Sandvik Intellectual Property Ab

Ab Sandvik Coromant

Jan Engqvist

Erik Lindahl

Linus Von Fieandt

Erik Holmstrom

Andreas Blomqvist

Raluca Brenning

Raluca Morjan Brenning

Susanne Norgren

Tommy Larsson

Ake Ostlund

Dirk Stiens

Carl-Johan Maderud

Leif E Akesson

Carl Bjormander

Sakari Ruppi

Hindrik Engstrom

Oscar Alm

Jonny Edman

Åke Östlund

Anders Stenberg

Elias Forssbeck Nyrot

Ernesto Coronel

Jonas Lauridsen

Peter Matsson

Erik HOLMSTRÖM

Carl BJÖRMANDER

ÅKe ÖStlund

A coated cutting tool has a CVD coated and a substrate of a cemented carbide, wherein the metallic binder in the cemented carbide includes Ni. The CVD coating has an inner layer of TiN and a subsequent layer of TiCN. The C-activity relative to graphite in the metallic binder is lower than 0.15 and an average d electron value of the metallic binder is 7.00-7.43, wherein an interface between the substrate and the inner TiN layer is free of Ti-containing intermetallic phase.

Coated cutting tool

A coated cutting tool has a CVD coating and a substrate of a cemented carbide, wherein the metallic binder in the cemented carbide includes Ni. The CVD coating has an inner layer of TiN and a subsequent layer of TiCN. A C-activity relative to graphite in the metallic binder is lower than 0.15 and an average d electron value of the metallic binder is 7.00-7.43, wherein an interface between the substrate and the inner TiN layer is free of Ti-containing intermetallic phase.

A coated cutting tool is CVD coated and includes a substrate of a cemented carbide, wherein the metallic binder in the cemented carbide Includes Ni. The CVD coating includes an inner layer of TiN and a subsequent layer of TiCN.

A coated cutting tool having a substrate and a coating is provided. The coating includes an inner &#x3b1;-AlO-multilayer and an outer &#x3b1;-AlO-single-layer. The thickness of the inner &#x3b1;-AlO-multilayer is less than or equal to 35% of the sum of the thickness of the inner &#x3b1;-AlO-multilayer and the thickness of the outer &#x3b1;-AlO-single-layer. The sum of the thickness of the inner &#x3b1;-AlO-multilayer and the outer &#x3b1;-AlO-single-layer is 2-15 &#x3bc;m. The inner &#x3b1;-AlO-multilayer consists of alternating sublayers of &#x3b1;-AlOand sublayers of TiCO, TiCNO, AlTiCO or AlTiCNO. The inner &#x3b1;-AlO-multilayer can include at least 5 sublayers of &#x3b1;-AlO.

A coated cutting tool includes a multilayer of alternating sublayers of &#x3ba;-AlOand sublayers of TiN, TiC, TiCN, TiCO or TiCNO. The multilayer includes at least 3 sublayers of &#x3ba;-AlO. The multilayer further exhibits an XRD diffraction over a &#x3b8;-2&#x3b8; scan of 15&#xb0;-140&#xb0;, wherein the 0 0 2 diffraction peak (peak area) is the strongest peak originating from the &#x3ba;-AlOsublayers of the multilayer.

A coated cutting tool includes a substrate and a coating. The coating has an &#x3b1;-AlO-multilayer of alternating sublayers of &#x3b1;-AlOand sublayers of TiCO, TiCNO, AlTiCO or AlTiCNO. The &#x3b1;-AlO-multilayer includes at least 5 sublayers of &#x3b1;-AlO, wherein the total thickness of the &#x3b1;-AlO-multilayer is 1-15 &#x3bc;m and wherein a period in the &#x3b1;-AlO-multilayer is 50-900 nm. The &#x3b1;-AlO-multilayer exhibits an XRD diffraction over a &#x3b8;-2&#x3b8; scan of 20&#xb0;-140&#xb0;, wherein the relation of the intensity of the 0 0 12 diffraction peak (peak area), I(0 0 12), to the intensities of the 1 1 3 diffraction peak (peak area), I(1 1 3), the 1 1 6 diffraction peak (peak area), I(1 1 6), and the 0 2 4 diffraction peak (peak area), I(0 2 4), is I(0 0 12)/I(1 1 3)&#x3e;1, I(0 0 12)/I(1 1 6)&#x3e;1 and I(0 0 12)/I(0 2 4)&#x3e;1.

A coated cutting tool includes a substrate and a coating of one of more layers. The coating includes a layer of &#x3b1;-AlOof a thickness of 1-20 &#x3bc;m deposited by chemical vapour deposition (CVD). The &#x3b1;-AlOlayer exhibits an X-ray diffraction pattern and wherein the texture coefficient TC(h k 1) is defined according to the Harris formula, wherein 1&#x3c;TC(0 2 4)&#x3c;4 and 3&#x3c;TC(0 0 12)&#x3c;6.

CVD coated cutting tool

A coated cutting tool for chip forming machining of metals includes a substrate having a surface coated with a chemical vapour deposition (CVD) coating. The substrate is coated with a coating having a layer of &#x3b1;-AlO, wherein the &#x3b1;-AlOlayer exhibits a texture coefficient TC(0 0 12)&#x2265;7.2 and wherein the ratio of I(0 0 12)/I(0 1 14)&#x2265;0.8. The coating further includes a MTCVD TiCN layer located between the substrate and the &#x3b1;-AlOlayer. The MTCVD TiCN layer exhibits a pole figure, as measured by EBSD, in a portion of the MTCVD TiCN layer parallel to the outer surface of the coating and less than 1 &#x3bc;m from the outer surface of the MTCVD TiCN, wherein a pole plot based on the data of the pole figure, with a bin size of 0.25&#xb0; over a tilt angle range of 0&#xb0;&#x2264;&#x3b2;&#x2264;45&#xb0; from the normal of the outer surface of the coating shows a ratio of intensity within &#x3b2;&#x2264;15&#xb0; tilt angle to the intensity within 0&#xb0;&#x2264;&#x3b2;&#x2264;45&#xb0; of &#x2265;45%.

A coated cutting tool of a cemented carbide substrate made of WC, a metallic binder phase and a gamma phase has a well distributed gamma phase and a reduced amount of abnormal WC grains. Further, the coated cutting tool is provided with a CVD coating of TiCN and an &#x3b1;-AlOlayer, wherein the &#x3b1;-AlOlayer exhibits a texture coefficient TC(0 0 12)&#x2265;7.2 and wherein in the ratio I(0 0 12)/I(0 1 14)&#x2265;1. The coated cutting tool has an increased resistance against plastic deformation. whilst maintaining toughness.

The present disclosure relates to a coated cutting tool having a substrate and a coating, wherein the coating includes at least one layer of &#x3ba;-AlOwith a thickness of 1-20 &#x3bc;m deposited by chemical vapour deposition (CVD). A &#x3c7;-scan from &#x2212;80&#xb0; to 80&#xb0; over the (0 0 6) reflection of the &#x3ba;-AlOlayer shows the strongest peak centered around 0&#xb0; and the full width half maximum (FWHM) of the peak is &#x3c;25&#xb0;.

CVD coated cutting tool with {0 0 1} textured &#x3ba;-AlOlayer

A coated cutting tool for chip forming machining of metals includes a substrate having a surface coated with a chemical vapour deposition (CVD) coating. The coated cutting tool has a substrate coated with a coating including a layer of &#x3b1;-Al2O3, wherein the &#x3b1;-Al2O3 layer exhibits a dielectric loss of 10&#x2212;6&#x2264;tan &#x3b4;&#x2264;0.0025, as measured with AC at 10 kHz, 100 mV at room temperature of 20&#xb0; C.

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 &#x3bc;m, including one or more layers having a wear resistant layer of &#x3b1;-AlOof a thickness of 1 to 45 &#x3bc;m deposited by chemical vapour deposition (CVD). The &#x3b1;-AlOlayer 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 &#x3b1;-AlOgrain 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 &#x3b1;-AlOgrains undergo a directional change into a direction that is essentially perpendicular, 90&#xb1;45 degrees, to the grain boundaries in the first thickness portion.

Alumina coated cutting tool

A coated cutting tool for chip forming machining of metals includes a substrate having a surface coated with a chemical vapour deposition (CVD) coating. The coating has a layer of &#x3b1;-AlO, wherein the &#x3b1;-AlOlayer exhibits a texture coefficient TC(0 0 12)&#x2265;7.2 and wherein the ratio of I(0 0 12)/I(0 1 14) is &#x2265;1.

A coated cutting tool comprising substrate and a coating, wherein the coating comprises a layer of MTCVD TiCN, and a layer of &#x3b1;-AlO, wherein the &#x3b1;-AlOlayer exhibits an X-ray diffraction pattern, as measured using CuK&#x3b1; radiation, the (hkl) reflections used are (012), (104), (110), (113), (116), (300), (214) and (0 0 12), and the TC(0 0 12) is higher than 5 and a full width half maximum (FWHM) of a rocking curve peak of the (0 0 12) plane of the &#x3b1;-AlOis lower than 30&#xb0;.

Growing community of inventors

Uppsala, Sweden

Jan Engqvist