Patents Assigned to NKK Corporation
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Patent number: 6635361Abstract: A steel sheet for magnetic shields is provided containing 0.15% by weight or less of C and having a thickness of 0.05-0.5 mm and an anhysteretic magnetic permeability of 7500 or higher.Type: GrantFiled: March 26, 2001Date of Patent: October 21, 2003Assignees: NKK Corporation, Sony CorporationInventors: Reiko Sugihara, Tatsuhiko Hiratani, Hideki Matsuoka, Yasushi Tanaka, Satoshi Kodama, Kenji Tahara, Yasuyuki Takada, Ken-ichi Mitsuzuka
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Publication number: 20030192360Abstract: A material 1 to be shaped is reduced and formed by bringing dies with convex forming surfaces, when viewed from the side of the transfer line of the material 1, close to the transfer line from above and below the material 1, in synchronism with each other, while giving the dies a swinging motion in such a manner that the portions of the forming surfaces of the dies, in contact with the material 1, are transferred from the upstream to the downstream side in the direction of the transfer line.Type: ApplicationFiled: March 24, 2003Publication date: October 16, 2003Applicants: Ishikawajima-Harima Heavy Industries Co., Ltd., NKK CorporationInventors: Shigeki Narushima, Kenichi Ide, Yasushi Dodo, Kazuyuki Sato, Nobuhiro Tazoe, Hisashi Sato, Yasuhiro Fujii, Isao Imai, Toshihiko Obata, Sadakazu Masuda, Shuichi Yamashina, Shozo Ikemune, Satoshi Murata, Takashi Yokoyama, Hiroshi Sekine, Yoichi Motoyashiki
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Patent number: 6632295Abstract: A high tensile strength hot-rolled steel sheet comprises 0.04 to 0.09% C, 0.1% or less Si, 0.5 to 1.5% Mn, 0.02% or less P, 0.01% or less S, 0.1% or less Al, 0.001 to 0.008% N, and 0.01 to 0.15% Ti, by mass %, the content of ingredient there each satisfying the equation (1), and the ferritic grain size &agr; (&mgr;m) satisfying the equation (2): [C]+7×[Si]+0.1×[Mn]+[P]+14×[S]+1.75×[Al] +23×[N]+[Ti]+18×[O]+7×[Cu]+18×[Sn]+7×[Mo]+ 1.7×[Cr]+70×[B]+7×[Ca]+14×[Zr]+14×[V]+7×[Nb] ≦2 (1) 3≦&agr;≦60×[Ti]+8 (2) where, [X] denotes the content (mass %) of element X.Type: GrantFiled: May 24, 2001Date of Patent: October 14, 2003Assignee: NKK CorporationInventors: Hiroshi Nakata, Tadashi Inoue, Hiroyasu Kikuchi, Sadanori Imada, Akira Hiura, Takeshi Nakahara, Satoshi Ishijima, Yoshimasa Funakawa, Toru Inazumi
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Publication number: 20030188559Abstract: A material 1 to be shaped is reduced and formed by bringing dies with convex forming surfaces, when viewed from the side of the transfer line of the material 1, close to the transfer line from above and below the material 1, in synchronism with each other, while giving the dies a swinging motion in such a manner that the portions of the forming surfaces of the dies, in contact with the material 1, are transferred from the upstream to the downstream side in the direction of the transfer line.Type: ApplicationFiled: March 24, 2003Publication date: October 9, 2003Applicants: Ishikawajima-Harima Heavy Industries Co., Ltd., NKK CorporationInventors: Shigeki Narushima, Kenichi Ide, Yasushi Dodo, Kazuyuki Sato, Nobuhiro Tazoe, Hisashi Sato, Yasuhiro Fujii, Isao Imai, Toshihiko Obata, Sadakazu Masuda, Shuichi Yamashina, Shozo Ikemune, Satoshi Murata, Takashi Yokoyama, Hiroshi Sekine, Yoichi Motoyashiki
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Publication number: 20030177805Abstract: A material 1 to be shaped is reduced and formed by bringing dies with convex forming surfaces, when viewed from the side of the transfer line of the material 1, close to the transfer line from above and below the material 1, in synchronism with each other, while giving the dies a swinging motion in such a manner that the portions of the forming surfaces of the dies, in contact with the material 1, are transferred from the upstream to the downstream side in the direction of the transfer line.Type: ApplicationFiled: March 24, 2003Publication date: September 25, 2003Applicants: Ishikawajima-Harima Heavy Industries Co., Ltd., NKK CorporationInventor: Nobuhiro Tazoe
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Patent number: 6623573Abstract: The method for manufacturing steel sheet comprises the steps of: forming a sheet bar; forming a steel strip; primary-cooling; air-cooling; secondary-cooling; and coiling. The sheet bar is finish-rolled at finish temperatures of (Ar3 transformation point −20° C.) or more. The primary cooling cools the finish-rolled steel strip at cooling speeds of more than 120° C./sec down to the temperatures ranging from 500 to 800° C.Type: GrantFiled: April 19, 2001Date of Patent: September 23, 2003Assignee: NKK CorporationInventors: Tadashi Inoue, Yoichi Motoyashiki, Hiroyasu Kikuchi, Sadanori Imada
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Patent number: 6617048Abstract: A prepainted steel sheet has a chemically conversion-treated zinc-plated steel sheet and a coating formed on the surface of said zinc-plated steel sheet. The coating is formed by painting and baking of a solvent-type-paint composition. The paint composition contains a polyester resin.Type: GrantFiled: March 27, 2000Date of Patent: September 9, 2003Assignees: NKK Corporation, Dai Nippon Toryo Co., Ltd.Inventors: Keiji Yoshida, Kazumi Ito, Masaaki Yamashita, Hiroyuki Kato, Yasuhiro Toyoda, Yasuyuki Kajita, Susumu Ogawa, Nobuyoshi Kato
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Patent number: 6610422Abstract: The method for manufacturing coated steel sheet has the steps of: immersing a steel sheet in a hot-dip coating bath to form an Al—Zn base coating layer containing 20 to 95 mass % Al on the steel sheet, forming a passivated layer on the coating layer; and applying thermal history to the coating layer. The thermal history is applied immediately after the steel sheet left the hot-dip coating bath or in a temperature range of from T(° C.) between 130° C. and 300° C. to 100° C.Type: GrantFiled: September 26, 2002Date of Patent: August 26, 2003Assignee: NKK CorporationInventors: Toshihiko Ooi, Takafumi Yamaji, Keiji Yoshida, Yuichiro Tanaka, Junichi Inagaki, Masaaki Yamashita, Yasuhiro Majima, Nobuyuki Ishida, Yuichi Fukushima, Norio Inoue, Shinji Hori
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Patent number: 6607569Abstract: Disclosed is a method of estimating the outflow amount for each component of the effluent of a coal liquefying reactor consisting of vessel type reactors (16a, 16b, 16c) operated under a high temperature and a high pressure. The outflow amount for each component of the effluent is assumed, and the gas-liquid equilibrium composition of the mixture of the composition within the reaction vessel is calculated. Further, the volume flow rates of the gaseous phase and the liquid phase within the reaction vessel are calculated, and the residence time (&tgr;1G, &tgr;2G, &tgr;3G), (&tgr;1S, &tgr;2S, &tgr;3S) of each of the gaseous phase and the liquid phase is calculated on the basis of the gas hold-up within the reaction vessel calculated on the basis of the volume flow rate and the empirical formula. The outflow amount for each component of the effluent is calculated on the basis of the residence time (&tgr;1, &tgr;, . . .Type: GrantFiled: October 13, 2000Date of Patent: August 19, 2003Assignees: Sumitomo Metal Industries, Ltd., Idemitsu Kosan Co., Ltd., Nippon Steel Corporation, Chiyoda Corporation, NKK Corporation, Mitsui Engineering & Shipbuilding Co., Ltd., Mitsubishi Heavy Industries, Ltd., Japan Energy Corporation, Sumitomo Metal Mining Co., Ltd., Asahi Kasei Kogyo Kabushiki Kaisha, Sumitomo Coal Mining Co., Ltd., The Japan Steel Works, Ltd., Yokogawa Electric CorporationInventors: Yasuki Namiki, Masatoshi Kobayashi, Akira Kidoguchi, Hidenobu Itoh, Masataka Hiraide, Kunihiro Imada, Kenji Inokuchi
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Publication number: 20030141036Abstract: The present invention provides a manufacturing method for a continuously cast product of steel comprising the steps of: detecting a position of crater end of product by a method for measuring a solidification state of continuously cast product using a sensor arranged so as to be in non-contact with the product; and controlling at least one condition selected from the conditions of the casting speed and the quantity of secondary cooling water based on the detected position of crater end, the method for measuring a solidification state of continuously cast product comprising the steps of: cooling the product until a surface layer portion thereof is &agr; transformed; transmitting transverse waves of electromagnetic ultrasonic waves to the cooled product; receiving the signal after the transmitting signal propagates in the product; and judging the solidification state of the product based on the received signal.Type: ApplicationFiled: December 18, 2002Publication date: July 31, 2003Applicant: NKK CorporationInventors: Yukinori Iizuka, Yutaka Awajiya, Masayuki Nakada, Makoto Suzuki, Koichi Tsutsumi
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Publication number: 20030129034Abstract: A burr located at an edge of a steel piece is cut by disposing a cutter such that the flank of the cutter is substantially in parallel with the surface of the steel piece and the angle between the cutting edge of the cutter and the edge of the steel piece which the burr intersects is at least 45°. The cutter is relatively moved toward the outside of the steel piece along the lengthwise direction of the burr, or the cutter is disposed with the flank of the cutter substantially in parallel with the surface of the steel piece and the angle between the cutting edge of the cutter and the edge of the steel piece is at least 90°. The burr located at the edge of the steel piece is cut by relatively moving the cutter perpendicularly to the lengthwise direction of the burr.Type: ApplicationFiled: February 21, 2003Publication date: July 10, 2003Applicant: NKK Corporation, a corporation of JapanInventors: Koji Yamashita, Hiromasa Hayashi, Susumu Okawa, Koji Okushima
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Publication number: 20030121576Abstract: The present invention relates to a steel sheet that consists essentially of 0.10 to 0.37% C, 1% or less Si, 2.5% or less Mn, 0.1% or less P, 0.03% or less S, 0.01 to 0.1% sol.Al, 0.0005 to 0.0050% N, 0.0003 to 0.0050% B, by mass, and balance of Fe, [14B/(10.8N)] being 0.5 or more, average particle size of precipitate BN being 0.1 &mgr;m or more, and grain size of prior austenite after the hardening treatment being 2 to 25 &mgr;m. The steel sheet according to the present invention allows an inexpensive hardening treatment method to be applied to improve the strength to a level required for the structural components and the functional components of automobiles, while providing excellent toughness after the hardening treatment.Type: ApplicationFiled: September 26, 2002Publication date: July 3, 2003Applicant: NKK CORPORATIONInventors: Takeshi Fujita, Kenichi Mitsuzuka, Nobuyuki Nakamura, Toshiaki Urabe, Katsutoshi Ito, Hideyuki Tsurumaru
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Patent number: 6566796Abstract: A method of making a steel sheet for a tension mask, including the steps of: hot rolling a steel consisting essentially of, by weight %, C: less than 0.1%, Si: 0.05% or less, Mn: 0.4 to 2%, P: 0.03% or less, S: 0.03% or less, sol.Al: 0.01% or less, N: 0.010% or more, and the balance of Fe; and annealing the cold rolled steel sheet, followed by a secondary cold rolling at a reduction rate of 35% or higher. The steel sheet produced by this method shows excellent creep resistance during blackening treatment and excellent magnetic shielding property with an anhysteretic permeability of 3400 or more at a DC bias magnetic field of 0.35 Oe, and therefore causes no color-deviation when applied to the tension mask.Type: GrantFiled: August 14, 2001Date of Patent: May 20, 2003Assignees: NKK Corporation, Sony CorporationInventors: Satoshi Kodama, Reiko Sugihara, Hideki Matsuoka, Yasushi Tanaka, Tatsuhiko Hiratani, Kenji Tahara, Kenichi Mitsuzuka, Kenichiro Takayanagi, Masamichi Okada, Hiroaki Kato, Chohachi Sato
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Patent number: 6562306Abstract: An apparatus for producing dimethyl ether comprising: a slurry-bed reactor filled with a dimethyl ether synthesis catalyst and a medium oil therefor; a condenser for condensing a gasified medium oil discharged from the reactor; an adsorber for removing a catalyst-deactivation ingredient from the medium oil condensed in the condenser; and recycle means for recycling the medium oil to the slurry-bed reactor.Type: GrantFiled: June 2, 2000Date of Patent: May 13, 2003Assignee: NKK CorporationInventors: Tsutomu Shikada, Takashi Ogawa, Masatsugu Mizuguchi, Masami Ono
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Patent number: 6560971Abstract: A method and apparatus for making a hydrate slurry, which involves the preparation of an aqueous solution of a guest compound for forming a clathrate hydrate, cooling the aqueous solution, and contacting the aqueous solution with nuclear particles. A thermal storage method, a thermal storage apparatus, and a thermal storage medium using an aqueous solution of a clathrate hydrate, in a concentration which provides a congruent melting point or lower. A refrigerating apparatus and an air conditioner using the thermal storage apparatus and the thermal storage medium.Type: GrantFiled: October 24, 2001Date of Patent: May 13, 2003Assignee: NKK CorporationInventors: Shingo Takao, Hidemasa Ogoshi, Shigenori Matsumoto
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Patent number: 6562474Abstract: A coated steel sheet having excellent corrosion resistance comprises: a zinc or a zinc alloy plated steel sheet or an aluminum or an aluminum alloy plated steel sheet; a composite oxide coating formed on the surface of the plated steel sheet; and an organic coating formed on the composite oxide coating. The composite oxide coating contains a fine particle oxide and a phosphoric acid and/or a phosphoric acid compound. The organic coating has thickness of from 0.1 to 5 &mgr;m.Type: GrantFiled: June 26, 2000Date of Patent: May 13, 2003Assignee: NKK CorporationInventors: Naoto Yoshimi, Satoru Ando, Masaru Sagiyama, Akihiko Furuta, Masaaki Yamashita, Akira Matsuzaki, Takafumi Yamaji, Tatsuya Miyoshi, Takahiro Kubota, Yasuhiko Haruta, Hiroyasu Matsuki, Kenichi Tomita
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Patent number: 6562150Abstract: A steel sheet for heat shrink band of the present invention has anhysteretic magnetic permeability of 15,000 or higher at 0.35 Oe and yield stress of 24 kgf/mm2 or more. The steel sheet can be manufactured by a method comprising the steps of: hot rolling and/or cold rolling a steel containing 0.01 to 0.15% C by weight; annealing the rolled steel sheet at a temperature ranging from 650 to 900° C.; and temper rolling the annealed steel sheet at a rolling reduction rate of 1.5% or less. A CRT made of the steel sheet causes very little color deviation and practically no deformation of the panel surface.Type: GrantFiled: March 9, 2001Date of Patent: May 13, 2003Assignees: NKK Corporation, Sony CorporationInventors: Tatsuhiko Hiratani, Hideki Matsuoka, Yasushi Tanaka, Reiko Sugihara
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Patent number: 6559931Abstract: A 3-D coordinate measurement is performed in such a way that an electrooptical distance-measuring device is used to measure a linear distance to a target point set on a surface of a measurement object, an angle measuring device is used to measure shifted angles of an optical axis of the electrooptical distance-measuring device, and a 3-D coordinate of the target point is measured according to a measured distance and a measured angle after the optical axis of the electrooptical distance-measuring device has been aligned to the target point.Type: GrantFiled: September 20, 2002Date of Patent: May 6, 2003Assignee: NKK CorporationInventors: Tsutomu Kawamura, Mitsuaki Uesugi, Hirohiko Yanagita, Noboru Kawasaki, Hisashi Ito
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Patent number: 6554925Abstract: The method for manufacturing cold-rolled steel sheet comprises the steps of: rough-rolling a slab using a rough-rolling unit; finish-rolling the sheet bar using a continuous hot finishing-rolling mill; cooling the hot-rolled steel strip on a runout table; coiling thus cooled hot-rolled steel strip; and applying picking, cold-rolling the hot-rolled steel strip, and final annealing to the cold-rolled steel strip.Type: GrantFiled: March 29, 2001Date of Patent: April 29, 2003Assignee: NKK CorporationInventors: Tadashi Inoue, Yasuhide Ishiguro, Yoichi Motoyashiki, Sadanori Imada, Toru Inazumi
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Patent number: 6554917Abstract: A steel sheet for preparing a heat shrink band effective for preventing the color drift is provided by a steel sheet having 24 kg/mm2 or higher of yield stress and 400 or higher of the product between the permeability &mgr; under a magnetic field of 0.3 Oe and the sheet thickness.Type: GrantFiled: March 19, 2001Date of Patent: April 29, 2003Assignees: NKK Corporation, Sony CorporationInventors: Nobuo Yamagami, Kunikazu Tomita, Yasuyuki Takada, Yoshihiko Oda, Chohachi Sato, Teruo Takeuchi, Ichiro Saito, Hiroaki Kato