WO2023189127A1 - 超硬合金およびこれを用いた被覆工具、切削工具 - Google Patents

超硬合金およびこれを用いた被覆工具、切削工具 Download PDF

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Publication number
WO2023189127A1
WO2023189127A1 PCT/JP2023/007459 JP2023007459W WO2023189127A1 WO 2023189127 A1 WO2023189127 A1 WO 2023189127A1 JP 2023007459 W JP2023007459 W JP 2023007459W WO 2023189127 A1 WO2023189127 A1 WO 2023189127A1
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WIPO (PCT)
Prior art keywords
cemented carbide
layer
region
free layer
intersection region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/JP2023/007459
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English (en)
French (fr)
Japanese (ja)
Inventor
彰浩 勝丸
尚久 松田
友也 天見
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Kyocera Corp
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Kyocera Corp
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Publication date
Application filed by Kyocera Corp filed Critical Kyocera Corp
Priority to JP2024511518A priority Critical patent/JP7801429B2/ja
Priority to US18/851,065 priority patent/US20250205788A1/en
Priority to CN202380028719.3A priority patent/CN118900926A/zh
Priority to DE112023001600.3T priority patent/DE112023001600T5/de
Publication of WO2023189127A1 publication Critical patent/WO2023189127A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
    • C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
    • 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
    • B23B27/148—Composition of the cutting inserts
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
    • C22C29/10—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on titanium carbide
    • 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
    • C23C16/403—Oxides of aluminium, magnesium or beryllium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B22F2003/241—Chemical after-treatment on the surface
    • B22F2003/242—Coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2228/00—Properties of materials of tools or workpieces, materials of tools or workpieces applied in a specific manner
    • B23B2228/10—Coatings
    • B23B2228/105—Coatings with specified thickness

Definitions

  • the present disclosure relates to a cemented carbide, a coated tool, and a cutting tool using the same.
  • Cemented carbide containing WC (tungsten carbide) as a hard phase is used for substrates in coated tools, etc., and is used in cutting tools such as end mills. Such cemented carbide is required to have fracture resistance and the like.
  • Patent Document 1 describes that the ridgeline of the cutting edge of a cemented carbide has a ⁇ -free layer. The thickness is also listed.
  • Patent No. 3656838 Patent Document 2 does not mention that there is a ⁇ -free layer on the ridgeline of the cutting edge of the cemented carbide, and it is not possible to adjust the thickness of the ⁇ -free layer on the rake face and flank face. Are listed.
  • a non-limiting aspect of the cemented carbide of the present disclosure has a hard phase containing W and C, a solid solution phase containing W, C, and Ti, and a binder phase containing an iron group metal.
  • the cemented carbide has a beta-free layer consisting only of WC and iron group metals on the surface of the intersection region of the rake face and flank face.
  • the average thickness of the ⁇ -free layer on the rake face in the intersection area is a
  • the average thickness of the ⁇ -free layer on the flank face in the intersection area is b.
  • the relationship between a and b satisfies b ⁇ a.
  • a non-limiting one-sided coated tool of the present disclosure includes the above cemented carbide and a coating layer located on the surface of the cemented carbide.
  • a non-limiting one-sided cutting tool of the present disclosure includes a holder that extends from a first end toward a second end and has a pocket on the first end side, and the above-mentioned covered tool located in the pocket.
  • FIG. 1 is a perspective view illustrating a non-limiting side of a cemented carbide of the present disclosure
  • FIG. FIG. 2 is a cross-sectional view of section II in the cemented carbide shown in FIG. 1, and is a cross-sectional view perpendicular to the intersection region when viewed from the top (plan view) from the rake face.
  • FIG. 2 is a cross-sectional view showing the vicinity of the surface of a non-limiting one-sided coated tool of the present disclosure.
  • FIG. 2 is a cross-sectional view showing the vicinity of the surface of a non-limiting one-sided coated tool of the present disclosure.
  • 1 is a perspective view of a non-limiting one-sided cutting tool of the present disclosure; FIG.
  • cemented carbide 1 of the present disclosure will be described in detail using the drawings. However, in each figure referred to below, only main members necessary for explaining the embodiment are shown in a simplified manner for convenience of explanation. Therefore, the cemented carbide 1 may include any constituent members not shown in the referenced figures. Further, the dimensions of the members in each figure do not faithfully represent the dimensions of the actual constituent members or the dimensional ratios of each member. These points also apply to coated tools and cutting tools that will be described later.
  • Cemented carbide 1 may have a hard phase, a solid solution phase, and a binder phase.
  • the hard phase may contain W (tungsten) and C (carbon).
  • the hard phase may contain WC.
  • the hard phase may contain WC as a main component.
  • "Main component” may mean a component having the largest mass % value compared to other components. Specifically, W and C may be the top two components in terms of mass % among the components contained in the hard phase.
  • the solid solution phase may contain W, C, and Ti (titanium).
  • the solid solution phase may contain W, C, and Ti as main components. That is, in the solid solution phase, the total value of the mass % of each of W, C, and Ti may be the largest. Furthermore, among the components contained in the solid solution layer, the top three in terms of mass % may be W, C, and Ti.
  • the binder phase may contain an iron group metal.
  • iron group metals include Co (cobalt) and Ni (nickel).
  • the bonded phase may contain at least one of Co and Ni.
  • the binder phase may contain an iron group metal as a main component.
  • the binding phase can function as a phase that binds adjacent hard phases. Iron group metals including Co and Ni, for example, may have the largest mass % value among the components contained in the binder phase.
  • composition of each of the hard phase, solid solution phase, and binder phase may be measured by, for example, energy dispersive X-ray spectroscopy (EDS).
  • EDS energy dispersive X-ray spectroscopy
  • the measurement may be performed using an EDS attached to an electron microscope.
  • the electron microscope include a scanning electron microscope (SEM) and a transmission electron microscope (TEM).
  • the cemented carbide 1 may have a rake face 3 and a flank face 5. That is, the cemented carbide 1 may be shaped like a cutting tool. Moreover, the cemented carbide 1 may have a plate shape.
  • the cemented carbide 1 may have a rectangular plate shape, as shown in a non-limiting example shown in FIG. In this case, the upper surface may be the rake surface 3, and the side surface may be the flank surface 5.
  • the shape of the cemented carbide 1 is not limited to the square plate shape.
  • the rake face 3 may be triangular, pentagonal, hexagonal or circular.
  • Cemented carbide 1 is not limited to a specific size.
  • the width D1 of the rake face 3 may be set to 3 to 20 mm.
  • the width D2 of the flank surface 5 may be set to 5 to 20 mm.
  • the width D1 and the width D2 may be dimensions in a direction perpendicular to the intersection ridgeline of the rake face 3 and the flank face 5.
  • the cemented carbide 1 may have an intersection region 7 between the rake face 3 and the flank face 5.
  • the intersection region 7 is a ridgeline portion of the cutting edge, and the cutting edge may be honed as a cutting edge treatment, and the portion subjected to the cutting edge treatment may be used as the ridgeline portion of the cutting edge.
  • the honing process may be a processing method in which a grindstone (horn) is pressed and rotated back and forth to polish the object.
  • the intersection area 7 may be a honed area of the intersection ridgeline between the rake face 3 and the flank face 5.
  • the area S2 from the boundary L2 on the side of the flank 5 of the cutting edge ridge to the rake face 3 may be the intersection area 7 (see FIG. 2).
  • a position 80 ⁇ m from the flank surface 5 when viewed from above from the rake surface 3 may be regarded as the boundary L1.
  • a position 60 ⁇ m from the rake face 3 when viewed from above from the flank 5 may be regarded as the boundary L2.
  • the intersection area 7 may have a convex curved shape.
  • the shape of the intersection region 7 is not limited to a convex curved shape.
  • the intersection area 7 may have a planar shape that has been chamfered. Note that since the intersection region 7 having a planar shape is inclined with respect to the rake surface 3 and the flank surface 5, the end of the intersection region 7 on the rake surface 3 side and the end of the intersection region 7 on the flank surface 5 side. and can be easily identified.
  • intersection area 7 has a convex curved shape
  • the end of the intersection area 7 on the side of the rake face 3 and the end of the intersection area 7 on the side of the flank 5 can be easily identified.
  • the intersecting region 7 may be located in a part of the intersecting ridgeline between the rake face 3 and the flank face 5, or may be located on the entire intersecting ridgeline.
  • the intersection area 7 can be used for cutting a workpiece.
  • the cemented carbide 1 may have a ⁇ -free layer 9 made of only WC and iron group metals on the surface of the intersection region 7, as shown in a non-limiting example shown in FIG.
  • the ⁇ -free layer 9 is rich in iron group metals such as Co and has high toughness, and can function as a layer that absorbs the impact generated between the workpiece and the workpiece during cutting and suppresses chipping. . Therefore, when the cemented carbide 1 has the non- ⁇ layer 9 on the surface of the intersection region 7, the intersection region 7 is less likely to be damaged.
  • the ⁇ -free layer 9 consisting only of WC and iron group metals means that almost all of the components constituting the ⁇ -free layer 9 are WC and iron group metals.
  • the ⁇ -free layer 9 may contain impurities at a level unavoidable due to the manufacturing process.
  • the total content of impurities may be 3% by mass or less, in other words, the total content of WC and iron group metals may be 97% by mass or more.
  • the cemented carbide 1 may have a ⁇ -free layer 9 on the entire surface of the intersection region 7.
  • the entire surface of the intersection region 7 may be the ⁇ -free layer 9.
  • the cemented carbide 1 may also have a ⁇ -free layer 9 on the surface other than the intersection region 7.
  • the iron group metal in the ⁇ -free layer 9 may have the same composition as the iron group metal in the binder phase.
  • the confirmation of the ⁇ -free layer 9 may be performed, for example, by EDS.
  • the average thickness of the ⁇ -free layer 9 on the rake face 3 in the intersection region 7 may be a
  • the average thickness of the ⁇ -free layer 9 on the flank face 5 in the intersection region 7 may be set as b.
  • the relationship between a and b may satisfy b ⁇ a. In this case, cracks, chipping, etc. are less likely to occur in the intersection region 7, and the intersection region 7 is less likely to be damaged. Therefore, the fracture resistance of the cemented carbide 1 is high.
  • the relationship between a and b may satisfy 1 ⁇ a/b ⁇ 2.5. In this case, the fracture resistance of the cemented carbide 1 is likely to improve.
  • the relationship between a and b may satisfy 1.5 ⁇ a/b ⁇ 2.5. In this case, the fracture resistance of the cemented carbide 1 is likely to be further improved.
  • the average thickness of the ⁇ -free layer 9 on the rake face 3 in the intersection area 7 can also mean the average thickness of the ⁇ -free layer 9 at the end of the intersection area 7 on the rake face 3 side as seen from the rake face 3. good. Therefore, the average thickness of the ⁇ -free layer 9 on the rake face 3 in the intersection region 7 may be rephrased as the average thickness of the ⁇ -free layer 9 in the region S1a located at the end of the intersection region 7 on the rake face 3 side.
  • the region S1a may be, for example, a region 10 ⁇ m from the boundary L1.
  • the average thickness of the ⁇ -free layer 9 of the flank surface 5 in the intersection region 7 means the average thickness of the ⁇ -free layer 9 at the end of the intersection region 7 on the flank surface 5 side when viewed from the flank surface 5. It's okay. Therefore, the average thickness of the ⁇ -free layer 9 of the flank surface 5 in the intersection region 7 may be rephrased as the average thickness of the ⁇ -free layer 9 in the region S2a located at the end of the flank surface 5 in the intersection region 7.
  • the region S2a may be, for example, a region 5 ⁇ m from the boundary L2.
  • the thickness of the ⁇ -free layer 9 may be measured by cross-sectional observation using an electron microscope.
  • the cross section to be observed may be, for example, a cross section as shown in FIG. That is, the cross section to be observed may be a cross section perpendicular to the intersection region 7 when viewed from above (planar view) from the rake face 3.
  • the thickness of the ⁇ -free layer 9 may be measured at five or more measurement points at intervals of 1 ⁇ m over a width of 5 ⁇ m or more at any position in the region S1a or the region S2a, and the average value thereof may be calculated. .
  • a and b are not limited to specific thicknesses.
  • a may be set to 7.3 to 14.3 ⁇ m.
  • b may be set to 2.9 to 13 ⁇ m.
  • the average thickness of the ⁇ -free layer 9 in the intersection region 7 may decrease monotonically from the rake face 3 side toward the flank face 5 side.
  • the average thickness of the ⁇ -free layer 9 is as described above, cracks, chipping, etc. are less likely to occur in the intersection region 7, and the intersection region 7 is even less likely to be damaged.
  • intersection region 7 may further include a region located between the end on the rake face 3 side and the end on the flank surface 5 side, where the average thickness of the ⁇ -free layer 9 is c. .
  • the intersection region 7 may further have another region between the region S1a and the region S2a, and the average thickness of the ⁇ -free layer 9 in this region may be c.
  • c may be smaller than a and b.
  • intersection region 7 in a cross-sectional view has a convex curved shape as in the non-limiting example shown in FIG. may be located.
  • the radius of curvature of the intersecting region 7 in the region where the average thickness of the ⁇ -free layer 9 is c may be smaller than the radius of curvature of the intersecting region 7 in the region S1a and the region S2a.
  • the region where the average thickness of the ⁇ -free layer 9 is c may be located closer to the flank face 5 than to the rake face 3 side. In other words, the region where the average thickness of the ⁇ -free layer 9 is c may be located closer to the flank surface 5 than to the rake surface 3. In this case, there is an advantage that the thickness of the ⁇ -free layer 9 on the rake face 3 is increased and the fracture resistance is improved.
  • the width of the intersection region 7 when viewed from the rake face 3 in plan may be larger than the width of the intersection region 7 when viewed from the flank 5 in plan.
  • the advantage is that the radius of curvature of the honing of the rake face 3 is increased, which improves the chipping resistance.
  • WC powder, Co powder, TiC powder, etc. may be prepared as raw material powder.
  • the proportion of Co powder may be 4-12% by weight. Further, the proportion of TiC powder may be 0.5 to 15% by mass. The remainder may be made into WC powder.
  • the average particle size of the raw material powder may be appropriately selected within the range of 0.1 to 10 ⁇ m.
  • the average particle diameter of the raw material powder may be a value measured by the microtrack method.
  • the prepared raw material powders may be mixed and molded to have a rake face 3 and a flank face 5 to obtain a molded body. At this time, it may be preformed by a mold press into a shape in which the intersection ridgeline portion of the rake face 3 and flank face 5 is rounded. In this case, the ⁇ -free layer 9 is likely to be formed on the surface of the intersection region 7. Corner cutting may include forming the intersecting edge portion into a convex curved surface shape or a planar shape.
  • Cemented carbide 1 may be obtained by performing a binder removal treatment on the obtained molded body and then firing it. Firing may be performed in a non-oxidizing atmosphere such as vacuum, argon atmosphere and nitrogen atmosphere.
  • the firing temperature may be 1450 to 1600°C.
  • the firing time may be 0.5 to 3 hours. When firing at such firing temperature and firing time, the ⁇ -free layer 9 is likely to be formed on the surface of the cemented carbide 1.
  • the obtained cemented carbide 1 may be honed to form an intersection region 7 between the rake face 3 and flank face 5. Then, the thickness of the ⁇ -free layer 9 may be adjusted by polishing the intersection region 7 so that the relationship between a and b satisfies b ⁇ a. Polishing may be performed, for example, by brush processing, blasting, barrel processing, or the like.
  • the above manufacturing method is an example of a method for manufacturing cemented carbide 1. Therefore, it goes without saying that the cemented carbide 1 is not limited to that produced by the above manufacturing method.
  • FIGS. 3 and 4 a non-limiting one-sided coated tool 101 according to the present disclosure will be described using FIGS. 3 and 4, taking as an example a case in which the above-mentioned cemented carbide 1 is included.
  • the coated tool 101 may include a cemented carbide 1 and a coating layer 103 located on the surface of the cemented carbide 1, as in a non-limiting example shown in FIGS. 3 and 4.
  • the coated tool 101 may have the cemented carbide 1 as a base.
  • cutting performance such as intermittent performance is likely to be improved because the fracture resistance of the cemented carbide 1 is high. Therefore, the durability of the coated tool 101 is high.
  • the coating layer 103 may be located on the entire surface of the cemented carbide 1, or may be located only on a portion of the surface. That is, the coating layer 103 may be located on at least a portion of the surface of the cemented carbide 1.
  • the covering layer 103 may be formed by a chemical vapor deposition (CVD) method.
  • the covering layer 103 may be a CVD film.
  • the covering layer 103 may be a PVD film formed by a physical vapor deposition (PVD) method.
  • the covering layer 103 may have a single layer structure, or may have a structure in which a plurality of layers are laminated.
  • Examples of the composition of the coating layer 103 include TiCN (titanium carbonitride), Al 2 O 3 (alumina), and TiN (titanium nitride).
  • the coating layer 103 may include a TiCN layer 105 and an Al 2 O 3 layer 107 in this order from the cemented carbide 1, as in a non-limiting example shown in FIG.
  • TiCN layer 105 may be in contact with cemented carbide 1.
  • the Al 2 O 3 layer 107 may be in contact with the TiCN layer 105 .
  • the covering layer 103 may include a TiN layer 109, a TiCN layer 105, and an Al 2 O 3 layer 107 in this order from the cemented carbide 1, as shown in a non-limiting example shown in FIG.
  • TiN layer 109 may be in contact with cemented carbide 1.
  • TiCN layer 105 may be in contact with TiN layer 109.
  • the Al 2 O 3 layer 107 may be in contact with the TiCN layer 105 .
  • the coating layer 103 is not limited to a specific thickness.
  • the thickness of the TiCN layer 105 may be set to about 1.0 to 15 ⁇ m.
  • the thickness of the Al 2 O 3 layer 107 may be set to about 1 to 15 ⁇ m.
  • the thickness of the TiN layer 109 may be set to about 0.1 to 5 ⁇ m.
  • the thickness of the coating layer 103 may be measured by cross-sectional observation using an electron microscope.
  • the thickness of the covering layer 103 may be an average value. For example, the thickness may be measured at ten or more measurement points at intervals of 1 ⁇ m over a width of 10 ⁇ m or more at any position of each layer, and the average value thereof may be calculated.
  • the covered tool 101 may have a through hole 111.
  • the through hole 111 is shown in FIG.
  • the through hole 111 can be used to attach a fixing screw, a clamp member, or the like when the covered tool 101 is held in a holder.
  • the through hole 111 may be formed from the upper surface (rake surface 3) to the lower surface located on the opposite side of the upper surface, or may be open in these surfaces. Note that there is no problem even if the through holes 111 are configured to open in mutually opposing regions on the side surface (flank surface 5).
  • a coating layer 103 may be formed on the surface of the cemented carbide 1 by a CVD method to obtain a coated tool 101.
  • the TiCN layer 105 may be formed as follows. First, as for the reaction gas composition, titanium tetrachloride (TiCl 4 ) gas is 0.1 to 10 volume %, nitrogen (N 2 ) gas is 10 to 60 volume %, and methane (CH 4 ) gas is 0.1 to 15 volume %. %, and the remainder hydrogen (H 2 ) gas. Then, the TiCN layer 105 may be formed by introducing this mixed gas into the chamber and setting the temperature to 800 to 1100° C. and the pressure to 5 to 30 kPa.
  • TiCl 4 titanium tetrachloride
  • N 2 nitrogen
  • CH 4 methane
  • H 2 remainder hydrogen
  • the Al 2 O 3 layer 107 may be formed as follows. First, as the reaction gas composition, aluminum trichloride (AlCl 3 ) gas is 0.5 to 5 volume %, hydrogen chloride (HCl) gas is 0.5 to 3.5 volume %, and carbon dioxide (CO 2 ) gas is 0. A mixed gas consisting of hydrogen sulfide (H 2 S) gas of 0.5 to 5% by volume, 0.5% or less of hydrogen sulfide (H 2 S) gas, and the remainder hydrogen (H 2 ) gas may be prepared. Then, the Al 2 O 3 layer 107 may be formed by introducing this mixed gas into the chamber and setting the temperature to 930 to 1010° C. and the pressure to 5 to 10 kPa.
  • AlCl 3 aluminum trichloride
  • HCl hydrogen chloride
  • CO 2 carbon dioxide
  • the TiN layer 109 may be formed as follows. First, as a reaction gas composition, a mixed gas consisting of 0.1 to 10% by volume of titanium tetrachloride (TiCl 4 ) gas, 10 to 60% by volume of nitrogen (N 2 ) gas, and the remainder hydrogen (H 2 ) gas is used. May be adjusted. Then, the TiN layer 109 may be formed by introducing this mixed gas into the chamber and setting the temperature to 800 to 1010° C. and the pressure to 10 to 85 kPa.
  • TiCl 4 titanium tetrachloride
  • N 2 nitrogen
  • H 2 hydrogen
  • the above manufacturing method is an example of a method for manufacturing the coated tool 101. Therefore, it goes without saying that the coated tool 101 is not limited to that produced by the above manufacturing method.
  • the cutting tool 201 extends from a first end 203a toward a second end 203b, and is located in the holder 203 having a pocket 205 on the side of the first end 203a, as in the non-limiting example shown in FIG.
  • a coated tool 101 may also be provided.
  • the cutting tool 201 includes the coated tool 101, since the coated tool 101 has high durability, the cutting tool 201 has high wear resistance and stable cutting is possible.
  • the pocket 205 may be a portion where the covered tool 101 is attached.
  • the pocket 205 may be open on the outer peripheral surface of the holder 203 and the end surface on the first end 203a side.
  • the covered tool 101 may be installed in the pocket 205 such that the intersection area 7 projects outward from the holder 203. Further, the covered tool 101 may be attached to the pocket 205 by a fixing screw 207. That is, by inserting the fixing screw 207 into the through hole 111 of the covered tool 101 and inserting the tip of the fixing screw 207 into a screw hole formed in the pocket 205 to screw the threaded parts together, the covered tool 101 can be fixed. It may be attached to the pocket 205. At this time, the lower surface of the covered tool 101 may be in direct contact with the pocket 205, or a sheet may be sandwiched between the covered tool 101 and the pocket 205.
  • Examples of the material of the holder 203 include steel and cast iron. When the material of the holder 203 is steel, the holder 203 has high toughness.
  • a cutting tool 201 used for so-called turning is illustrated.
  • Examples of the turning process include inner diameter machining, outer diameter machining, and grooving. Note that the use of the cutting tool 201 is not limited to turning. For example, there is no problem even if the cutting tool 201 is used for milling.
  • the obtained molded body After performing a binder removal treatment on the obtained molded body, it was held at a temperature of 1500°C for 1 hour and fired to obtain a cemented carbide. Then, the obtained cemented carbide was honed to form an intersecting region between the rake face and the flank face.
  • the composition of the obtained cemented carbide was measured by EDS. Specifically, cross-sectional observation was performed using an EDS attached to the SEM, and measurements were made at a magnification of 5,000 to 20,000 times and an average value of measurements at five locations.
  • cemented carbides contained a hard phase containing W and C as main components, a solid solution phase containing W, C, and Ti as main components, and iron as a main component. It had a binder phase containing group metal (Co).
  • sample No. Cemented carbide Nos. 1 to 5 had a ⁇ -free layer consisting only of WC and iron group metal (Co) over the entire surface of the intersection region.
  • the evaluation results are shown in Table 1.
  • the "number of impacts until the cutting edge breaks" in the evaluation results in Table 1 represents the number of impacts until the cutting edge breaks during cutting, and can also be called intermittent performance evaluation. .
  • Sample No. 1 to 4 are sample No.
  • the stability was clearly improved compared to 5 and 6.
  • sample no. No. 6 did not have a ⁇ -removal layer on the surface of the intersection region, had the least number of impacts, had low wear resistance of the cutting edge, and was difficult to stably cut as a cutting tool.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
PCT/JP2023/007459 2022-03-28 2023-03-01 超硬合金およびこれを用いた被覆工具、切削工具 Ceased WO2023189127A1 (ja)

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JP2024511518A JP7801429B2 (ja) 2022-03-28 2023-03-01 被覆工具、および切削工具
US18/851,065 US20250205788A1 (en) 2022-03-28 2023-03-01 Cemented carbide and coated tool and cutting tool each using the same
CN202380028719.3A CN118900926A (zh) 2022-03-28 2023-03-01 硬质合金及使用其的涂层刀具、切削刀具
DE112023001600.3T DE112023001600T5 (de) 2022-03-28 2023-03-01 Hartmetall und beschichtetes werkzeug und schneidwerkzeug unter verwendung davon

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0673560A (ja) * 1992-04-17 1994-03-15 Sumitomo Electric Ind Ltd 被覆超硬合金部材およびその製造方法
JP2003071613A (ja) * 2001-08-31 2003-03-12 Sumitomo Electric Ind Ltd 切削工具
JP2003145312A (ja) * 2001-11-13 2003-05-20 Sumitomo Electric Ind Ltd 被覆超硬合金工具
JP2011251368A (ja) * 2010-06-02 2011-12-15 Mitsubishi Materials Corp 表面被覆超硬合金製切削工具

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7374058B2 (ja) 2020-09-18 2023-11-06 東京エレクトロン株式会社 エッチング方法及びプラズマ処理装置
JP3235259U (ja) 2021-09-28 2021-12-09 コロナ技建株式会社 住宅の二重断熱構造

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0673560A (ja) * 1992-04-17 1994-03-15 Sumitomo Electric Ind Ltd 被覆超硬合金部材およびその製造方法
JP2003071613A (ja) * 2001-08-31 2003-03-12 Sumitomo Electric Ind Ltd 切削工具
JP2003145312A (ja) * 2001-11-13 2003-05-20 Sumitomo Electric Ind Ltd 被覆超硬合金工具
JP2011251368A (ja) * 2010-06-02 2011-12-15 Mitsubishi Materials Corp 表面被覆超硬合金製切削工具

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CN118900926A (zh) 2024-11-05
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DE112023001600T5 (de) 2025-01-23
JP7801429B2 (ja) 2026-01-16

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