Patents by Inventor Takayuki Segawa
Takayuki Segawa 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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Patent number: 11389869Abstract: A cylinder for a molding machine comprising a HIP-sintered lining layer on an inner surface of a cylindrical steel body, the lining layer comprising 38-70% by volume of tungsten carbide particles having a median diameter d50 of 1-7 ?m and a matrix composed of an Ni-based alloy, and the maximum length of the matrix in an arbitrary cross section being 12 ?m or less.Type: GrantFiled: August 31, 2018Date of Patent: July 19, 2022Assignee: HITACHI METALS, LTD.Inventors: Takayuki Segawa, Kiyoshi Furushima
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Publication number: 20200222980Abstract: A cylinder for a molding machine comprising a HIP-sintered lining layer on an inner surface of a cylindrical steel body, the lining layer comprising 38-70% by volume of tungsten carbide particles having a median diameter d50 of 1-7 ?m and a matrix composed of an Ni-based alloy, and the maximum length of the matrix in an arbitrary cross section being 12 ?m or less.Type: ApplicationFiled: August 31, 2018Publication date: July 16, 2020Applicant: HIACHI METALS, LTD.Inventors: Takayuki SEGAWA, Kiyoshi FURUSHIMA
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Patent number: 9724740Abstract: A centrifugally cast composite roll comprising an outer layer formed by a centrifugal casting method, and an inner layer made of ductile cast iron and integrally fused to the outer layer, the outer layer being made of an Fe-based alloy comprising by mass 1.3-3.7% of C, 0.3-3% of Si, 0.1-3% of Mn, 1-7% of Cr, 1-8% of Mo, at least one of 2.5-7% of V, 0.1-3% of Nb and 0.1-5% of W (V is indispensable), and 0.01-0.2% of B and/or 0.05-0.3% of S, the balance being substantially Fe and inevitable impurities, the outer layer having a structure containing no graphite; the inner layer comprising a core portion fused to the outer layer, and a drive-side shaft portion and a free-side shaft portion integrally extending from both ends of the core portion; the total amount of Cr, Mo, V, Nb and W being 0.35-2% by mass in an end portion of the drive-side shaft portion and 0.15-1.8% by mass in an end portion of the free-side shaft portion, the former being larger than the latter by 0.2% or more by mass.Type: GrantFiled: August 28, 2014Date of Patent: August 8, 2017Assignee: HITACHI METALS, LTD.Inventors: Nozomu Oda, Takayuki Segawa, Yasunori Nozaki, Toshiyuki Hattori
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Publication number: 20160193637Abstract: A centrifugally cast composite roll comprising an outer layer formed by a centrifugal casting method, and an inner layer made of ductile cast iron and integrally fused to the outer layer, the outer layer being made of an Fe-based alloy comprising by mass 1.3-3.7% of C, 0.3-3% of Si, 0.1-3% of Mn, 1-7% of Cr, 1-8% of Mo, at least one of 2.5-7% of V, 0.1-3% of Nb and 0.1-5% of W (V is indispensable), and 0.01-0.2% of B and/or 0.05-0.3% of S, the balance being substantially Fe and inevitable impurities, the outer layer having a structure containing no graphite; the inner layer comprising a core portion fused to the outer layer, and a drive-side shaft portion and a free-side shaft portion integrally extending from both ends of the core portion; the total amount of Cr, Mo, V, Nb and W being 0.35-2% by mass in an end portion of the drive-side shaft portion and 0.15-1.8% by mass in an end portion of the free-side shaft portion, the former being larger than the latter by 0.2% or more by mass.Type: ApplicationFiled: August 28, 2014Publication date: July 7, 2016Applicant: HITACHI METALS, LTD.Inventors: Nozomu ODA, Takayuki SEGAWA, Yasunori NOZAKI, Toshiyuki HATTORI
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Patent number: 9358758Abstract: A centrifugally cast hot-rolling composite roll comprising (a) an outer layer made of cast iron having a chemical composition comprising by mass 2.5-3.5% of C, 1.3-2.4% of Si, 0.2-1.5% of Mn, 3.5-5.0% of Ni, 0.8-1.5% of Cr, 2.5-5.0% of Mo, 1.8-4.0% of V, and 0.2-1.5% of Nb, the balance being Fe and inevitable impurities, a mass ratio of Nb/V being 0.1-0.7, and a mass ratio of Mo/V being 0.7-2.5, and meeting the condition of 2.5?V+1.2Nb?5.5, and having a structure comprising 0.3-10% by area of a graphite phase; (b) a shaft portion made of ductile cast iron in which the area ratio of ferrite is 35% or less; and (c) an intermediate cast iron layer.Type: GrantFiled: May 2, 2014Date of Patent: June 7, 2016Assignee: HITACHI METALS, LTD.Inventors: Nozomu Oda, Takayuki Segawa, Yasunori Nozaki
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Patent number: 9221232Abstract: A centrifugally cast composite roll comprising an outer layer made of cast iron having a chemical composition comprising, by mass, 2.7-3.5% of C, 1.5-2.5% of Si, 0.4-1.0% of Mn, 3.7-5.1% of Ni, 0.8-2.2% of Cr, 1.5-4.5% of Mo, 2.0-4.5% of V, and 0.5-2.0% of Nb, the balance being Fe and inevitable impurities, a mass ratio of Nb/V being 0.18-0.65, and a mass ratio of Mo/V being 0.7-2.5, and a structure comprising, by area, 15-45% of a cementite phase and 1-10% of a graphite phase, and an inner layer made of cast iron having excellent mechanical strength and metallurgically bonded to the outer layer; a usable region of the outer layer as deep as 10 mm or more from the surface containing substantially no speck-like-segregated dendrites of bainite and/or martensite having diameters of 1.5 mm or more.Type: GrantFiled: November 21, 2012Date of Patent: December 29, 2015Assignee: HITACHI METALS, LTD.Inventors: Nozomu Oda, Takayuki Segawa, Yasunori Nozaki
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Publication number: 20150336353Abstract: A centrifugally cast hot-rolling composite roll comprising (a) an outer layer made of cast iron having a chemical composition comprising by mass 2.5-3.5% of C, 1.3-2.4% of Si, 0.2-1.5% of Mn, 3.5-5.0% of Ni, 0.8-1.5% of Cr, 2.5-5.0% of Mo, 1.8-4.0% of V, and 0.2-1.5% of Nb, the balance being Fe and inevitable impurities, a mass ratio of Nb/V being 0.1-0.7, and a mass ratio of Mo/V being 0.7-2.5, and meeting the condition of 2.5?V+1.2Nb?5.5, and having a structure comprising 0.3-10% by area of a graphite phase; (b) a shaft portion made of ductile cast iron in which the area ratio of ferrite is 35% or less; and (c) an intermediate cast iron layer.Type: ApplicationFiled: May 2, 2014Publication date: November 26, 2015Applicant: HITACHI METALS, LTD.Inventors: Nozomu ODA, Takayuki SEGAWA, Yasunori NOZAKI
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Patent number: 9044807Abstract: A centrifugally cast composite roll comprising an outer layer formed by a centrifugal casting method, and an inner layer made of ductile cast iron and integrally fused to the outer layer; the outer layer being made of an Fe-based alloy having a chemical composition comprising by mass at least 0.8-3.0% of Cr, 1.5-6.0% of Mo, and 1.8-5.5% of V, and a metal structure in which the area ratio of graphite is 0.3-10%; the inner layer comprising a roll body portion fused to the outer layer, and shaft portions integrally extending from both ends of the roll body portion; and the total amount of Cr, Mo and V being 0.15-2.0% by mass in end portions of both shaft portions, and the difference in the total amount of Cr, Mo and V between one shaft portion and the other shaft portion being 0.2% or more by mass.Type: GrantFiled: March 28, 2013Date of Patent: June 2, 2015Assignee: HITACHI METALS, LTD.Inventors: Nozomu Oda, Takayuki Segawa, Yasunori Nozaki, Toshiyuki Hattori
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Publication number: 20140377587Abstract: A centrifugally cast composite roll comprising an outer layer formed by a centrifugal casting method, and an inner layer made of ductile cast iron and integrally fused to the outer layer; the outer layer being made of an Fe-based alloy having a chemical composition comprising by mass at least 0.8-3.0% of Cr, 1.5-6.0% of Mo, and 1.8-5.5% of V, and a metal structure in which the area ratio of graphite is 0.3-10%; the inner layer comprising a roll body portion fused to the outer layer, and shaft portions integrally extending from both ends of the roll body portion; and the total amount of Cr, Mo and V being 0.15-2.0% by mass in end portions of both shaft portions, and the difference in the total amount of Cr, Mo and V between one shaft portion and the other shaft portion being 0.2% or more by mass.Type: ApplicationFiled: March 28, 2013Publication date: December 25, 2014Applicant: HITACHI METALS, LTD.Inventors: Nozomu Oda, Takayuki Segawa, Yasunori Nozaki, Toshiyuki Hattori
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Publication number: 20140248511Abstract: A centrifugally cast composite roll comprising an outer layer made of cast iron having a chemical composition comprising, by mass, 2.7-3.5% of C, 1.5-2.5% of Si, 0.4-1.0% of Mn, 3.7-5.1% of Ni, 0.8-2.2% of Cr, 1.5-4.5% of Mo, 2.0-4.5% of V, and 0.5-2.0% of Nb, the balance being Fe and inevitable impurities, a mass ratio of Nb/V being 0.18-0.65, and a mass ratio of Mo/V being 0.7-2.5, and a structure comprising, by area, 15-45% of a cementite phase and 1-10% of a graphite phase, and an inner layer made of cast iron having excellent mechanical strength and metallurgically bonded to the outer layer; a usable region of the outer layer as deep as 10 mm or more from the surface containing substantially no speck-like-segregated dendrites of bainite and/or martensite having diameters of 1.5 mm or more.Type: ApplicationFiled: November 21, 2012Publication date: September 4, 2014Applicant: HITACHI METALS, LTD.Inventors: Nozomu Oda, Takayuki Segawa, Yasunori Nozaki
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Publication number: 20090284474Abstract: A display apparatus operable to flexibly perform display control to a plurality of images is provided, when the plurality of images are displayed on the display apparatus, and each image is selected either as a touch operation target or as a remote control target alternatively.Type: ApplicationFiled: October 23, 2006Publication date: November 19, 2009Applicant: PANASONIC CORPORATIONInventors: Norio Komaki, Takayuki Segawa, Yoshitaka Ootsuka, Satoru Tanaka
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Publication number: 20070226490Abstract: A communication system for allowing communications as of Internet and the like to be universally used without restricting a second user to use communication and further without requiring any significant capital investment. According to this communication system, when a terminal (104) becomes able to communicate with a network usage terminal (101) and is about to use the Internet via the network usage terminal (101), it transmits the authentication information of its user (B), and the network usage terminal (101) then transmits the authentication information of its owner (A) and the received authentication information of the user (B) to an authentication server (105). If a result of authentication is OK, the network usage terminal (101) relays the communication of the terminal (104) to the Internet (103), thereby permitting the terminal (104) to use the Internet.Type: ApplicationFiled: May 13, 2005Publication date: September 27, 2007Inventors: So Odawara, Takao Nishiyama, Takayuki Segawa, Manabu Nakamura, Masahiro Matsunaga, Yuji Hashimoto, Mikio Mizutani