Sumitomo Electric Hardmetal Corp.

Sumitomo Electric Industries, Limited

Minoru Itoh

Yoshio Okada

Susumu Okuno

Shinya Imamura

Naoya Omori

Anongsack Paseuth

Hideaki Kanaoka

Norihiro Takanashi

Hiroyuki Morimoto

Chie Suzuki

Keiichi Tsuda

Kazuo Yamagata

Chikako Kojima

Takahiro Ichikawa

Hideki Moriguchi

Akira Sakamoto

H Moriguchi

A surface coated member having improved stability and a longer service life is provided. The surface coated member includes a base member and a hard coating formed on a surface thereof. The hard coating is constituted of one or more layers. At least one layer among the layers is a layer including hard particles. The hard particles include a multilayer structure having a first unit layer and a second unit layer being layered alternately. The first unit layer includes a first compound. The second unit layer includes a second compound. The first compound and the second compound are respectively made of one or more kind of element selected from the group consisting of a group 4 element, a group 5 element, a group 6 element of a periodic table, and Al, and one or more kind of element selected from the group consisting of B, C, N, and O.

Surface coated member and method for manufacturing same

A surface coated member having improved stability and a longer service life is provided. The surface coated member of the present invention includes a base member and a hard coating formed on a surface thereof. The hard coating is constituted of one or more layers. At least one of the layers is formed by a CVD method and includes a multilayer structure having a first unit layer and a second unit layer being layered alternately. The first unit layer includes a first compound containing Ti and one or more kind of element selected from the group consisting of B, C, N, and O. The second unit layer includes a second compound containing Al and one or more kind of element selected from the group consisting of B, C, N, and O.

A surface-coated cutting tool of the present invention includes a base material and a coating film formed on the base material. The coating film includes at least one TiBlayer. The TiBlayer includes Cl together with TiB. This surface-coated cutting tool is characterized in that assuming that in the TiBlayer, a first region represents a region having a thickness of 0.5 &#x3bc;m from an interface on the base material side, and a second region represents a region having a thickness of 0.5 &#x3bc;m from an interface on the coating film surface side, an atomic ratio Cl/(Ti+Cl) between Ti and Cl is higher in the first region than in the second region.

Surface-coated cutting tool and method of manufacturing the same

A surface-coated cutting tool of the present invention includes a base material and a coating film formed on the base material. The coating film includes at least one TiBlayer. The TiBlayer includes Cl together with TiB. This surface-coated cutting tool is characterized in that assuming that in the TiBlayer, a first region represents a region having a thickness of 0.5 &#x3bc;m from an interface on the base material side, and a second region represents a region having a thickness of 0.5 &#x3bc;m from an interface on the coating film surface side, an atomic ratio Cl/(Ti+Cl) between Ti and Cl is higher in the second region than in the first region.

A surface coated cutting tool with a high level of both wear resistance and defect resistance in balance is provided. The surface coated cutting tool of the present invention includes a base material, and a coat film formed on the base material. The coat film includes at least one titanium carbonitride layer. The titanium carbonitride layer has a maximum value for an orientational index TC (220) among texture coefficients TC (hkl). When an indentation hardness of a standard block for hardness is Hs and an indentation hardness of the titanium carbonitride layer is Ht, the average value of the relative hardness Ht/Hs for a plurality of times of measurement is greater than or equal to 3. The difference between the maximum value Ht/Hs and minimum value Ht/Hs of the relative hardness of the titanium carbonitride layer to the relative hardness Ht/Hs is less than or equal to 0.5.

Surface coated cutting tool

Wear resistance and chipping resistance are both highly established for a surface-coated cutting tool. The surface-coated cutting tool of the present invention includes a base material and a coat film formed on the base material. A first coat layer at a chamfer portion has residual stress that exhibits a minimal value at a depth A within 2 &#x3bc;m from the surface, and that is greater than or equal to &#x2212;7 GPa and less than or equal to &#x2212;1 GPa.

Surface-coated cutting tool

A surface-coated cutting tool having excellent abrasion resistance and defect resistance is provided. The surface-coated cutting tool includes a substrate and a covering layer, wherein the covering layer includes one or two or more sublayers, a thickness Tof a portion of the covering layer having the smallest thickness in a cutting edge line portion and a thickness Tof the covering layer at a point 1 mm away from a cutting edge line in a rake face direction in a cross section cut by a particular plane satisfy T&#x3c;T, and a point a on the surface of the covering layer a distance Daway from the cutting edge line in the rake face direction and a point b on the surface of the covering layer a distance Daway from the cutting edge line in a flank face direction satisfy particularly numerical ranges of Dand D, and in 10% or more of a region E of the covering layer having a thickness in the range of 0.1 Tto 0.9 Tfrom the surface and extending from the point a to the point b, the deviation in the crystal orientation of crystal grains constituting the covering layer is 5 degrees or more and less than 10 degrees.

A surface-coated cutting tool includes a coating layer () formed on a substrate (), wherein assuming that the average thickness of the coating layer () on a first surface () and a second surface () of the substrate () is A, a difference between the maximum and minimum thicknesses of the coating layer () is larger than 0.04&#xd7;A. Also, a surface-coated cutting tool includes a coating layer () formed on a substrate (), wherein assuming that the average thickness of the coating layer () on a first surface () of the substrate () is B1, and the average thickness of the coating layer () on a second surface () of the substrate () is B2, a value obtained by dividing an absolute difference value between B1 and B2 by a larger value of B1 and B2 is larger than 0.04.

An indexable insert () includes a substrate () and a coating layer formed on the substrate. The coating layer includes an inner layer and an outer layer. The inner layer is constituted by a layer containing at least one element selected from the group consisting of Group IVa elements, Group Va elements, and Group VIa elements in the periodic table, and Al and Si. The uppermost layer of the inner layer in contact with the outer layer is composed of a compound at least containing Ti and at least one of nitrogen and boron. The outer layer is constituted by an alumina layer or an alumina-containing layer. In a region involved in cutting, the outer layer satisfies B/A&#x2266;0.9 where A &#x3bc;m is the average thickness at the flank face () side and B &#x3bc;m is the average thickness at the rake face () side.

Indexable insert

A coated cutting insert according to the present invention includes a substrate, a base layer formed on the substrate, and an indicating layer formed on a part of the base layer. The base layer exhibits a color different from that of the indicating layer. The indicating layer is formed on the base layer, in at least a part of a surface including a cutting-edge portion and a rake face except for a flank face. When a surface relative roughness Ra of a breaker recess portion or a land portion of the rake face is set to A&#x3bc;m and a surface relative roughness Ra of the flank face is set to B&#x3bc;m, relation of B/A&#x2266;is established.

Coated cutting insert and manufacturing method thereof

An indexable cutting insert () includes a base () and a coating layer, wherein the coating layer includes an inner sublayer and an outer sublayer, each of subsublayer constituting the inner sublayer is composed of a compound containing at least one element selected from the group consisting of Group IVa elements, Group Va elements, Group VIa elements in the periodic table, Al, and Si, the outer sublayer is an alumina sublayer or a sublayer containing aluminum, and in portions of the outer sublayer participating in cutting, when an average thickness on the flank face (3) side is represented by A &#x3bc;m and an average thickness on the rake face (2) side is represented by B &#x3bc;m, A/B&#x2266;0.95.

Indexable cutting insert

The present invention relates to a surface-coated cutting tool comprising a substrate and a coating formed on the substrate, the coating includes a first coating of TiCN and a second coating of &#x3b1;-type AlO, the first coating is located between the substrate and the aforementioned second coating, and the second coating has compressive stress Sin an area Aspreading from an insert ridge portion in the direction of a rake face and the direction of a flank face with distances of at least 0.5 mm respectively and has tensile stress Sin an area Aother than this area A, while compressive stress Sand tensile stress Sare defined by the following expression (I):400 MPa&#x2266;|1&#x2212;2|&#x2266;3500 Mpa &#x2003;&#x2003;(I).

A coated cutting insert according to the present invention includes a base layer formed on a substrate and an indicating layer formed on a part of the base layer. The indicating layer is formed on a flank face, on the base layer on the entire surface or a part of a region Aexcept for a specific region A, and on a rake face, on the base layer on the entire surface or a part of a region Bexcept for a specific region B. In the region Aand the region B, the base layer is exposed at the surface, and has compressive residual stress in one or both of the region Aand the region B

The present invention relates to a coated cutting tool () including a substrate () and a coating () formed on the substrate (), wherein the coating () includes a first coating () composed of TiCN and a second coating () composed of &#x3b1;-AlO, the first coating () is positioned between the substrate () and the second coating () and has tensile stress S, the second coating () has compressive stress S, and the tensile stress Sand the compressive stress Sare defined by the following equation (I):400 MPa&#x2266;|21|&#x2266;3500 MPa&#x2003;&#x2003;(I).

Coated cutting tool

A surface-coated cutting tool includes a coating layer () formed on a substrate (), wherein assuming that the average thickness of the coating layer () on a first surface () and a second surface () of the substrate () is A, a difference between the maximum and minimum thicknesses of the coating layer () is 0.04&#xd7;A or less. Also, a surface-coated cutting tool includes a coating layer () formed on a substrate (), wherein assuming that the average thickness of the coating layer () on a first surface () of the substrate () is B, and the average thickness of the coating layer () on a second surface () of the substrate () is B, a value obtained by dividing an absolute difference value between Band Bby a larger value of Band Bis 0.04 or less.

Growing community of inventors

Itami, Japan

Minoru Itoh