Osaka Prefecture University Public Corporation

Isel Co., Ltd.

Honda Motor Co., Ltd.

Asahi Seiko Company Ltd.

Kinki University

University Public Corporation Osaka

Osaka Fuji Corporation

Yasuyuki Kaneno

Takayuki Takasugi

Noboru Mochizuki

Tomotake Hirata

Sachio Oki

Yusuke Kikuchi

Masahiro Hayashi

Kiichi Kakei

Kazuki Nagao

Takanori Uchida

Keiji Munekane

Yuki Kitamura

Hidekazu Fujii

Yoshihiro Tatsumi

A ball bearing has an outer circumferential surface of an inner ring subjected to a surface treatment by laser cladding in a circumferential direction, forming an annular first build-up layer with which a plurality of ballsis brought into contact so that the balls are rolled in the circumferential direction (first build-up layer formation step). An inner circumferential surface of an outer ring is subjected to a surface treatment by laser cladding in a circumferential direction, thereby forming an annular second build-up layer with which the plurality of balls contacts so that the balls can be rolled in the circumferential direction (second build-up layer formation step).

Ball bearing and method for manufacturing same

There is provided a Ni-based intermetallic alloy having a dual multi-phase microstructure containing a primary precipitate L1phase and an (L1+D0) eutectoid microstructure. Thus, the Ni-based intermetallic alloy contains Ni, Al, and V as basic elements, and the contents of Ni, Al, and V are controlled to form the dual multi-phase microstructure. The Ni-based intermetallic alloy further contains at least one of Zr and Hf in addition to the basic elements.

Nickel-based intermetallic alloy and method for producing the same

A catalyst according to the present invention exhibits a catalytic action to a methanol decomposition reaction or a hydrocarbon steam-reforming reaction in a short time. The present invention provides a catalyst for producing hydrogen gas, using an NiSi-based intermetallic compound.

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The present invention provides a structural material having excellent hardness (strength) characteristics. The present invention provides an Ni(Si, Ti)-based intermetallic compound characterized by containing from 25 to 500 ppm by weight of B with respect to a weight of an intermetallic compound having a composition of 100% by atom in total consisting of from 10.0 to 12.0% by atom of Si, 1.5% by atom or more but less than 7.5% by atom of Ti, more than 2.0% by atom but 8.0% by atom or less of Ta and a balance made up of Ni excepting impurities, and by having a microstructure composed of an L1phase or a microstructure composed of an L1phase and a second phase dispersion containing Ni and Ta.

The present invention provides a structural material having enhanced ductility characteristics at high temperatures and enhanced strength characteristics. The present invention provides an Ni(Si, Ti)-based intermetallic compound characterized by containing from 25 to 500 ppm by weight of B with respect to a weight of an intermetallic compound having a composition of 100% by atom in total consisting of Ni as a main component, from 7.5 to 12.5% by atom of Si, from 4.5 to 11.5% by atom of Ti and from 0.5 to 5.0% by atom of W.

The present invention provides a heat-resistant bearing characterized in that it is formed of an Ni(Si,Ti)-based intermetallic compound alloy, the Ni(Si,Ti)-based intermetallic compound alloy containing 25 to 500 ppm by weight of B with respect to a weight of an intermetallic compound having a composition of 100% by atom in total consisting of 10.0 to 12.0% by atom of Si, 1.5% by atom or more but less than 7.5% by atom of Ti, more than 2.0% by atom but 8.0% by atom or less of Ta and a balance made up of Ni excepting impurities, the Ni(Si,Ti)-based intermetallic compound alloy having a microstructure composed of an L1phase and of one or both of an Ni solid solution phase and a second phase dispersion containing Ni and Ta, or a microstructure composed of an L1phase.

The present invention provides an Ni-base dual multi-phase intermetallic compound alloy which has a dual multi-phase microstructure comprising a primary precipitate L1phase and an (L1+D0) eutectoid microstructure, and which comprises: more than 5 atomic % and up to 13 atomic % of Al; at least 9.5 atomic % and less than 17.5 atomic % of V; more than 0 atomic % and up to 12.5 atomic % of Nb; more than 0 atomic % and up to 12.5 atomic % of C; and a remainder comprising Ni.

Ni-base dual multi-phase intermetallic compound alloy containing Nb and C, and manufacturing method for same

The present invention provides an Ni-base dual multi-phase intermetallic compound alloy which has a dual multi-phase microstructure including: a primary precipitate L1phase and an (L1+D0) eutectoid microstructure, and which comprises more than 5 atomic % and up to 13 atomic % of Al; at least 9.5 atomic % and less than 17.5 atomic % of V; between 0 atomic % and 5.0 atomic % inclusive of Nb; more than 0 atomic % and up to 12.5 atomic % of Ti; more than 0 atomic % and up to 12.5 atomic % of C; and a remainder comprising Ni.

Ni-base dual multi-phase intermetallic compound alloy containing Ti and C, and manufacturing method for same

The present invention provides an Ni-based intermetallic compound alloy having excellent hardness. The present invention provides an Ni-based dual multi-phase intermetallic compound alloy comprising Ni as a main component, and 5 to 12 atomic % of Al, 11 to 17 atomic % of V and 1 to 5 atomic % of Re, and having a dual multi-phase microstructure including a primary precipitate L1phase and a (L1+D0) eutectoid microstructure.

Re-added Ni-based dual multi-phase intermetallic compound alloy and method for producing the same

A friction stir processing apparatus comprises a tool, a processing head retaining the tool, a support table retaining the workpiece, and a cylinder unit biasing the support table toward the tool. The tool having a probe projecting from a shoulder surface, for performing friction stir processing on a workpiece made of a metal material. The processing head is pressing the tool against the workpiece so as to relatively shift the tool in a processing direction. The friction stir processing apparatus comprises load control means for controlling to constantly keep the bias force of the cylinder unit so as to constantly keep pressurizing force of the tool pressing the workpiece. It is thus possible to perform friction stir processing with excellent quality even when the workpiece has a different thickness or is made of a different material.

Friction stir processing apparatus and friction stir processing method

A friction stir processing tool is formed from a Ni-based dual multi-phase intermetallic compound alloy containing rhenium(Re). The Ni-based dual multi-phase intermetallic compound alloy is preferably formed by casting, while gradually cooling, a melt containing all the components of the composition and is preferably heat treated after casting. Moreover, in a method for friction stir processing, a work is softened by friction heat generated when the friction stir processing tool, while rotating, is pressed against the work to be processed. The friction stir processing tool includes the Ni-based dual multi-phase intermetallic compound alloy, and therefore further high hardness is exhibited to improve abrasion resistance, so that even a long period of friction stir processing can be endured.

Tool and method for friction stir processing using the friction stir processing tool

An intermetallic compound having excellent mechanical properties at high temperatures is provided. An intermetallic compound of the present invention contains greater than 5 at % and not greater than 13 at % of Al, not less than 9.5 at % and less than 17.5 at % of V, not less than 0 at % and not greater than 3.5 at % of Ti, not less than 0 weight ppm and not greater than 1000 weight ppm of B, and the remaining portion consisting of Ni and inevitable impurities, and having a dual multi-phase microstructure comprising a primary L1phase and an (L1+D0) eutectoid microstructure.

An NiAl-based intermetallic compound of the present invention comprises greater than 5 at % and not greater than 13 at % of Al, not less than 9.5 at % and less than 17.5 at % of V, not less than 0 at % and not greater than 5 at % of Nb, not less than 50 weight ppm and not greater than 1000 weight ppm of B, and the remaining portion consisting of Ni and inevitable impurities, and has a dual multi-phase microstructure comprising a primary L1phase and an (L1+D0) eutectoid microstructure.

Growing community of inventors

Sakai, Japan

Yasuyuki Kaneno