Nippon Steel Sumitomo Metal Corporation

Nippon Steel Corporation

Yokogawa Electric Corporation

Asahi Kasei Kabushiki Kaisha

Mitsubishi Kasei Corporation

Tdk Corporation

Satoshi Kato

Toshiki Nonaka

Kaoru Kawasaki

Toshimasa Tomokiyo

Nobuo Kadowaki

Tomohiro Mizutani

Kojiro Akiba

Kazushi Iwakiri

Hirokazu Taniguchi

Eiji Tanaka

Kaoru Sato

Toshiaki Nagasawa

Koichi Sato

Hirokazu Kobayashi

Hiroaki Tanaka

Masafumi Azuma

Yoshiaki Tanaka

Yoshinori Suga

Takuya Nishio

Yukiyo Akisada

Nobuo Okabe

Hideki Hamatani

Kenichiro Matsumura

Kazuma Takenaka

Kazunori Miyazawa

Yusuke Kondo

Takaaki Fukushi

Akihiro Sengoku

Yoshiaki Hirota

Takuto Horii

Yosuke Ishii

Sho Fujita

Minako Terao

Akihiko Hirata

Yoichiro Mori

Toshiyuki Saruya

Shinya Mito

Ken'ichi Kamada

Yoshimasa Narita

Tadaaki Ochiai

Yoshitaka Kikuchi

Toshiki Hattori

Hiroki Murayama

Koji Yanaba

Kazuo Satou

Tsuneki Tanaka

Kotaro Ohno

A can lid made of a resin laminate steel sheet for a resin-metal composite container, includes: a top sheet portion; and a curved portion located at an outer periphery of the top sheet portion, in which the resin laminate steel sheet includes a steel sheet, a thermoplastic polyester-based resin layer provided at a first surface of the steel sheet, a modified polypropylene-based resin layer provided at a second surface of the steel sheet, a polypropylene-based resin layer, and an ethylene-propylene copolymer resin layer, a melting point of the ethylene-propylene copolymer resin layer is 135° C. or higher and 150° C. or lower, a melting point of the thermoplastic polyester-based resin layer is higher than a melting point of the polypropylene-based resin layer by 40° C. or more, and a range of a proportion of the ethylene component in the ethylene-propylene copolymer in the ethylene-propylene copolymer resin layer is 1.0 mass % or more and 45.0 mass % or less.

Can lid made of resin laminate steel sheet for resin-metal composite container, can bottom made of resin laminate steel sheet for resin-metal composite container, and resin-metal composite container

A hot stamped component, includes: a base material; and a Zn-based plating layer provided in contact with the base material as an upper layer of the base material and containing Zn and Ni. A region of the Zn-based plating layer on a base material side is a Fe—Zn solid solution containing Ni, and two or more twins exist in 10 crystal grains of the Fe—Zn solid solution containing Ni adjacent to an interface between the base material and the Zn-based plating layer.

Hot stamped component

The purpose of the present invention is to provide a, polyimide film having high transparency and improved bending resistance against multiple times of bending, and a varnish capable of providing such a polyimide film. The varnish according to the present invention contains a polymer (&#x3b1;) and a solvent (&#x3b2;). The polymer (&#x3b1;) is polyimide or a polyimide precursor. The varnish further contains a typical metal element having an atomic weight of 26-201 except alkali metals and alkaline earth metals, or at least one metal element among transition metal elements having an atomic weight of 26-201 or less. At least one of the metal elements contained in the varnish is present in an amount of 0.05-500 ppm relative to the polymer (&#x3b1;).

Polyimide varnish and method for producing same

A heat sealed lid includes: a resin laminate aluminum foil; and a first seamed side frame portion and a second seamed side frame portion formed of a resin film laminate metal sheet, in which the resin film laminate metal sheet includes a metal sheet, a laminate film formed on one surface of the metal sheet, and a second resin film formed on the other surface of the metal sheet and containing a thermoplastic polyester resin, the laminate film includes an adhesion layer containing a polypropylene-based resin and a polyethylene-based resin and a base layer containing a modified polypropylene-based resin, an amount of the polyethylene-based resin in the adhesion layer is 1.0 mass % or more and 45.0 mass % or less of the resins of the adhesion layer, the melting point of the second resin film is higher than the melting point of the adhesion layer by 40&#xb0; C. or more and is higher than the heating temperature of a heat sealing tool, the thickness of the adhesion layer is 1.0 &#x3bc;m or more and 15.0 &#x3bc;m or less, and the thickness of the base layer is 1.0 &#x3bc;m or more and 18.0 &#x3bc;m or less.

Heat sealed lid and can

This high-strength cold-rolled steel sheet has a predetermined chemical composition, wherein a microstructure at a &#xbc; position of a sheet thickness from a surface includes predetermined ranges of volume percentages of tempered martensite, residual austenite, ferrite and bainite, and martensite, wherein a microstructure at a position 25 &#x3bc;m from the surface includes, predetermined ranges of volume percentage of ferrite and bainite, and martensite and tempered martensite, wherein in the position 25 &#x3bc;m from the surface, an average grain size of the martensite and the tempered martensite is 5.0 &#x3bc;m or less, a tensile strength is 1,310 MPa or more, and a uniform elongation is 5.0% or more, and R/t is 5.0 or less, the R/t being a ratio of a limit bend radius R in 90&#xb0; V-bending to a sheet thickness t.

High-strength cold-rolled steel sheet and manufacturing method therefor

A film-laminated metal plate having excellent retort adhesiveness includes: a metal plate; a resin film thermally fusion-bonded to a surface of the metal plate; and a bubble contained between the metal plate and the resin film. An average bubble height of three bubbles with higher heights among the bubbles measured by using a 3D analysis image of a laser microscope is 0 &#x3bc;m or more and 5.0 &#x3bc;m or less. The test piece is obtained by cutting a portion of one end side of the metal plate in a longitudinal direction while leaving the resin film on a side which becomes an inner surface side of the container when the film-laminated metal plate is processed into a container. When a retort treatment is carried out on the test piece at a temperature of 125&#xb0; C. for 30 minutes in a state in which a 100 g weight is hung from the one end side of the test piece and the test piece is folded back toward the other end side of the test piece in the longitudinal direction by 180&#xb0;, a length of the resin film peeled off from the metal plate of the test piece is 15 mm or less.

Film-laminated metal plate having excellent retort adhesiveness, and method for manufacturing same

To provide polyimide films that contain polyimide good in solubility in solvent and excel lent in workability and that are colorless, transparent and excellent in toughness, polyimide varnishes, and products and layered products using the polyimide film, the polyimide film is characterized by containing polyimide expressed by following general formula (1), and containing as A in the general formula (1), a structure expressed by following general formula (A-1), for example, structure expressed by following general formula (A-5).  Herein, in the general formula (1), A represents a bivalent organic group, B represents a tetravalent organic group, and n is 2 or more. 

Polyimide film, polyimide varnish, and product and layered product using the polyimide film

A hot stamp molded body that can be produced highly efficiently without causing sticking of plating to a mold, when an electrogalvanized steel sheet with a light plating weight is hot-stamped using a rapidly heating method such as Joule heating and induction heating, and can secure favorable paint adhesiveness without a posttreatment such as shotblasting after hot stamping, as well as a method for producing the same. A hot stamp molded body is produced by hot-stamping an electrogalvanized steel sheet which is composed of predetermined components, and is electrogalvanized on each face with a plating weight not less than 5 g/mand less than 40 g/m; and therein a galvanized layer of the hot stamp molded body is configured with 0 g/mto 15 g/mof a Zn&#x2014;Fe intermetallic compound and a Fe&#x2014;Zn solid solution phase as a balance, and in the galvanized layer of the hot stamp molded body 1&#xd7;10 pcs to 1&#xd7;10pcs of particulate matter with an average diameter of from 10 nm to 1 &#x3bc;m are present per 1 mm length of the galvanized layer.

Hot stamp molded body, and method for producing hot stamp molded body

A cold-rolled steel sheet has a predetermined chemical composition, in which a structure before and after a hot-stamping includes ferrite: 30 area % to 90 area %, martensite: 0 area % or more and less than 20 area %, pearlite: 0 area % to 10 area %, retained austenite: 5 volume % to 20 volume %, and rest structure: bainite, a hardness of the retained austenite measured with a nano indenter before and after the hot-stamping satisfies relations of H/H&#x3c;1.1 and &#x3c3;HM&#x3c;20, and a relation of TS&#xd7;El&#x2265;20000 MPa&#xb7;% is satisfied.

Cold-rolled steel sheet and method for manufacturing same, and hot-stamp formed body

A hot stamped steel according to the present invention satisfies an expression of (5&#xd7;[Si]+[Mn])/[C]&#x3e;11 when [C] represents an amount of C by mass %, [Si] represents an amount of Si by mass %, and [Mn] represents an amount of Mn by mass %, a metallographic structure after hot stamping includes 40% to 90% of a ferrite and 10% to 60% of a martensite in an area fraction, a total of an area fraction of the ferrite and an area fraction of the martensite is 60% or more, a hardness of the martensite measured with a nanoindenter satisfies an H2/H1&#x3c;1.10 and &#x3c3;HM&#x3c;20, and TS&#xd7;&#x3bb;, which is a product of a tensile strength TS and a hole expansion ratio &#x3bb; is 50000 MPa&#xb7;% or more.

Hot stamped steel and method for producing hot stamped steel

A cold rolled steel sheet according to the present invention satisfies an expression of (5&#xd7;[Si]+[Mn])/[C]&#x3e;11 when [C] represents an amount of C by mass %, [Si] represents an amount of Si by mass %, and [Mn] represents an amount of Mn by mass %, a metallographic structure before hot stamping includes 40% to 90% of a ferrite and 10% to 60% of a martensite in an area fraction, a total of an area fraction of the ferrite and an area fraction of the martensite is 60% or more, a hardness of the martensite measured with a nanoindenter satisfies an H2/H1&#x3c;1.10 and &#x3c3;HM&#x3c;20 before the hot stamping, and TS&#xd7;&#x3bb; which is a product of a tensile strength TS and a hole expansion ratio &#x3bb; is 50000 MPa&#xb7;% or more.

Cold rolled steel sheet and method for producing cold rolled steel sheet

In a hot stamped steel, when [C] represents an amount of C (mass %), [Si] represents an amount of Si (mass %), and [Mn] represents an amount of Mn (mass %), an expression of 5&#xd7;[Si]+[Mn])/[C]&#x3e;10 is satisfied, a metallographic structure includes 80% or more of a martensite in an area fraction, and optionally, further includes one or more of 10% or less of a pearlite in an area fraction, 5% or less of a retained austenite in a volume ratio, 20% or less of a ferrite in an area fraction, and less than 20% of a bainite in an area fraction, TS&#xd7;&#x3bb;, which is a product of TS that is a tensile strength and &#x3bb; that is a hole expansion ratio is 50000 MPa&#xb7;% or more, and a hardness of the martensite measured with a nanoindenter satisfies H2/H1&#x3c;1.10 and &#x3c3;HM&#x3c;20.

Hot stamped steel and method for producing the same

A quenched steel pipe member is formed of a GI galvanized steel pipe, in a middle section in a longitudinal direction of the GI galvanized steel pipe, a cross-section perpendicular to the longitudinal direction has a substantially V shape including a contact section at which opposite parts of an inner circumferential surface of the GI galvanized steel pipe come into contact with each other, the contact section is bonded using a Fe&#x2014;Zn alloy phase, and a micro Vickers hardness at a location 50 &#x3bc;m deep from a base material surface layer is 95% or more of a micro Vickers hardness at a location 200 &#x3bc;m deep from the base material surface layer.

Quenched steel pipe member, vehicle axle beam using quenched steel pipe member, and method for manufacturing quenched steel pipe member

An ultrasonic pipe measurement apparatus includes: a plurality of ultrasonic transceivers discretely disposed on a pipe wall of a pipe; and a control unit configured to control the plurality of ultrasonic transceivers and detect a generation point of damage caused in the pipe based on an ultrasonic signal exchanged between the ultrasonic transceivers.

Ultrasonic pipe measurement apparatus

When the amount of C, the amount of Si and the amount of Mn are respectively represented by [C], [Si] and [Mn] in unit mass %, the cold rolled steel sheet satisfies a relationship of (5&#xd7;[Si]+[Mn])/[C]&#x3e;10, the metallographic structure contains, by area ratio, 40% to 90% of a ferrite and 10% to 60% of a martensite, further contains one or more of 10% or less of a pearlite by area ratio, 5% or less of a retained austenite by volume ratio and 20% or less of a bainite by area ratio, the hardness of the martensite measured using a nanoindenter satisfies H20/H10&#x3c;1.10 and &#x3c3;HM0&#x3c;20, and TS&#xd7;&#x3bb; representing the product of TS that is a tensile strength and &#x3bb; that is a hole expansion ratio is 50000 MPa&#xb7;% or more.

Cold rolled steel sheet and manufacturing method thereof

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Tokyo, Japan

Satoshi Kato