Nippon Steel & Sumitomo Metal Corporation

Nippon Steel Corporation

Nippon Steel & Sumitomo Metal Corporatin

Atsushi Seto

Hiroyuki Yamaguchi

Koichi Hamada

Eisaku Sakurada

Hiroshi Nogami

Kenji Imanishi

Naruhiko Nomura

Hiroshi Fukuchi

Takashi Matsuno

Noriyuki Suzuki

Naoki Maruyama

Tatsuo Yokoi

Kaoru Kawasaki

Naoki Yoshinaga

Masaaki Mizumura

Yasunobu Miyazaki

Shuji Yamamoto

Takuya Kuwayama

Takeshi Kawachi

Toshiyuki Niwa

Masayoshi Suehiro

Hatsuhiko Oikawa

Nobutaka Shimizu

Atsushi Itami

Hiroyuki Tanahashi

Seiichi Daimaru

Katsumi Kurebayashi

Tatsuya Sakiyama

Yuuichi Yosida

Shuji Aihara

Yoshihito Sekito

Tamaki Suzuki

The disclosed heat generating apparatus includes: a rotary shaft, a heat generator, a plurality of permanent magnets, a magnet holder, and a heat recovery system. The rotary shaft is rotatably supported by a non-rotative body. The heat generator is fixed to the body. The magnets are arrayed to face the heat generator with a gap such that magnetic pole arrangements of adjacent ones of the magnets are opposite to each other. The magnet holder holds the magnets and is fixed to the rotary shaft. The heat recovery system collects heat generated in the heat generator. A non-magnetic partition wall is provided in the gap between the heat generator and the magnets.

Eddy current heat generating apparatus

The disclosed heat generating apparatus includes: a rotary shaft, a heat generator, a plurality of permanent magnets, a magnet holder, and a heat recovery system. The rotary shaft is rotatably supported by a non-rotative body. The heat generator is fixed to the rotary shaft. The magnets are arrayed to face the heat generator with a gap such that magnetic pole arrangements of adjacent ones of the magnets are opposite to each other. The magnet holder holds the magnets and is fixed to the body. The heat recovery system collects heat generated in the heat generator.

A transportation vehicle part includes: a patch memberconstructed of a plate-like metal patch panel, and a vibration attenuating resin layerprovided along a surface of the patch panel; and a metal base plateclosely adhered with the vibration attenuating resin layerof the patch memberand affixed with the patch member. The patch panelis produced via a rolling step. An acute angle between a longitudinal direction and a rolling direction of the patch panelis 30 to 70 degrees. According to this structure, the natural frequency in a primary mode is made high, whereby the vibration characteristic is improved.

Transportation vehicle part and panel member therefor

A steel sheet heating method that heats a steel sheet (K) to be pressed before hot press molding includes: bringing the steel sheet into a heating furnace () including a heater () on an inside surface of the heating furnace in a state where the steel sheet is supported in a vertical direction while an unnecessary portion of the steel sheet that becomes unnecessary after molding is fixedly supported by a support member (); and performing heating at a prescribed temperature in the heating furnace, then taking the steel sheet out of the heating furnace, and after that cutting and removing the unnecessary portion before hot press molding or during hot press molding.

Steel sheet heating method and steel sheet heating apparatus

In hot press forming a thin steel sheet K, when cooling the thin steel sheet K by supplying a refrigerant to an ejection hole () communicated from a supply path () inside a lower mold (), precooling in which an ejection amount per unit time period of the refrigerant from the ejection hole () is suppressed is carried out, and thereafter, main cooling is carried out by increasing the ejection amount per unit time period.

Cooling method for hot press forming and hot press forming apparatus

A transportation vehicle part that includes: a patch member constructed of a plate-like metal patch panel, and a vibration attenuating resin layer provided along a surface of the patch panel; and a metal base plate closely adhered with the vibration attenuating resin layer of the patch member and affixed with the patch member; according to this configuration, the transportation vehicle part which has a superior vibration characteristic without greatly increasing the thickness and the weight of the transportation vehicle part is provided.

A fuel tank for a vehicle is formed of a tank main body in which an upper tank and a lower tank are mutually joined to form a closed space in which fuel is housed, and a sub-tank fixed to a bottom surface part of the lower tank by spot welding, in which a plurality of rows of the spot welding are set along a longitudinal direction of the lower tank with an interval therebetween in a width direction of the sub-tank, at least one bead positioned between the rows of the spot welding and extending continuously along the longitudinal direction of the lower tank is formed on the bottom surface part of the lower tank, and a lower surface of the sub-tank has no portion that is not brought into contact with the bottom surface part of the lower tank except for the bead.

Fuel tank for vehicle

A hot rolled steel sheet consisting of, in mass %, C: 0.05% to 0.15%, Si: 0% to 0.2%, Al: 0.5% to 3.0%, Mn: 1.2% to 2.5%, P: 0.1% or less, S: 0.01% or less, N: 0.007% or less, Ti: 0.03% to 0.10%, Nb: 0.008% to 0.06%, V: 0% to 0.12%, one or more of Cr, Cu, Ni, and Mo: 0% to 2.0% in total, B: 0% to 0.005%, one or more of Ca, Mg, La, and Ce: 0% to 0.01% in total, total amount of Si and Al: 0.8&#xd7;(Mn&#x2212;1)% or more, total amount of Ti and Nb: 0.04% to 0.14%, and the balance: Fe and impurities. In a structure of steel, a total area ratio of martensite and retained austenite is 3% to 20%, an area ratio of ferrite is 50% to 96%, and an area ratio of pearlite is 3% or less. In a superficial layer part, the thickness in a sheet thickness direction of a region in which a network-like oxide is present is less than 0.5 &#x3bc;m, and a maximum tensile strength is 720 MPa or more.

Hot rolled steel sheet and method for manufacturing the same

A structure including a structural member configured like a frame with four sides is disclosed. A closed cross-section structural member serving as a reinforcing material is provided in a crossing corner of the structural member. The closed cross-section structural member includes two horizontal portions separated from each other in a thickness direction of the structural member and extending in an in-plane direction of the structural member and two vertical portions one of which connects first ends of the two horizontal portions together and the other of which connects second ends of the two horizontal portions together. The closed cross-section structural member includes a first opening formed therein facing an inner-peripheral flat surface of the structural member and a second opening formed therein facing inside of the structural member.

Structure including a frame having four sides and a closed cross-section structural member

A structure () for a front section of a vehicle body in a vehicle body () comprising a front chamber () disposed on the forward side of a vehicle interior () is provided with the following: a pair of front side members (), located within the front chamber, that extend in the longitudinal direction of the vehicle body; a pair of strut towers () disposed on either side in the width direction of the front chamber and within which front wheel suspensions are disposed; and reinforcement members () that link the top of each strut tower with the front side members that face the strut towers, and that extend between the strut towers and the front side members. This configuration allows a structure for a front section of a vehicle body to be provided that can efficiently improve the rigidity of the vehicle body of an automobile against torsion and against lateral bending, and that can efficiently reduce the weight of the vehicle body by means of thickness reduction using a high-strength steel plate.

Front body structure

In the process of target stamping for fracture judgment, an acquisition unit acquires, as target data for fracture judgment, strain of a target die to be measured over the duration from the start time of stamping measured by strain measuring units to the finishing time of stamping, and also acquires production conditions typically by measurement. An extraction unit extracts the reference data, which gives the minimum total of differences between the production conditions of the reference data and the production conditions of the target data for fracture judgment, as the comparative data. A judging unit compares strain in the comparative data extracted by the extraction unit and strain in the target data for fracture judgment, and judges occurrence of a crack in a stamped product, if the maximum value of the difference is not smaller than a predetermined value.

Method and apparatus for judging fracture of metal stamped product, program and computer-readable recording medium

High tensile steel having excellent fatigue strength at its weld and

Growing community of inventors

Tokyo, Japan

Atsushi Seto