • the Ti compound layer has a region surrounded by cracks in the Ti compound layer when the polished surface substantially parallel to the surface of the substrate is viewed from above, and inside the region. Has a crack surrounding the region and an intermittent crack that does not contact at one or both ends.
  • “seen from the top surface” means that the polished surface of the Ti compound layer is viewed from a substantially normal direction of the surface. In other words, it means a case where the surface of the coating layer is viewed from the surface side before polishing, that is, a case where the surface is viewed from the opposite side of the substrate.
  • B r / A r is less than 4.0, it is possible to prevent the cracks surrounding the region from being easily connected to the intermittent cracks. Thereby, the covering cutting tool can suppress a fall of fracture resistance.
  • B r / A r is more preferably 0.9 ⁇ B r / A r ⁇ 3.5, and further preferably 1.2 ⁇ B r / A r ⁇ 3.0. preferable.
  • coated cutting tool of the present embodiment at least a portion of the flank face, and the average number density A f in the region and the average number density B f intermittent crack satisfies 0.1 ⁇ B f / A f ⁇ 1.5 Thereby, it can suppress that the particle
  • B f / A f exceeds 0.1, an effect of stopping the progress of the crack generated in the coating layer during cutting by the intermittent crack due to the appropriate distribution of the intermittent crack is obtained. Thereby, chipping resistance and chipping resistance of the coated cutting tool are improved.
  • B f / A f is less than 1.5, rubbing wear on the flank face can be suppressed, so that the coated cutting tool is excellent in wear resistance.
  • B f / A f is more preferably 0.1 ⁇ B f / A f ⁇ 1.3, and further preferably 0.1 ⁇ B f / A f ⁇ 1.2. preferable.
  • the coated cutting tool of the present embodiment when B r / A r and B f / A f have a relationship of B r / A r > B f / A f , cracks generated in the coated layer during cutting Is excellent in balance between the effect of stopping with intermittent cracks and the effect of suppressing rubbing wear on the flank. Thereby, the coated cutting tool is excellent in wear resistance, chipping resistance, and fracture resistance.
  • the average number density B r of average number density A r intermittent crack region satisfies 1.2 ⁇ B r / A r ⁇ 3.0, escape at least a portion of the surface, and the average number density a f in the region and the average number density B f intermittent cracks preferably satisfies 0.1 ⁇ B f / a f ⁇ 1.2.
  • the polishing surface of the Ti compound layer is polished until the surface or the inside of the Ti compound layer is exposed in a direction substantially parallel to the surface of the base material in at least a part of the rake face or the flank face. It is the surface of the Ti compound layer obtained by the above. At this time, it is preferable to obtain the polished surface at a position where 50% or more of the average thickness of the Ti compound layer remains.
  • the coated cutting tool in which the Ti compound layer having a plurality of compositions is formed measures the region of the layer having the thickest average thickness and intermittent cracks.
  • the region observed on the polished surface of the Ti compound layer on the rake face or the flank face is a crack generated in the coating layer upon cooling after forming the coating layer, dry blasting, It is a range surrounded by cracks generated in the coating layer by processing such as shot peening.
  • “Number of regions” is, for example, “region surrounded by cracks”, and a small unit in which no region surrounded by cracks is further formed is defined as one region. However, if there are n small regions that do not share a crack in the “region surrounded by cracks”, the number is (n + 1) regions. Specifically, in the case of the region 20 shown in FIG.
  • the “number of regions” in this example is There are three. In this example, it can be said that the small units 21 and 22 (or 22 and 23, or 21, 22, and 23) form one region. However, since these regions are not small units, It is not included in the “number of regions” in the embodiment. On the other hand, in the case of the region 30 shown in FIG. 3, there are two small regions 31 and 32 that do not share a crack surrounding the region 30, and therefore, the “number of regions” in this example is three.
  • the average number density of the regions on the rake face or the flank face can be obtained by the following method. That is, the number density of the regions can be obtained by measuring the number of regions observed on the polished surface of the Ti compound layer and dividing the measured number of regions by the area of the measured Ti compound layer. And the number density of each area
  • the rake face, the average number density of the area observed on the polished surface of the Ti compound layer and A r, the flank, the mean number density of the area observed on the polished surface of the Ti compound layer and A f, below, Ar and A f are collectively referred to as A.
  • intermittent crack refers to a crack that surrounds a region and a crack that does not contact at one or both ends.
  • the mode of the intermittent crack is, for example, a mode in which no crack is in contact with the region, a crack progresses from the crack surrounding the region toward the inside of the region, but progresses in the middle without crossing the region. The aspect which has stopped is mentioned.
  • the average number density of intermittent cracks on the rake face or flank face can be obtained by the following method. That is, the number of interrupted cracks observed on the polished surface of the Ti compound layer is measured, and the number of interrupted cracks measured is divided by the measured area of the Ti compound layer, whereby the number density of interrupted cracks is obtained. Each number density of the measured visual fields is summed, and the average number density is obtained by dividing the total of each number density by the number of measured visual fields.
  • the rake face, the average number density of intermittent cracks observed on the polished surface of the Ti compound layer and B r, in the flank, the mean number density of the intermittent cracks observed on the polished surface of the Ti compound layer and B f, Br and Bf are collectively referred to as B.
  • the Ti compound layer includes at least one TiCN layer because the wear resistance is further improved.
  • the average particle size of the TiCN layer is 0.3 ⁇ m or more, the chipping resistance tends to be further improved.
  • the average particle size of the TiCN layer is 2.0 ⁇ m or less, the wear resistance on the flank surface tends to be further improved.
  • the average particle size of the TiCN layer is preferably 0.3 ⁇ m or more and 2.0 ⁇ m or less from the viewpoint of further improving the fracture resistance and wear resistance in a balanced manner. From the same viewpoint, the average particle size of the TiCN layer is more preferably 0.3 ⁇ m or more and 1.5 ⁇ m or less.
  • the average particle size of the TiCN layer can be obtained by the following method. That is, the coated cutting tool is heated at 1200 ° C. for 10 minutes in a vacuum, and the binder phase component of the cemented carbide base material is diffused into the grain boundaries of the TiCN layer. Thereafter, the mirror-polished surface of the cross section in the orthogonal direction of the coated cutting tool is observed with a scanning electron microscope (SEM), and a photograph is taken. At this time, it is preferable to observe a backscattered electron image of 5000 to 20000 times.
  • SEM scanning electron microscope
  • a straight line is drawn in a parallel direction with respect to the interface between the cemented carbide base material and the coating layer, and the number of grain boundaries of the TiCN layer crossing the straight line is measured.
  • the average particle size of the TiCN layer is calculated.
  • the straight line may be drawn at a position of 40% or more and 60% of the average thickness of the TiCN layer.
  • the wear resistance tends to be further improved. It is in.
  • the atomic ratio [C / (C + N)] is 0.75 or less, the fracture resistance tends to be further improved.
  • the atomic ratio [C / (C + N)] is preferably 0.50 or more and 0.75 or less. From the same viewpoint, the atomic ratio [C / (C + N)] is more preferably 0.50 or more and 0.70 or less.
  • the atomic ratio [C / (C + N)] of carbon to the total of carbon and nitrogen contained in the TiCN layer is, for example, the amount of C in the TiCN layer by an electron probe microanalyzer (EPMA). And N amount.
  • the coating layer includes an aluminum oxide layer (hereinafter referred to as “Al 2 O 3 layer”) on the surface of the Ti compound layer
  • Al 2 O 3 layer an aluminum oxide layer
  • the crystal type of the Al 2 O 3 layer is not particularly limited, and examples include ⁇ -type, ⁇ -type, ⁇ -type, ⁇ -type, ⁇ -type, ⁇ -type, pseudo- ⁇ -type, ⁇ -type, and ⁇ -type.
  • the crystal type of the Al 2 O 3 layer is preferably ⁇ type from the viewpoint of being more stable even at high temperatures, and from the viewpoint of further improving the adhesion between the Ti compound layer and the Al 2 O 3 layer.
  • the ⁇ type is preferred.
  • the Al 2 O 3 layer is an ⁇ -type Al 2 O 3 layer because defects and chipping are less likely to occur.
  • the average thickness of the Al 2 O 3 layer is 1.0 ⁇ m or more, the crater wear resistance on the rake face tends to be further improved.
  • the average thickness of the Al 2 O 3 layer is 15.0 ⁇ m or less, the fracture resistance tends to be further improved.
  • the average thickness of the Al 2 O 3 layer is preferably 1.0 ⁇ m or more and 15.0 ⁇ m or less, from the same viewpoint. More preferably, it is 3.0 ⁇ m or more and 12.0 ⁇ m or less, and further preferably 5.0 ⁇ m or more and 12.0 ⁇ m or less.
  • FIG. 4 shows an example of a photograph of the polished surface substantially parallel to the surface of the rake face of the substrate in the Ti compound layer of the present embodiment viewed from above, and the flank of the substrate in the Ti compound layer of the present embodiment.
  • An example of a photograph of a polished surface substantially parallel to the surface viewed from the top is shown in FIG.
  • each layer constituting the coating layer in the coated cutting tool of the present embodiment for example, the following method can be exemplified.
  • the TiN layer When the TiN layer is included in the Ti compound layer, for example, the TiN layer has a raw material gas composition of TiCl 4 : 3.0 to 10.0 mol%, N 2 : 20 to 60 mol%, H 2 : the balance, and temperature: It can be formed by chemical vapor deposition at 850 to 920 ° C. and pressure: 100 to 350 hPa.
  • the TiCN layer When the TiCN layer is included in the Ti compound layer, for example, the TiCN layer has a raw material gas composition of TiCl 4 : 10 to 15 mol%, CH 3 CN: 1 to 3 mol%, N 2 : 0 to 20 mol%, H 2 : The remainder can be formed by chemical vapor deposition at a temperature of 850 to 920 ° C. and a pressure of 60 to 80 hPa.
  • C / (C + N) in the TiCN layer can be adjusted only to less than 0.65.
  • the raw material gas composition is TiCl 4 : 1.0 to 8.0 mol%, CH 3 CN: 1.0 to 2.0 mol %, C 3 H 6 : 1.0 to 2.0 mol%, N 2 : 10 to 50 mol%, H 2 : balance, temperature: 700 to 900 ° C., pressure: 50 to 100 hPa. be able to.
  • the TiC layer When the TiC layer is included in the Ti compound layer, the TiC layer has, for example, a raw material gas composition of TiCl 4 : 1.0 to 3.0 mol%, CH 4 : 4.0 to 6.0 mol%, H 2 : balance And a temperature of 990 to 1030 ° C. and a pressure of 50 to 100 hPa.
  • the ⁇ -type Al 2 O 3 layer has a raw material gas composition of AlCl 3 : 2.1 to 5.0 mol%, CO 2 : 2. 5 to 4.0 mol%, HCl: 2.0 to 3.0 mol%, H 2 S: 0.28 to 0.45 mol%, H 2 : balance, temperature: 900 to 1000 ° C., pressure: 60 to 80 hPa It can be formed by chemical vapor deposition.
  • the ⁇ -type Al 2 O 3 layer has, for example, a material gas composition of AlCl 3 : 2.1 to 5.0 mol%, CO 2 : 2. 0 to 6.0 mol%, CO: 3.0 to 5.5 mol%, HCl: 3.0 to 5.0 mol%, H 2 S: 0.3 to 0.5 mol%, H 2 : remainder, temperature: It can be formed by chemical vapor deposition at 900 to 1000 ° C. and pressure: 60 to 80 hPa.
  • the TiAlCNO layer has, for example, a raw material gas composition of TiCl 4 : 3.0 to 5.0 mol%, AlCl 3 : 1.0 to 2.0 mol%, CO: 0.00. It can be formed by chemical vapor deposition using 4 to 1.0 mol%, N 2 : 30 to 40 mol%, H 2 : balance, temperature: 975 to 1025 ° C., and pressure: 90 to 120 hPa.
  • the TiAlCO layer has, for example, a material gas composition of TiCl 4 : 0.5 to 1.5 mol%, AlCl 3 : 3.0 to 5.0 mol%, CO: 2. It can be formed by a chemical vapor deposition method with 0 to 4.0 mol%, H 2 : the balance, temperature: 975 to 1025 ° C., and pressure: 60 to 100 hPa.
  • the TiCNO layer has, for example, a raw material gas composition of TiCl 4 : 3.0 to 5.0 mol%, CO: 0.4 to 1.0 mol%, N 2 : 30 to It can be formed by chemical vapor deposition with 40 mol%, H 2 : balance, temperature: 975 to 1025 ° C., and pressure: 90 to 110 hPa.
  • the TiCO layer When the TiCO layer is included in the Ti compound layer, for example, the TiCO layer has a raw material gas composition of TiCl 4 : 0.5 to 1.5 mol%, CO: 2.0 to 4.0 mol%, H 2 : balance. , Temperature: 975 to 1025 ° C., pressure: 60 to 100 hPa.
  • a coated cutting tool that satisfies the relationship between the average number density of regions and the average number density of intermittent cracks in each Ti compound layer on the rake face and the flank face can be obtained by, for example, the following method.
  • the average number density B of intermittent cracks in the Ti compound layer can be easily controlled.
  • the aspect ratio of the projection material is preferably 1.5 or more and 3.0 or less, and more preferably, the projection material has a sharp convex portion.
  • the dry shot blasting conditions are such that the projection angle is 80 ° to 90 ° with respect to the surface of the rake face coating layer, and the projection material is 80 m / sec to The projection may be performed at a projection speed of 100 m / sec and a projection time of 0.5 minutes to 1.0 minutes.
  • the dry shot blasting projection material is preferably made of a material such as Al 2 O 3 or ZrO 2 having an average particle diameter of 160 ⁇ m to 200 ⁇ m.
  • dry shot blasting conditions are such that the projection angle is 80 ° to 90 ° with respect to the surface of the flank coating layer, and the projection material is 40 to 60 m / sec. It is better to project at a projection speed of 0.5 to 1.0 minutes.
  • the dry shot blasting projection material is preferably made of a material such as Al 2 O 3 or ZrO 2 having an average particle size of 100 to 140 ⁇ m. At this time, the form of cracks can be easily controlled by masking the surface not subjected to dry shot blasting.
  • the aspect ratio of the projection material is a value obtained by dividing the maximum diameter value of the projection material by the minimum diameter value.
  • the average particle diameter of the projection material is an average value of the maximum diameter value and the minimum diameter value in the projection material.
  • the projection angle is an angle formed by the surface of the coating layer and the angle at which the projection material is projected. Therefore, when dry shot blasting is applied to the rake face, it refers to the angle formed by the surface of the coating layer of the rake face and the angle at which the projection material is projected.When dry shot blasting is applied to the flank face, It refers to the angle between the surface of the coating layer and the angle at which the projection material is projected.
  • the thickness of each layer can be measured from the cross-sectional structure of the coated cutting tool using an optical microscope, SEM, field emission scanning electron microscope (FE-SEM) or the like.
  • the thickness of the coated cutting tool may be determined by measuring three or more thicknesses of each layer at a position in the vicinity of 50 ⁇ m from the cutting edge toward the rake face of the coated cutting tool, and obtaining an average value thereof.
  • the composition of each layer can be measured from the cross-sectional structure of the coated cutting tool of the present embodiment using an energy dispersive X-ray spectrometer (EDS), a wavelength dispersive X-ray spectrometer (WDS), or the like.
  • EDS energy dispersive X-ray spectrometer
  • WDS wavelength dispersive X-ray spectrometer
  • Examples of the method for measuring the average number density in the region of the Ti compound layer and the intermittent cracks include the following methods.
  • the coated cutting tool is polished in a direction substantially parallel to the surface of the substrate until the surface or the inside of the Ti compound layer is exposed to obtain a polished surface of the Ti compound layer.
  • the polished surface is etched with hydrofluoric acid, cracks can be easily observed.
  • the polished surface is observed at 300 to 750 times using an optical microscope, and a photograph of the polished surface is taken. Using this photograph of the polished surface, the number of Ti compound layer regions and the number of intermittent cracks are measured. By dividing the number of measured regions and the number of intermittent cracks by the measured area, the number density of the regions and intermittent cracks can be obtained.
  • the total number density of the areas of each visual field and the number of interrupted cracks is summed and divided by the number of measured fields of view, respectively, to obtain the average number density A of the areas and the average number density B of the intermittent cracks. It is preferable to measure a range of 0.2 mm 2 or more using a photograph of the polished surface, more preferably to measure a range of 0.25 mm 2 or more, and further to measure a range of 0.3 mm 2 or more. preferable.
  • the region in which it is not possible to confirm whether or not the region has been formed due to the break of the crack at the end of the photograph is 0.5 region.
  • the average number density A of regions and the average number density B of interrupted cracks on the rake face and flank face can be obtained by the measurement method described above.
  • a cemented carbide cutting insert of 86.0WC-1.0TiCN-1.0TaC-0.5NbC-0.5ZrC-11.0Co (more than by mass) composition having a JIS standard CNMG120212 shape was prepared as a base material.
  • the surface of the base material was cleaned after round honing was performed on the cutting edge ridge line portion of the base material with a SiC brush.
  • the base material is inserted into an external heating chemical vapor deposition apparatus, and the coating layer is formed on the surface of the base material so as to have the composition and average thickness of the coating layer shown in Table 3 under the film forming conditions shown in Table 1. Formed.
  • the TiCN layer of each sample was formed under the film forming conditions shown in Table 2.
  • the TiCN layer deposition conditions shown in Table 2 correspond to the types of coating layers shown in Table 1. Ten samples were prepared each. ⁇ in the crystal form of the aluminum oxide layer (Al 2 O 3 layer) shown in Table 3 represents an ⁇ -type Al 2 O 3 layer, and ⁇ represents a ⁇ -type Al 2 O 3 layer.
  • each layer of the obtained sample was measured with three SEM cross sections near the position of 50 ⁇ m from the cutting edge of the coated cutting tool toward the center of the rake face, and the average value (arithmetic average value) was measured. Asked.
  • the obtained sample was polished until the Ti compound layer was exposed in a direction substantially parallel to the surface of the substrate. At this time, a rake face and a flank polished face were prepared.
  • the polished surface of the Ti compound layer was adjusted to a position where 70% of the average thickness of the Ti compound layer remained, and the polished surface of the Ti compound layer was etched with hydrofluoric acid.
  • the polished surface of the Ti compound layer was observed at 300 times using an optical microscope, and a photograph of the polished surface in the range of 0.33 mm 2 was taken.
  • the atomic ratio [C / (C + N)] of C with respect to the total of C and N contained in the TiCN layer of the obtained sample is about 50 ⁇ m from the edge of the coated cutting tool toward the center of the rake face. It measured using EPMA from the cross section. The results obtained are shown in Table 6.
  • the obtained sample is held at 1200 ° C. for 10 minutes in a vacuum and heat-treated to diffuse the binder phase component of the cemented carbide substrate into the grain boundaries of the TiCN layer, and then the vertical section of the coated cutting tool.
  • the mirror polished surface was observed with an SEM, and a photograph was taken.
  • draw a straight line in a parallel direction with respect to the interface between the cemented carbide base material and the coating layer and measure the number of grain boundaries of the TiCN layer across the straight line.
  • the average particle size of the TiCN layer was calculated. At this time, a straight line was drawn at a position of 50% of the average thickness of the TiCN layer. The results obtained are shown in Table 7.
  • the coated cutting tool of the present invention can improve wear resistance without impairing chipping resistance and chipping resistance, and can extend the tool life as compared with the prior art. High availability on.
  • SYMBOLS 1 Base material, 2 ... Coating layer, 3 ... Rake face, 4 ... Flank face, 5 ... Cutting edge ridge part, 11 ... Ti compound layer, 12 ... Aluminum oxide layer, 20, 30 ... Area, 21-23 ... Small Units 31, 32 ... small area, 100 ... coated cutting tool.

Abstract

L'invention concerne un outil de coupe revêtu, lequel outil comporte un substrat et une couche de revêtement formée sur la surface du substrat, et dans lequel outil : l'outil de coupe revêtu a une face de coupe, une face de flanc, et une partie de ligne de crête de bord de coupe entre la face de coupe et la face de flanc ; la couche de revêtement comprend au moins une couche de composite de Ti ; la couche de composite de Ti est une couche composite comprenant du Ti ou du Ti et de l'Al, et au moins un élément sélectionné parmi le groupe comprenant C, N, O, et B ; quand une surface de polissage de la couche de composite de Ti qui est sensiblement parallèle à la surface du substrat est vue à partir de la surface supérieure, la couche de composite de Ti a des régions entourées par des fissures, et a, à l'intérieur des régions, des fissures intermittentes qui ne sont pas en contact, à l'une ou aux deux extrémités, avec les fissures entourant les régions ; dans au moins une partie de la face de coupe, la densité moyenne en nombre Ar des régions et la densité moyenne en nombre Br des fissures intermittentes satisfont à 0,7 < Br/Ar < 4,0 ; dans au moins une partie de la face de flanc, la densité moyenne en nombre Af et la densité moyenne en nombre Bf des fissures intermittentes satisfont à 0,1 < Bf/Af < 1,5 ; et la relation Br/Ar > Bf/Af est présente.
PCT/JP2017/018987 2016-05-24 2017-05-22 Outil de coupe revêtu WO2017204141A1 (fr)

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WO2020050260A1 (fr) * 2018-09-05 2020-03-12 京セラ株式会社 Outil revêtu et outil de coupe
CN113853265A (zh) * 2019-08-06 2021-12-28 住友电工硬质合金株式会社 切削工具
CN114888975A (zh) * 2022-05-06 2022-08-12 东岳机械股份有限公司 一种加气混凝土板材刀组自动旋转换刀装置
US11964328B2 (en) 2018-09-05 2024-04-23 Kyocera Corporation Coated tool and cutting tool
JP7473069B1 (ja) 2023-12-13 2024-04-23 株式会社タンガロイ 被覆切削工具
CN114888975B (zh) * 2022-05-06 2024-05-10 东岳机械股份有限公司 一种加气混凝土板材刀组自动旋转换刀装置

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WO2020050260A1 (fr) * 2018-09-05 2020-03-12 京セラ株式会社 Outil revêtu et outil de coupe
CN112654450A (zh) * 2018-09-05 2021-04-13 京瓷株式会社 涂层刀具及切削刀具
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CN113853265A (zh) * 2019-08-06 2021-12-28 住友电工硬质合金株式会社 切削工具
CN113853265B (zh) * 2019-08-06 2024-03-01 住友电工硬质合金株式会社 切削工具
CN114888975A (zh) * 2022-05-06 2022-08-12 东岳机械股份有限公司 一种加气混凝土板材刀组自动旋转换刀装置
CN114888975B (zh) * 2022-05-06 2024-05-10 东岳机械股份有限公司 一种加气混凝土板材刀组自动旋转换刀装置
JP7473069B1 (ja) 2023-12-13 2024-04-23 株式会社タンガロイ 被覆切削工具

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