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USRE40026E1 - Cemented carbide insert for turning, milling and drilling - Google Patents

Cemented carbide insert for turning, milling and drilling Download PDF

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Publication number
USRE40026E1
USRE40026E1 US11/449,008 US44900897A USRE40026E US RE40026 E1 USRE40026 E1 US RE40026E1 US 44900897 A US44900897 A US 44900897A US RE40026 E USRE40026 E US RE40026E
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Prior art keywords
cemented carbide
layer
grain size
carbide insert
insert
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Expired - Lifetime
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US11/449,008
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English (en)
Inventor
Mats Waldenstrom
Ake Ostlund
Ove Alm
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Sandvik Intellectual Property AB
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Sandvik Intellectual Property AB
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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
    • 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
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/14—Treatment of metallic powder
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
    • C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • 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
    • 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.]

Definitions

  • the present invention relates to a cemented carbide cutting tool insert, particularly useful for turning, milling and drilling of steels and stainless steels.
  • Conventional cemented carbide inserts are produced by powder metallurgical methods including milling of a powder mixture forming the hard constituents and the binder phase, pressing and sintering.
  • the milling operation is an intensive milling and mills of different sizes and with the aid of milling bodies.
  • the milling time is of the order of several hours up to several days. Such processing is believed to be necessary in order to obtain a uniform distribution of the binder phase in the milled mixture. It is further believed that the intensive milling creates a reactivity of the mixture which further promotes the formation of a dense structure.
  • milling has its disadvantages. During the long milling time, the milling bodies are worn and contaminate the milled mixture. Furthermore even after an extended milling, a random rather than an ideal homogeneous mixture may be obtained.
  • the properties of the sintered cemented carbide containing two or more components depend on how the starting materials are mixed.
  • Coated carbide particles could be mixed with additional amounts of cobalt and other carbide powders to obtain the desired final material composition, pressed and sintered to a dense structure.
  • the general properties such as hardness, resistance against plastic deformation, resistance against formation of thermal fatigue cracks are to a great extent related to the volume fraction of the hard phases and the binder phase in the sintered cemented carbide body. It is well known that increasing the amount of the binder phase reduces the resistance to plastic deformation.
  • Different cutting conditions require different properties of the cutting insert.
  • a coated cemented carbide insert When cutting of steels with raw surface zones (e.g. rolled, forged or cast, a coated cemented carbide insert must consist of tough cemented carbide and have a very good coating adhesion as well.
  • the adhesive wear is generally the dominating wear type.
  • Measures can be taken to improve the cutting performance with respect to a specific wear type. However, very often such action will have an negative effect on other wear properties.
  • thermal fatigue cracks can be reduced by lowering the binder phase content. However, such action will lower the toughness properties of the cutting insert which is not desirable.
  • M s is the measured saturation magnetization of the sintered cemented carbide insert in kA/m hAm 2 /kg and wt % Co is the weight percentage of Co in the cemented carbide, is 0.86-0.96.
  • cemented carbide inserts made from powder mixtures with hard constituents with narrow grain size distributions and without conventional milling have excellent cutting performance in steels and stainless steels with or without raw surfaces in turning, milling and drilling under both dry and wet conditions.
  • FIG. 1 shows in 1200X the microstructure of a cemented carbide insert according to the invention.
  • FIG. 2 shows in 1200X the microstructure of a corresponding insert made according to prior art.
  • cemented carbide inserts with excellent properties for machining of steels and stainless steels comprising WC and 4-20 wt-% Co, preferably 5-12.5 wt-% Co and 0-30 wt-% cubic carbide, preferably 0-15 wt-% cubic carbide, most preferably 0-10 wt-% cubic carbide such as TiC, TaC, NbC or mixtures thereof.
  • the WC-grains have an average grain size in the range 0.8-3.5 ⁇ m, preferably 1.0-3.0 ⁇ m.
  • the microstructure of the cemented carbide according to the invention is further characterized by a narrow grain size distribution of WC in the range 0.5-4.5 ⁇ m, and a lower tendency for the cubic carbide particles, when present, to form long range skeleton, compared to conventional cemented carbide.
  • cemented carbide inserts comprising WC and 10-25 wt-% Co, preferably 15-20 wt-% Co, and ⁇ 2 wt-%, preferably ⁇ 1 wt-% cubic carbides such as Cr 3 C 2 and/or VC added as grain growth inhibitors.
  • the WC-grains have an average grain size 0.2-1.0 ⁇ m.
  • the microstructure of cemented carbide according to the invention is further characterized by a narrow grain size distribution of WC in the range 0-1.5 ⁇ m.
  • the amount of W dissolved in binder phase is controlled by adjustment of the carbon content by small additions of carbon black or pure tungsten powder.
  • the CW-ratio in inserts according to the invention shall be 0.82-1.0, preferably 0.86-0.96.
  • the sintered inserts according to the invention are used coated or uncoated, preferably coated with MTCVD, conventional CVD or PVD with or without Al 2 O 3 .
  • multilayer coatings comprising TiC X N v O z with columnar grains followed by a layer of ⁇ -Al 2 O 3 , ⁇ -Al 2 O 3 or a mixture of ⁇ - and ⁇ -Al 2 O 3 , have shown good results.
  • the coating described above is completed with a TiN-layer which could be brushed or used without brushing.
  • WC-powder with a narrow grain size distribution is wet mixed without milling with deagglomerated powder of other carbides generally TiC, TaC and/or NbC, binder metal and pressing agent, dried preferably by spray drying, pressed to inserts and sintered.
  • WC-powder with a narrow grain size distributions according to the invention with eliminated coarse grain tails >4.5 ⁇ m and with eliminated fine grain tails, ⁇ 0.5 ⁇ m, are prepared by sieving such as in a jetmill-classifier. It is essential according to the invention that the mixing takes place without milling, i.e., there should be not change in grain size or grain size distribution as a result of the mixing.
  • Hard constituents with narrow grain size distribution according to the alternative embodiment with eliminated coarse grain tails >1.5 ⁇ m are prepared by sieving such as in a jetmill classifier. It is essential according to the invention that the mixing takes place without milling i.e. there should be no change in grain size or grain size distribution as a result of the mixing.
  • the hard constituents are after careful deagglomeration coated with binder metal using methods disclosed in U.S. Pat. No. 5,505,902 or U.S. Pat. No. 5,529,804.
  • the cemented carbide powder according to the invention consists preferably of Co-coated WC+Co-binder, with or without additions of the cubic carbides, TiC, TaC, NbC, (Ti, W)C, (Ta,Nb)C, (Ti,Ta,Nb)C, (W,Ta,Nb)C, (W,Ti,Ta,Nb)C or Cr 3 C 2 and/or VC coated or uncoated, preferably uncoated, possibly with further additions of Co-powder in order to obtain the desired final composition.
  • Cemented carbide tool inserts of the type SEMN 1204 AZ, an insert for milling, with the composition 9.1 wt % Co, 1.23 wt % TaC and 0.30 wt % NbC and rest WC with a grain size of 1.6 ⁇ m were produced according to the invention.
  • Cobalt coated WC, WC-2 wt % Co, prepared according to U.S. Pat. No. 5,505,902 was carefully deagglomerated in a laboratory jetmill equipment, mixed with additional amounts of Co and deagglomerated uncoated (Ta,Nb)C and TaC powders to obtain the desired material composition.
  • the mixing was carried out in an ethanol and water solution (0.25 l fluid per kg cemented carbide powder) for 2 hours in a laboratory mixer and the batch size was 10 kg. Furthermore, 2 wt % lubricant, was added to the slurry. The carbon content was adjusted with carbon black to a binder phase highly alloyed with W corresponding to a CW-ratio of 0.89. After spray drying, the inserts were pressed and sintered according to standard practise and dense structures with no porosity were obtained, FIG. 1 .
  • the inserts were coated with a 0.5 ⁇ m equiaxed TiCN-layer (with a high nitrogen content corresponding to an estimated C/N-ratio of 0.05) followed by a 4 ⁇ m thick TiCN-layer with columnar grains by using MTCVD-technique (temperature 885-850° C. and CH 3 CN as the carbon and nitrogen source).
  • MTCVD-technique temperature 885-850° C. and CH 3 CN as the carbon and nitrogen source.
  • a 1.0 ⁇ m thick layer of Al 2 O 3 was deposited using a temperature 970° C. and a concentration of H 2 S dopant of 0.4% as disclosed in EP-A-523 021.
  • a thin (0.3 ⁇ m) layer of TiN was deposited on top according to known CVD-technique. XRD-measurement showed that the Al 2 O 3 -layer consisted of 100% ⁇ -phase.
  • the coated inserts were brushed by a nylon straw brush containing SiC grains. Examination of the brushed inserts in a light microscope showed that the thin TiN-layer had been brushed away only along the cutting edge leaving there a smooth Al 2 O 3 -layer surface.
  • Coating thickness measurements on cross sectioned brushed samples showed no reduction of the coating along the edge line except for the outer TiN-layer that was removed.
  • Two parallel bars each of a thickness of 33 mm were centrally positioned relative to the cutter body (diameter 100 mm) and with an air gap of 10 mm between them.
  • the cutting data were:
  • Evaluated life length of variant A according to the invention was 3600 mm and for the standard variant B only 2400 mm. Since the CW-ratio, the negative chamfer and the coatings were equal for variants A and B, the differences in cutting performance depend on the improved properties obtained by the invention.
  • the insert was provided with a coating consisting of a 0.5 ⁇ m equiaxed TiCN-layer, 2.1 ⁇ m columnar TiCN-layer, 2.2 ⁇ m ⁇ -Al 2 O 3 -layer and a 0.3 ⁇ m TiN-layer.
  • a bar with a thickness of 180 mm was centrally positioned relative to the cutter body (diameter 250 mm)
  • the cutting data were:
  • Insert B broke after 6000 mm after comb crack formation and chipping and insert C broke after 4800 mm by a similar wear pattern. Finally, insert A according to the invention, broke after 8000 mm.
  • Cemented carbide tool inserts of the type CNMG 120408-QM, an insert for turning, with the composition 8.0 wt % Co, and rest WC with a grain size of 3.0 ⁇ m were produced according to the invention.
  • Cobalt coated WC, WC-8 wt % Co, prepared according to U.S. Pat. No. 5,505,902 was carefully deagglomerated in a laboratory jetmill equipment. The mixing was carried out in an ethanol and water solution (0.25 l fluid per kg cemented carbide powder) for 2 hours in a laboratory mixer and the batch size was 10 kg. Furthermore, 2 wt % lubricant, was added to the slurry. The carbon content was adjusted with carbon black to a binder phase alloyed with w corresponding to a CW-ratio of 0.93. After spray drying, the inserts were pressed and sintered according to standard practise and dense structures with no porosity were obtained.
  • the inserts were coated with conventional CVD TiN+TiCN,1+1 ⁇ m.
  • Cemented carbide tool inserts of the type CNMG 120408-QM with the same chemical composition, average grain size of WC, CW-ratio and the same CVD-coating respectively but produced from powder manufactured with conventional ball milling techniques were used as reference.
  • Inserts from A and B were compared in a face turning test where the resistance against plastic deformation was measured as the flank wear.
  • the cutting data were:
  • flank wear after two passages was found to be 0.27 mm for variant A according to the invention and 0.30 for variant B.
  • Cemented carbide inserts of the type CNMG120408-MM, an inserted for turning, with the composition 10.5 wt-% Co, 1.16 wt-% Ta, 0.28 wt-% Nb and rest WC with a grain size of 1.6 ⁇ m were produced according to the invention.
  • Cobalt coated WC, WC-6 wt % Co, prepared according to U.S. Pat. No. 5,505,902 was carefully deagglomerated in a laboratory jetmill equipment, mixed with additional amounts of Co and deagglomerated uncoated (Ta,Nb)C and TaC powders to obtain desired material composition.
  • the mixing was carried out in an ethanol and water solution (0.25 l fluid per kg cemented carbide powder) for 2 hours in a laboratory mixer and the batch size was 10 kg. Furthermore, 2 wt % lubricant, was added to the slurry. The carbon content was adjusted with carbon black to a binder phase highly alloyed with W corresponding to a CW-ratio of 0.87. After spray drying, the inserts were pressed and sintered according to standard practise and dense structures with no porosity were obtained.
  • the inserts were coated with an innermost 0.5 ⁇ m equiaxed TiCN-layer with a high nitrogen content, corresponding to an estimated C/N ratio of 0.05, followed by a 4.2 ⁇ m thick layer of columnar TiCN deposited using MT-CVD technique.
  • a 1.0 ⁇ m layer of Al 2 O 3 consisting of pure ⁇ -phase according to procedure disclosed in EP-A-523 021.
  • a thin, 0.5 ⁇ m, TiN layer was deposited, during the same cycle, on top of the Al 2 O 3 -layer.
  • the coated insert was brushed by a SiC containing nylon straw brush after coating, removing the outer TiN layer on the edge.
  • Cemented carbide tool inserts of the type CNMG120408-MM with the same chemical composition, average grain size of WC, CW-ratio and the same CVD-coating respectively but produced from powder manufactured with conventional ball milling techniques were used as reference.
  • Inserts from A and B were compared in facing of a bar, diameter 180, with two, opposite, flat sides (thickness 120 mm) in 4LR60 material (a stainless steel).
  • the cutting data were:
  • the wear mechanism in this test was chipping of the edge.
  • Cemented carbide turning tool inserts of the type CNMG120408-PM with the composition 5.48 wt-% Co, 3.30 wt-% Ta, 2.06 wt-% Nb, 2.04 wt % Ti and rest WC with a grain size of 1.6 ⁇ m were produced according to the invention.
  • Cobalt coated WC, WC-5 wt % Co, prepared according to U.S. Pat. No. 5,505,902 was carefully deagglomerated in a laboratory jetmill equipment, mixed with additional amounts of Co and deagglomerated uncoated (Ta,Nb)C, TaC and (Ti,W)C powders to obtain desired material composition.
  • the mixing was carried out in an ethanol and water solution (0.25 l fluid per kg cemented carbide powder) for 2 hours in a laboratory mixer and the batch size was 10 kg. Furthermore, 2 wt % lubricant, was added to the slurry. The carbon content was adjusted with tungsten powder to a binder phase alloyed with W corresponding to a CW-ratio of 0.95. After spray drying, the inserts were pressed and sintered according to standard practise and dense structures with no porosity were obtained.
  • the inserts were coated with an innermost 5 ⁇ m layer of TiCN, followed by in subsequent steps during the same coating process a 6 ⁇ m layer of Al 2 O 3 .
  • Cemented carbide turning tool inserts of the type CNMG120408-PM with the composition 5.48 wt-% Co, 3.30 wt-% Ta, 2.06 wt-% Nb, 2.04 wt % Ti and rest WC with a grain size of 1.6 ⁇ m were produced according to the invention.
  • Uncoated deagglomerated WC was mixed with additional amounts of Co and deagglomerated uncoated (Ta,Nb)C, TaC and (Ti,W)C powders to obtain a desired material composition. The mixing was carried out in an ethanol and water solution (0.25 l fluid per kg cemented carbide powder) for 2 hours in a laboratory mixer and the batch size was 10 kg.
  • the inserts were coated with an innermost 5 ⁇ m layer of TiCN, followed by in subsequent steps during the same coating process a 6 ⁇ m layer of Al 2 O 3 .
  • Inserts from A, B and C were compared in an external longitudinal turning test with cutting speed 220 m/min and 190 m/min resp., a depth of cut of 2 mm, and a feed per tooth equal to 0.7 mm/revolution.
  • the work piece material was SS 2541 with a hardness of 300 HB and a diameter of 160 mm.
  • the wear criteria in this test was the measure of the edge depression in ⁇ m, which reflects the inverse resistance against plastic deformation. A lower value of the edge depression indicates higher resistance against plastic deformation.
  • Cemented carbide turning tool inserts of the type CNMG120408-PM with the composition 5.48 wt-% Co, 3.30 wt-% Ta, 2.06 wt-% Nb, 2.04 wt % Ti and rest WC with a grain size of 1.6 ⁇ m were produced according to the invention.
  • Cobalt coated WC, WC-5 wt % Co, prepared according to U.S. Pat. No. 5,505,902 was carefully deagglomerated in a laboratory jetmill equipment, mixed with additional amounts of Co and deagglomerated uncoated (Ta,Nb)C, TaC and (Ti,W)C powders to obtain desired material composition.
  • the mixing was carried out in an ethanol and water solution (0.25 l fluid per kg cemented carbide powder) for 2 hours in a laboratory mixer and the batch size was 10 kg. Furthermore, 2 wt % lubricant, was added to the slurry. The carbon content was adjusted with tungsten powder to a binder phase alloyed with w corresponding to a CW-ratio of 0.95. After spray drying, the inserts were pressed and sintered according to standard practise and dense structures with no porosity were obtained.
  • the inserts were coated with an innermost 5 ⁇ m layer of TiCN, followed by in subsequent steps during the same coating process a 6 ⁇ m layer of Al 2 O 3 .
  • Cemented carbide turning tool inserts of the type CNMG120408-PM with the composition 5.48 wt-% Co, 3.30 wt-% Ta, 2.06 wt-% Nb, 2.04 wt % Ti and rest WC with a grain size of 1.6 ⁇ m were produced according to the invention.
  • Uncoated deagglomerated WC was mixed with additional amounts of Co and deagglomerated uncoated (Ta,Nb)C, TaC and (Ti,W)C powders to obtain desired material composition. The mixing was carried out in an ethanol and water solution (0.25 l fluid per kg cemented carbide powder) for 2 hours in a laboratory mixer and the batch size was 10 kg.
  • the inserts were coated with an innermost 5 ⁇ m layer of TiCN, followed by in subsequent steps during the same coating process a 6 ⁇ m layer of Al 2 O 3 .
  • Inserts from A, B and C were compared in a external longitudinal turning test with cutting data 240 m/min, a dept of cut of 2 mm, and a feed per tooth equal to 0.7 mm/revolution.
  • the work piece material was SS 2541 with a hardness of 300 HB and a diameter of 160 mm.
  • the wear criteria in this test was the measure of the maximum flank wear after 5 min in cutting time, which reflects the resistance against plastic deformation.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Powder Metallurgy (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Chemical Vapour Deposition (AREA)
  • Drilling Tools (AREA)
US11/449,008 1996-07-19 1997-07-08 Cemented carbide insert for turning, milling and drilling Expired - Lifetime USRE40026E1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9602811A SE509616C2 (sv) 1996-07-19 1996-07-19 Hårdmetallskär med smal kornstorleksfördelning av WC
PCT/SE1997/001243 WO1998003691A1 (en) 1996-07-19 1997-07-08 Cemented carbide insert for turning, milling and drilling

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US09/214,923 Reissue US6221479B1 (en) 1996-07-19 1997-07-08 Cemented carbide insert for turning, milling and drilling

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USRE40026E1 true USRE40026E1 (en) 2008-01-22

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US11/449,008 Expired - Lifetime USRE40026E1 (en) 1996-07-19 1997-07-08 Cemented carbide insert for turning, milling and drilling
US09/214,923 Ceased US6221479B1 (en) 1996-07-19 1997-07-08 Cemented carbide insert for turning, milling and drilling

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US09/214,923 Ceased US6221479B1 (en) 1996-07-19 1997-07-08 Cemented carbide insert for turning, milling and drilling

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US (2) USRE40026E1 (sv)
EP (1) EP0914490B1 (sv)
JP (1) JP2000514722A (sv)
AT (1) ATE372397T1 (sv)
DE (1) DE69738109T2 (sv)
SE (1) SE509616C2 (sv)
WO (1) WO1998003691A1 (sv)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
US20070283554A1 (en) * 2004-07-12 2007-12-13 Sandvik Intellectual Property Ab Cutting tool insert
US8080323B2 (en) 2007-06-28 2011-12-20 Kennametal Inc. Cutting insert with a wear-resistant coating scheme exhibiting wear indication and method of making the same

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SE9802487D0 (sv) * 1998-07-09 1998-07-09 Sandvik Ab Cemented carbide insert with binder phase enriched surface zone
SE9802519D0 (sv) 1998-07-13 1998-07-13 Sandvik Ab Method of making cemented carbide
SE513177C2 (sv) 1999-01-14 2000-07-24 Sandvik Ab Sätt att tillverka hårdmetall med en bimodal kornstorleksfördelning och som innehåller korntillväxthämmare
DE19901305A1 (de) 1999-01-15 2000-07-20 Starck H C Gmbh Co Kg Verfahren zur Herstellung von Hartmetallmischungen
SE516017C2 (sv) * 1999-02-05 2001-11-12 Sandvik Ab Hårdmetallskär belagt med slitstark beläggning
SE519862C2 (sv) 1999-04-07 2003-04-15 Sandvik Ab Sätt att tillverka ett skär bestående av en PcBN-kropp och en hårdmetall- eller cermet-kropp
SE519828C2 (sv) * 1999-04-08 2003-04-15 Sandvik Ab Skär av en hårdmetallkropp med en bindefasanrikad ytzon och en beläggning och sätt att framställa denna
SE9901244D0 (sv) 1999-04-08 1999-04-08 Sandvik Ab Cemented carbide insert
SE519603C2 (sv) 1999-05-04 2003-03-18 Sandvik Ab Sätt att framställa hårdmetall av pulver WC och Co legerat med korntillväxthämmare
SE519250C2 (sv) * 2000-11-08 2003-02-04 Sandvik Ab Belagt hårdmetallskär och användning av detsamma för våtfräsning
JP2003251503A (ja) * 2001-12-26 2003-09-09 Sumitomo Electric Ind Ltd 表面被覆切削工具
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WO1998003691A1 (en) 1998-01-29
SE9602811L (sv) 1998-02-26
DE69738109D1 (de) 2007-10-18
EP0914490B1 (en) 2007-09-05
SE9602811D0 (sv) 1996-07-19
SE509616C2 (sv) 1999-02-15
US6221479B1 (en) 2001-04-24
ATE372397T1 (de) 2007-09-15
DE69738109T2 (de) 2008-08-28
EP0914490A1 (en) 1999-05-12

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