Sumitomo Electric Hardmetal Corp.

Sumitomo Electric Industries, Limited

Susumu Okuno

Shinya Imamura

Anongsack Paseuth

Yasuki Kido

Minoru Itoh

Fumiyoshi Kobayashi

Yoshio Okada

Naoya Omori

Masahito Hikiji

Hideaki Kanaoka

Takato Yamanishi

Hiroyuki Morimoto

Norihiro Takanashi

Takahiro Ichikawa

Satoshi Ono

Yuki Rikiso

Keiichi Tsuda

Kazuo Yamagata

Chikako Kojima

Erika Iwai

A cutting tool includes: a substrate; and a coating film disposed on the substrate, wherein the coating film includes an α-AlOlayer, the α-AlOlayer includes a plurality of α-AlOcrystal grains, and has a TC(006) of more than 5 in texture coefficient TC(hkl), and an elastic modulus E1 of the α-AlOlayer at a room temperature and an elastic modulus E2 of the α-AlOlayer at 800° C. represent a relation of the following expression B-1:0<{(1−2)/1}×100<10  Expression B-1.

Cutting tool

A cutting tool includes a substrate and a coating provided on the substrate, the coating including: a first alumina layer provided on the substrate, a titanium compound layer provided directly on the first alumina layer, and a second alumina layer provided directly on the titanium compound layer; in which a portion adjacent to the titanium compound layer in the first alumina layer serves as an interface region, a portion that is not the interface region in the first alumina layer serves as a non-interface region, a content of nitrogen in the interface region is 0.2 at % or more and 10.5 at % or less, and a content of nitrogen in the non-interface region is 0 at % or more and 0.15 at % or less; and the titanium compound layer comprises a layer of titanium carbonitride adjacent to the first alumina layer.

A cutting tool includes: a substrate; and a coating film disposed on the substrate, wherein the coating film includes an α-AlOlayer, the α-AlOlayer includes a plurality of α-AlOcrystal grains, and has a TC(006) of more than 5 in texture coefficient TC(hkl), and a plastic deformation amount hp of the α-AlOlayer at 800° C. is 0 nm or more and 100 nm or less.

A cutting tool includes: a substrate; and a coating film disposed on the substrate, wherein the coating film includes an α-AlOlayer, the α-AlOlayer includes a plurality of α-AlOcrystal grains, and has a TC(006) of more than 5 in texture coefficient TC(hkl), and a hardness H1 of the α-AlOlayer at a room temperature and a hardness H2 of the α-AlOlayer at 800° C. represent a relation of the following expression A-1:0<{(H1−H2)/H1}×100<60   Expression A-1.

Provided is a cutting tool including a base material and a coating layer provided on the base material, the coating layer including a titanium carbonitride layer provided on the base material, an intermediate layer provided on the titanium carbonitride layer in contact therewith, and an alumina layer provided on the intermediate layer in contact therewith, the intermediate layer being composed of a compound made of titanium, carbon, oxygen, and nitrogen, the intermediate layer having a thickness of more than 1 μm, when Patomic % represents an atomic ratio of the oxygen in an interface between the intermediate layer and the alumina layer, and Patomic % represents an atomic ratio of the oxygen at a point A away from the interface by 1 μm on a side of the intermediate layer, a ratio P/Pof the Pto the Pbeing more than or equal to 1.03.

A cutting tool comprises a substrate and a coating provided on the substrate, the coating including: a first alumina layer, a titanium compound layer, and a second alumina layer; in which a portion adjacent to the titanium compound layer in the first alumina layer serves as an interface region, a portion that is not the interface region in the first alumina layer serves as a non-interface region, a content of nitrogen in the interface region is 0.2 at % to 12 at %, and a content of nitrogen in the non-interface region is 0 at % to 0.15 at %; and the titanium compound layer includes a multilayer structure layer adjacent to the first alumina layer, the multilayer structure layer is composed of a first unit layer and a second unit layer, the first unit layer is made of titanium carbonitride, and the second unit layer is made of titanium carbonitroxide.

A cutting tool comprises a substrate and a coating provided on the substrate, the coating including a first alumina layer provided on the substrate, a titanium compound layer provided directly on the first alumina layer, and a second alumina layer provided directly on the titanium compound layer, in which a portion adjacent to the titanium compound layer in the first alumina layer serves as an interface region, a portion that is not the interface region in the first alumina layer serves as a non-interface region, a content of nitrogen in the interface region is 0.2 at % or more and 11 at % or less, and a content of nitrogen in the non-interface region is 0 at % or more and 0.15 at % or less; and the titanium compound layer comprises a layer of titanium carbonitroxide adjacent to the first alumina layer.

A cutting tool comprises a substrate and a coating that coats the substrate, the coating including an α-alumina layer provided on the substrate, the α-alumina layer including crystal grains of α-alumina, the α-alumina layer including a lower portion and an upper portion, the upper portion being occupied in area at a ratio of 50% or more by crystal grains of α-alumina having a (006) plane with a normal thereto having a direction within ±15° with respect to a direction of the normal to the second interface, the lower portion being occupied in area at a ratio of 50% or more by crystal grains of α-alumina having a (006) plane with a normal thereto having a direction within ±15° with respect to the direction of the normal to the second interface, the α-alumina layer having a thickness of 3 μm or more and 20 μm or less.

Provided is a cutting tool including a base material and a coating layer provided on the base material, the coating layer including a titanium carbonitride layer provided on the base material, an intermediate layer provided on the titanium carbonitride layer in contact therewith, and an alumina layer provided on the intermediate layer in contact therewith, the intermediate layer being composed of a compound made of titanium, carbon, oxygen, and nitrogen, the intermediate layer having a thickness of more than 1 μm, when Patomic % represents an atomic ratio of the carbon in an interface between the intermediate layer and the alumina layer, and Patomic % represents an atomic ratio of the carbon at a point A away from the interface by 1 μm on a side of the intermediate layer, a ratio P/Pof the Pto the Pbeing more than or equal to 1.03.

A cutting tool including a rake face and a flank face includes: a substrate; and a coating film disposed on the substrate, wherein the coating film includes an AlOlayer, residual stress of the AlOlayer has a minimum value Rat at least a portion of a region dof the rake face, the minimum value Ris more than −0.27 GPa and less than or equal to −0.1 GPa.

A cutting tool comprises a substrate and a coating that coats the substrate, the coating including an α-alumina layer provided on the substrate, the α-alumina layer including crystal grains of α-alumina, the α-alumina layer including a lower portion and an upper portion, the upper portion being occupied in area at a ratio of 50% or more by crystal grains of α-alumina having a (006) plane with a normal thereto having a direction within ±15° with respect to a direction of the normal to the second interface, the lower portion being occupied in area at a ratio of 50% or more by crystal grains of α-alumina having a (110) plane with a normal thereto having a direction within ±15° with respect to the direction of the normal to the second interface, the α-alumina layer having a thickness of 3 μm or more and 20 μm or less.

A cutting tool including a rake face, a flank face, and a cutting edge portion, comprising a substrate and an AlTiN layer, the AlTiN layer including cubic AlTiN crystal grains, Al having an atomic ratio x of 0.7 or more and 0.95 or less, the AlTiN layer including a central portion, the central portion at the rake face being occupied in area by (200) oriented crystal grains at a ratio of 80% or more, the central portion at the flank face being occupied in area by (200) oriented crystal grains at a ratio of 80% or more, the central portion at the cutting edge portion being occupied in area by (200) oriented crystal grains at a ratio of 80% or more.

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 cutting tool comprising a base material and a coating arranged on the base material; wherein: the coating comprises an &#x3b1;-AlOlayer composed of a plurality of &#x3b1;-AlOparticles; the average particle diameter a of the &#x3b1;-AlOparticles in a first region of the &#x3b1;-AlOlayer is 0.10 &#x3bc;m or more and 0.30 &#x3bc;m or less; the average particle diameter b of the &#x3b1;-AlOparticles in a second region of the &#x3b1;-AlOlayer is 0.30 &#x3bc;m or more and 0.50 &#x3bc;m or less; the average particle diameter c of the &#x3b1;-AlOparticles in a third region of the &#x3b1;-AlOlayer is 0.30 &#x3bc;m or more and 0.50 &#x3bc;m or less; and the ratio b/a is 1.5 or more and 5.0 or less.

Cutting tools

A cutting tool comprising a base material and a coating arranged on the base material; wherein: the coating comprises an &#x3b1;-AlOlayer composed of a plurality of &#x3b1;-AlOparticles; the average particle diameter a of the &#x3b1;-AlOparticles in a first region of the &#x3b1;-AlOlayer is 0.10 &#x3bc;m or more and 0.30 &#x3bc;m or less; the average particle diameter b of the &#x3b1;-AlOparticles in a second region of the &#x3b1;-AlOlayer is 0.30 &#x3bc;m or more and 0.50 &#x3bc;m or less; the average particle diameter c of the &#x3b1;-AlOparticles in a third region of the &#x3b1;-AlOlayer is 0.10 &#x3bc;m or more and 0.30 &#x3bc;m or less; and the ratio b/a is 1.5 or more and 5.0 or less.

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Itami, Japan

Susumu Okuno