WO2005000508A1 - 工具用表面被覆高硬度材料 - Google Patents
工具用表面被覆高硬度材料 Download PDFInfo
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- WO2005000508A1 WO2005000508A1 PCT/JP2004/008873 JP2004008873W WO2005000508A1 WO 2005000508 A1 WO2005000508 A1 WO 2005000508A1 JP 2004008873 W JP2004008873 W JP 2004008873W WO 2005000508 A1 WO2005000508 A1 WO 2005000508A1
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- coating film
- tool
- cutting
- hardness material
- coated high
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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
- C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
- C23C30/005—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process on hard metal substrates
-
- 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
- B23B27/04—Cutting-off tools
-
- 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
- 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
- B23B27/18—Cutting tools of which the bits or tips or cutting inserts are of special material with cutting bits or tips or cutting inserts rigidly mounted, e.g. by brazing
- B23B27/20—Cutting tools of which the bits or tips or cutting inserts are of special material with cutting bits or tips or cutting inserts rigidly mounted, e.g. by brazing with diamond bits or cutting inserts
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5053—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials non-oxide ceramics
- C04B41/5062—Borides, Nitrides or Silicides
- C04B41/5068—Titanium nitride
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/87—Ceramics
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/89—Coating or impregnation for obtaining at least two superposed coatings having different compositions
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
- B23B2222/28—Details of hard metal, i.e. cemented carbide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2224/00—Materials of tools or workpieces composed of a compound including a metal
- B23B2224/32—Titanium carbide nitride (TiCN)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2226/00—Materials of tools or workpieces not comprising a metal
- B23B2226/12—Boron nitride
- B23B2226/125—Boron nitride cubic [CBN]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2226/00—Materials of tools or workpieces not comprising a metal
- B23B2226/31—Diamond
- B23B2226/315—Diamond polycrystalline [PCD]
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/252—Glass or ceramic [i.e., fired or glazed clay, cement, etc.] [porcelain, quartz, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
- Y10T428/264—Up to 3 mils
- Y10T428/265—1 mil or less
Definitions
- the present invention relates to an improvement of a tool material comprising a CBN sintered body mainly composed of cubic boron nitride (CBN) as a base material and a thin film coated thereon.
- CBN cubic boron nitride
- CBN is a material having the second highest hardness next to diamond and has low reactivity with metal
- its sintered body is used for cutting heat-resistant alloys and hardened steel.
- coating has the effect of preventing wear of the cutting edge.
- the coating film has roundness at the edge of the cutting edge, and the larger the film thickness, the larger the roundness.
- Patent Document 1 discloses a coated CBN sintered body having a wear-resistant layer, an intermediate layer and an outermost surface layer on the CBN sintered body.
- a surface-coated high-hardness material for a tool which is coated with an intermediate layer (such as TiAl (CNO) as an abrasion-resistant layer) and as an outermost surface layer, is provided.
- an intermediate layer such as TiAl (CNO) as an abrasion-resistant layer
- Patent Document 2 discloses a CBN sintered body having a coating film of a composite nitride containing titanium and aluminum, a composite carbonitride, or the like.
- the ratio of the X-ray diffraction intensity of the crystal plane (200) to the X-ray diffraction intensity of the crystal plane (111) is in a specific range, and the thickness force of the coating film S1—15 ⁇ m It is a composite hard film covering member.
- Patent Document 1 JP-A-8-119774, page 2, pages 6-10, Tables 1, 3, 5 Patent Document 2: JP-A-2001-234328, page 2
- the conventional coating tool had a coating film thickness of 1 ⁇ m or more. Recently, it has become necessary to extend the service life of interrupted cutting of quenched steel, etc., and to increase the precision of precision finishing. Life has not been obtained. In intermittent cutting, if the thickness of the ceramic coating film, which is inferior to that of the CBN sintered body, is large, the film will peel off due to the intermittent impact. It causes the roughness to deteriorate. Also, as the feed amount approaches the coating film thickness, As a result, the ratio of cutting at a portion where there is no base material under the coating film increases, and the peeling of the coating film easily occurs.
- coated cemented carbide tools are intended for high-efficiency machining with a large cutting depth and feed rate, rather than high-precision machining. Therefore, the occurrence of film peeling due to a high cutting load becomes a problem.
- a high-precision finished surface can be obtained. According to the knowledge obtained by the inventors, even in low-feed processing, film separation is likely to occur due to a high specific cutting resistance (a value obtained by dividing a cutting resistance by a cutting cross-sectional area).
- the present invention relates to a method for producing a CBN sintered body, wherein at least one element selected from C, N and 0 and at least one element selected from the group consisting of Ti and A1
- This is a surface-hardened material for tools with at least one layer of a coating film consisting of a compound mainly composed of the following elements and having a thickness of 0.1 ⁇ m or more and less than 1 ⁇ m.
- the surface hardened material for a tool according to the present invention has a wear-resistant layer made of TiAl (CN ⁇ ) as a coating film.
- an intermediate layer made of TiN or the like and an outermost surface layer may be provided.
- the coating film of the present invention is composed of ⁇ and A1 nitrides or carbonitrides.
- the X-ray diffraction of the coating film has a diffraction intensity from the (111) plane of the 1 (111) or (200) plane. Assuming that the diffraction intensity from the light is 1 (200), it is preferable that 0 ⁇ 1 (200) / 1 (111) ⁇ 3. Diffraction intensity depends on film formation conditions.If force 1 (200) / I (111) exceeds 3, compressive stress decreases and crystal grains become coarse. To reduce the wear resistance and fracture resistance, it was set to 3 or less.
- the coating film of the present invention which is thinner than the conventional film, was (Ti A1) N, 0.3 ⁇ X
- the ⁇ 1 ⁇ coating film has a larger thermal expansion coefficient than the CBN base material, tensile stress is generated inside the coating film due to the difference in the respective shrinkage rates during cooling after the film formation is completed, and the residual stress generated during film formation Compressive stress is reduced.
- the thermal expansion coefficient of the coating film decreases as the ratio of A1 in the coating film increases, and when X exceeds 0.6, the compressive stress relaxation effect due to the difference in thermal expansion coefficient with the CBN substrate , The high compressive stress inside the film remains, and the film is easily peeled during cutting.
- This range has an excellent balance between wear resistance and peel resistance, and is a composition suitable for intermittent cutting and grooving force. It was found that more preferably 0.3 ⁇ X ⁇ 0.45.
- the average particle size of the crystals constituting the coating film of the present invention is desirably 50 or more and 150 or less. In general, it is considered that as the crystal grain size becomes finer, the hardness of the film increases while the toughness decreases. The above range is excellent in the balance between wear resistance and fracture resistance, and is suitable for intermittent cutting and grooving. Crystal grain size.
- a part of Ti contained in the coating film is replaced with at least one element selected from transition metal elements of Group 4a, 5a and 6a except for Si, B and Ti, It is desirable that the content of the substituted element in the coating film be less than 10% in atomic%.
- the third element as described above in addition to Ti and A1 the particle size of the crystal grains constituting the coating film is further reduced, and a uniform crystal structure is obtained, improving the strength of the film. Because you do.
- a remarkable effect is obtained when the surface-coated high-hardness material for a tool of the present invention is used as a grooving tool.
- the feed rate is originally low, and the feed rate is zero at the bottom of the groove, and a large stress is applied to the coating film. Since the coating film of the present invention is thin, it can withstand the high stress peculiar to the grooving described above.
- the base material used in the present invention is a sintered body composed of 30 to 90% by volume of CBN powder and the balance binder, wherein the balance binder is a nitride of an element from Groups 4a, 5a and 6a of the periodic table; At least one selected from the group consisting of carbides, borides, oxides, and solid solutions thereof; It consists of a norenium compound and unavoidable impurities.
- the A1 compound includes aluminum oxide, boride, nitride and the like.
- Various known CBN sintered bodies The above-mentioned base material is suitable for cutting hardened steel.
- the thickness of the coating film is 0.1 ⁇ m or more and less than 0.5 ⁇ m.
- the feed amount during cutting can be reduced, enabling high-precision machining.
- High-precision machining in the present invention refers to machining with a feed amount of 0.08 mm / rev or less.
- the thickness of the coating film refers to the total thickness of various layers such as the intermediate layer, the wear-resistant layer, and the outermost layer.
- the cutting tool made of the tool surface-coated high-hardness material of the present invention can be used not only as a dry tool but also as a wet tool.
- dry cycle is preferable from the viewpoint of tool life, where the thermal cycle is remarkable.
- Wet processing is sometimes desirable from the viewpoint of force dimensional accuracy.
- the thermal expansion coefficient of the CBN base material and that of the hard coating film are different, so that the conventional film does not have sufficient wear control effect due to the intermittent impact, film peeling and film destruction due to thermal cycling in addition to intermittent impact.
- the present invention while applying compressive stress, the present invention not only enhances the fracture resistance of the film itself, but also suppresses the total stress depending on the thermal stress generated by thermal cycling by reducing the film thickness.
- the peel resistance is greatly improved. For this reason, even in intermittent cutting under wet conditions, a sufficient abrasion control effect can be obtained that prevents film destruction and film peeling.
- the surface-coated high-hardness material for a tool of the present invention covers a CBN sintered body having excellent strength, hardness and toughness with a hard coating film having excellent hardness and heat resistance thinner than a conventional film. This has greatly improved the peeling resistance and fracture resistance.
- FIG. 3 is a cross-sectional view taken along the line AA of the work material in FIG. 2, showing a state in which a groove of the work material is cut using a grooving tool made of the material of the present invention.
- the feed during cutting must be reduced.
- a portion having a width corresponding to the feed F is removed as chips 5 to form a groove wall 6.
- the thickness of the portion to be removed as the cutting powder soon approaches the thickness of the coating film 2.
- the ratio of the load applied to the coating film 2 increases, which causes the coating film 2 to peel off.
- the ratio of the load applied to the substrate 1 can be increased even with the same feed F, and peeling of the coating film can be suppressed.
- the grooving tool of the present invention has no problem such as film peeling or film deficiency because the thickness of the coating film is thin.
- the coating film of the present invention is coated by, for example, a PVD method, but at that time, electric charges are easily collected on the cutting edge, so that the rounding of the cutting edge cannot be prevented.
- the load applied to the portion with roundness 4 is so large that the membrane is easily damaged.
- the coating film of the present invention can be formed by a PVD method such as ion plating.
- the method for forming a coating film according to the present invention can provide a coating film having high reactivity with a high ionization rate of the raw material elements and excellent adhesion by applying a bias voltage to the substrate.
- the ion plating method is most suitable.
- the bias voltage indicates a potential difference between the base material and the metal target.
- a constituent material of a coating film is accelerated by a bias voltage. That is, by applying a negative bias to the substrate, the ionized metal cations are accelerated, reach the substrate surface, and the film grows.
- the relationship between the bias voltage and the residual stress is disclosed in Fig. 7 of the reference Surface and Coatings Technology vol.163-164 pl35_143 (2003) .In this reference, the residual compressive stress increases as the bias voltage increases, and 100 V Indicates that the maximum value is reached, and above that value, the residual compressive stress decreases.
- the term “high bias voltage” means that the absolute value of the negative bias voltage applied to the base material is large, and is expressed as an absolute value in Table 8 and FIG. ing.
- the bias voltage is increased, the accelerated cation bombardment effect on the substrate is increased and the compressive stress is increased, but at the same time, the temperature of the substrate and the coating film is also increased, so that stress relaxation works. The compression stress tends to decrease from the bias voltage.
- the coating film of the present invention (coating composition: (TiAl) N, film thickness: 0.45 ⁇ ) has a residual voltage of 200 V with a bias voltage of 200 V as shown in FIG. And the absolute value of the residual compressive stress is larger than that in the above document.
- the reason is presumed as follows.
- the thermal conductivity of the CBN substrate is much larger than the thermal conductivity of the coating film, and has the function of releasing the heat generated in the coating film during film formation, but its heat dissipation effect depends on the film thickness.
- the heat dissipation effect is excellent, so that the stress relaxation effect due to the temperature rise of the coating film becomes small and the compressive stress becomes high. This means that a higher compressive stress can be applied by making the coating thinner.
- the substrate is a CBN sintered body with a film thickness of lxm or more, the adhesion strength is higher than that of a cemented carbide or cermet.
- the bias voltage is increased, the total stress inside the film increases. Since the coating film peeled off during cutting, it was usually formed at 100 V or less.
- the bias voltage used in the present invention is in the range of 100V to 300V.
- the coating film of the present invention may be a single layer or multiple layers. However, when the outermost surface layer is provided, TiN, TiCN, CrN, TiC, HfC or the like is desirable. This is because, while the CBN sintered body is black, the film exhibits a bright bright color. When using the coated CBN sintered tool of the present invention provided with the outermost surface layer in mass production, it is easy to distinguish between tools or corners that have reached the end of life and unused tools or corners, and tool management is easy. Because it can be thorough.
- a binder powder in which TiN and aluminum were mixed at a weight ratio of 80:20 was obtained.
- this binder and CBN powder were blended in a volume ratio of 40:60, filled in a Mo container, and sintered at a pressure of 50 kb (5 GPa) at a temperature of 1450 ° C for 20 minutes.
- the sintered body contained an aluminum nitride, aluminum oxide, and an aluminum compound that was considered to be aluminum boride.
- the film forming apparatus a plurality of targets were arranged, and the chips were mounted on a rotating base material holder provided at the center of these targets to form a film.
- the target is gold on the coating film Ti Al, Ti Al, Ti Al, Ti Al, Ti, etc. were used with the same composition as the component of the genus.
- the deposition apparatus was evacuated to a vacuum degree of 1.33 X 10- 3 Pa (10- 5 torr), while introducing Ar gas into the chip in an atmosphere of 1.33Pa (10- 2 torr) - a 1000V voltage In addition, it was washed.
- the target was heated to 500 ° C, and after exhausting Ar gas, N gas was introduced as a reaction gas, a voltage of -120 V was applied to the chip, and the target was evaporated at a current of 100 A by vacuum arc discharge. And coated. Pressure, and 1.33Pa (10- 2 torr), The film thickness was controlled by the coating time.
- the coating film is a film containing C and 0 in addition to N
- the force to cover TiN as the intermediate layer and the outermost surface layer At that time, Ti was arranged as a target, and the films were sequentially formed in the same manner as above. Table 1 shows the samples thus obtained.
- the crystal system of the coating film had a cubic crystal structure.
- No 28 (Tio. 5 Al 0 .4Bo.i ) samples at N 0.7 None Table 1 No.9, 10, 21 and 22, intermediate consisting of thickness 0.05 / im of TiN between the substrate and the wear-resistant layer The intermediate layer has the function of increasing the bonding strength of the coating film.
- Sample Nos. 1, 10, 21, 27 and 28 have a coating film structure without the outermost layer. .
- the outermost surface layer made of TiN is coated because it is gold and it is easy to identify the used corner of the tool.
- the coating film is made of carbonitride or oxynitride.
- Samples Nos. 19, 20, and 25 are coating films containing only ⁇ as a metal element.
- Samples 27 and 28 were obtained by adding Si and B in addition to Ti and Al.
- Sample 26 is a commercially available tool without a coating.
- a work piece with an oil hole was cut for 10 minutes to perform an intermittent cutting test (interruption rate: 50%).
- As the work material hardened steel SCr420H (JIS standard) adjusted to hardness HRc60 was used.
- the term “interruption” means the ratio of the length of the idling portion to the length of the cut portion in the feed direction of the work material. At 50% interruptedness in this cutting test, it means that half the length of the workpiece was interrupted.
- the material of the present invention is suitable for cutting a work material in which intermittent cutting and continuous cutting are mixed. If there is a spline groove etc. in the whole work material, the intermittent rate will be 100%.
- Table 2 shows the results thus obtained.
- the results of the evaluation, taking into account the flank wear and the surface roughness of the cut surface, are listed in the evaluation column. Of these, ⁇ is the most favorable. This indication is the same in the following cutting tests. From these results, those having a thickness of the coating film including the intermediate layer, the wear-resistant layer, and the outermost layer exceeding 1 zm and those without the coating film were evaluated as X or ⁇ .
- the conditions of the cutting test are those belonging to high-precision machining in which the feed is small and the cut is small as compared with the cutting test 1.
- Table 3 shows the results thus obtained. Table 3 shows that the sample No. 5 with a film thickness of 1.3 m cannot be used after peeling. Sample No. 4 having a film thickness of 0.8 x m was of such a strength that it could be used barely. This is probably because the feed amount was smaller than in the cutting test 1 and the specific cutting resistance was increased, and the ratio of the cutting stress received in the coating film was increased.
- the work material was cut for 20 minutes to perform a continuous cutting test.
- the work material used was hardened steel SCr420H (JIS standard) adjusted to hardness HRc60.
- the cutting test conditions are as follows.
- Cut 0.05mm Cutting method: Dry type
- a cutting test was performed in the same manner as the cutting test 1 using the chips described in Table 1.
- two feed rates 0.02 mm / rev and 0.15 mm / rev, were adopted for chips with the same sample number, The material was continuously cut for 20 minutes and compared.
- the work material used was hardened steel SCr420H (standard) adjusted to hardness HRc60.
- the cutting test conditions are as follows.
- Table 5 shows the results thus obtained.
- the coating films of Samples No. 3, 4, 5, 6, and 8 were arranged in the order of thinner coating film thickness, and 0.4 ⁇ , 0.8 zm, 1.3 zm, 2.1 xm, 10.1 ⁇ m.
- Table 6 shows the results thus obtained.
- Grooving of hardened steel with a CBN tool has a smaller feed rate than normal cutting, especially when cutting the bottom of the groove, so-called “zero cutting”, and the force and the load on the film are greater than normal turning .
- the thinner the coating film the better the flank wear and film damage. Chips with a thickness of less than 1 ⁇ m perform particularly well.
- Table 7 shows the results thus obtained. Even in intermittent cutting during grooving, the coating film is thinner and the flank wear and film damage are better.
- Example 2 The effect was examined by changing the crystal orientation and the average particle size.
- a chip shape (model number SNGN120408) was machined from a surface-hardened material for a tool.
- the film thickness, X-ray diffraction intensity 1 (200) / 1 (111), and average crystal grain size were variously changed.
- This practice In the example, (Ti Al) N is mainly used for tools that have a wear-resistant layer and do not have an outermost layer and an intermediate layer.
- a surface coated high hardness material was prepared.
- the bias voltage is increased, the value of 1 (200) / 1 (111) tends to decrease.
- the average crystal grain size tends to decrease as the bias voltage increases, and to decrease as the film thickness decreases.
- Table 8 shows the properties of the chips thus obtained.
- Table 9 shows the results thus obtained. Samples 41 and 42 having a film thickness of less than 0.5 x m, a diffraction intensity of 1 (200) / 1 (111) of 3 or less, and an average particle size of 150 nm or less were particularly excellent.
- a conventional surface-coated high-hardness material can provide a sufficient life, and has a large load on a coating film, such as intermittent cutting of hardened hardened steel under wet as well as dry conditions. Can be widely used in high-precision processing. Further, when the material of the present invention is applied to a grooving tool, the life extension effect is particularly remarkable.
- FIG. 1 is a conceptual diagram illustrating a cutting cross-sectional area in traverse cutting.
- FIG. 2 is a conceptual diagram illustrating a cutting cross-sectional area in plunge cutting.
- FIG. 3 is a cross-sectional view taken along line AA of FIG. 2, schematically showing a state in which a work material is plunge-cut using the cutting tool of the present invention.
- FIG. 4 is a graph showing the relationship between bias voltage and residual stress.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Metallurgy (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Physical Vapour Deposition (AREA)
- Drilling Tools (AREA)
- Ceramic Products (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005511032A JP4714022B2 (ja) | 2003-06-27 | 2004-06-24 | 工具用表面被覆高硬度材料 |
US10/562,485 US7524569B2 (en) | 2003-06-27 | 2004-06-24 | Surface-coated high hardness material for tool |
CA002531028A CA2531028C (en) | 2003-06-27 | 2004-06-24 | Surface-coated high hardness material for tool |
EP04746342.7A EP1640089B1 (en) | 2003-06-27 | 2004-06-24 | Surface-coated high hardness material for tool |
US12/355,021 US7794860B2 (en) | 2003-06-27 | 2009-01-16 | Surface-coated high hardness material for tool |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003185661 | 2003-06-27 | ||
JP2003-185661 | 2003-06-27 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10562485 A-371-Of-International | 2004-06-24 | ||
US12/355,021 Division US7794860B2 (en) | 2003-06-27 | 2009-01-16 | Surface-coated high hardness material for tool |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005000508A1 true WO2005000508A1 (ja) | 2005-01-06 |
Family
ID=33549673
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/008873 WO2005000508A1 (ja) | 2003-06-27 | 2004-06-24 | 工具用表面被覆高硬度材料 |
Country Status (7)
Country | Link |
---|---|
US (2) | US7524569B2 (ja) |
EP (1) | EP1640089B1 (ja) |
JP (1) | JP4714022B2 (ja) |
KR (1) | KR100667639B1 (ja) |
CN (2) | CN1809436A (ja) |
CA (1) | CA2531028C (ja) |
WO (1) | WO2005000508A1 (ja) |
Cited By (3)
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JP2006247779A (ja) * | 2005-03-10 | 2006-09-21 | Tungaloy Corp | 被覆cBN基焼結体切削工具 |
JP2006281361A (ja) * | 2005-03-31 | 2006-10-19 | Kyocera Corp | 表面被覆部材および表面被覆切削工具 |
EP1932816A1 (en) * | 2005-10-04 | 2008-06-18 | Sumitomo Electric Hardmetal Corp. | CBN SINTERED BODY FOR HIGH-QUALITY SURFACE ASPECT MACHINING AND CUTTING TOOL OF cBN SINTERED BODY |
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SE528789C2 (sv) * | 2004-09-10 | 2007-02-13 | Sandvik Intellectual Property | PVD-belagt skär av hårdmetall samt sätt att tillverka detta |
SE528670C2 (sv) | 2004-12-22 | 2007-01-16 | Sandvik Intellectual Property | Skär belagt med ett transparent färgskikt |
US20090130434A1 (en) * | 2006-03-28 | 2009-05-21 | Kyocera Corporation | Surface Coated Tool |
EP2243578B1 (en) * | 2008-01-29 | 2015-03-11 | Kyocera Corporation | Cutting tool |
DE102008019202A1 (de) * | 2008-04-17 | 2009-10-22 | Kennametal Inc. | Beschichtungsverfahren , Werkstück oder Werkzeug und dessen Verwendung |
JP5403058B2 (ja) * | 2009-08-04 | 2014-01-29 | 株式会社タンガロイ | 被覆部材 |
US8814965B2 (en) * | 2009-11-11 | 2014-08-26 | Tungaloy Corporation | Cubic boron nitride sintered body and coated cubic boron nitride sintered body and preparation processes thereof |
US8409702B2 (en) * | 2011-02-07 | 2013-04-02 | Kennametal Inc. | Cubic aluminum titanium nitride coating and method of making same |
US9103036B2 (en) | 2013-03-15 | 2015-08-11 | Kennametal Inc. | Hard coatings comprising cubic phase forming compositions |
US9896767B2 (en) | 2013-08-16 | 2018-02-20 | Kennametal Inc | Low stress hard coatings and applications thereof |
US9168664B2 (en) | 2013-08-16 | 2015-10-27 | Kennametal Inc. | Low stress hard coatings and applications thereof |
EP3000913B1 (en) * | 2014-09-26 | 2020-07-29 | Walter Ag | Coated cutting tool insert with MT-CVD TiCN on TiAI(C,N) |
JP6634647B2 (ja) * | 2014-11-27 | 2020-01-22 | 三菱マテリアル株式会社 | 耐チッピング性、耐摩耗性にすぐれた表面被覆切削工具 |
US10570501B2 (en) | 2017-05-31 | 2020-02-25 | Kennametal Inc. | Multilayer nitride hard coatings |
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- 2004-06-24 KR KR1020057024912A patent/KR100667639B1/ko active IP Right Grant
- 2004-06-24 CN CNA2004800174192A patent/CN1809436A/zh active Pending
- 2004-06-24 WO PCT/JP2004/008873 patent/WO2005000508A1/ja active Application Filing
- 2004-06-24 CN CN201310165646.0A patent/CN103231079B/zh not_active Expired - Lifetime
- 2004-06-24 CA CA002531028A patent/CA2531028C/en not_active Expired - Lifetime
- 2004-06-24 EP EP04746342.7A patent/EP1640089B1/en not_active Expired - Lifetime
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JP2006247779A (ja) * | 2005-03-10 | 2006-09-21 | Tungaloy Corp | 被覆cBN基焼結体切削工具 |
JP2006281361A (ja) * | 2005-03-31 | 2006-10-19 | Kyocera Corp | 表面被覆部材および表面被覆切削工具 |
EP1932816A1 (en) * | 2005-10-04 | 2008-06-18 | Sumitomo Electric Hardmetal Corp. | CBN SINTERED BODY FOR HIGH-QUALITY SURFACE ASPECT MACHINING AND CUTTING TOOL OF cBN SINTERED BODY |
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Also Published As
Publication number | Publication date |
---|---|
US7524569B2 (en) | 2009-04-28 |
KR20060024442A (ko) | 2006-03-16 |
CA2531028A1 (en) | 2005-01-06 |
JP4714022B2 (ja) | 2011-06-29 |
US20090181243A1 (en) | 2009-07-16 |
US20060182998A1 (en) | 2006-08-17 |
CN1809436A (zh) | 2006-07-26 |
EP1640089B1 (en) | 2017-07-26 |
CN103231079B (zh) | 2017-09-29 |
JPWO2005000508A1 (ja) | 2006-07-27 |
EP1640089A1 (en) | 2006-03-29 |
CN103231079A (zh) | 2013-08-07 |
US7794860B2 (en) | 2010-09-14 |
CA2531028C (en) | 2009-07-14 |
KR100667639B1 (ko) | 2007-01-12 |
EP1640089A4 (en) | 2008-07-16 |
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