Patents by Inventor Yoshihiro Okamura
Yoshihiro Okamura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20180237883Abstract: In a journal part of a 9 to 12 wt % Cr steel turbine rotor, a groove face is formed, and on the groove face, a lower build-up layer is formed by using a first welding material containing C: 0.10 to 0.25 wt %, Si: 0.20 to 0.80 wt %, Mn: 1.0 to 2.5 wt %, Ni: 0.4 to 1.0 wt %, Cr: 1.0 to 3.0 wt %, Mo: 0.2 to 1.5 wt %, V: 0.03 to 0.10 wt %, and a remainder composed of Fe and inevitable impurities, and further on this lower build-up layer, an upper build-up layer is formed using a second welding material containing C: 0.10 to 0.25 wt %, Si: 0.20 to 0.80 wt %, Mn: 1.0 to 2.5 wt %, Ni: 0.4 to 1.0 wt %, Cr: 1.0 to 3.0 wt %, Mo: 0.2 to 1.5 wt %, and a remainder consisting of Fe and inevitable impurities.Type: ApplicationFiled: April 17, 2018Publication date: August 23, 2018Applicant: JAPAN CASTING & FORGING CORPORATIONInventors: Yoshihiro Okamura, Yasushi Wakeshima
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Patent number: 9976197Abstract: In a journal part of a 9 to 12 wt % Cr steel turbine rotor, a groove face is formed, and on the groove face, a lower build-up layer is formed by using a first welding material containing C: 0.10 to 0.25 wt %, Si: 0.20 to 0.80 wt %, Mn: 1.0 to 2.5 wt %, Ni: 0.4 to 1.0 wt %, Cr: 1.0 to 3.0 wt %, Mo: 0.2 to 1.5 wt %, V: 0.03 to 0.10 wt %, and a remainder composed of Fe and inevitable impurities, and further on this lower build-up layer, an upper build-up layer is formed using a second welding material containing C: 0.10 to 0.25 wt %, Si: 0.20 to 0.80 wt %, Mn: 1.0 to 2.5 wt %, Ni: 0.4 to 1.0 wt %, Cr: 1.0 to 3.0 wt %, Mo: 0.2 to 1.5 wt %, and a remainder consisting of Fe and inevitable impurities.Type: GrantFiled: November 24, 2014Date of Patent: May 22, 2018Assignee: JAPAN CASTING & FORGING CORPORATIONInventors: Yoshihiro Okamura, Yasushi Wakeshima
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Publication number: 20160145711Abstract: In a journal part of a 9 to 12 wt % Cr steel turbine rotor, a groove face is formed, and on the groove face, a lower build-up layer is formed by using a first welding material containing C: 0.10 to 0.25 wt %, Si: 0.20 to 0.80 wt %, Mn: 1.0 to 2.5 wt %, Ni: 0.4 to 1.0 wt %, Cr: 1.0 to 3.0 wt %, Mo: 0.2 to 1.5 wt %, V: 0.03 to 0.10 wt %, and a remainder composed of Fe and inevitable impurities, and further on this lower build-up layer, an upper build-up layer is formed using a second welding material containing C: 0.10 to 0.25 wt %, Si: 0.20 to 0.80 wt %, Mn: 1.0 to 2.5 wt %, Ni: 0.4 to 1.0 wt %, Cr: 1.0 to 3.0 wt %, Mo: 0.2 to 1.5 wt %, and a remainder consisting of Fe and inevitable impurities.Type: ApplicationFiled: November 24, 2014Publication date: May 26, 2016Applicant: JAPAN CASTING & FORGING CORPORATIONInventors: Yoshihiro Okamura, Yasushi Wakeshima
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Publication number: 20160039130Abstract: To provide a method for manufacturing an optical element, which improves the surface precision of the optical surface as well as reducing the birefringence at a low cost. A method for manufacturing an optical element 1090A having optical surfaces 1091 and 1092 and a non-optical surface 1093A that is adjacent to the optical surface 1092 via a ridge by injection molding includes forming the non-optical surface 1093A with a mold surface. The mold surface includes a sink forming area 1095 as a first area having a first surface roughness, and a high transfer area 1094 as a second area having a second surface roughness different from the first surface roughness. The second area is located outside the first area.Type: ApplicationFiled: January 15, 2014Publication date: February 11, 2016Inventors: Takehiko GOSHIMA, Yoshihiro OKAMURA, Hiroshi UMETSU, Seiji YUASA
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Publication number: 20130239993Abstract: A film-forming apparatus includes a heat generator exposed to a film-forming gas drawn into a chamber to generate film formation species. A film-forming gas supply system supplies the film-forming gas into the chamber. A control unit sets the heat generator in a non-heated state during a cleaning process that discharges a film formation residue from the chamber. A cleaning gas supplying system supplies a cleaning gas including ClF3 into the chamber. A temperature adjustment unit adjusts the chamber to a target temperature from 100° C. or higher to 200° C. or less in the cleaning process. A discharge system discharges a reaction product produced by a reaction between the film formation residue and the cleaning gas from the chamber.Type: ApplicationFiled: November 22, 2011Publication date: September 19, 2013Applicant: ULVAC, INC.Inventors: Yohei Ogawa, Satoru Toyoda, Yoshihiro Okamura
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Publication number: 20090120787Abstract: A barrier film of a semiconductor device is formed. The present invention forms a middle layer having copper as a main component and including a predetermined quantity of diffusible metal with the addition of a reaction gas, by sputtering an alloy target having copper as a main component with the addition of a diffusible metal, while supplying a reaction gas including oxygen or nitrogen. Since contents of the diffusible metal are accurately controlled when heating the middle layer, the barrier film is certainly formed. Additionally, the reaction gas is added to the middle layer so that the reactivity of the diffusible metal becomes high; and accordingly, it is possible to form the barrier film at a heating temperature lower than the conventional art.Type: ApplicationFiled: January 12, 2009Publication date: May 14, 2009Applicant: ULVAC, INC.Inventors: Yoshihiro OKAMURA, Satoru Toyoda, Michio Ishikawa
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Publication number: 20090095617Abstract: The present invention provides a bias sputtering film forming process and film forming apparatus that can form a coating film having a good film thickness distribution in a minute coated surface of a complicated shape, such as contact holes, through-holes and wiring grooves, especially for the sidewall portions thereof. To a bias sputtering film forming apparatus provided with a sputtering cathode 4 and a substrate stage 5 holding a target 6 and a substrate 7 facing to each other, respectively, in a vacuum chamber 1 having a sputtering gas inlet 3 and a vacuum exhaust port 2, a power source 9 of a variable output for the substrate stage 5 and a control system 10 are connected.Type: ApplicationFiled: December 12, 2008Publication date: April 16, 2009Applicant: ULVAC, Inc.Inventors: Myounggoo LEE, Yoshihiro OKAMURA, Kazuyuki TOMIZAWA, Satoru TOYODA, Narishi GONOHE
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Patent number: 6755920Abstract: A low-alloy heat-resistant steel may be used to manufacturing a large element which has uniform superior high temperature properties through a surface layer to a center part. The low-alloy heat-resistant steel comprises carbon in an amount of 0.20 to 0.35% by weight, silicon in an amount of 0.005 to 0.35% by weight, manganese in an amount of 0.05 to 1.0% by weight, nickel in an amount of 0.05 to 0.3% by weight, chromium in an amount of 0.8 to 2.5% by weight, molybdenum in an amount of 0.1 to 1.5% by weight, tungsten in an amount of 0.1 to 2.5% by weight, vanadium in an amount of 0.05 to 0.3% by weight, phosphorus in an amount not greater than 0.012% by weight, sulfur in an amount not greater than 0.005% by weight, copper in an amount not greater than 0.10% by weight, aluminum in an amount not greater than 0.01% by weight, arsenic in an amount not greater than 0.01% by weight, tin in an amount not greater than 0.01% by weight, antimony in an amount not greater than 0.Type: GrantFiled: March 4, 2002Date of Patent: June 29, 2004Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Masatomo Kamada, Akitsugu Fujita, Yoshiyuki Ooba, Yoshihiro Okamura, Makoto Yamaguchi
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Publication number: 20040050687Abstract: The present invention provides a bias sputtering film forming process and film forming apparatus that can form a coating film having a good film thickness distribution in a minute coated surface of a complicated shape, such as contact holes, through-holes and wiring grooves, especially for the sidewall portions thereof.Type: ApplicationFiled: September 10, 2003Publication date: March 18, 2004Applicant: ULVAC, INC.Inventors: Myounggoo Lee, Yoshihiro Okamura, Kazuyuki Tomizawa, Satoru Toyoda, Narishi Gonohe
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Publication number: 20030034101Abstract: A low-alloy heat-resistant steel may be used to manufacturing a large element which has uniform superior high temperature properties through a surface layer to a center part. The low-alloy heat-resistant steel comprises carbon in an amount of 0.20 to 0.35% by weight, silicon in an amount of 0.005 to 0.35% by weight, manganese in an amount of 0.05 to 1.0% by weight, nickel in an amount of 0.05 to 0.3% by weight, chromium in an amount of 0.8 to 2.5% by weight, molybdenum in an amount of 0.1 to 1.5% by weight, tungsten in an amount of 0.1 to 2.5% by weight, vanadium in an amount of 0.05 to 0.3% by weight, phosphorus in an amount not greater than 0.012% by weight, sulfur in an amount not greater than 0.005% by weight, copper in an amount not greater than 0.10% by weight, aluminum in an amount not greater than 0.01% by weight, arsenic in an amount not greater than 0.01% by weight, tin in an amount not greater than 0.01% by weight, antimony in an amount not greater than 0.Type: ApplicationFiled: March 4, 2002Publication date: February 20, 2003Applicant: MITSUBISHI HEAVY INDUSTRIES LTD.Inventors: Masatomo Kamada, Akitsugu Fujita, Yoshiyuki Ooba, Yoshihiro Okamura, Makoto Yamaguchi
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Process for producing extra high tensile steel having excellent stress corrosion cracking resistance
Patent number: 5827379Abstract: An extra high tensile steel having an excellent stress corrosion cracking resistance in sea water and a yield strength of 1080 MPa or more is provided. A slab comprising, in terms of % by weight, 0.04 to 0.09% of C, 0.01 to 0.10% of Si, 0.05 to 0.65% of Mn, 8.0 to 11.0% of Ni, 0.5 to 1.5% of Mo, 0.2 to 1.5% of Cr, 0.02 to 0.20% of V and 0.01 to 0.08% of Al with the balance consisting of iron and unavoidable impurities is heated to a temperature between 1000.degree. C. and 1250.degree. C., hot rolled at a temperature of Ar' point or above, air-cooled, reheated at a rate of 120.degree. C./min or less to a temperature region of from (A.sub.C3 point--40.degree. C.) to (A.sub.C3 point+40.degree. C.), quenched and subsequently tempered at a temperature of the A.sub.C1 point or below.Type: GrantFiled: January 17, 1997Date of Patent: October 27, 1998Assignees: Nippon Steel Corporation, Kawasaki Steel CorporationInventors: Yoshihiro Okamura, Ryota Yamaba, Tomoya Koseki, Ichiro Nakagawa -
Patent number: 5447581Abstract: An extra high tensile steel having an excellent stress corrosion cracking resistance and a yield strength of 1080 MPa or more is provided. A slab comprising, in terms of % by weight, 0.03 to 0.08% of C, 0.01 to 0.10% of Si, 0.05 to 0.65% of Mn, 8.0 to 11.0% of Ni, 0.5 to 1.5% of Mo, 0.2 to 1.5% of Cr, 0.02 to 0.20% of V and 0.01 to 0.08% of Al with the balance consisting of iron and unavoidable impurities is heated to a temperature between 1000.degree. C. and 1250.degree. C., hot-rolled in an austenite recrystallization temperature region with a reduction ratio of 30 to 70%, subsequently rolled in an austenite nonrecrystallization temperature region with a reduction ratio of 20 to 60%, subjected to roll finishing, water-cooled from a temperature of 600.degree. C.Type: GrantFiled: October 28, 1993Date of Patent: September 5, 1995Assignee: Nippon Steel CorporationInventors: Yoshihiro Okamura, Ryota Yamaba
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Patent number: 5061325Abstract: A method of high tension steel having superior weldability and low temperature toughness, comprises the steps of preparing a steel billet having a composition consisting, by weight, of 0.02 to 0.05% C, 0.02 to 0.5% Si, 0.4 to 1.5% Mn, 0.5 to 4.0% Ni, 0.20 to 1.5% Mo, 0.005 to 0.03% Ti, 0.01 to 0.08% Al, not more than 0.0002% B, 0.5 to 2.0% Cu, not more than 0.01% N, and the balance Fe and incidental impurities; heating said steel billet to a temperature of 900.degree. C. to 1000.degree. C.; hot-rolling the heated steel billet first at a rolling reduction of 30 to 70% in a temperature range in which austenite recrystallizes and then at a rolling reduction of 20 to 60% in another temperature range in which austenite does not recrystallize; hardening the hot-rolled billet by water-cooling from a temperature not lower than the Ar.sub.3 transformation point and terminating the cooling at a temperature not higher than 250.degree. C.Type: GrantFiled: March 29, 1990Date of Patent: October 29, 1991Assignee: Nippon Steel CorporationInventors: Yoshihiro Okamura, Seinosuke Yano, Ryota Yamaba, Hidetaka Chiba
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Patent number: 4946516Abstract: A process for producing steel possessing a high level of toughness and strength free of anisotropy and having good resistance to stress corrosion cracking in seawater conditions comprises the steps of:preparing a steel slab comprised of 0.02 to 0.10 wt % C, 0.50 wt % or less Si, 0.4 to 1.5 wt % Mn, 1.0 to 8.0 wt % Ni, 0.1 to 1.5 wt % Mo, 0.8 wt % or less Cr, 0.01 to 0.08 wt % sol. Al, with the balance of Fe and unavoidable impurities;heating the slab to a temperature of from 1000.degree. C. to 1250.degree. C.;hot rolling the steel at a reduction rate of 20 to 60% at an austenite recrystallization temperature region and then at a reduction rate of 30 to 70% at an austenite nonrecrystallization temperature region and finishing the rolling at a temperature of 650.degree. C. or higher;quenching the steel by initiating water cooling at a temperature at or above the A.sub.r3 point thereof and terminating the water cooling at a temperature of 150.degree. C.Type: GrantFiled: March 8, 1989Date of Patent: August 7, 1990Assignee: Nippon Steel CorporationInventors: Seinosuke Yano, Yoshihiro Okamura, Hirohide Muraoka
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Patent number: 4826543Abstract: A process for producing a high toughness, high strength steel having excellent resistance to stress corrosion cracking including the steps of: preparing a steel slab including 0.02 to 0.10 wt % of C, 0.50 wt % or less Si, 0.4 to 1.5 wt % Mn, 1.0 to 7.5 wt % Ni, more than 1.0 wt % up to 1.5 wt % Mo, 0.80 wt % or less Cr, 0.01 to 0.08 wt % sol. Al, and the balance of Fe and unavoidable impurities; heating the steel slab to a temperature of from 1000.degree. C. to 1250.degree. C.; hot rolling the heated steel slab at a finishing nip temperature of from 700.degree. C. to 880.degree. C., at a total reduction rate of 40% or more effected at the finishing nip temperature or lower, and at a finishing temperature of 650.degree. C. or higher, to provide a steel plate; then quenching the steel plate by initiating water cooling at a temperature of the A.sub.r3 point thereof or higher and by terminating the water cooling at a temperature of 150.degree. C.Type: GrantFiled: November 13, 1987Date of Patent: May 2, 1989Assignee: Nippon Steel CorporationInventors: Seinosuke Yano, Yoshihiro Okamura, Katsuo Kaku, Junichi Kobayashi