WO2025069213A1 - 超硬合金 - Google Patents

超硬合金 Download PDF

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Publication number
WO2025069213A1
WO2025069213A1 PCT/JP2023/035009 JP2023035009W WO2025069213A1 WO 2025069213 A1 WO2025069213 A1 WO 2025069213A1 JP 2023035009 W JP2023035009 W JP 2023035009W WO 2025069213 A1 WO2025069213 A1 WO 2025069213A1
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WIPO (PCT)
Prior art keywords
cemented carbide
binder phase
mass
content
volume
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PCT/JP2023/035009
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English (en)
French (fr)
Japanese (ja)
Inventor
保樹 城戸
好博 木村
アノンサック パサート
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Sumitomo Electric Industries Ltd
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Sumitomo Electric Industries Ltd
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Application filed by Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to CN202380100085.8A priority Critical patent/CN121420084A/zh
Priority to PCT/JP2023/035009 priority patent/WO2025069213A1/ja
Priority to JP2024516400A priority patent/JP7694819B1/ja
Priority to TW113129375A priority patent/TW202513818A/zh
Publication of WO2025069213A1 publication Critical patent/WO2025069213A1/ja
Anticipated expiration legal-status Critical
Pending 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

Definitions

  • This disclosure relates to cemented carbide.
  • Patent Document 1 cemented carbide alloys containing multiple tungsten carbide particles and a binder phase have been used as materials for cutting tools.
  • the cemented carbide of the present disclosure is A cemented carbide comprising a plurality of tungsten carbide particles and a binder phase,
  • the cemented carbide comprises 89 volume % or more of the tungsten carbide particles and the binder phase in total,
  • the cemented carbide contains 1.8 vol. % or more and 20.0 vol. % or less of the binder phase, the binder phase comprises cobalt;
  • the cemented carbide contains 1.0 mass% or more of cobalt,
  • the hardness of the binder phase at 25° C., as measured by a nanoindenter method, is 7.0 GPa or more.
  • FIG. 1 is a diagram illustrating a cross section of a cemented carbide according to an embodiment of the present disclosure.
  • the present disclosure therefore aims to provide a cemented carbide alloy that enables a longer tool life, particularly when used as a material for cutting tools for cutting high-hardness materials.
  • the cemented carbide of the present disclosure is A cemented carbide comprising a plurality of tungsten carbide particles and a binder phase, The cemented carbide contains 89 volume % or more of the tungsten carbide particles and the binder phase in total, The cemented carbide contains the binder phase in an amount of 1.8% by volume or more and 20.0% by volume or less, the binder phase comprises cobalt; The cemented carbide contains 1.0 mass% or more of cobalt, The hardness of the binder phase at 25° C., as measured by a nanoindenter method, is 7.0 GPa or more.
  • the binder phase further contains a first element
  • the first element may be at least one element selected from the group consisting of silicon, phosphorus, germanium, tin, rhenium, ruthenium, osmium, iridium, and platinum, thereby providing a cemented carbide that can further extend the tool life of a cutting tool, particularly in cutting high-hardness materials.
  • the percentage of the mass M1 of the first element in the binder phase relative to the sum M1+M2 of the mass M1 of the first element and the mass M2 of cobalt, ⁇ M1/(M1+M2) ⁇ 100, may be 1% or more and 6% or less. This makes it possible to provide a cemented carbide alloy that can further extend the tool life of cutting tools, especially in cutting high-hardness materials.
  • a ⁇ B means the upper and lower limits of a range (i.e., greater than or equal to A and less than or equal to B). If no unit is stated for A and only a unit is stated for B, the units of A and B are the same.
  • a cemented carbide according to one embodiment of the present disclosure will be described with reference to FIG.
  • One embodiment of the present disclosure (hereinafter also referred to as "the present embodiment") is A cemented carbide (3) comprising a plurality of tungsten carbide particles (1) and a binder phase (2),
  • the cemented carbide 3 contains the tungsten carbide particles 1 and the binder phase 2 in a total amount of 89 volume % or more,
  • the cemented carbide 3 contains the binder phase 2 in an amount of 1.8 vol.% or more and 20.0 vol.% or less,
  • the binder phase 2 contains cobalt,
  • the cemented carbide 3 contains 1.0 mass% or more of cobalt,
  • the hardness of the binder phase 2 at 25° C. measured by a nanoindenter method is 7.0 GPa or more.
  • the cemented carbide 3 of this embodiment comprises a plurality of tungsten carbide particles 1 (hereinafter also referred to as "WC particles 1") and a binder phase 2, and the total content of the WC particles 1 and the binder phase 2 in the cemented carbide 3 is 89 volume % or more.
  • WC particles 1 tungsten carbide particles 1
  • binder phase 2 the total content of the WC particles 1 and the binder phase 2 in the cemented carbide 3 is 89 volume % or more.
  • the cemented carbide 3 of embodiment 1 contains 1.8 volume % or more and 20.0 volume % or less of the binder phase 2, the binder phase 2 contains cobalt, and the cemented carbide 3 contains 1.0 mass % or more of cobalt. Furthermore, the hardness of the binder phase 2 at 25°C measured by the nanoindenter method is 7.0 GPa or more, and the binder phase 2 can have excellent hardness under conditions of 25°C (in other words, under room temperature conditions). As a result, the hardness of the cemented carbide 3 is improved, and a cutting tool using the cemented carbide 3 can have excellent wear resistance, especially when machining high-hardness materials.
  • the cemented carbide 3 contains tungsten carbide particles 1 and binder phase 2 in a total amount of 89% or more by volume. This allows the hardness of the cemented carbide 3 to be increased.
  • the cemented carbide 3 may contain tungsten carbide particles 1 and binder phase 2 in a total amount of 90% or more by volume, 91% or more by volume, or 92% or more by volume.
  • the upper limit of the total content of the tungsten carbide particles 1 and binder phase 2 may be, for example, 100% or less by volume, 99% or less by volume, or 98% or less by volume.
  • the cemented carbide 3 may contain tungsten carbide particles 1 and binder phase 2 in a total amount of 90% or more by volume and 100% or less by volume, 91% or more by volume and 100% or less by volume, or 92% or more by volume and 100% or less by volume.
  • the cemented carbide 3 contains 1.8 volume % or more and 20.0 volume % or less of the binder phase 2. This allows the cemented carbide 3 to have increased hardness and toughness.
  • the lower limit of the content of the binder phase 2 in the cemented carbide 3 may be 2.0 volume % or more, 3.0 volume % or more, or 4.0 volume % or more.
  • the upper limit of the content of the binder phase 2 in the cemented carbide 3 may be 19.0 volume % or less, 18.0 volume % or less, or 17.0 volume % or less.
  • the cemented carbide 3 may contain 2.0 volume % or more and 19.0 volume % or less of the binder phase 2, 3.0 volume % or more and 18.0 volume % or less of the binder phase 2, or 4.0 volume % or more and 17.0 volume % or less of the binder phase 2.
  • the cemented carbide 3 of the first embodiment can be composed of a plurality of tungsten carbide particles 1 and a binder phase 2.
  • the cemented carbide 3 of the present embodiment can include other phases (not shown) in addition to the tungsten carbide particles 1 and the binder phase 2.
  • the other phases include carbides, nitrides, or carbonitrides containing at least one second element selected from the group consisting of titanium (Ti), tantalum (Ta), niobium (Nb), zirconium (Zr), hafnium (Hf), and molybdenum (Mo).
  • the composition of the other phases is, for example, TiCN, TaC, NbC, ZrC, HfC, or Mo2C .
  • the cemented carbide 3 of the first embodiment can be composed of tungsten carbide particles 1, a binder phase 2, and other phases.
  • the content of the other phases in the cemented carbide 3 is acceptable within a range that does not impair the effects of the present disclosure.
  • the content of the other phases in the cemented carbide 3 may be more than 0 vol% and less than 20 vol%, more than 0 vol% and less than 18 vol%, or more than 0 vol% and less than 16 vol%.
  • the total content of the tungsten carbide particles 1 and the binder phase 2 in the cemented carbide 3 may be 80 vol% or more and less than 100 vol%, 82 vol% or more and less than 100 vol%, or 84 vol% or more and less than 100 vol%.
  • the cemented carbide 3 of the first embodiment may contain impurities.
  • the impurities include iron (Fe), calcium (Ca), oxygen (O), and sulfur (S).
  • the impurity content of the cemented carbide 3 is acceptable within a range that does not impair the effects of the present disclosure.
  • the impurity content of the cemented carbide 3 may be 0 mass% or more and less than 0.1 mass%.
  • the impurity content of the cemented carbide 3 is measured by ICP optical emission spectroscopy (Inductively Coupled Plasma Emission Spectroscopy (measuring device: Shimadzu Corporation "ICPS-8100" (trademark)).
  • the method for measuring the content [volume %] of tungsten carbide particles 1 in cemented carbide 3 and the content [volume %] of binder phase 2 in cemented carbide 3 is as follows.
  • the mirror-finished surface of the cemented carbide 3 is photographed with a scanning electron microscope (SEM) to obtain a backscattered electron image.
  • the photographed area is set to the center of the cross section of the cemented carbide 3, that is, a position that does not include any part whose properties are clearly different from the bulk part, such as the surface area of the cemented carbide 3 (a position where the entire photographed area is the bulk part of the cemented carbide 3).
  • the observation magnification is 5000x.
  • the measurement conditions are an acceleration voltage of 3 kV, a current value of 2 nA, and a working distance (WD) of 5 mm.
  • (D1) The photographed area of (C1) above is analyzed using an energy dispersive X-ray analyzer (SEM-EDX) attached to a SEM to determine the distribution of the elements identified in (B1) above in the photographed area, and an element mapping image is obtained.
  • SEM-EDX energy dispersive X-ray analyzer
  • the above (G1) measurement is performed in five different non-overlapping measurement fields.
  • the average of the area percentages of tungsten carbide particles 1 in the five measurement fields corresponds to the content [volume %] of tungsten carbide particles 1 in cemented carbide 2
  • the average of the area percentages of binder phase 2 in the five measurement fields corresponds to the content [volume %] of binder phase 2 in cemented carbide 3.
  • the content of the other phases in the cemented carbide 3 can be obtained by subtracting the content [volume %] of the tungsten carbide particles 1 and the content [volume %] of the binder phase 2 measured by the above procedure from the total cemented carbide 3 (100 volume %).
  • the binder phase 2 contains cobalt, and the cemented carbide 3 contains 1.0 mass% or more of cobalt. This can impart excellent toughness to the cemented carbide 3.
  • the binder phase 2 may contain 50 mass% or more of cobalt, 60 mass% or more, 70 mass% or more, 80 mass% or more, 90 mass% or more, or 95 mass% or more of cobalt.
  • the binder phase 2 may be made of cobalt.
  • the binder phase 2 may also be made of cobalt and a first element described later.
  • Cobalt in the cemented carbide 3 may be present only in the binder phase 2.
  • the lower limit of the content of cobalt in the cemented carbide 3 may be 2.0 mass% or more, 3.0 mass% or more, or 4.0 mass% or more.
  • the upper limit of the content of cobalt in the cemented carbide 3 may be 20 mass% or less, 15 mass% or less, 12 mass% or less, or 10 mass% or less.
  • the cemented carbide 3 may contain 1.0 mass % or more and 20 mass % or less of cobalt, 2.0 mass % or more and 15 mass % or less of cobalt, or 3.0 mass % or more and 12 mass % or less of cobalt.
  • the method for measuring the cobalt content in the cemented carbide 3 is as follows. First, a photographed area is set using the same method as (A1) to (C1) of the method for measuring the content of the tungsten carbide particles 1 and the content of the binder phase 2 in the cemented carbide 3 described above. Next, the photographed area is analyzed using SEM-EDX to identify the distribution of the elements identified in (B1) above in the photographed area, and an element mapping image is obtained, while at the same time identifying the cobalt content in the cemented carbide 3. The method for measuring the "cobalt content in the binder phase 2" is as follows.
  • a region in which the binder phase 2 exists is identified on the image after the binarization process using the same method as (A1) to (F1) of the method for measuring the content of the tungsten carbide particles 1 and the content of the binder phase 2 in the cemented carbide 3 described above.
  • the region in which the binder phase 2 exists is analyzed using SEM-EDX to measure the "cobalt content in the binder phase 2".
  • the method for determining that "cobalt in cemented carbide 3 exists only in binder phase 2" is as follows.
  • the regions where tungsten carbide particles 1 exist and the regions where binder phase 2 exist are determined on the image after binarization processing using the same method as (A1) to (F1) for measuring the content of tungsten carbide particles 1 and the content of binder phase 2 in cemented carbide 3 described above.
  • the binder phase 2 may further contain a first element, which may be at least one element selected from the group consisting of silicon, phosphorus, germanium, tin, rhenium, ruthenium, osmium, iridium, and platinum. This makes it possible to provide a cemented carbide 3 that can further extend the tool life of a cutting tool, especially when cutting high-hardness materials.
  • the content of the first element in the cemented carbide 3 may be 0.01% by mass or more and 1.0% by mass or less. This allows the binder phase 2 to have both better hardness and better toughness.
  • the content of the first element in the binder phase 2 may be 50% by mass or less, 40% by mass or less, 30% by mass or less, 20% by mass or less, 10% by mass or less, or 5% by mass or less.
  • the first element in the cemented carbide 3 may be present only in the binder phase 2.
  • the lower limit of the content of the first element in the cemented carbide 3 may be 0.01% by mass or more, 0.04% by mass or more, or 0.1% by mass or more.
  • the upper limit of the content of the first element in the cemented carbide 3 may be 1.0% by mass or less, 0.8% by mass or less, or 0.6% by mass or less.
  • the content of the first element in the cemented carbide 3 may be 0.04% by mass or more and 0.8% by mass or less, or 0.1% by mass or more and 0.6% by mass or less.
  • the method for measuring the content of the first element in the cemented carbide 3 is as follows. Except for the point where "cobalt” is read as “first element”, the method is the same as the method for measuring the content of cobalt in the cemented carbide 3.
  • the method for measuring the "content of the first element in the binder phase 2" is as follows. Except for the point where "Next, measure the “cobalt” content in the binder phase 2.” is read as “Next, measure the "first element” content in the binder phase 2.".
  • the method for specifying that "the first element in the cemented carbide 3 is present only in the binder phase 2" is as follows.
  • the percentage of the mass M1 of the first element with respect to the total M1+M2 of the mass M1 of the first element and the mass M2 of cobalt, ⁇ M1/(M1+M2) ⁇ 100, may be 1% or more and 6% or less.
  • the binder phase 2 to have both superior hardness and superior toughness, and therefore it is possible to provide a cemented carbide 3 that can further extend the tool life of a cutting tool, especially in cutting high-hardness materials.
  • the mass M1 of the first element means the total mass of all types of first elements when the binder phase contains two or more types of first elements.
  • the lower limit of the percentage ⁇ M1/(M1+M2) ⁇ 100 may be 1% or more, 2% or more, or 3% or more.
  • the upper limit of the percentage ⁇ M1/(M1+M2) ⁇ 100 may be 6% or less, 5% or less, or 4% or less.
  • the percentage ⁇ M1/(M1+M2) ⁇ x 100 may be 2% or more and 5% or less, or 3% or more and 4% or less.
  • the method for measuring the percentage ⁇ M1/(M1+M2) ⁇ 100 is as follows.
  • the area where the binder phase 2 exists is identified on the image after binarization processing by the same method as (A1) to (F1) of the method for measuring the content of the tungsten carbide particles 1 and the content of the binder phase 2 in the cemented carbide 3 described above.
  • the area where the binder phase 2 exists is analyzed using SEM-EDX to measure the cobalt content and the first element content in the binder phase 2, and the percentage ⁇ M1/(M1+M2) ⁇ 100 is calculated based on these.
  • the above measurement is performed in five different non-overlapping measurement fields.
  • the average of the percentage ⁇ M1/(M1+M2) ⁇ 100 in the five measurement fields corresponds to the "percentage ⁇ M1/(M1+M2) ⁇ 100" in the binder phase 2.
  • the hardness of the binder phase 2 at 25°C measured by the nanoindenter method is 7.0 GPa or more. This allows the binder phase 2 to have excellent hardness under conditions of 25°C (in other words, under room temperature conditions).
  • the lower limit of the hardness may be 7.1 GPa or more, 7.2 GPa or more, or 7.4 GPa or more.
  • the upper limit of the hardness may be 9 GPa or less, 8.5 GPa or less, or 8 GPa or less.
  • the hardness may be 7.0 GPa or more and 9 GPa or less, 7.1 GPa or more and 8.5 GPa or less, or 7.2 GPa or more and 8 GPa or less.
  • the hardness of the bonding phase 2 at 25°C measured by the nanoindenter method is measured by the nanoindenter method (Bruker's "Hysitron TI 980 Triboindenter”).
  • the nanoindenter method is a method conforming to ISO14577, and is performed under the conditions of a measurement load of 0.5 mN, a load time of 0.1 seconds, a load holding time of 0.1 seconds, and an unloading time of 0.1 seconds.
  • the measurement objects are each of any 10 bonding phases 2 exposed by polishing the surface of the cemented carbide 3 using a cross-session polisher (CP) processing device (JEOL Ltd.'s "IB-19500CP Cross-Section Sample Preparation Device” (trademark)).
  • the average value of the hardness of each of the 10 bonding phases 2 is defined as the "hardness of bonding phase 2" above.
  • the tungsten carbide particles 1 include at least one of "pure WC particles (including WC containing no impurity elements and WC containing impurity elements below the detection limit)" and "WC particles containing impurity elements intentionally or unavoidably therein, as long as the effect of the present disclosure is not impaired.”
  • the content of impurities in the tungsten carbide particles (when the impurity elements are two or more types, the total content of the elements) is less than 0.1 mass%.
  • the content of impurities in the tungsten carbide particles is measured by ICP emission spectroscopy (Inductively Coupled Plasma Emission Spectroscopy, measuring device: "ICPS-8100" (trademark) manufactured by Shimadzu Corporation).
  • the average particle size of the tungsten carbide particles 1 is not particularly limited.
  • the average particle size of the tungsten carbide particles 1 can be, for example, 0.5 ⁇ m or more and 3 ⁇ m or less. It has been confirmed that the cemented carbide 3 of the first embodiment can have a long tool life regardless of the average particle size of the tungsten carbide particles 1.
  • the cemented carbide 3 of this embodiment can be used for cutting tools.
  • the cutting tools include cutting tools for general-purpose machining. More specifically, cutting tools such as drills, end mills, indexable cutting tips for drills, indexable cutting tips for end mills, indexable cutting tips for milling, indexable cutting tips for turning, metal saws, gear cutting tools, reamers, taps, etc. can be used.
  • the cemented carbide of this embodiment can be manufactured by carrying out a raw material powder preparation step, a mixing step, a molding step, a sintering step, a cooling step, and a HIP (Hot Isostatic Pressing) step in the above order. Each step will be described below.
  • the preparation step is a step of preparing raw material powders of materials constituting the cemented carbide.
  • raw material powders include tungsten carbide powder (hereinafter also referred to as "WC powder") and cobalt (Co) powder.
  • first element powder, niobium carbide (NbC) powder, tungsten carbide (TaC) powder, titanium carbonitride (TiCN) powder, and zirconium carbide (ZrC) powder can be prepared.
  • These raw material powders can be commercially available.
  • the average particle size of these raw material powders is not particularly limited and can be, for example, 0.5 to 2 ⁇ m.
  • the average particle size of the raw material powder means the average particle size measured by the FSSS (Fisher Sub-Sieve Sizer) method. The average particle size is measured using a "Sub-Sieve Sizer Model 95" (trademark) manufactured by Fisher Scientific.
  • the mixing step is a step of mixing the raw material powders prepared in the preparation step at a predetermined ratio.
  • the mixing step produces a mixed powder in which the raw material powders are mixed.
  • the mixing ratio of the raw material powders is adjusted appropriately according to the composition of the target cemented carbide.
  • the first element powder may be used as the raw material powder. This makes it easier to provide the cemented carbide with the desired "hardness at 25°C measured by the nanoindenter method of the binder phase" since the first element is sufficiently dissolved in the binder phase.
  • the total content of the powders other than the WC powder, Co powder, and the first element powder in the mixed powder may be less than 5% by mass.
  • the binder phase content and the WC particle content can each be within a desired range.
  • the raw material powders can be mixed using conventional mixing methods such as an attritor, ball mill, or bead mill. Conventional mixing conditions can also be used.
  • the mixing time can be, for example, 2 hours or more and 20 hours or less.
  • the mixed powder may be granulated as necessary. Granulating the mixed powder makes it easier to fill the mixed powder into a die or mold during the molding step described below.
  • a known granulation method can be used for granulation, and for example, a commercially available granulator such as a spray dryer can be used.
  • the molding step is a step of molding the mixed powder obtained in the mixing step into a shape for a cutting tool to obtain a molded body.
  • the molding method and molding conditions in the molding step are not particularly limited and may be general methods and conditions.
  • the sintering step is a step of sintering the compact obtained in the compacting step to obtain a cemented carbide intermediate body.
  • the sintering conditions in this embodiment are as follows: The compact is heated to 1360° C. and held at 1360° C. for 1 hour.
  • the cooling step is a step of cooling the cemented carbide intermediate body after the sintering step. More specifically, the cemented carbide intermediate body is cooled to 800° C. (hereinafter, also referred to as “first cooling”).
  • the cooling rate of the first cooling is, for example, 20° C./min.
  • the HIP process is a process of performing HIP treatment on the cemented carbide intermediate body after the cooling process.
  • the conditions of the HIP process in this embodiment are as follows: The cemented carbide intermediate body is held for 2 hours under a pressure of 100 MPa. This allows the cemented carbide of embodiment 1 to be obtained.
  • the sintering step is performed by heating the compact to 1360°C and holding it at 1360°C for 1 hour.
  • the cooling step is performed by setting the cooling rate to 800°C at 20°C/min.
  • the HIP step is performed under conditions of a pressure of 100 MPa and a time of 2 hours.
  • the nanoindenter method can be performed in accordance with ISO 14577 under conditions of a measurement load of 0.5 mN, a loading time of 0.1 seconds, a load holding time of 0.1 seconds, and an unloading time of 0.1 seconds.
  • cemented carbide samples 1 to 19 and 101 to 114 were prepared as follows.
  • WC powder (average particle size: 1 ⁇ m), Co powder (average particle size: 1 ⁇ m), first element powder, and TiCN powder (average particle size: 1 ⁇ m) were prepared.
  • first element powders Si powder (average particle size: 1 ⁇ m), Ge powder (average particle size: 1 ⁇ m), Sn powder (average particle size: 1 ⁇ m), Os powder (average particle size: 1 ⁇ m), Ir powder (average particle size: 1 ⁇ m), Pt powder (average particle size: 1 ⁇ m), P powder (average particle size: 1 ⁇ m), Re powder (average particle size: 1 ⁇ m), and Ru powder (average particle size: 1 ⁇ m) were prepared.
  • ⁇ Mixing step> The raw material powders were mixed in the ratios shown in Tables 1 and 2 for 10 hours using an attritor to obtain mixed powders.
  • ⁇ M1/(M1+M2) ⁇ 100> For each cemented carbide sample, ⁇ M1/(M1+M2) ⁇ 100 was determined by the method described in embodiment 1. The results are shown in the column " ⁇ M1/(M1+M2) ⁇ 100[%]" in Tables 3 and 4.
  • ⁇ Cutting test> First, three end mills (GSXB20000 type) with a blade diameter of ⁇ 6 mm were prepared as cutting tools for each sample by machining round bars made of cemented carbide for each sample. Next, the end mills of each sample were used to perform cutting under the following cutting conditions, and the cutting distance until the end mills were worn down to 0.05 mm was measured. For each sample, the cutting length was obtained by calculating the average cutting distance of each of the three end mills. The obtained results are shown in the "Cutting Length [m]" column of Tables 3 and 4, respectively. Note that the longer the cutting length, the longer the tool life.
  • the cemented carbide alloys of samples 1 to 19 correspond to the examples.
  • the cemented carbide alloys of samples 101 to 114 correspond to the comparative examples. From the results in Tables 3 and 4, it was found that the cemented carbide alloys of samples 1 to 19 enable a longer tool life than the cemented carbide alloys of samples 101 to 114, even when used as materials for cutting tools for cutting high-hardness materials.
  • cemented carbide samples 1 to 19 can extend the tool life even when used as materials for cutting tools for cutting high-hardness materials.

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  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
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  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
PCT/JP2023/035009 2023-09-26 2023-09-26 超硬合金 Pending WO2025069213A1 (ja)

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CN202380100085.8A CN121420084A (zh) 2023-09-26 2023-09-26 硬质合金
PCT/JP2023/035009 WO2025069213A1 (ja) 2023-09-26 2023-09-26 超硬合金
JP2024516400A JP7694819B1 (ja) 2023-09-26 2023-09-26 超硬合金
TW113129375A TW202513818A (zh) 2023-09-26 2024-08-06 超硬合金

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