SE519896C2 - Cutting tool insert used for wet and dry milling of low and medium alloyed steels and stainless steels, comprises cemented carbide body and coating - Google Patents
Cutting tool insert used for wet and dry milling of low and medium alloyed steels and stainless steels, comprises cemented carbide body and coatingInfo
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- SE519896C2 SE519896C2 SE0000667A SE0000667A SE519896C2 SE 519896 C2 SE519896 C2 SE 519896C2 SE 0000667 A SE0000667 A SE 0000667A SE 0000667 A SE0000667 A SE 0000667A SE 519896 C2 SE519896 C2 SE 519896C2
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/40—Oxides
- C23C16/403—Oxides of aluminium, magnesium or beryllium
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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
- B23B27/148—Composition of the cutting inserts
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- 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
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/32—Carbides
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/34—Nitrides
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/36—Carbonitrides
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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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Chemical Vapour Deposition (AREA)
Abstract
Description
25 30 35 40 45 50 55 519 896 2 av ett WC-Co-baserat hårdmetallsubstrat med en bindefas med hög W-inlösning och en beläggning bestående av ett inre skikt av Ti(CQ@0z) med kolumnära korn följt av ett skikt av finkor- nig K-Alfib och ett yttersta skikt av TiN. Of a WC-Co-based cemented carbide substrate with a binder phase with high W solution and a coating consisting of an inner layer of Ti (CQ @ 0z) with columnar grains followed by a layer of fines nig K-Al fi b and an outermost layer of TiN.
US 5,700,569 beskriver ett aluminiumoxidbelagt hårdme- tallskär med förbättrade egenskaper för skärande bearbetning.US 5,700,569 describes an alumina coated cemented carbide insert with improved cutting machining properties.
Skäret har sex till åtta skikt av aluminiumoxid med en total beläggningstjocklek av upp till omkring 15 um.The insert has six to eight layers of alumina with a total coating thickness of up to about 15 microns.
US 4,984,940 beskriver ett vändskär avsett för metallbe- arbetning med ett WC-Co hårdmetallsubstrat med en värmebestän- dig multiskiktsbeläggning därpå. Substratet har ett koboltin- nehåll av 6,1 till 6,5 viktsprocent. Beläggningen innehåller ett flertal aluminiumoxidskikt vilka är åtskilda från och bundna till varandra genom en nitrid med ett grundämne från grupp IVb, såsom titannitrid, och som är bundna till substra- tet av ett grundskikt, 5 till 8 um i tjocklek, sammansatt av en karbid och/eller karbonitrid av titan, zirkonium och/eller hafnium.US 4,984,940 describes a indexable insert intended for metalworking with a WC-Co cemented carbide substrate with a heat-resistant multilayer coating thereon. The substrate has a cobalt content of 6.1 to 6.5% by weight. The coating contains a plurality of alumina layers which are separated from and bonded to each other by a nitride having a Group IVb element, such as titanium nitride, and which are bonded to the substrate by a base layer, 5 to 8 μm in thickness, composed of a carbide and / or carbonitride of titanium, zirconium and / or hafnium.
US 6,015,614 beskriver ett A143-TiN belagt hårdmetall vändskär avsett för svarvning av stål och speciellt Ca-behand- lat stål. Aluminium skiktet är skyddat av ett extra tjockt och multilagrad beläggning av TiN.US 6,015,614 describes an A143-TiN coated cemented carbide indexable insert intended for turning steel and especially Ca-treated steel. The aluminum layer is protected by an extra thick and multi-layered coating of TiN.
Det har nu visat sig att förbättrade egenskaper vid svarvning kan erhållas vid kombinerande av substrat och mul- tiskiktsbeläggning beskrivna i föreliggande uppfinning. Skäret har utomordentliga prestanda vid svarvning av rostfritt stål, speciellt vid bearbetning med kylvätska vid medelhöga skärhas- tigheter som 120-200 m/min. Detta skärverktyg uppvisningar bättre egenskaper med avseende på flera av de tidigare nämnda förslitningstyperna, särskilt uppkomst av urflisningar orsa- kade av sprickor längs skäreggen.It has now been found that improved turning properties can be obtained by combining substrates and multilayer coatings described in the present invention. The insert has excellent performance when turning stainless steel, especially when machining with coolant at medium-high cutting speeds such as 120-200 m / min. This cutting tool exhibits better properties with respect to several of the previously mentioned types of wear, in particular the occurrence of chippings caused by cracks along the cutting edge.
Fig 1 är ett strukturfoto i 3000X förstoring av ett be- lagt skär enligt föreliggande uppfinning i vilket a - substrat b - MTCVD beläggning med kolumnära korn c - multiskiktsbeläggning Skäret enligt föreliggande uppfinning består av: ett hårdmetallsubstrat med en relativt låg mängd av kubiska karbi- der, med en bindefas med medelhög till hög inlösning av W och med fin till medelgrov kornstorlek. Substratet är försett med en multiskiktsbeläggning.Fig. 1 is a structure view in 3000X magnification of a coated insert according to the present invention in which a - substrate b - MTCVD coating with columnar grains c - multilayer coating The insert according to the present invention consists of: a cemented carbide substrate with a relatively low amount of cubic carbide. there, with a binder phase with medium to high redemption of W and with fine to medium coarse grain size. The substrate is provided with a multilayer coating.
Enligt föreliggande uppfinning föreligger ett belagt skär bestående av en hårdmetallkropp med en sammansättning av 9,5- 10,5 vikt-%, företrädesvis 10,2 vikt-% Co, 1,0-2,0 vikt-%, fö- reträdesvis 1,4-1,6 vikt-%, total mängd kubiska karbider av metallerna Ti, Nb och Ta och rest WC. Ti, Ta och/eller Nb kan även ersättas av andra karbidbildande element från grupperna IVb, Vb eller VIb i det periodiska systemet. Innehållet av Ti är helst på en nivå motsvarande teknisk förorening. Förhållan- det mellan viktkoncentrationerna av Ta och Nb är inom 7,6- 11,4, företrädesvis 9-10.According to the present invention there is a coated insert consisting of a cemented carbide body with a composition of 9.5-10.5% by weight, preferably 10.2% by weight Co, 1.0-2.0% by weight, preferably 1 , 4-1.6% by weight, total amount of cubic carbides of the metals Ti, Nb and Ta and residual WC. Ti, Ta and / or Nb can also be replaced by other carbide-forming elements from groups IVb, Vb or VIb in the periodic table. The content of Ti is preferably at a level corresponding to technical pollution. The ratio between the weight concentrations of Ta and Nb is within 7.6-11.4, preferably 9-10.
Koboltbindefasen har medelhög till hög inlösning av vol- fram. Innehållet av W i bindefasen kan vara uttryckt som S- värdet = G/ 16,1, där 0 är uppmätt magnetiskt moment i binde- fasen i uTm3kg'1 S-värdet beror på innehållet av volfram i bindefasen och ökar med ett minskande volframinnehåll. För ren kobolt, eller för en bindefas som är mättad med kol, gäller 10 20 25 30 35 40 45 50 55 519 896 att S=l och för en bindefas som innehåller W i en sådan mängd att det motsvarar gränsen till bildning av n-fas gäller att S=0,78.The cobalt binder phase has medium to high redemption of tungsten. The content of W in the binder phase can be expressed as the S-value = G / 16.1, where 0 is measured magnetic moment in the binder phase in uTm3kg'1 The S-value depends on the content of tungsten in the binder phase and increases with a decreasing tungsten content. For pure cobalt, or for a binder phase saturated with carbon, it holds that S = 1 and for a binder phase containing W in such an amount that it corresponds to the limit of formation of n- phase, S = 0.78.
Enligt föreliggande uppfinning har det nu visat sig att förbättrade skärprestanda åstadkommes om hårdmetallkroppen har ett S-värde inom området 0,82-0,90, företrädesvis 0,85-0,89.According to the present invention, it has now been found that improved cutting performance is achieved if the cemented carbide body has an S-value in the range 0.82-0.90, preferably 0.85-0.89.
Vidare är kornstorleken hos volframkarbidfasen uttryckt som medelinterceptlängd uppmätt på ett slipat och polerat re- presentativt tvärsnitt i området 0,5-0,9 um, företrädesvis 0,6- 0,8 pm. Medelinterceptlängden är mätt med hjälp av bildanalys på bilder med en förstoring av l0O0Ox och beräknat som medel- värdet av ungefär 1000 interceptlängder.Furthermore, the grain size of the tungsten carbide phase is expressed as the mean intercept length measured on a ground and polished representative cross section in the range 0.5-0.9 μm, preferably 0.6-0.8 μm. The mean intercept length is measured using image analysis on images with a magnification of l0O0Ox and calculated as the mean value of approximately 1000 intercept lengths.
Beläggningen består av ett inre 2-8 um, företrädesvis 3 um, skikt av MTCVD Ti(C,N) och en K-Algh-TiN/Ti(C,N) multi- skiktsbeläggning.The coating consists of an inner 2-8 μm, preferably 3 μm, layer of MTCVD Ti (C, N) and a K-Algh-TiN / Ti (C, N) multilayer coating.
Denna multiskiktsbeläggning är sammansatt av en koldopad TiN-matris framställd med CVD-teknik (innehållande företrädes- vis mindre än 5 % kol) eller MTCVD Ti(C,N)- matris där tunna K- Alflb-skikt är inbäddade.This multilayer coating is composed of a carbon-doped TiN matrix prepared by CVD technology (preferably containing less than 5% carbon) or MTCVD Ti (C, N) matrix in which thin K-Al fl b layers are embedded.
Multiskiktsbeläggningen är sammansatt av K-Al2O3-skikt med en tjocklek av 0,1-0,4 um, företrädesvis 0,2-0,3 um och TiN- eller Ti(C,N)-skikt med en tjocklek av 0,3-0,6 pm, företrädes- vis omkring 0,4 pm. Det första och det sista lagret i multi- skiktsbeläggningen är ett K-A120; skikt. Ett TiN-skikt < 1 pm kan deponeras ovanpå det yttersta K- Al2O3-skiktet. Den totala tjockleken av multiskiktsbeläggningen kan vara från 2 um (to- talt; sju individuella skikt) till 20 pm (totalt: 41 indivi- duella skikt). Tunnare beläggning är att föredra vid tillämp- ningar med stort behov av seghet. Den tjockare beläggningen är för tillämpningar där hög slitstyrka behövs.The multilayer coating is composed of K-Al 2 O 3 layers with a thickness of 0.1-0.4 μm, preferably 0.2-0.3 μm and TiN or Ti (C, N) layers with a thickness of 0.3 -0.6 μm, preferably about 0.4 μm. The first and last layer in the multilayer coating is a K-A120; layer. A TiN layer <1 μm can be deposited on top of the outermost K-Al 2 O 3 layer. The total thickness of the multilayer coating can be from 2 μm (total; seven individual layers) to 20 μm (total: 41 individual layers). Thinner coating is preferred in applications with a high need for toughness. The thicker coating is for applications where high wear resistance is needed.
I en föredragen utföringsform bör multiskikts-beläggning- ens tjocklek vara från 2 till 8 pm, företrädesvis från 2,5 till 6 pm sammansatt av 3-6 koldopade TiN-skikt och 4-7 K-Al2O3 skikt.In a preferred embodiment, the thickness of the multilayer coating should be from 2 to 8 μm, preferably from 2.5 to 6 μm composed of 3-6 carbon doped TiN layers and 4-7 K-Al 2 O 3 layers.
Belagda skär enligt uppfinningen tillverkas med en sam- mansättning av 9,5-l0,5 vikt-%, företrädesvis 10,2 vikt-% Co, 1,0-2,0 vikt-%, företrädesvis l,4-1,6 vikt-% total mängd ku- biska karbider av metallerna Ti, Nb och Ta och rest WC. Ti, Ta och/eller Nb kan även ersättas av andra karbidbildande element från grupperna IVb, Vb eller VIb i det periodiska systemet.Coated inserts according to the invention are manufactured with a composition of 9.5-10.5% by weight, preferably 10.2% by weight of Co, 1.0-2.0% by weight, preferably 1.4-1.6 % by weight total amount of cubic carbides of the metals Ti, Nb and Ta and residual WC. Ti, Ta and / or Nb can also be replaced by other carbide-forming elements from groups IVb, Vb or VIb in the periodic table.
Innehållet av Ti är helst på en nivå motsvarande en teknisk förorening. Förhållandet mellan viktkoncentrationerna av Ta och Nb är inom 7,6-11,4, företrädesvis 9-10.The content of Ti is preferably at a level corresponding to a technical contamination. The ratio of the weight concentrations of Ta to Nb is within 7.6-11.4, preferably 9-10.
Den önskade medelinterceptlängden beror på kornstorleken hos ingående råvara och på malnings- och sintringsbetingelser och måste bestämmas experimentellt. Det önskade S-värdet beror på ingående råvara och sintringsbetingelser som måste bestäm- mas experimentellt.The desired average intercept length depends on the grain size of the raw material included and on grinding and sintering conditions and must be determined experimentally. The desired S-value depends on the raw material and sintering conditions that must be determined experimentally.
Ovanpå hårdmetallen deponeras ett första skikt av Ti(C,N) med MTCVD-teknik med användning av acetonitril som kol- och kvävekälla för bildande av skikt i temperaturintervallet 700- 900 °C.A first layer of Ti (C, N) is deposited on top of the cemented carbide with MTCVD technology using acetonitrile as a carbon and nitrogen source to form layers in the temperature range 700-900 ° C.
Ovanpå detta skikt deponeras därefter en multiskikts-be- läggning bestående av omväxlande skikt av K-Al2O3 och kol-dopad TiN eller MTCVD-Ti(C,N). Aluminiumoxidskikten deponeras enligt känd teknik. Koldopat TiN-skikt är deponerat enligt känd tek- nik.A multilayer coating consisting of alternating layers of K-Al2O3 and carbon-doped TiN or MTCVD-Ti (C, N) is then deposited on top of this layer. The alumina layers are deposited according to known techniques. Carbon-doped TiN layers are deposited according to known technology.
W U 20 25 30 35 40 45 50 55 519 896 Exempel Följande kombinationer av substrat och skikt valdes som exempel att demonstrera uppfinningen mera i detalj: Sort Substrat Beläggning I A(uppfinning) X(känd teknik) II B(uppfinning) X(känd teknik) III A(uppfinning) Y(uppfinning) IV A(uppfinning) Z(känd teknik) Substrat A: Ett hårdmetallsubstrat i enlighet med uppfin- ningen med sammansättningen 10,2 vikt-% Co, 1,35 vikt-% TaC, 0,15 vikt-% NbC och rest WC, med en bindefas legerad med W motsvarande ett S-värde av 0,87 framställdes genom konventio- nell malning av pulver, pressning av presskroppar följda av sintring vid l430°C. Undersökning av mikrostrukturen efter sintring visade att medelinterceptlängden hos volframkarbidfa- sen var 0,7 pm. Efter sintring slipades och eggbehandlades skä- ren.WU 20 25 30 35 40 45 50 55 519 896 Examples The following combinations of substrates and layers were chosen as examples to demonstrate the invention in more detail: Various Substrate Coating IA (invention) X (prior art) II B (invention) X (prior art) III A (invention) Y (invention) IV A (invention) Z (prior art) Substrate A: A cemented carbide substrate according to the invention having the composition 10.2% by weight of Co, 1.35% by weight of TaC, 0, 15% by weight of NbC and residual WC, with a binder phase alloyed with W corresponding to an S-value of 0.87 were prepared by conventional grinding of powder, pressing of compacts followed by sintering at 1430 ° C. Examination of the microstructure after sintering showed that the mean intercept length of the tungsten carbide phase was 0.7 μm. After sintering, the inserts were ground and edge treated.
Substrat B: Ett hårdmetallsubstrat i enlighet med uppfin- ningen med sammansättningen 9,7 vikt-% Co, 1,35 vikt-% TaC och 0,15 vikt-% NbC och rest WC, med en bindefas legerad med W motsvarande ett S-värde av 0,89 framställdes i analogi med substrat A ovan. Mikrostrukturen visade att medelinter- ceptlängden hos volframkarbidfasen var 0,8 um.Substrate B: A cemented carbide substrate according to the invention having the composition 9.7% by weight of Co, 1.35% by weight of TaC and 0.15% by weight of NbC and residual WC, with a binder phase alloyed with W corresponding to an S- value of 0.89 was prepared in analogy to substrate A above. The microstructure showed that the mean intercept length of the tungsten carbide phase was 0.8 μm.
Beläggning X (känd teknik): 5 um MTCVD Ti(C,N)+1 pm K-Al2O3 singelskikt deponerat ytterst.Coating X (prior art): 5 μm MTCVD Ti (C, N) +1 μm K-Al 2 O 3 single layer deposited on the outside.
Beläggning Y (uppfinning): 3,5 pm MTCVD Ti(C,N) + 3,0 pm multiskiktsbeläggning bestående av tre koldopade TiN-skikt och fyra K-Al2O3 + 0,5 pm toppskikt av TiN, Fig.1. Detta skiktet deponerades med användning av tidigare känd teknik.Coating Y (invention): 3.5 μm MTCVD Ti (C, N) + 3.0 μm multilayer coating consisting of three carbon-doped TiN layers and four K-Al 2 O 3 + 0.5 μm top layer of TiN, Fig.1. This layer was deposited using prior art.
Beläggning Z (känd teknik): 3 um Ti(C,N) +3 pm multi- skiktsbeläggning bestående av fyra K- Al2O3 och fem TiN-skikt där K-Al2O3 dominerar enligt tidigare känd teknik. K-Al2O3-skik- tet hade en tjocklek av 0,7 um. Denna beläggning var deponerad enligt US 5,700,569 och US 5,l37,774.Coating Z (prior art): 3 μm Ti (C, N) + 3 μm multi-layer coating consisting of four K-Al2O3 and five TiN layers where K-Al2O3 dominates according to the prior art. The K-Al2O3 layer had a thickness of 0.7 μm. This coating was deposited according to US 5,700,569 and US 5,137,774.
Exempel 1 Sort V.(känd teknik) Ett hårdmetallskär med samman-sätt- ningen 9 vikt-% Co, 0,45 vikt-% TaC och 0,05 vikt-% NbC rest WC och ett S-värde av 0,98 och med en sintrad medelinter- ceptlängd hos volframkarbidfasen av 1,2 um. Beläggningen av skäret var en konventionell CVD-beläggning bestående av Ti(C,N)+TiC+TiN med totaltjockleken 5,0 pm.Example 1 Sort V. (prior art) A cemented carbide insert with the composition 9 wt% Co, 0.45 wt% TaC and 0.05 wt% NbC residual WC and an S value of 0.98 and with a sintered mean intercept length of the tungsten carbide phase of 1.2 μm. The coating of the insert was a conventional CVD coating consisting of Ti (C, N) + TiC + TiN with a total thickness of 5.0 μm.
Sort VI.(känd teknik) Ett hårdmetallskär från en starkt ledande konkurrent valdes för jämförelse i ett svarvprov.Type VI. (Prior art) A cemented carbide insert from a strong leading competitor was selected for comparison in a turning sample.
Hårdmetallen hade en sammansättning av 9,0 vikt-% Co, 1,8 vikt-% TaC och 0,2 vikt-% NbC rest WC. Skäret har en belägg- ning bestående av TiC+TiN+TiC+TiN med en totaltjocklek av 4,0 pm.The cemented carbide had a composition of 9.0 wt% Co, 1.8 wt% TaC and 0.2 wt% NbC residual WC. The insert has a coating consisting of TiC + TiN + TiC + TiN with a total thickness of 4.0 μm.
Operation: Plansvarvning Arbetsstycke: Cylindriskstång Material: SS2333 skärtyp: cNMG12o4os Skärhastighet: 150 m/min Mätning: 0,2 mm/varv 10 15 20 25 30 35 40 45 50 55 519 896 5 Skärdjup: 2,5 mm Anmärkning: Kylning med skärvätska Resultat: Livslängd (min): Sort I 14,5 (substrat enl. uppfinning) Sort II 13,7 (substrat enl. uppfinning) Sort V 11,3 (känd teknik) Sort VI 12,5 (känd teknik) Livslängdskriterium var nedbrytning av skäreggen orsakad av urflisning av skäreggen. Provresultatet visar att hårdme- tallsubstratet enligt uppfinningen uppvisar längre livslängd än tidigare känd sort.Operation: Plane turning Workpiece: Cylindrical bar Material: SS2333 Cutting type: cNMG12o4os Cutting speed: 150 m / min Measurement: 0.2 mm / revolution 10 15 20 25 30 35 40 45 50 55 519 896 5 Cutting depth: 2.5 mm Remark: Cooling with cutting fluid Result: Lifespan (min): Type I 14.5 (substrate according to the invention) Type II 13.7 (substrate according to the invention) Type V 11.3 (prior art) Type VI 12.5 (prior art) Longevity criterion was degradation of the cutting edge caused by chipping of the cutting edge. The test result shows that the cemented carbide substrate according to the invention has a longer service life than the previously known variety.
Exempel 2 Sort VII.(känd teknik) Ett hårdmetallskär från en starkt ledande konkurrent valdes for jämförelse i ett svarvprov.Example 2 Type VII (prior art) A cemented carbide insert from a highly conductive competitor was selected for comparison in a turning sample.
Hårdmetallen hade en sammansättning av 10,5 vikt-% Co, 1,3 vikt-% TaC och 0,3 vikt-% NbC rest WC. Skäret har en belägg- ning bestående av Ti(C,N)+Al¿h+TiN med en totaltjocklek av 6,0 um.The cemented carbide had a composition of 10.5% by weight of Co, 1.3% by weight of TaC and 0.3% by weight of NbC residual WC. The insert has a coating consisting of Ti (C, N) + Al¿h + TiN with a total thickness of 6.0 μm.
Operation: Svarvning med repeterade korta ingreppstider (15 sekunder) Arbetsstycke: Cylindriskstång Material: SS2343 Skärtyp: cNMG12o4os Skärhastighet: 180 m/min Matning: 0,3 mm/varv Skärdjup: 1,5 mm Anmärkning: Ingen kylvätska.Operation: Turning with repeated short engagement times (15 seconds) Workpiece: Cylindrical bar Material: SS2343 Cutting type: cNMG12o4os Cutting speed: 180 m / min Feed rate: 0.3 mm / revolution Cutting depth: 1.5 mm Remark: No coolant.
Resultat: Livslängd (min): Sort III 13,8 (uppfinning) Sort IV 12,5 (substrat enl. uppfinning) Sort VII 12 (känd teknik) Livslängdskriterium var nedbrytning av skäreggen orsakad av urflisningar av skäreggen och strålförslitning vid skärdju- pet. Provresultatet visar att hårdmetallskäret enligt uppfin- ningen uppvisar längre livslängd än samma substrat belagt med annan typ av beläggning enligt känd teknik, samt även jämfört den viktiga konkurrentsorten.Result: Lifespan (min): Type III 13.8 (invention) Type IV 12.5 (substrate according to the invention) Type VII 12 (prior art) Lifetime criterion was degradation of the cutting edge caused by chipping of the cutting edge and beam wear at the depth of cut. The test results show that the cemented carbide insert according to the invention has a longer service life than the same substrate coated with another type of coating according to known technology, and also compared with the important competitor type.
Exempel 3 Operation: Svarvning med upprepade korta ingrepp (2-10 se- kunder).Example 3 Operation: Turning with repeated short interventions (2-10 seconds).
Arbetsstycke: Cylindriskstång Material: SS2343 Skärtyp: CNMGl20408 Skärhastighet: 200 m/min Matning: 0,2 mm/tand Skärdjup: 2,5 mm Anmärkning: Kylning med skärvätska.Workpiece: Cylindrical bar Material: SS2343 Cutting type: CNMGl20408 Cutting speed: 200 m / min Feed rate: 0.2 mm / tooth Cutting depth: 2.5 mm Remark: Cooling with cutting fluid.
Resultat: Livslängd (min.): Sort III 11 (uppfinning) W Ü 20 25 30 -519 896 6 Sort VI 8,5 Sort VII lO (känd teknik) (känd teknik) Livslängdskriterium var fasförslitning i kombination med urflisning av skäreggen. Provresultatet visar att hàrd-metall- verktyget enligt uppfinningen uppvisar längre livslängd än två viktiga konkurrenter.Result: Lifespan (min.): Type III 11 (invention) W Ü 20 25 30 -519 896 6 Type VI 8.5 Type VII 10 (known technique) (known technique) Lifetime criterion was phase wear in combination with chipping of the cutting edge. The test results show that the hard metal tool according to the invention has a longer service life than two important competitors.
Exempel 4 Operation: Kopiersvarvning Arbetsstycke: Gjuten detalj Material: SS2352 skärtyp; TNMG16o4os Skärhastighet: 180 m/min Mätning: 0,2 mm/varv Skärdjup: 0,85-4 mm Anmärkning: Svarvning med kylvätska Resultat: Livslängd (min): Sort I 24 (substrat enl. uppfinning) Sort III 28 (uppfinning) Sort VII 20 (känd teknik) Livslängdskriterium var ytfinhet hos arbetsstycket. Prov- resultatet visar att hårdmetallverktyget enligt uppfinningen uppvisar längre livslängd än både en tidigare känd sort och ett hàrdmetallverktyg med ett substrat enligt uppfinningen men med en tidigare känd beläggning.Example 4 Operation: Copy turning Workpiece: Cast part Material: SS2352 cutting type; TNMG16o4os Cutting speed: 180 m / min Measurement: 0.2 mm / rev Cutting depth: 0.85-4 mm Remark: Turning with coolant Result: Service life (min): Type I 24 (substrate according to invention) Type III 28 (invention) Type VII 20 (prior art) Lifetime criterion was surface finish of the workpiece. The test results show that the cemented carbide tool according to the invention has a longer service life than both a previously known variety and a cemented carbide tool with a substrate according to the invention but with a previously known coating.
Claims (5)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0000667A SE519896C2 (en) | 2000-02-29 | 2000-02-29 | Cutting tool insert used for wet and dry milling of low and medium alloyed steels and stainless steels, comprises cemented carbide body and coating |
AT00125483T ATE273405T1 (en) | 1999-11-25 | 2000-11-21 | COATED CUTTING INSERT FOR MILLING AND TURNING APPLICATIONS |
EP00125483A EP1103635B1 (en) | 1999-11-25 | 2000-11-21 | Coated cutting insert for milling and turning applications |
DE60012850T DE60012850T2 (en) | 1999-11-25 | 2000-11-21 | Coated cutting insert for milling and turning applications |
US09/717,006 US6632514B1 (en) | 1999-11-25 | 2000-11-22 | Coated cutting insert for milling and turning applications |
IL13986600A IL139866A (en) | 1999-11-25 | 2000-11-23 | Coated cemented carbide cutting tool insert |
JP2000359158A JP2001205505A (en) | 1999-11-25 | 2000-11-27 | Coated cutting insert for application to milling and lathing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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SE0000667A SE519896C2 (en) | 2000-02-29 | 2000-02-29 | Cutting tool insert used for wet and dry milling of low and medium alloyed steels and stainless steels, comprises cemented carbide body and coating |
Publications (3)
Publication Number | Publication Date |
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SE0000667D0 SE0000667D0 (en) | 2000-02-29 |
SE0000667L SE0000667L (en) | 2001-08-30 |
SE519896C2 true SE519896C2 (en) | 2003-04-22 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SE0000667A SE519896C2 (en) | 1999-11-25 | 2000-02-29 | Cutting tool insert used for wet and dry milling of low and medium alloyed steels and stainless steels, comprises cemented carbide body and coating |
Country Status (1)
Country | Link |
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SE (1) | SE519896C2 (en) |
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SE0000667D0 (en) | 2000-02-29 |
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