WO2018235775A1 - 被覆工具、切削工具及び切削加工物の製造方法 - Google Patents
被覆工具、切削工具及び切削加工物の製造方法 Download PDFInfo
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- WO2018235775A1 WO2018235775A1 PCT/JP2018/023114 JP2018023114W WO2018235775A1 WO 2018235775 A1 WO2018235775 A1 WO 2018235775A1 JP 2018023114 W JP2018023114 W JP 2018023114W WO 2018235775 A1 WO2018235775 A1 WO 2018235775A1
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- layer
- convex portion
- coated tool
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- tool
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- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
- B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
- B23C5/202—Plate-like cutting inserts with special form
-
- 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
-
- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/04—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings of inorganic non-metallic material
- C23C28/044—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings of inorganic non-metallic material coatings specially adapted for cutting tools or wear applications
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2226/00—Materials of tools or workpieces not comprising a metal
- B23C2226/27—Composites, e.g. fibre reinforced composites
Definitions
- This aspect relates to a coated tool used in cutting.
- Patent Document 1 As a coated tool used for cutting such as turning and turning, for example, a coated tool described in JP-A-2009-166216 (Patent Document 1) is known.
- the coated tool described in Patent Document 1 comprises a layer (multilayer film) containing a compound such as titanium (Ti) and a layer containing a compound of titanium, which are located on the surface of a substrate made of cemented carbide or the like.
- a coating layer including (coupling film) and a layer ( ⁇ -type aluminum oxide film) containing ⁇ -type aluminum oxide ( ⁇ -Al 2 O 3 ) is formed.
- the surface of the bonding film has a dendritic shape including dendrites and branch-like protrusions. Since the binding film has a dendritic shape, it is described that the adhesion between the binding film and the ⁇ -type aluminum oxide film is enhanced by the anchor effect.
- both dendrites and branch-like protrusions protrude from the bonding film toward the ⁇ -type aluminum oxide film.
- both dendrite-induced load and branch-induced load caused by the anchor effect are applied to the ⁇ -type aluminum oxide film. Therefore, the durability of the coating layer may be reduced.
- a coated tool comprises a substrate having a first surface and a coated layer located on the first surface.
- the covering layer has a first layer containing aluminum oxide located on the first surface, and a second layer containing a titanium compound located on the first layer and in contact therewith. There is. Further, in a cross section orthogonal to the first surface, the first layer has a first convex portion protruding toward the second layer and a first concave portion positioned in the first convex portion, and The second layer has a second concave portion engaged with the first convex portion and a second convex portion engaged with the first concave portion.
- FIG. 2 is a cross-sectional view of the coated tool shown in FIG. It is an enlarged view of the coating layer vicinity in the coating tool shown in FIG. It is an enlarged view in area
- the coated tool 1 according to the embodiment will be described in detail with reference to the drawings.
- the respective drawings referred to in the following show only main members necessary for describing the following embodiment in a simplified manner.
- the coated tool 1 may comprise any component not shown in the figures to which it refers.
- the dimensions of the members in the respective drawings do not faithfully represent the dimensions of the actual constituent members, the dimensional ratio of the respective members, and the like.
- the coated tool 1 includes a base 3 and a cover layer 5 as shown in FIGS. 1 and 2.
- the base 3 in the example shown in FIG. 2 includes the first surface 7 (upper surface in FIG. 2), the second surface 9 (side surface in FIG. 2) adjacent to the first surface 7, the first surface 7 and the second surface 9 And a cutting edge 11 located on at least a part of the ridge line where the two intersect.
- the base 3 in the example shown in FIG. 1 has a square plate shape, and the first surface 7 is a square. Therefore, the number of second surfaces 9 is four.
- the coated tool 1 of the example at least a part of the first surface 7 is a rake surface area, and at least a part of the second surface 9 is a flank surface area.
- the shape of the base 3 is not limited to the square plate shape.
- the first surface 7 may be triangular, pentagonal, hexagonal or circular.
- the base 3 is not limited to a plate shape, and may be, for example, a pillar shape.
- the covering layer 5 is located on at least the first surface 7 of the substrate 3.
- the covering layer 5 may be located only on the first surface 7 or may be located on another surface of the base 3 other than the first surface 7.
- the covering layer 5 is located on the second surface 9 in addition to the first surface 7.
- the covering layer 5 is provided to improve the characteristics such as the abrasion resistance and the chipping resistance of the covering tool 1 in cutting.
- the covering layer 5 in the example shown in FIG. 3 has a first layer 13 and a second layer 15.
- the first layer 13 is located on the first surface 7 and contains aluminum oxide (Al 2 O 3 ).
- the second layer 15 is positioned on and in contact with the first layer 13 and contains a titanium compound.
- the first layer 13 may contain aluminum oxide as a main component.
- the second layer 15 may contain a titanium compound as a main component.
- said "main component” means that it is a component with the largest value of mass% compared with another component.
- the first layer 13 may contain a component other than aluminum oxide
- the second layer 15 may contain a component other than a titanium compound.
- the bonding property of the first layer 13 and the second layer 15 is high.
- the bonding property of the first layer 13 and the second layer 15 is high.
- Examples of aluminum oxide contained in the first layer 13 include ⁇ -alumina ( ⁇ -Al 2 O 3 ), ⁇ -alumina ( ⁇ -Al 2 O 3 ), and ⁇ -alumina ( ⁇ -Al 2 O 3). Can be mentioned. Among these, when the first layer 13 contains the largest amount of ⁇ -alumina, the heat resistance of the coated tool 1 is high.
- the first layer 13 may be configured to contain only any one of the above-described compounds, or may be configured to include a plurality of the above-described compounds.
- Whether the aluminum oxide contained in the first layer 13 is any of the above-described compounds can be evaluated by, for example, X-ray diffraction (XRD) analysis and comparison with a JCPDS card.
- XRD X-ray diffraction
- the above-mentioned ⁇ -alumina, ⁇ -alumina and ⁇ -alumina may be contained in the first layer 13 in any state, for example, extending from the side of the substrate 3 toward the second layer 15
- the first layer 13 may be provided in the state of the plurality of columnar crystals 13 a.
- Examples of the titanium compound contained in the second layer 15 include carbides, nitrides, oxides, carbonitrides, carbooxides and oxycarbonitrides of titanium.
- the second layer 15 may be configured to contain only any one of the above-described compounds, or may be configured to include a plurality of the above-described compounds.
- the boundary between the first layer 13 and the second layer 15 can be identified, for example, by observing a scanning electron microscope (SEM) photograph or a transmission electron microscope (TEM) photograph. It is.
- SEM scanning electron microscope
- TEM transmission electron microscope
- the interface on the side where the first layer 13 joins with the second layer 15 (upper interface in FIG. 4)
- the first convex portion 17 protruding toward the second layer 15 and the first concave portion 19 positioned on the first convex portion 17 are provided.
- the second layer 15 engages with the first concave portion 21 and the second concave portion 21 engaged with the first convex portion 17 at the interface (lower interface in FIG. 4) on the side where the second layer 15 is joined to the first layer 13.
- the second convex portion 23 to be fitted to be fitted.
- the first convex portion 17 protrudes toward the second layer 15, and the second convex portion 23 protrudes toward the first layer 13. Therefore, due to the anchor effect, the bonding property to the second layer 15 by the first convex portion 17 is high, and the bonding property to the first layer 13 by the second convex portion 23 is high.
- the coated tool 1 provided with the above-described coated layer 5 has high bondability and high durability due to the anchor effect.
- the size of the first convex portion 17 and the second convex portion 23 is not limited to a specific numerical value.
- the maximum height of the interface of the first surface 7 located on the second surface 9 side is Rz in a cross section orthogonal to the first surface 7
- the height of the first convex portion 17 is Rz / 10 or more
- the height of the second convex portion 23 may be set to less than Rz / 10.
- the length of a first virtual straight line connecting a pair of base ends of the convex portion in the cross-sectional view is taken as the width W of the convex portion.
- the length of the second virtual straight line which is orthogonal to the first virtual straight line and which passes through the apexes of the first virtual straight line and the convex portion is taken as the height H of the convex portion.
- the first convex portion 17 is It is larger than 2 convex part 23. Specifically, the width W1 of the first convex portion 17 is larger than the width W2 of the second convex portion 23, and the height H1 of the first convex portion 17 is larger than the height H2 of the second convex portion 23. . Thereby, the durability of the coated tool 1 is high.
- the load due to the anchor effect is more greatly applied to the second concave portion 21 than the first concave portion 19.
- the second layer 15 is positioned on and in contact with the first layer 13. Therefore, even if a crack is caused in the second recess 21 in the direction away from the first layer 13 due to the load due to the anchor effect, this load can be released on the surface of the covering layer 5.
- the load caused by the anchor effect applied to the first recess 19 is relatively small, it is difficult for the first recess 19 to crack in the direction away from the second layer 15, in other words, in the direction toward the inside of the coated tool 1 . As described above, since the crack is difficult to progress deeply, the durability of the coated tool 1 is high.
- the covering layer 5 is not limited to the structure having only the first layer 13 and the second layer 15, and may have layers other than the first layer 13 and the second layer 15.
- the covering layer 5 may have a third layer 25 located between the base 3 and the first layer 13 in addition to the first layer 13 and the second layer 15. .
- the third layer 25 in the example shown in FIG. 3 contains a titanium compound.
- a titanium compound contained in the 3rd layer 25 a carbide, a nitride, an oxide, a carbonitride, a carbon oxide, and an oxycarbonitride of titanium are mentioned like the 2nd layer 15, for example.
- the third layer 25 may have a single layer configuration, or may have a configuration in which a plurality of layers are stacked.
- the third layer 25 is located on the side of the base 3, the layer 25 b containing titanium nitride (TiN) and the layer containing titanium carbonitride (TiCN) located on the side of the first layer 13. 25a may be located in order.
- the bonding property of the base 3 and the covering layer 5 is high.
- the bonding property of the third layer 25 and the first layer 13 is high.
- Elemental analysis of the components contained in each layer of the first layer 13, the second layer 15, and the third layer 25 can be performed by, for example, SEM-EDX using an energy dispersive X-ray spectrometer (EDX) attached to a scanning electron microscope. It can be evaluated by a method or analysis using an electron beam microanalyzer (EPMA).
- EDX energy dispersive X-ray spectrometer
- EPMA electron beam microanalyzer
- the number of the first convex portions 17 and the second convex portions 23 in the first layer 13 is not particularly limited, and may be one or more. It may be In the above-described cross section, when the first layer 13 has a plurality of first convex portions 17, the bonding property by the anchor effect is high.
- the bonding property of the first layer 13 and the second layer 15 is further enhanced.
- the durability of the first layer 13 and the second layer 15 is further enhanced.
- the anchor effect by one first convex portion 17 is larger than the anchor effect by one second convex portion 23.
- the anchor effect by the second convex portion 23 with respect to the first convex portion 17 per one is high. Therefore, the bondability of the first layer 13 and the second layer 15 is further enhanced, and the durability of the first layer 13 and the second layer 15 is further enhanced.
- the direction in which the first convex portion 17 and the second convex portion 23 protrude in the cross section orthogonal to the first surface 7 is not limited to a specific direction.
- the load due to the anchor effect in the first convex portion 17 And the load by the anchor effect in the 2nd convex part 23 is easy to be distributed. Therefore, the durability of the covering layer 5 is high.
- the direction in which the first convex portion 17 protrudes With respect to the direction in which the first convex portion 17 protrudes, the direction in which the line connecting the middle point of the straight line connecting the two base ends 17 b and the tip end 17 a is the protruding direction. Similarly, with respect to the direction in which the second convex portion 23 protrudes, the direction in which the line connecting the middle point of the straight line connecting the two base ends 23 b and the tip end 23 a is the protruding direction.
- the 1st layer 13 may be equipped with said several columnar crystal 13a. Further, in the cross section orthogonal to the first surface 7, as shown in FIG. 5, the base end 17b of the first convex portion 17 may be located at the boundary 13b of the columnar crystals 13a adjacent to each other. A relatively large load is likely to be applied to the proximal end 17b of the first convex portion 17, but if the proximal end 17b of at least one first convex portion 17 is located at the above location, this first convex portion The crack is less likely to progress from the base end 17b of 17 toward the inside of the columnar crystal 13a. Therefore, the durability of the first layer 13 is high.
- the tip end 23a of at least one second convex portion 23 may be located at the boundary 13b of the columnar crystals 13a adjacent to each other.
- a relatively large load is likely to be applied to the bottom of the first recess 19 engaged with the tip 23a of the second protrusion 23.
- the tip 23a of the second protrusion 23 is located at the above location, The crack is less likely to progress from the bottom of the first recess 19 toward the inside of the columnar crystal 13a. Therefore, the durability of the first layer 13 is high.
- the extending direction of the second convex portion 23 may be inclined with respect to the extending direction (vertical direction in FIG. 5) of the columnar crystal 13a.
- the recessed direction of the first concave portion 19 engaged with the second convex portion 23 is inclined with respect to the extending direction of the columnar crystal 13 a.
- the direction in which the load applied from the second convex portion 23 to the first concave portion 19 is inclined with respect to the direction in which the columnar crystals 13a extend, so cracks occur at the boundaries 13b of the columnar crystals 13a adjacent to each other. It is hard to occur.
- Examples of the material of the base 3 include inorganic materials such as cemented carbide, cermet, and ceramics.
- the material of the base 3 is not limited to these.
- composition of the cemented carbide examples include WC (tungsten carbide) -Co (cobalt), WC-TiC (titanium carbide) -Co and WC-TiC-TaC (tantalum carbide) -Co.
- WC, TiC and TaC are hard particles
- Co is a binder phase.
- cermet is a sintered composite material in which a ceramic component is compounded with a metal.
- examples of the cermet include compounds containing TiCN, TiC or TiN as a main component.
- the base 3 may have a through hole 27 passing through the first surface 7 and a surface (lower surface in FIG. 1) located on the opposite side of the first surface 7.
- the through hole 27 can be used to insert a fixing member for fixing the covering tool 1 to the holder.
- a fixing member a screw and a clamp member are mentioned, for example.
- the size of the substrate 3 is not particularly limited.
- the length of one side of the first surface 7 may be set to about 3 to 20 mm.
- the height from the first surface 7 to the surface located on the opposite side of the first surface 7 may be set to about 5 to 20 mm.
- metal powder, carbon powder and the like are appropriately added and mixed to an inorganic powder selected from carbides, nitrides, carbonitrides, oxides, etc. which can form a hard alloy to be the substrate 3 by firing, and mixed powder Make
- a molded body is produced by molding the mixed powder into a predetermined tool shape using a known molding method. Examples of the molding method include press molding, cast molding, extrusion molding and cold isostatic press molding.
- the base 3 is produced by baking the above-mentioned molded body in vacuum or in a non-oxidative atmosphere. The surface of the base 3 may be subjected to polishing and honing as required.
- the covering layer 5 is formed on the surface of the substrate 3 by a chemical vapor deposition (CVD) method.
- CVD chemical vapor deposition
- the first layer 13 can be formed by the following method. Hydrogen (H 2 ) gas, 5% by volume to 15% by volume of aluminum trichloride (AlCl 3 ) gas, 0.5% by volume to 2.5% by volume of hydrogen chloride (HCl) gas, and 0.5% by volume A first mixed gas is produced by mixing% to 5.0% by volume of carbon dioxide (CO 2 ) gas and 1% by volume or less of hydrogen sulfide (H 2 S) gas. The first mixed gas is introduced into the chamber under the conditions of a film forming temperature of 950 ° C. to 1100 ° C. and a gas pressure of 5 kPa to 20 kPa. Thereby, the first layer 13 in the covering layer 5 can be formed.
- Hydrogen (H 2 ) gas Hydrogen (H 2 ) gas
- AlCl 3 aluminum trichloride
- HCl hydrogen chloride
- a first mixed gas is produced by mixing% to 5.0% by volume of carbon dioxide (CO 2 ) gas and 1% by volume or less of hydrogen
- the second layer 15 can be formed by the following method.
- a second mixed gas is produced by mixing 0.1 to 10% by volume of titanium tetrachloride (TiCl 4 ) gas and 10 to 60% by volume of nitrogen (N 2 ) gas with hydrogen gas.
- the second mixed gas is introduced into the chamber under the conditions of a film forming temperature of 960 to 1100 ° C. and a gas pressure of 10 to 85 kPa. Thereby, the second layer 15 in the covering layer 5 can be formed.
- the substrate 3 covered with the first layer 13 is removed from the chamber and the first layer 13 is surface processed.
- the first layer 13 having the first convex portion 17 and the first concave portion 19 can be formed.
- the above-mentioned surface processing is not limited to a specific processing, for example, blast processing, laser processing, etching processing, etc. are mentioned.
- the first convex portion 17 is formed, and the first convex portion 17 is formed on the surface of the first layer 13. Blasting may be performed by spraying particles having a particle diameter smaller than the height of the convex portion 17 to form the first concave portion 19.
- the third layer 25 can be formed by the following method.
- hydrogen gas is mixed with 0.5 to 10% by volume of titanium tetrachloride gas and 10 to 60% by volume of nitrogen gas to prepare a third mixed gas.
- the third mixed gas is introduced into the chamber under the conditions of a film forming temperature of 800 to 940 ° C. and a gas pressure of 8 to 50 kPa.
- the titanium nitride-containing layer 25 b of the third layer 25 can be formed.
- hydrogen gas is mixed with 0.5 to 10% by volume of titanium tetrachloride gas, 5 to 60% by volume of nitrogen gas, and 0.1 to 3% by volume of acetonitrile (CH 3 CN) gas.
- a fourth mixed gas is prepared.
- the fourth mixed gas is introduced into the chamber under the conditions of a film forming temperature of 780 to 880 ° C. and a gas pressure of 5 to 25 kPa. Thereby, the layer 25 a containing titanium carbonitride in the third layer 25 can be formed.
- the portion of the surface of the coated layer 5 on which the cutting edge 11 is located is polished.
- welding of the material to be cut to the cutting blade 11 is easily suppressed, so that the coated tool 1 having excellent fracture resistance is obtained.
- said manufacturing method is an example of the method of manufacturing the coated tool 1 of embodiment. Therefore, it goes without saying that the coated tool 1 is not limited to one manufactured by the above-described manufacturing method.
- the cutting tool 101 in one example shown in FIGS. 6 and 7 is a rod-like body extending from the first end (upper end in FIG. 6) to the second end (lower end in FIG. 6). It has the holder 105 which has it, and the above-mentioned covering tool 1 located in the pocket 103.
- the pocket 103 is a portion to which the coated tool 1 is attached, and has a seating surface parallel to the lower surface of the holder 105 and a constraining side surface inclined to the seating surface. Further, the pocket 103 is open at the first end side of the holder 105.
- the coated tool 1 is located in the pocket 103. At this time, the surface opposite to the first surface of the coated tool 1 may be in direct contact with the pocket 103, or a sheet may be sandwiched between the coated tool 1 and the pocket 103.
- the coated tool 1 is mounted such that the portion used as the cutting edge in the ridge line protrudes outward from the holder 105.
- the coated tool 1 is attached to the holder 105 by means of a screw 107. That is, the covering tool 1 is inserted by inserting the screw 107 into the through hole of the covering tool 1 and inserting the tip of the screw 107 into a screw hole (not shown) formed in the pocket 103 and screwing the screw parts together. Is attached to the holder 105.
- the holder 105 steel, cast iron or the like can be used. In particular, when steel is used among these members, the toughness of the holder 105 is high.
- a cutting tool used for so-called turning is illustrated.
- Examples of turning include inner diameter machining, outer diameter machining and grooving.
- the cutting tool is not limited to one used for turning.
- the coated tool 1 of the above embodiment may be used for a cutting tool used for milling.
- the machined product is manufactured by cutting the work material 201.
- the method of manufacturing a machined product according to the embodiment includes the following steps. That is, (1) a step of rotating the work material 201; (2) bringing the cutting material 101 represented by the above-described embodiment into contact with the rotating workpiece 201; (3) releasing the cutting tool 101 from the work material 201; Is equipped.
- the work material 201 is rotated about the axis O2, and the cutting tool 101 is relatively brought close to the work material 201.
- the cutting edge of the cutting tool 101 is brought into contact with the material to be cut 201 to cut the material to be cut 201.
- the cutting tool 101 is relatively moved away from the work material 201.
- the cutting tool 101 is moved in the Y1 direction in a state in which the axis O2 is fixed and the work material 201 is rotated around the axis O2, thereby bringing the work material 201 closer. Further, in the example shown in FIG. 9, the work material 201 is cut by bringing the cutting edge of the insert 1 into contact with the work material 201 being rotated. Further, in the example shown in FIG. 10, the cutting tool 101 is moved in the Y2 direction in a state in which the work material 201 is rotated to move it away.
- the cutting tool 101 is brought into contact with the work material 201 or the cutting tool 101 is separated from the work material 201 by moving the cutting tool 101 in each process.
- the cutting tool 101 is not limited to such a form.
- the work material 201 may be brought close to the cutting tool 101.
- the work material 201 may be moved away from the cutting tool 101.
- the process of keeping the work material 201 rotated and keeping the cutting blade of the insert 1 in contact with different places of the work material 201 may be repeated.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Chemical Vapour Deposition (AREA)
Abstract
Description
実施形態の被覆工具1は、図1及び図2に示すように、基体3及び被覆層5を備えている。図2に示す一例における基体3は、第1面7(図2における上面)と、第1面7と隣り合う第2面9(図2における側面)と、第1面7及び第2面9が交わる稜線の少なくとも一部に位置する切刃11とを有している。
次に、実施形態に係る被覆工具1の製造方法について説明する。
次に、実施形態の切削工具101について図面を用いて説明する。
次に、実施形態の切削加工物の製造方法について図面を用いて説明する。
(1)被削材201を回転させる工程と、
(2)回転している被削材201に上記の実施形態に代表される切削工具101を接触させる工程と、
(3)切削工具101を被削材201から離す工程と、
を備えている。
3・・・基体
5・・・被覆層
7・・・第1面
9・・・第2面
11・・・切刃
13・・・第1層
13a・・柱状結晶
15・・・第2層
17・・・第1凸部
17a・・先端
17b・・基端
19・・・第1凹部
21・・・第2凹部
23・・・第2凸部
23a・・先端
25・・・第3層
27・・・貫通孔
101・・・切削工具
103・・・ポケット
105・・・ホルダ
107・・・固定ネジ
201・・・被削材
Claims (9)
- 第1面を有する基体と、前記第1面の上に位置する被覆層とを備えた被覆工具であって、
前記被覆層は、前記第1面の上に位置する、酸化アルミニウムを含有する第1層と、該第1層の上に接して位置する、チタン化合物を含有する第2層とを有し、
前記第1面に直交する断面において、前記第1層が、前記第2層に向かって突出する第1凸部と、該第1凸部に位置する第1凹部とを有するとともに、前記第2層が、前記第1凸部と係合する第2凹部と、前記第1凹部に係合する第2凸部とを有している、被覆工具。 - 前記第1面に直交する断面において、1つの第1凸部に前記第1凹部が複数位置している、請求項1に記載の被覆工具。
- 前記第1面に直交する断面において、前記第2凸部が突出する方向が、前記第1凸部が突出する方向に対して傾斜している、請求項1又は2に記載の被覆工具。
- 前記第1面に直交する断面において、1つの第1凸部に前記第1凹部が複数位置しており、
複数の前記第1凹部のうち少なくとも1つが、前記基体から離れる方向に向かって窪んでいる、請求項3に記載の被覆工具。 - 前記第1層は、前記基体の側から前記第2層に向かってそれぞれ延びた複数の柱状結晶を備え、
前記第1面に直交する断面において、前記第1凸部の基端が、互いに隣り合う前記柱状結晶の境界に位置している、請求項1~4のいずれか1つに記載の被覆工具。 - 前記第1層は、前記基体の側から前記第2層に向かってそれぞれ延びた複数の柱状結晶を備え、
前記第1面に直交する断面において、前記第2凸部の先端が、互いに隣り合う前記柱状結晶の境界に位置している、請求項1~5のいずれか1つに記載の被覆工具。 - 互いに隣り合う前記柱状結晶の境界に先端が位置する前記第2凸部の突出する方向は、前記柱状結晶の延びた方向に対して傾斜している、請求項6に記載の被覆工具。
- 先端側に位置するポケットを有するホルダと、
前記ポケット内に位置する、請求項1~7のいずれか1つに記載の被覆工具とを有する切削工具。 - 請求項8に記載の切削工具を回転させる工程と、
回転している前記切削工具を被削材に接触させる工程と、
前記切削工具を前記被削材から離す工程とを備えた切削加工物の製造方法。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16/624,915 US11839923B2 (en) | 2017-06-21 | 2018-06-18 | Coated tool, cutting tool, and method for manufacturing machined product |
| DE112018003209.4T DE112018003209B4 (de) | 2017-06-21 | 2018-06-18 | Beschichtetes Werkzeug, Schneidwerkzeug und Herstellungsverfahren eines maschinell bearbeiteten Produkts |
| CN201880041766.0A CN110769957B (zh) | 2017-06-21 | 2018-06-18 | 涂层刀具、切削刀具和切削加工物的制造方法 |
| JP2019525607A JP6977034B2 (ja) | 2017-06-21 | 2018-06-18 | 被覆工具、切削工具及び切削加工物の製造方法 |
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| JP2017-121283 | 2017-06-21 | ||
| JP2017121283 | 2017-06-21 |
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| WO2018235775A1 true WO2018235775A1 (ja) | 2018-12-27 |
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| PCT/JP2018/023114 Ceased WO2018235775A1 (ja) | 2017-06-21 | 2018-06-18 | 被覆工具、切削工具及び切削加工物の製造方法 |
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| JP (1) | JP6977034B2 (ja) |
| CN (1) | CN110769957B (ja) |
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| WO (1) | WO2018235775A1 (ja) |
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| Publication number | Publication date |
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| CN110769957A (zh) | 2020-02-07 |
| JPWO2018235775A1 (ja) | 2020-04-16 |
| CN110769957B (zh) | 2021-02-26 |
| US20210031280A1 (en) | 2021-02-04 |
| JP6977034B2 (ja) | 2021-12-08 |
| US11839923B2 (en) | 2023-12-12 |
| DE112018003209T5 (de) | 2020-03-19 |
| DE112018003209B4 (de) | 2025-08-07 |
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