Patents by Inventor Junichi Hamada

Junichi Hamada 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).

  • Publication number: 20150376732
    Abstract: Ferritic stainless steel sheet which is excellent in ridging resistance which comprises, by mass %, Cr: 10 to 30%, Sn: 0.005 to 1%, C: 0.001 to 0.1%, N: 0.001 to 0.1%, Si: 0.01 to 3.0%, Mn: 0.01 to 3.0%, P: 0.005 to 0.1%, and S: 0.0001 to 0.01% and has a balance of Fe and unavoidable impurities and which has an X-ray diffraction strength in the {100}<012> orientation from a surface layer to t/4 (“t” is sheet thickness) of 2 or more.
    Type: Application
    Filed: February 4, 2014
    Publication date: December 31, 2015
    Applicant: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Junichi HAMADA, Eiichiro ISHIMARU
  • Patent number: 9113065
    Abstract: To provide a network camera and a network camera system in which an image can be securely distributed to a designated distribution recipient. A network camera system 100 connected to a communication network 130 and having a network camera 110 and a plurality of PCs 120, the network camera 110 comprising an image pickup section 111 for picking up the image, a sending and receiving section 115 for distributing the picked up image to the PC 120, an image sending monitoring section 116 for monitoring whether or not the picked up image is distributed to the designated PC 120 among the plurality of PCs 120, and an accumulation memory 119 for accumulating the picked up image when the distribution of the image to the designated PC 120 is interrupted, and the PC 120 comprising an image receiving section 121 for receiving the picked up image distributed thereto.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: August 18, 2015
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Tsuyoshi Ogata, Yasuji Nakamura, Hirotaka Fujimura, Junichi Hamada
  • Publication number: 20150083283
    Abstract: The present invention is directed to a heat-resistant austenitic stainless steel sheet comprising, by mass %, C: 0.03% to 0.06%, N: 0.1% to 0.3%, Si: 1% or less Mn: 3% or less, P: 0.04% or less, S: 0.03% or less, Ni: 5 to 12%, Cr: 15 to 20%, Al: 0.01% to 0.1%, Nb: 0.05% to 0.3%, V: 0.05% to 0.30%, Ti: 0.03% or less, (Nb+V)/(C+N):2 or less and further a balance of Fe and unavoidable impurities, and wherein an amount of precipitates mainly comprised of carbonitrides is 1% or less.
    Type: Application
    Filed: March 28, 2013
    Publication date: March 26, 2015
    Applicant: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Yoshiharu Inoue, Fumio Fudanoki, Junichi Hamada
  • Patent number: 8980018
    Abstract: Ferritic stainless steel sheet for an exhaust part which has little deterioration in strength even if undergoing long term heat history and is low in cost, excellent in heat resistance and workability characterized by containing, characterized by containing, by mass %, C: less than 0.010%, N: 0.020% or less, Si: over 0.1% to 2.0%, Mn: 2.0% or less, Cr: 12.0 to 25.0%, Cu: over 0.9 to 2%, Ti: 0.05 to 0.3%, Nb: 0.001 to 0.1%, Al: 1.0% or less, and B: 0.0003 to 0.003%, having a Cu/(Ti+Nb) of 5 or more, and having a balance of Fe and unavoidable impurities.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: March 17, 2015
    Assignee: Nippon Steel & Sumikin Stainless Steel Corporation
    Inventors: Junichi Hamada, Shinichi Teraoka, Yoshiharu Inoue, Norihiro Kanno
  • Publication number: 20150044085
    Abstract: To provide a ferritic stainless steel sheet which has high scale spalling even at a high temperature around 1000° C. Provided is a ferritic stainless steel sheet having excellent Mn-containing oxide film-forming ability and scale spalling ability, containing, in terms of mass %: C: 0.001 to 0.020%, N: 0.001 to 0.020%, Si: 0.10 to 0.40%, Mn: 0.20 to 1.00%, Cr: 16.0 to 20.0%, Nb: 0.30 to 0.80%, Mo: 1.80 to 2.40%, W: 0.05 to 1.40%, Cu: 1.00 to 2.50%, and B: 0.0003 to 0.0030%, in which the above-mentioned components are contained satisfying the formula (1) below, and the balance is composed of Fe and inevitable impurities. At least one of N, Al, V, Mg, Sn, Co, Zr, Hf, and Ta may be added in a predetermined content range.
    Type: Application
    Filed: March 8, 2013
    Publication date: February 12, 2015
    Applicant: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Norihiro Kanno, Junichi Hamada, Yoshiharu Inoue
  • Publication number: 20150020933
    Abstract: Provided is a heat-resistant cold rolled ferritic stainless steel sheet containing, in terms of mass %, 0.02% or less of C, 0.1% to 1.0% of Si, greater than 0.6% to 1.5% of Mn, 0.01% to 0.05% of P, 0.0001% to 0.0100% of S, 13.0% to 20.0% of Cr, 0.1% to 3.0% of Mo, 0.005% to 0.20% of Ti, 0.3% to 1.0% of Nb, 0.0002% to 0.0050% of B, 0.005% to 0.50% of Al, and 0.02% or less of N, with the balance being Fe and inevitable impurities, in which {111}-oriented grains are present at an area ratio of 20% or greater in a region from a surface layer to t/4 (t is a sheet thickness), {111}-oriented grains are present at an area ratio of 40% or greater in a region from t/4 to t/2, and {011}-oriented grains are present at an area ratio of 15% or less in the entire region in a thickness direction.
    Type: Application
    Filed: March 26, 2013
    Publication date: January 22, 2015
    Applicant: Nippon Steel & Sumikin Stainless Steel Corporation
    Inventors: Junichi Hamada, Yuji Koyama, Yoshiharu Inoue, Tadashi Komori, Fumio Fudanoki, Toshio Tanoue, Naoto Ono
  • Publication number: 20140294660
    Abstract: This hot-rolled ferritic stainless steel sheet contains, in terms of % by mass: 0.0150% or less of C, 0.01% to 2.00% of Si, 0.01% to 2.00% of Mn, less than 0.040% of P, 0.010% or less of S, 10.0% to 30.0% of Cr, 0.001% to 0.100% of Al, and 0.0200% or less of N, with a balance being Fe and unavoidable impurities, wherein in a cross section in a range of ¼ to ¾ of a sheet thickness, a length L of all crystal grain boundaries having orientation differences of 1° or more to less than 180° and a length La of subgrain boundaries having orientation differences of 1° or more to less than 15° satisfy a relation of La/L?0.20.
    Type: Application
    Filed: December 6, 2012
    Publication date: October 2, 2014
    Inventors: Ken Kimura, Junichi Hamada, Jun Takahashi, Yuuji Koyama, Shigeyuki Gotoh
  • Publication number: 20140023550
    Abstract: The present invention provides ferritic stainless steel sheet which is excellent in heat resistance at 950° C. and workability at ordinary temperature, that is, ferritic stainless steel sheet excellent in heat resistance and workability which is characterized by containing, by mass %, C: 0.02% or less, N: 0.02% or less, Si: over 0.1 to 1.0%, Mn: 0.5% or less, P: 0.020 to 0.10%, Cr: 13.0 to 20.0%, Nb: 0.5 to 1.0%, Cu: 1.0 to 3.0%, Mo: 1.5 to 3.5%, W: 2.0% or less, B: 0.0001 to 0.0010%, and Al: 0.01 to 1.0% and having a balance of Fe and unavoidable impurities, where Mo+W is made 2.0 to 3.5%.
    Type: Application
    Filed: March 28, 2012
    Publication date: January 23, 2014
    Inventors: Junichi Hamada, Norihiro Kanno, Yoshiharu Inoue
  • Patent number: 8628631
    Abstract: The present invention provides a ferritic stainless steel casting and a sheet thereof excellent in deep drawability, punch stretchability and ridging resistance and a method for producing the casting and the sheet. In the present invention, a chemical composition is controlled so that the amounts of C, N, Si, Mn, P and Ti may be reduced to the utmost for securing high workability and, on the basis of the chemical composition, the roping and ridging of a steel sheet product is reduced by adding Mg, thus dispersing Mg containing oxides that accelerate the formation of nuclei for solidification and, resultantly, suppressing the development of coarse columnar crystals in a casting. The present invention is characterized in that the average composition of the Mg containing oxides dispersing in a casting satisfies the following expressions <2> and <3>, 17.4(Al2O3)+3.9(MgO)+0.3(MgAl2O4)+18.7(CaO)?500??<2>, (Al2O3)+(MgO)+(MgAl2O4)+(CaO)?95??<3>.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: January 14, 2014
    Assignee: Nippon Steel & Sumikin Stainless Steel Corporation
    Inventors: Akihiko Takahashi, Junichi Hamada, Ken Kimura, Takashi Morohoshi, Yoshihito Yamada, Toyohiko Kakihara, Satoshi Hashimoto
  • Publication number: 20130306204
    Abstract: This hot-rolled ferritic stainless steel sheet has a steel composition containing, in terms of % by mass: 0.02% or less of C; 0.02% or less of N; 0.1% to 1.5% of Si; 1.5% or less of Mn; 0.035% or less of P; 0.010% or less of S; 1.5% or less of Ni; 10% to 20% of Cr; 1.0% to 3.0% of Cu; 0.08% to 0.30% of Ti; and 0.3% or less of Al, with the balance being Fe and unavoidable impurities, and the hot-rolled ferritic stainless steel sheet has a Vickers hardness of less than 235 Hv.
    Type: Application
    Filed: February 8, 2012
    Publication date: November 21, 2013
    Applicant: Nippon Steel & Sumikin Stainless Steel Corporation
    Inventors: Shinichi Teraoka, Masaaki Kobayashi, Yuuji Koyama, Junichi Hamada, Norihiro Kanno, Yoshiharu Inoue, Ken Kimura, Jun Takahashi, Shigeyuki Gotoh
  • Publication number: 20130149187
    Abstract: A heat-resistant ferritic stainless steel sheet having excellent oxidation resistance while being low in cost and optimal for use in exhaust system components, wherein mass % falls within the following ranges: C: 0.015% or less, N: 0.020% or less, P: 0.04% or less, S: 0.001% or less, Si: 0.3-1.5% or less, Mn: 0.3-0.7% or less, Cr: 11.0-17.0%, Cu: 0.8-1.5%, Ni: 0.05-1.0%, V: 0.5% or less, Al: over 0.01 up to 0.1%, Ti: 10(C+N) to 0.3%. Also, the element content of the elements in the ferritic stainless steel sheet having excellent oxidation and thermal resistance has been mutually adjusted in a manner such that the value of ? defined in formula (1) is 35 or less. ?=23[% Ni]+9[% Cu]+7[% Mn]?11.5[% Cr]?11.
    Type: Application
    Filed: September 15, 2011
    Publication date: June 13, 2013
    Applicant: NIPPON STEEL & SUMIKIN STAINLESS STEEL SHEET CORPORATION
    Inventors: Yoshiharu Inoue, Junichi Hamada, Norihiro Kanno, Shinichi Teraoka
  • Publication number: 20130008573
    Abstract: Ferritic stainless steel sheet for an exhaust part which has little deterioration in strength even if undergoing long term heat history and is low in cost, excellent in heat resistance and workability characterized by containing, characterized by containing, by mass %, C: less than 0.010%, N: 0.020% or less, Si: over 0.1% to 2.0%, Mn: 2.0% or less, Cr: 12.0 to 25.0%, Cu: over 0.9 to 2%, Ti: 0.05 to 0.3%, Nb: 0.001 to 0.1%, Al: 1.0% or less, and B: 0.0003 to 0.003%, having a Cu/(Ti+Nb) of 5 or more, and having a balance of Fe and unavoidable impurities.
    Type: Application
    Filed: March 25, 2011
    Publication date: January 10, 2013
    Inventors: Junichi Hamada, Shinichi Teraoka, Yoshiharu Inoue, Norihiro Kanno
  • Publication number: 20130004360
    Abstract: Ferritic stainless steel sheet which has a high oxidation resistance and scale spallation resistance even at a high temperature near 1000° C., characterized by containing C: 0.020% or less, N: 0.020% or less, Si: over 0.10 to 0.35%, Mn: 0.10 to 0.60%, Cr: 16.5 to 20.0%, Nb: 0.30 to 0.80%, Mo: over 2.50 to 3.50%, and Cu: 1.00 to 2.50%, having an amount of increase of oxidation after a continuous oxidation test in the air at 1000° C. for 200 hours of 4.0 mg/cm2 or less, and having an amount of scale spallation of 1.0 mg/cm2 or less.
    Type: Application
    Filed: March 11, 2011
    Publication date: January 3, 2013
    Inventors: Norihiro Kanno, Yoshiharu Inoue, Junichi Hamada
  • Patent number: 8320807
    Abstract: An image forming apparatus includes: a first rotary body; a second rotary body provided to face the first rotary body, wherein the first rotary body and the second rotary body form a nip portion by coming in contact with each other to rotate, at which a sheet bearing a toner image is conveyed while being heated and pressed, thereby fixing the toner image onto the sheet; a first nozzle which blows air to a first air blowing position established on a circumferential surface of the first rotary body and on a side of an outlet of the nip portion; and a second nozzle which blows air to a second air blowing position established on a circumferential surface of the second rotary body and established downstream of the first air blowing position in a traveling direction of the sheet.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: November 27, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Masahiro Onodera, Junichi Hamada, Hiroshi Funabiki, Hidetoshi Katayanagi
  • Patent number: 8303733
    Abstract: This stainless steel sheet includes, in terms of mass %, C: 0.001 to 0.1%, N: 0.01 to 0.15%, Si: 0.01 to 2%, Mn: 0.1 to 10%, P: 0.05% or less, S: 0.01% or less, Ni: 0.5 to 5%, Cr: 10 to 25%, and Cu: 0.5 to 5%, with a remainder being Fe and unavoidable impurities, and contains a ferrite phase as a main phase and 10% or more of an austenite phase, wherein a work-hardening rate in a strain range of up to 30% is 1000 MPa or more which is measured by a static tensile testing and a difference between static and dynamic stresses which occur when 10% of deformation is caused is 150 MPa or more. This method for producing a stainless steel includes annealing a cold-rolled steel sheet under conditions where a holding temperature is set to be in a range of 950 to 1150° C. and a cooling rate until 400° C. is set to be in a range of 3° C./sec or higher.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: November 6, 2012
    Assignee: Nippon Steel & Sumikin Stainless Steel Corporation
    Inventors: Junichi Hamada, Haruhiko Kajimura, Eiichiro Ishimaru
  • Patent number: 8293038
    Abstract: The present invention provides a ferritic stainless steel casting and a sheet thereof excellent in deep drawability, punch stretchability and ridging resistance and a method for producing the casting and the sheet. In the present invention, a chemical composition is controlled so that the amounts of C, N, Si, Mn, P and Ti may be reduced to the utmost for securing high workability and, on the basis of the chemical composition, the roping and ridging of a steel sheet product is reduced by adding Mg, thus dispersing Mg containing oxides that accelerate the formation of nuclei for solidification and, resultantly, suppressing the development of coarse columnar crystals in a casting. The present invention is characterized in that the average composition of the Mg containing oxides dispersing in a casting satisfies the following expressions <2> and <3>, 17.4(Al2O3)+3.9(MgO)+0.3(MgAl2O4)+18.7(CaO)?500??<2>, (Al2O3)+(MgO)+(MgAl2O4)+(CaO)?95??<3>.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: October 23, 2012
    Assignee: Nippon Steel & Sumikin Stainless Steel Corporation
    Inventors: Akihiko Takahashi, Junichi Hamada, Ken Kimura, Takashi Morohoshi, Yoshihito Yamada, Toyohiko Kakihara, Satoshi Hashimoto
  • Patent number: 8129035
    Abstract: The invention provides structural component for an automobile, two-wheeled vehicle or railcar excellent in impact-absorption property, shape fixability and flange cuttability, and method for producing the same, which structural component has a hat-like shape including vertical walls and flanges, wherein distal ends of the flanges contain 20 vol % or greater of austenite phase and have a cross-section hardness expressed as Vickers harness of 150˜350, and a center regions of the vertical walls have, in a common cross-section with the flanges, a content of deformation-induced martensite phase exceeding that of the distal ends of the flanges by 10 vol % or greater and a cross-section hardness expressed as Vickers hardness that exceeds that of the distal ends of the flanges by 50 or greater.
    Type: Grant
    Filed: April 1, 2008
    Date of Patent: March 6, 2012
    Assignee: Nippon Steel & Sumikin Stainless Steel Corporation
    Inventors: Ken Kimura, Junichi Hamada, Naoto Ono, Haruhiko Kajimura, Toshio Tanoue
  • Publication number: 20120014830
    Abstract: Ferritic stainless steel excellent in heat resistance and workability which contains, by mass %, C: 0.02% or less, N: 0.02% or less, Si: 2% or less, Mn: 2% or less, Cr: 10 to 20%, Cu: 0.4 to 3%, Ti: 0.01 to 0.5%, and B: 0.0002 to 0.0030% and has a balance of Fe and unavoidable impurities.
    Type: Application
    Filed: March 23, 2010
    Publication date: January 19, 2012
    Inventors: Junichi Hamada, Norihiro Kanno, Akihiko Takahashi, Yoshiharu Inoue, Shinichi Teraoka
  • Patent number: 8062584
    Abstract: The present invention provides, as a material superior in heat resistance in a hot environment where the maximum temperature of the exhaust gas becomes 750 to 900° C., ferritic stainless steel sheet superior in heat resistance in a broad temperature region of 750 to 900° C. with long term stability by a smaller amount of addition of Mo than SUS444 containing about 2% of expensive Mo, that is, ferritic stainless steel sheet superior in heat resistance characterized by containing, by mass %, C: 0.01% or less, N: 0.02% or less, Si: 0.05 to 1%, Mn: 0.1 to 2%, Cr: 10 to 30%, Mo: 0.1 to 1%, Cu: 1 to 2%, Nb: 0.2 to 0.7%, Ti: 0.01 to 0.3%, and B: 0.0002 to 0.0050%, having a balance of Fe and unavoidable impurities, and having a 0.2% yield strength at 750° C. of 70 MPa or more.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: November 22, 2011
    Assignee: Nippon Steel & Sumikin Stainless Steel Corporation
    Inventors: Junichi Hamada, Haruhiko Kajimura, Toshio Tanoue, Fumio Fudanoki, Yoshiharu Inoue
  • Patent number: 8048239
    Abstract: The present invention provides a ferritic stainless steel sheet superior in shapeability containing, by wt %, C: 0.001 to 0.010%, Si: 0.01 to 1.0%, Mn: 0.01 to 1.0%, P: 0.01 to 0.04%, Cr: 10 to 20%, N: 0.001 to 0.020%, Nb: 0.3 to 1.0%, and Mo: 0.5 to 2.0%, wherein the total precipitates are, by wt %, 0.05 to 0.60%. A method of production of a ferritic stainless steel sheet superior in shapeability comprising producing a cold rolling material in the production process so that the Nb-based precipitates become, by vol %, 0.15% to 0.6% and have a diameter of 0.1 ?m to 1 ?m and/or so that the recrystallized grain size becomes 1 ?m to 40 ?m and the recrystallization rate becomes 10 to 90%, then cold rolling and annealing it at 1010 to 1080° C.
    Type: Grant
    Filed: August 26, 2008
    Date of Patent: November 1, 2011
    Assignee: Nippon Steel & Sumikin Stainless Steel Corporation
    Inventors: Junichi Hamada, Naoto Ono, Yoshiharu Inoue, Ken Kimura