Sumitomo Electric Industries, Limited

Sumitomo Electric Hardmetal Corp.

Osaka University

Osaka Municipal Technical Research Institute

Other

National Institute of Advanced Industrial Science and Technology

Nissin Electric Co., Ltd.

A.l.m.t. Corporation

Hideki Moriguchi

Akihiko Ikegaya

Yoshiharu Utsumi

Haruyo Fukui

Makoto Setoyama

Toshio Nomura

Shinya Imamura

Naoya Omori

Nobuyuki Kitagawa

Hidetoshi Fujii

Mitsunori Kobayashi

Yoshiaki Morisada

Daisuke Murakami

Katsuya Uchino

Tomoyuki Ishida

Hiroka Miyazaki

Satoru Kukino

Koji Yamaguchi

Keiichi Tsuda

Kiyoshi Ogata

Yoshio Okada

Hisanori Ohara

Kimihiro Ozaki

Kazuo Yamagata

Sachiko Koike

Naoto Okazaki

Miki Irie

Keizo Kobayashi

Hiroka Aoyama

Satoshi Ohtani

Yoshifumi Arisawa

Katsumi Okamura

Nobuyuki Mori

Tomohiro Fukaya

Junji Iihara

Michio Otsuka

Junya Okida

Minoru Itoh

Kazuhiro Hirose

Miki Miyanaga

Yoshiharu Yamamoto

Yusuke Matsuda

Takeru Nakashima

Yoshinari Miyamoto

Shinichiro Yurugi

Kazuo Sasaya

Daiji Tabayashi

Akihiko Shibata

Takuya Okuno

Teruhiro Enami

Akira Sakamoto

Tosiaki Nakamata

Koji Sano

Akio Fujimura

Mitsuo Nishimura

Takashi Hirao

A joined product has a cemented carbide sintered compact serving as a first material to be joined and a cBN sintered compact serving as a second material to be joined, wherein: the first material to be joined and the second material to be joined are joined together via a joining material disposed therebetween and containing titanium (Ti); and a titanium nitride (TiN) compound layer having a thickness of 10-300 nm is produced at an interface between the second material to be joined and the joining material.

Joined product

A friction stir welding tool () of the present invention is used for friction stir welding, and includes: a base material (); and a coating layer () formed on a surface of at least a portion of the base material () that is to be caused to contact workpieces during friction stir welding, the coating layer () containing cubic WC.

Coated rotary tool and method for manufacturing the same

There is provided a tool for friction stir welding, in which a coating layer is less likely to peel off from a base material and excellent wear resistance is achieved. The tool for friction stir welding according to the present invention includes a base material (BM) and a coating layer. The BM includes a first hard phase (FP) formed by WC particles, a second hard phase (SP) and a binder phase (BP). The SP is formed by a compound of one or more metals selected from Ti, Zr, Hf, Nb, Ta, Cr, Mo, and W and one or more elements selected from nitrogen, carbon, boron, and oxygen, and is included in the BM at a volume ratio of 3% to 30%. The BP is included in the BM at a volume ratio of 8% to 28%. The FP is higher than the SP in terms of volume ratio.

Rotary tool

The present invention provides a composite material that is excellent in the bonding ability between a cemented carbide layer and a cermet layer is excellent and deformation after sintering can be suppressed and a coated cutting tool having a base containing the composite material. A composite materialis obtained by laminating a cemented carbide layerand a cermet layerand has the cemented carbide layeron the surface side. The boundary between both the layersandhas a concave portion, and the maximum depth Dof the concave portionis 50 &#x3bc;m or more and 500 &#x3bc;m or lower. When the thickness of the composite material is defined as hand the thickness of the cemented carbide layeris defined as h, h/his in the range of more than 0.02 and 0.4 or lower. By providing the concave portionto the boundary, both the layersandare sufficiently bound and the bonding ability therebetween is excellent. Due to the fact the cemented carbide layersatisfies the given thickness mentioned above, the composite materialis difficult to deform.

Composite material and coated cutting tool

There is provided a tool for friction stir welding, which is capable of promoting temperature rise of materials to be joined during joining to achieve friction stir welding in a short time, is excellent in heat insulating property of a coating layer, and is excellent in oxidation resistance and wear resistance. A tool for friction stir welding according to the present invention is a tool for friction stir welding including a base material and a coating layer formed on the base material, wherein the coating layer is formed of one or more layers, and at least one layer of the coating layer has a thermal permeability of 5000 J/s&#xb7;m&#xb7;K or less.

Coated rotary tool

There is provided a tool for friction stir welding having excellent wear resistance and chipping resistance. The tool for friction stir welding according to the present invention includes a base material, the base material includes a first hard phase, a second hard phase and a binder phase, the first hard phase is formed by WC particles, the second hard phase is formed by a compound of one or more metals selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W and one or more elements selected from the group consisting of nitrogen, carbon, boron, and oxygen, or a solid solution of the compound (except for WC), the binder phase is formed by an iron group metal, and the second hard phase is higher than or identical to the first hard phase in terms of volume ratio.

There is provided a joined product suitable as a cutting tool that is fit for high-speed cutting, CVD coating process and the like, and does not cause a reduction in joint strength of a joining layer even if a high temperature exceeding a temperature at which a brazing filler forms the liquid phase is reached during cutting. Specifically, the joined product includes a cemented carbide sintered compact serving as a first material to be joined and a cBN sintered compact or a diamond sintered compact serving as a second material to be joined. The first material to be joined and the second material to be joined are joined by a joining material that does not form a liquid phase at a temperature lower than 1000&#xb0; C. and that is placed between the first material to be joined and the second material to be joined. The joining is performed by resistance heating and pressing at a pressure of 0.1 to 200 MPa.

There is provided a tool for friction stir welding having excellent wear resistance and chipping resistance. The tool for friction stir welding according to the present invention is a tool for friction stir welding used in friction stir welding processing, wherein the tool for friction stir welding includes a base material, the base material includes a first hard phase and a binder phase, and has a thermal conductivity of 45 W/m&#xb7;K or less, the first hard phase is formed by WC particles, and the binder phase is formed by an iron group metal and is included in the base material at a volume ratio of 8% by volume or more and 28% by volume or less.

There are provided a cemented carbide high in thermal diffusivity and excellent in wear resistance, and a cutting tool including a base material formed of this cemented carbide. The cemented carbide is a WC based cemented carbide in which a hard phase mainly constituted of WC grains is bound by a binder phase mainly constituted of Co, and is used for a cutting tool. The binder phase is substantially constituted of Co, or Co and Ni. A total content of Co and Ni is not less than 4.5 mass % and not more than 15 mass %. In this cemented carbide, the WC grains have an average diameter of not less than 0.4 &#x3bc;m and not more than 4 &#x3bc;m.

Cemented carbide and cutting tool using same

A surface-coated cutting tool of the present invention includes a substrate and a coated layer formed on the substrate, and the coated layer is a physical-vapor-deposition layer having a thickness of 10 &#x3bc;m or more. A surface region having a thickness of 1 &#x3bc;m from a surface of the coated layer includes a first region whose integrated residual stress is a compressive stress and a second region whose integrated residual stress is a tensile stress, and the integrated residual stress of the surface region falls within the range of &#x2212;1.5 to 1.5 GPa in any region included in the surface region.

Surface coated cutting tool

A surface-coated cutting tool according to the present invention includes a base material and a coating film formed on the base material. The coating film includes one or more hard layer and one or more oxygen-rich hard layer. The hard layer is crystalline in its entirety or crystalline with a part thereof being amorphous. The oxygen-rich hard layer and the hard layer are stacked and the oxygen-rich hard layer is amorphous in a region of interface with the hard layer.

Surface-coated cutting tool

A coated cutting tool and its manufacturing method are provided. The coated cutting tool includes a base material and a coating layer formed on a surface of the base material. The coating layer includes an alternate layer having at least one layer of each of an A layer and a B layer stacked one on another alternately. The A layer is made of a nitride containing Al and Cr, and when the total number of metal atoms constituting the A layer is represented as 1, a ratio of the number of Cr atoms is more than 0 and not more than 0.4. The B layer is made of a nitride containing Ti and Al, and when the total number of metal atoms constituting the B layer is represented as 1, a ratio of the number of Al atoms is more than 0 and not more than 0.7.

Coated cutting tool and manufacturing method thereof

A surface-coated cutting tool according to the present invention includes a base material and a coated film formed on the base material. The coated film serves as an outermost layer on the base material and has compressive stress. The compressive stress is varied so as to have strength distribution in a direction of thickness of the coated film. The strength distribution is characterized in that the compressive stress at a surface of the coated film continuously decreases from the surface of the coated film toward a first intermediate point located between the surface of the coated film and a bottom surface of the coated film and the compressive stress attains a relative minimum point at the first intermediate point.

Surface-coated cutting tool with coated film having strength distribution of compressive stress

A surface-coated cutting tool according to the present invention includes a base material and a coated film formed on the base material. The coated film serves as an outermost layer on the base material and has compressive stress. The compressive stress is varied so as to have strength distribution in a direction of thickness of the coated film. The strength distribution is characterized in that the compressive stress at a surface of the coated film continuously increases from the surface of the coated film toward a first intermediate point located between the surface of the coated film and a bottom surface of the coated film and the compressive stress attains a relative maximum point at the first intermediate point.

Growing community of inventors

Itami, Japan

Hideki Moriguchi