Abstract: A coated cutting tool includes a substrate of cemented carbide, cermet, ceramics, steel or cubic boron nitride, a multi-layered wear resistant coating and at least two refractory coating layers deposited. The at least two refractory coating layers include a first coating layer and a second coating layer deposited on top of each other. The first coating layer is titanium aluminum nitride or carbonitride Ti1-uAluCvNw, with 0.2?u?1.0, 0?v?0.25 and 0.7?w?1.15 deposited by CVD. The second coating layer is titanium carbonitride TixCyN1-y, with 0.85?x?1.1 and 0.4?y?0.85, and is deposited on top of the first coating layer by MT-CVD. The second TixCyN1-y coating layer has a columnar grain morphology and the overall fiber texture of the TixCyN1-y coating layer is characterized by a texture coefficient TC (1 1 1)>2.

Abstract: A coated cutting tool insert includes a substrate of cemented carbide, cermet, ceramics, steel or cubic boron nitride having deposited thereon a coating having a total thickness of 60 ?m, including one or more layers having a wear resistant layer of ?-Al2O3 of a thickness of 1 to 45 ?m deposited by chemical vapour deposition (CVD). The ?-Al2O3 layer includes at least two portions, a first thickness portion and a second thickness portion immediately on top of the first thickness portion. The first thickness portion has an essentially columnar ?-Al2O3 grain structure, and at a transition from the first thickness portion to the second thickness portion the grain boundaries of at least 1 out of 25 neighboring grains of the ?-Al2O3 grains undergo a directional change into a direction that is essentially perpendicular, 90±45 degrees, to the grain boundaries in the first thickness portion.

Abstract: A tool has a main part of hard metal, cermet, ceramic, steel, high-speed steel, and a single or multilayer wear protection coating applied onto the main part by CVD and which has a thickness from 3 ?m to 25 ?m. The wear protection coating has at least one Ti1?xAlxCyNz layer with stoichiometric coefficients 0.70?x<1.0?y<0.25 and 0.75?z<1.15 and a thickness from 1.5 ?m to 17 ?m. The T1?xAlxCyNz layer has a lamellar structure with lamellae with thickness of no more than 150 nm, preferably no more than 100 nm, particularly preferably no more than 50 nm. Lamellae are made of periodically alternating regions of the Ti1?xAlxCyNz layer with alternatingly different stoichiometric proportions of Ti and Al, having the same crystal structure (crystallographic phase), and the Ti1?xAlxCyNz layer has at least 90% vol. % of face centered cubic (fcc) crystal structure.

Abstract: A tool having a base body of carbide, cermet, ceramic, steel or high speed steel and a single-layer or multi-layer wear-protection coating applied thereto in a CVD process, wherein the wear-protection coating has at least one Ti1-xAlxCyNz layer having stoichiometry coefficients 0.70?x<1.0?y<0.25 and 0.75?z<1.15 wherein the Ti1-xAlxCyNz layer is of a thickness of 1 ?m to 25 ?m and has a crystallographic preferential orientation, which is characterized by a ratio of the intensities of the X-ray diffraction peaks of the crystallographic {111} plane and the {200} plane, wherein I{111}/I{200}>1+h (ln h)2, wherein h is the thickness of the Ti1-xAlxCyNz layer in micrometer.

Abstract: A coated cutting tool includes a substrate of cemented carbide, cermet, ceramics, steel or cubic boron nitride, a multi-layered wear resistant coating and at least two refractory coating layers deposited. The at least two refractory coating layers include a first coating layer and a second coating layer deposited on top of each other. The first coating layer is titanium aluminium nitride or carbonitride Ti1-uAluCvNw, with 0.2?u?1.0, 0?v?0.25 and 0.7?w?1.15 deposited by CVD. The second coating layer is titanium carbonitride TixCyN1-y, with 0.85?x?1.1 and 0.4?y?0.85, and is deposited on top of the first coating layer by MT-CVD. The second TixCyN1-y coating layer has a columnar grain morphology and the overall fiber texture of the TixCyN1-y coating layer is characterized by a texture coefficient TC (1 1 1)>2.

Abstract: A coated cutting tool insert includes a substrate of cemented carbide, cermet, ceramics, steel or cubic boron nitride having deposited thereon a coating having a total thickness of 60 ?m, including one or more layers having a wear resistant layer of ?-Al2O3 of a thickness of 1 to 45 ?m deposited by chemical vapour deposition (CVD). The ?-Al2O3 layer includes at least two portions, a first thickness portion and a second thickness portion immediately on top of the first thickness portion. The first thickness portion has an essentially columnar ?-Al2O3 grain structure, and at a transition from the first thickness portion to the second thickness portion the grain boundaries of at least 1 out of 25 neighboring grains of the ?-Al2O3 grains undergo a directional change into a direction that is essentially perpendicular, 90±45 degrees, to the grain boundaries in the first thickness portion.

Abstract: A tool has a main part of hard metal, cermet, ceramic, steel, high-speed steel, and a single or multilayer wear protection coating applied onto the main part by CVD and which has a thickness from 3 ?m to 25 ?m. The wear protection coating has at least one Ti1-xAlxCyNz layer with stoichiometric coefficients 0.70?x<1.0?y<0.25 and 0.75?z<1.15 and a thickness from 1.5 ?m to 17 ?m. The T1-xAlxCyNz layer has a lamellar structure with lamellae with thickness of no more than 150 nm, preferably no more than 100 nm, particularly preferably no more than 50 nm. Lamellae are made of periodically alternating regions of the Ti1-xAlxCyNz layer with alternatingly different stoichiometric proportions of Ti and Al, having the same crystal structure (crystallographic phase), and the Ti1-xAlxCyNz layer has at least 90% vol. % of face centered cubic (fcc) crystal structure.

Abstract: A tool having a base body of carbide, cermet, ceramic, steel or high speed steel and a single-layer or multi-layer wear-protection coating applied thereto in a CVD process, wherein the wear-protection coating has at least one Ti1-xAlxCyNz layer having stoichiometry coefficients 0.70?x<1.0?y<0.25 and 0.75?z<1.15 wherein the Ti1-xAlxCyNz layer is of a thickness of 1 ?m to 25 ?m and has a crystallographic preferential orientation, which is characterised by a ratio of the intensities of the X-ray diffraction peaks of the crystallographic {111} plane and the {200} plane, wherein I{111}/I{200}>1+h (In h)2, wherein h is the thickness of the Ti1-xAlxCyNz layer in micrometer.

Abstract: Cutting insert made of hard metal, cermet or ceramic substrate body with multi-layer coating applied thereto by CVD methods. The coating has a total thickness of 5 to 40 ?m and, starting from the substrate surface, has one or more hard material layers, an alpha aluminum oxide (?-Al2O3) layer of a layer thickness of 1 to 20 ?m and optionally at least portion-wise over the ?-Al2O3 layer one or more further hard material layers as decorative or wear recognition layers. The ?-Al2O3 layer has a crystallographic preferential orientation characterized by a texture coefficient TC (0 0 12)?5 for the (0 0 12) growth direction. The ?-Al2O3 layer has an inherent stress in the region of 0 to +300 MPas, and the substrate within a region of 0 to 10 ?m from the substrate surface has an inherent stress minimum in the region of ?2000 to ?400 MPas.

Abstract: Cutting tool insert has a substrate and a coating with a total thickness of 5 to 40 ?m, the coating being one or more refractory layers of which at least one layer is an ?-Al2O3 layer having thickness of 1 to 20 ?m. The length of ?3-type grain boundaries in the at least one ?-Al2O3 layer is more than 80% of the total length of the sum of grain boundaries of ?3, ?7, ?11, ?17, ?19, ?21, ?23 and ?29-type grain boundaries (grain boundary character distribution measured by EBSD). The at least one ?-Al2O3 layer is deposited by chemical vapor deposition (CVD) using reaction gases comprising H2, CO2, AlCl3 and X and optional additions of N2 and Ar, with X being gaseous H2S, SO2, HF, SF6 or combinations thereof. The volume ratio of CO2 and X in the CVD reaction chamber lies within the range 2<CO2/X<10.

Abstract: Cutting tool insert has a substrate and a coating with a total thickness of 5 to 40 ?m, the coating being one or more refractory layers of which at least one layer is an ?-Al2O3 layer having thickness of 1 to 20 ?m. The length of ?3-type grain boundaries in the at least one ?-Al2O3 layer is more than 80% of the total length of the sum of grain boundaries of ?3, ?7, ?11, ?17, ?19, ?21, ?23 and ?29-type grain boundaries grain boundary character distribution measured by EBSD. The at least one ?-Al2O3 layer is deposited by chemical vapour deposition (CVD) using reaction gases comprising H2, CO2, AlCl3 and X and optional additions of N2 and Ar, with X being gaseous H2S, SO2, HF, SF6 or combinations thereof. The volume ratio of CO2 and X in the CVD reaction chamber lies within the range 2<CO2/X<10.

Abstract: Cutting insert made of hard metal, cermet or ceramic substrate body with multi-layer coating applied thereto by CVD methods. The coating has a total thickness of 5 to 40 ?m and, starting from the substrate surface, has one or more hard material layers, an alpha aluminium oxide (?-Al2O3) layer of a layer thickness of 1 to 20 ?m and optionally at least portion-wise over the ?-Al2O3 layer one or more further hard material layers as decorative or wear recognition layers. The ?-Al2O3 layer has a crystallographic preferential orientation characterised by a texture coefficient TC (0 0 12)?5 for the (0 0 12) growth direction. The ?-Al2O3 layer has an inherent stress in the region of 0 to +300 MPas, and the substrate within a region of 0 to 10 ?m from the substrate surface has an inherent stress minimum in the region of ?2000 to ?400 MPas.

Abstract: Cutting tool insert has a substrate and a coating of one or more refractory layers of which at least one layer is an ?-Al2O3 layer having thickness of 1 to 25 ?m, sulphur content of more than 100 ppm analysed by Secondary Ion Mass Spectroscopy (SIMS), and texture coefficient TC (0 0 12)>4 for the (0 0 12) growth direction. The at least one ?-Al2O3 layer is deposited by chemical vapour deposition (CVD) using reaction gases comprising H2, CO2, AlCl3 and X, with X being H2S, SO2, SF6, or combinations thereof, and optional additions of N2 and Ar. The amount of X is at least 1.0 vol-% of the total volume of gases in the reaction chamber. The volume ratio of CO2 and X in the reaction chamber lies within the range of 1?CO2/X?7 during deposition of the at least one ?-Al2O3 layer.

Abstract: An ?-Al2O3 coated cutting tool insert combining a cemented carbide with a binder phase enriched surface zone and a textured ?-Al2O3-layer is disclosed. The ?-Al2O3 layer has a thickness ranging from about 2-9 ?m and is composed of columnar grains having a length/width ratio from about 2-12. It is characterized by a strong (104) growth texture and by low intensity of the (012), (110) and (113) diffraction peaks. The textured ?-Al2O3 is preferably deposited on an MTCVD Ti(C,N) layer having a thickness from about 2-10 ?m. When the alumina layer is the uppermost layer, it may be wet-blasted to an Ra value of <about 1 ?m, giving the tool a black and shiny appearance.

Abstract: The present invention relates to a coated cutting tool insert comprising a substrate and a coating to be used in metal machining. The hard and wear resistant coating exhibits an excellent adhesion to the substrate covering all functional parts thereof. The coating is composed of one or more refractory layers of which at least one layer is ?-Al2O3 showing a strong growth texture along <001>. The ?-Al2O3 layer has a thickness ranging from 1 to 20 ?m and is composed of columnar grains with a length/width ratio of 2 to 15. The layer is characterised by a strong (006) diffraction peak, measured using XRD, and by low intensity of (012), (104), (113) (024) and (116) diffraction peaks. The <001>textured ?-Al2O3 layers is deposited in a temperature range of 750-1000° C. The texture is controlled by a specific nucleation procedure combined with the use of sulphur- and fluorine containing dopants.

Abstract: The present invention relates to a coated cutting tool insert comprising a substrate and a coating to be used in metal machining. The hard and wear resistant coating exhibits an excellent adhesion to the substrate covering all functional parts thereof. The coating is composed of one or more refractory layers of which at least one layer is ?-Al2O3 showing a strong growth texture along <001>. The ?-Al2O3 layer has a thickness ranging from 1 to 20 ?m and is composed of columnar grains with a length/width ratio of 2 to 15. The layer is characterized by a strong (006) diffraction peak, measured using XRD, and by low intensity of (012), (104), (113) (024) and (116) diffraction peaks. The <001> textured ?-Al2O3 layers is deposited in a temperature range of 750-1000° C. The texture is controlled by a specific nucleation procedure combined with the use of sulphur- and fluorine containing dopants.

Abstract: A refined method to produce textured ?-Al2O3 layers in a temperature range of 750-1000° C. with a controlled texture and substantially enhanced wear resistance and toughness than the prior art is disclosed. The ?-Al2O3 layer is formed on a bonding layer of (Ti,Al)(C,O,N) with increasing aluminum content towards the outer surface. Nucleation of ?-Al2O3 is obtained through a nucleation step composed of short pulses and purges of Ti-containing and oxidizing steps. The ?-Al2O3 layer has a thickness ranging from 1 to 20 ?m and is composed of columnar grains. The length/width ratio of the alumina grains is from 2 to 15, preferably 6 to 10. The layer is characterized by a strong (110) growth texture, measured using XRD, and by the low intensity of (012), (104), (113), (024) and (116) diffraction peaks.

Abstract: Wear resistance of the prior-art Ti(C,N) layers can be considerably enhanced by optimizing the grain size and microstructure. This invention describes a method to obtain controlled, fine, equiaxed grain morphology in Ti(C,N) layers produced using moderate temperature CVD (MTCVD). The method includes the step of doping using CO, CO2, ZrC14 and A1C13 or combinations of these to control the grain size and shape. Doping has to be controlled carefully in order to avoid nanograined structures and oxidization. Doping is further controlled to produce grain size that is from about 50 to about 300 nm, preferably from about 50 to about 150; a lack of any strong preferred growth orientation; and a length-to-width ratio (L/W) of less than 3 and only with a slight to moderate XRD line broadening.

Abstract: The present invention relates to a coated cutting tool insert and a texture-hardened ?-Al2O3 layer to be used in metal machining. The alumina layer is characterized by the improved toughness and it adheres to the substrate covering all functional parts thereof. The coating is composed of one or more refractory layers of which at least one layer is a texture-hardened ?-Al2O3 having a thickness ranging from 2 to 20 ?m being composed of columnar grains with a length/width ratio of 2 to 12. The ?-Al2O3 exhibits a strong (0006) diffraction peak. The improved wear resistance and toughness can be obtained when the texture coefficient (TC) for the (0006) reflection is larger than 1.33 ln h+2, where h is the ?-Al2O3 layer thickness and when the surface of the ?-Al2O3 layer is wet-blasted to an Ra-value <1 ?m. The alumina layer with a strong (0001) texture is applied on Binder phase enriched cemented carbide substrates. This combination contributes to enhanced wear resistance and toughness.

Abstract: A new and refined method to produce ?-Al2O3 layers in a temperature range of from about 750 to about 1000° C. with a controlled growth texture and substantially enhanced wear resistance and toughness than the prior art is disclosed. The ?-Al2O3 layer of the present invention is formed on a bonding layer of (Ti,Al)(C,O,N) with increasing aluminium content towards the outer surface. Nucleation of ?-Al2O3 is obtained through a nucleation step being composed of short pulses and purges consisting of Ti/Al-containing pulses and oxidising pulses. The ?-Al2O3 layer according to the present invention has a thickness ranging from about 1 to about 20 ?m and is composed of columnar grains. The length/width ratio of the alumina grains is from about 2 to about 12, preferably from about 4 to about 8. The layer is characterized by a strong (104) growth texture, measured using XRD, and by low intensity of (012), (110), (113), (024) and (116) diffraction peaks.