Proterial, Ltd.

Toyota Jidosha Kabushiki Kaisha

Umetoku Co., Ltd

Daido Chemical Co., Ltd.

Hitachi Metals, Ltd.

Shuho Koseki

Hiroshi Shiratori

Kazuya Shinagawa

Yasuhiko Otsubo

Kenichi Inoue

Satoshi Murakami

Shinya Okamoto

Yoshihiko Kobayashi

Kousuke Kuwabara

Hirotsugu Kawanaka

Tadashi Furuya

Tatsuya Shouji

Kiyomi Nakamura

Kenichiro Kunitomo

Yoshikazu Suzuki

Katsuhiro Obata

Daiki Shinno

Makoto Ogata

Toru Otomo

Nobuhiro Ikeda

Kousuke Uda

Takashi Ogisu

Toshifumi Miyamoto

Naoki Hayashi

Gang Han

Takahiro Makiyama

Hiroki Sugawara

Yuji Kawabata

Provided are a Ni—Cr—Mo-based alloy, a Ni—Cr—Mo-based alloy powder, a Ni—Cr—Mo-based alloy member, and a member that can be melted and solidified and have excellent corrosion resistance, wear resistance, and crack resistance. A Ni—Cr—Mo-based alloy member according to the present invention includes, by mass %, Cr: 18% to 22%, Mo: 18% to 39%, Ta: 1.5% to 2.5%, B: 1.0% to 2.5%, and a remainder consisting of Ni and unavoidable impurities, where 25≤Cr+(Mo/2B)<38 is satisfied, in which boride particles with a maximum particle size of 70 μm or less are dispersed and precipitated in a parent phase.

Ni—Cr—Mo-based alloy member, Ni—Cr—Mo-based alloy powder, and composite member

The present invention provides an alloy, an alloy powder, an alloy member, and a composite member which are excellent in corrosion resistance and wear resistance, have crack resistance, and are suitable for an additive manufacturing method and the like. An alloy and an alloy powder include, by mass %, Cr: 18 to 22%, Mo: 18 to 28%, Ta: 1.5 to 57%, C: 1.0 to 2.5%, Nb: 0 to 42%, Ti: 0 to 15%, V: 0 to 27%, Zr: 0 to 29%, and a remainder consisting of Ni and unavoidable impurities, where a molar ratio of (Ta+0.7Nb+Ti+0.6V+Zr)/C=0.5 to 1.5 is satisfied. An alloy member is an additively manufactured product or a cast having such a solidification structure, and the solidification structure is a dendrite-like crystal structure having a metal phase having a face-centered cubic structure and carbides.

Composite member

Provided are a WC-based cemented carbide powder from which a WC-based cemented carbide member excellent in high thermal conductivity and high abrasion resistance can be manufactured, a WC-based cemented carbide member, and a manufacturing method for a WC-based cemented carbide member. The WC-based cemented carbide powder of the present invention includes WC, Cu, and at least one of Co, Fe, and Cr. The content of WC is equal to or more than 40 mass %, the content of at least one of Co, Fe, and Cr is equal to or more than 25 mass % and less than 60 mass %, and the ratio a/b of the content 'a' of Cu and the content ‘b’ of at least one of Co, Fe, and Cr satisfies 0.070≤a/b≤1.000.

WC-based cemented carbide powder, WC-based cemented carbide member, and manufacturing method for WC-based cemented carbide member

A member includes a first metallic region made of a first material; a second metallic region made of a second material that is a different from the first material; and a mix region made of mixture of the first and second materials between the first and second metallic region. In a cross-sectional view, an interface between the first metallic region and the mix region is represented by a line having a first curved line protruding toward the first metallic region and a second curved line protruding toward the first metallic region, and an angle at a cross point of the first and second curved lines, the angle being made by a tangent line of the first curved line and a tangent line of the second curved line in a region of the first metallic region, is equal to or larger than 70 degrees and smaller than 180 degrees.

Member and method of manufacturing the same

A covering member has a hard film on the surface of a base material, wherein the hard film comprises a layer A selected from a nitride, a carbonitride, an oxynitride, and an oxycarbonitride of Cr or CrM; a metal layer which is formed on the outer surface side of the A layer and includes Cr, Ti, or W; and a layer B which is formed on the outer surface side of the metal layer and selected from a nitride, a carbonitride, an oxynitride, and an oxycarbonitride of Cr or CrM, and wherein M is one or two or more from a Group 4 metal, a Group 5 metal, a Group 6 metal of the periodic table, Al, Si, and B, and strain is introduced in the outer surface side of the metal layer.

Covering member and method for manufacturing the same

A method for manufacturing a forged article, capable of improving the durability of a die for forging is provided. The method, includes forging a steel material, by using a die, by spraying or applying a water-soluble polymer lubricant containing 0.01 to 0.98 mass % of a water-soluble sulfate onto a working surface of the die, the die being made of a raw material having a constituent composition of by mass %, of 0.4 to 0.7% of C, 1.0% or less of Si, 1.0% or less of Mn, 4.0 to 6.0% of Cr, 2.0 to 4.0% of (Mo+½W), 0.5 to 2.5% of (V+Nb), 0 to 1.0% of Ni, 0 to 5.0% of Co, 0.02% or less of N, and a remnant composed of Fe and impurities, and having hardness of 55 to 60 HRC, and the die including a nitrided layer or a nitrosulfidized layer on the working surface thereof.

Method for manufacturing forged article

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Tokyo, Japan

Shuho Koseki