Asahi Kogaku Kogyo Kabushiki Kaisha

Nippon Steel Corporation

Oji Holdings Corporation

Pentax Corporation

Toyota Jidosha Kabushiki Kaisha

Hoya Corporation

Sumitomo Metal Industries, Inc.

Nippon Steel Sumitomo Metal Corporation

Toyoda Iron Works Co., Ltd.

Nisshin Steel Co., Ltd.

Asahi Kogaku Kabushiki Kaisha

Masahiro Nakata

Yuji Yamaguchi

Tadakazu Ishiwata

Shigeru Iwamoto

Kohichi Sano

Toshiya Suzuki

Shinichi Suzuki

Satoshi Uchida

Isamu Hirai

Takafumi Yokoyama

Kohei Hisada

Hideaki Tsuji

Hiroyuki Takahashi

Yoshiaki Nakazawa

Natsuko Sugiura

Tetsuo Hosokawa

Tadayuki Kirigaya

Makoto Uno

Satoru Horita

Kunio Hayashi

Osamu Sato

Osamu Satoh

Hiroki Fujimoto

Atsushi Kawakita

Yoshinori Matsuo

Hiroyuki Kawata

Riki Okamoto

Makoto Iikawa

Katsuya Nakano

Eisaku Sakurada

Kohei Ueda

Takashi Yasutomi

Yasuhiro Ito

Kenji Yamamoto

Jun Maki

Yuki Suzuki

Masahiro Fuda

Hiroshi Takebayashi

Soshi Fujita

Shuhei Ogura

Takeshi Kawachi

Masanori Yasuyama

Nobusato Kojima

Tadahisa Ohkura

Toru Hioki

Takefumi Nakako

Toshiharu Kittaka

Toyomitsu Nakamura

Hideaki Irikawa

Tamotsu Toki

Akihiro Kakehi

Yoshimune Okuyama

Tatsuji Ishida

Ryoichi Nishiyama

Kazuyuki Ogusu

Masanobu Ichikawa

Yuji Sakiyama

Kazuki Shiokawa

Yoshikazu Fujishiro

Junichiro Makino

Yuichi Nakahira

Yoshiaki Honda

Masahiro Yoda

Yutaka Mikazuki

Kazuo Ikeda

Masahito Tasaka

Kenji Ooshima

Ryo Tabata

Eiji Isogai

Hitomi Nishibata

Osamu Satou

Akira Obayashi

Toshiaki Taniike

Shuntaro Sudo

Takeshi Tominaga

Yuichi Shishido

Takeyuki Yoshida

Toshinobu Nishibata

Michiko Sueyoshi

Tatsurou Iwasaki

Hiromichi Shiroma

Tetsuo Itou

Hiroyuki Tanase

Katsuyuki Moritaka

Kazuyuki Hiate

Minoru Terano

Ikki Katada

Shigeo Murase

Junichi Okura

Tomokichi Tokuda

Takuma Kawanaka

Nobuyuki Ichimaru

Tetsuo Kobe Construction Office Itou

Kenji Fuji Construction Office Ooshima

Takeyuki Steel & Techn Dev Lab Yoshida

Takefumi Steel & Techn Dev Lab Nakako

Hiromichi Kochi Construction Office Shiroma

Toshiharu Nisshin-Kokan Co Ltd Kittaka

A structural part includes a part body and a cylindrical bush. The part body includes a through-hole and a cylindrical flange part provided in the periphery of the through-hole. The bush is inserted into the through-hole and the flange part. When seen in a cross section including a central axis of the bush, the flange part has a height difference between a first part that contacts the bush on one side in a direction perpendicular to the central axis and a second part that contacts the bush on the other side.

Structural part

Provided is a steel sheet comprising a sheet thickness center part and a first surface layer part and a second surface layer part respectively arranged at two sides of the sheet thickness center part, wherein the first surface layer part and second surface layer part respectively independently have thicknesses of more than 10 μm to 30% or less of the sheet thickness, the first surface layer part and second surface layer part have average Vickers hardnesses different from the average Vickers hardness of a sheet thickness ½ position, and a first hardness cumulative value at a region from a surface of the first surface layer part side to 30% of the sheet thickness is 1.05 times or more of a second hardness cumulative value at a region from a surface of the second surface layer part side to 30% of the sheet thickness.

Steel sheet

A steel sheet includes a sheet thickness center part and a first surface layer softened part and a second surface layer softened part respectively arranged at two sides of the sheet thickness center part, wherein the first surface layer softened part and second surface layer softened part have 10 μm or more average thicknesses and have average Vickers hardnesses of 0.90 times or less of the average Vickers hardness of a sheet thickness ½ position, and the first surface layer softened part has an average Vickers hardness of 1.05 times or more the average Vickers hardness of the second surface layer softened part.

A polypropylene film which is capable of suppressing blocking in a rolled polypropylene film. The polypropylene film has a first surface and a second surface, contains a polypropylene resin as a main component, and is configured such that: the Svk value (SvkA) of the first surface is 0.005 μm or more and 0.030 μm or less; the Spk value (SpkA) of the first surface is more than 0.035 μm and 0.080 μm or less; the Svk value (SvkB) of the second surface is 0.005 μm or more and 0.030 μm or less; and the Spk value (SpkB) of the second surface is 0.015 μm or more and 0.035 μm or less.

Polypropylene film, metal layer-integrated polypropylene film, film capacitor and film roll

A zinc-plated steel sheet includes a steel sheet having a predetermined chemical composition and a zinc-plated layer. In the steel sheet, steel microstructures in a range of ⅛ thickness to ⅜ thickness, having the center at ¼ thickness from a steel sheet surface, include, by vol %, ferrite: 0% to 10%, bainite: 0% to 30%, tempered martensite: 50% or more, fresh martensite: 0% to 10%, retained austenite: more than 10% and 30% or less, and pearlite: 0% to 5%. In the zinc-plated steel sheet, the amount of hydrogen emitted when the steel sheet is heated to 200° C. from room temperature after removal of the zinc-plated layer is 0.40 ppm or less per mass of the steel sheet, the tensile strength is 1470 MPa or more, and no cracking occurs in a U-shape bending test where a stress equivalent to 1000 MPa is applied for 24 hours.

Zinc-plated steel sheet and manufacturing method thereof

In a metallized film, n electrode portions, which are metal deposition portions, are formed in parallel on one surface of a dielectric filmhaving a film width corresponding to n capacitor elements, n being an even number of 2 or more. Each electrode portionis provided with a plurality of inclined marginsand, which are metal non-deposition portions extending at an angle with respect to a film width direction, at a regular interval in a film length direction. Across a center line Lc virtually extending in the film length direction at the center in the film width direction, the inclined marginsof the electrode portionlocated on one side in the film width direction, and the inclined marginsof the electrode portionlocated on the other side in the film width direction are inclined in opposite directions so as to be line-symmetric with respect to the center line Lc.

Metallized film, metallized film roll, plate roll

A zinc-plated steel sheet of an aspect of the present invention includes a steel sheet having a predetermined chemical composition and a zinc-plated layer. In the steel sheet, steel microstructures in a range of &#x215b; thickness to &#x215c; thickness, having the center at &#xbc; thickness from a steel sheet surface, include, by vol %, ferrite: 0% to 10%, bainite: 0% to 20%, tempered martensite: 70% or more, fresh martensite: 0% to 10%, retained austenite: 0% to 10%, and pearlite: 0% to 5%. In the zinc-plated steel sheet, the amount of hydrogen emitted when the steel sheet is heated to 200&#xb0; C. from a room temperature after removal of the zinc-plated layer is 0.40 ppm or less per mass of the steel sheet, the tensile strength is 1470 MPa or more, and no cracking occurs in a U-shape bending test where a stress equivalent to 1000 MPa is applied for 24 hours.

A polypropylene film which is capable of suppressing blocking in a rolled polypropylene film. The polypropylene film has a first surface and a second surface, contains a polypropylene resin as a main component, and is configured such that: the Svk value (SvkA) of the first surface is 0.005 &#x3bc;m or more and 0.030 &#x3bc;m or less; the Spk value (SpkA) of the first surface is more than 0.035 &#x3bc;m and 0.080 &#x3bc;m or less; the Svk value (SvkB) of the second surface is 0.005 &#x3bc;m or more and 0.030 &#x3bc;m or less; and the Spk value (SpkB) of the second surface is 0.015 &#x3bc;m or more and 0.035 &#x3bc;m or less.

A steel sheet has a specific chemical composition and has a structure represented by, by area ratio, ferrite: 5 to 60%, and bainite: 40 to 95%. When a region that is surrounded by a grain boundary having a misorientation of 15&#xb0; or more and has a circle-equivalent diameter of 0.3 &#x3bc;m or more is defined as a crystal grain, the proportion of crystal grains each having an intragranular misorientation of 5 to 14&#xb0; to all crystal grains is 20 to 100% by area ratio. A precipitate density of Ti(C,N) and Nb(C,N) each having a circle-equivalent diameter of 10 nm or less is 10precipitates/mmor more. A ratio (Hvs/Hvc) of a hardness at 20 &#x3bc;m in depth from a surface (Hvs) to a hardness of the center of a sheet thickness (Hvc) is 0.85 or more.

Steel sheet and plated steel sheet

A steel sheet wherein a steel structure of an inside of the steel sheet contains, by volume fraction, soft ferrite: 0% to 30%, retained austenite: 3% to 40%, fresh martensite: 0% to 30%, a sum of pearlite and cementite: 0% to 10%, and a remainder including hard ferrite. In the steel sheet, in a &#x215b; to &#x215c; thickness range, a proportion of retained austenite having an aspect ratio of 2.0 or more is 50% or more, and a soft layer having a thickness of 1 to 100 &#x3bc;m from a surface in a sheet thickness direction is present. When an emission intensity at a wavelength indicating Si is analyzed in the sheet thickness direction from the surface by a radio-frequency glow discharge analysis method, a peak of the emission intensity appears in a range of more than 0.2 &#x3bc;m and 5.0 &#x3bc;m or less from the surface.

Steel sheet and manufacturing method of therefor

A steel sheet has a chemical composition with a steel structure containing, by volume fraction, soft ferrite: 0-30%, retained austenite: 3-40%, fresh martensite: 0-30%, pearlite and cementite: 0-10%, and a remainder including hard ferrite. In the steel sheet, a number proportion of retained austenite having an aspect ratio of 2.0 or more in the total retained austenite is 50% or more, and a soft layer having a thickness of 1-100 &#x3bc;m is present. In the soft layer, a volume fraction of ferrite grains having an aspect ratio of less than 3.0 is 50% or more, and a volume fraction of retained austenite is 50% or more of the volume fraction of the retained austenite of the inside of the steel sheet. A peak of an emission intensity at a wavelength indicating Si appears in a range of more than 0.2 &#x3bc;m to 5 &#x3bc;m or less from the surface.

Steel sheet and manufacturing method therefor

To solve the problem about the difference in temperature increasing rate between an overlapped part and a one-sheet part so as to further improve the corrosion resistance of plating after hot stamping. An overlapped blank for hot stamping includes: a first steel sheet; and at least one second steel sheet connected to a surface of the first steel sheet via a welding point and smaller in area than the first steel sheet, wherein: the first steel sheet is a plated steel sheet having an aluminum-based plated layer on both faces of the first steel sheet, and the second steel sheet is a plated steel sheet having an aluminum-based plated layer on both faces of the second steel sheet; a coating weight of the aluminum-based plated layer on the first steel sheet is W1 (g/m) in terms of an average coating weight on both the faces; a coating weight of the aluminum-based plated layer on a surface on a side not in contact with the first steel sheet in the second steel sheet is W2 (g/m); and each of the W1 and the W2 is within a range of 20 g/mor more and 120 g/mor less, and satisfies relationships of Expression (1) and Expression (2).

Overlapped blank for hot stamping, method of manufacturing overlapped hot stamp molded body, and overlapped hot stamp molded body

A high-strength hot-dip galvanized steel sheet contains predetermined amounts of C, Si, Mn, P, S, N, O, sol. Al, Ti, and B, 0.1 to 1.5 mass % of Cr+2&#xd7;Mo, and a balance in a form of Fe and inevitable impurities. A steel structure includes, in area %, ferrite: 1 to 50%, martensite: 20 to 70%, residual austenite: 0 to 5%, pearlite: 0 to 5%, MA and cementite having 0.2 &#x3bc;m or more grain size: 0 to 5% in total, and a balance in a form of bainite. A number density of MA or cementite having 0.2 &#x3bc;m or more grain size and isolated in ferrite or bainite grains is 100 pcs/1000 &#x3bc;mor less, and an average hardness of martensite is in a range from 330 to 500 Hv.

High strength hot-dip galvanized steel sheet and production method therefor

A steel sheet has a specific chemical composition and has a structure represented by, by area ratio, ferrite: 30 to 95%, and bainite: 5 to 70%. When a region that is surrounded by a grain boundary having a misorientation of 15&#xb0; or more and has a circle-equivalent diameter of 0.3 &#x3bc;m or more is defined as a crystal grain, the proportion of crystal grains each having an intragranular misorientation of 5 to 14&#xb0; to all crystal grains is 20 to 100% by area ratio. An average aspect ratio of ellipses equivalent to the crystal grains is 5 or less. An average distribution density of the total of Ti-based carbides and Nb-based carbides each having a grain size of 20 nm or more on ferrite grain boundaries is 10 carbides/&#x3bc;m or less.

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Tokyo, Japan

Masahiro Nakata