Sumitomo Electric Hardmetal Corp.

Daihen Corporation

Hiroyuki Morimoto

Anongsack Paseuth

Hideaki Kanaoka

Susumu Okuno

Minoru Itoh

Yoshio Okada

Chikako Kojima

Erika Iwai

Shinya Imamura

Keiichi Tsuda

Naoya Omori

Kazuo Yamagata

Takahiro Ichikawa

Toshihiko Okada

Moritoshi Nagasaka

Mitsuo Kohno

Masao Sakai

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 excellent in wear resistance is provided. The surface-coated cutting tool of the present invention includes a base material and a coating formed on the base material. The coating includes an inner layer and an outer layer. The inner layer is a single layer or a multilayer stack constituted of two or more layers made of 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, or a compound of at least one element selected from this group and at least one element selected from the group consisting of carbon, nitrogen, oxygen, and boron. The outer layer includes &#x3b1;-aluminum oxide as a main component and exhibits an equivalent peak intensity PR(024) of a (024) plane of x-ray diffraction of larger than 1.3.

Surface-coated cutting tool

The surface-coated cutting tool of the present invention is characterized in that a region of 10 &#x3bc;m in a surface of the base material from point a' to point b&#x2032; has two to seven cracks with a width of not more than 200 nm, or two to ten pores are present per length of 10 &#x3bc;m in the surface of the base material from point a&#x2032; to point b&#x2032;, where points a&#x2032; and b&#x2032; are points defined respectively by lines drawn perpendicularly from points a and b to the surface of the base material where point a is a position located away from an edge ridgeline toward a rake face by distance La and point b is a position located away from the edge ridgeline toward a flank face by distance Lb.

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 at least one TiCN layer. The TiCN layer has a columnar crystal region. The columnar crystal region is characterized by having a composition of TiCN(in which 0.65&#x2266;x/(x+y)&#x2266;0.90), having a (422) plane having a plane spacing of 0.8765 &#x212b; to 0.8790 &#x212b; and having TC (220) showing a maximum value in an orientation index TC (hkl).

Surface-coated cutting tool and manufacturing method thereof

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.

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.

There is disclosed an arc spot welding apparatus comprising a welding power supplying unit, a wire feeder connected to the welding power supplying unit by a control cable and an arc spot welding torch connected to the wire feeder by a torch cable which is operable by operating an operation switch arranged on a holder thereof to be held by an operator being characterized in that the welding torch is comprised of a nozzle assembly providing a nozzle and a power supply element, a torch holder assembly and a torch body assembly connecting said nozzle assembly and said torch holder assembly which is formed to have a length so that the operator can operate said welding torch in a standing posture.

Growing community of inventors

Itami, Japan

Hiroyuki Morimoto