Patents by Inventor Hideaki Kawata
Hideaki Kawata 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: 20200391288Abstract: A sintered valve guide having a metallic structure that has a matrix composed of a martensite phase dispersed in a pearlite single phase structure or a mixed structure of ferrite and pearlite, and a pore dispersed within the matrix, wherein the martensite phase exists in a proportion such that an area ratio of the martensite phase in a structure cross-section is within a range from 1 to 10% of the matrix is provided. A method for producing a sintered valve guide is provided, the method includes preparing a mixed powder by adding a copper-phosphorous alloy powder, a nickel powder and a graphite powder to an iron powder, molding the mixed powder into a molded body having a density of 6.8 to 7.2 Mg/m3, and sintering the obtained molded body at a temperature of 950 to 1,200° C.Type: ApplicationFiled: February 22, 2019Publication date: December 17, 2020Inventors: Daisuke FUKAE, Hideaki KAWATA
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Patent number: 10150162Abstract: An iron-based sintered alloy for sliding member, in which seizure resistance is improved, and a production method therefor, are provided. The iron-based sintered alloy for sliding member consists of, by mass %, 10 to 30% of Cu, 0.2 to 2.0 % of C, 0.03 to 0.9 % of Mn, 0.36 to 3.65% of S, and the balance of Fe and inevitable impurities in the overall composition. The iron-based sintered alloy for sliding member exhibits a metallic structure in which copper phases and pores are dispersed in the matrix that includes mainly a martensite structure and sulfide particles are dispersed in the matrix and the copper phases. The sulfide particles are dispersed at 1 to 30 vol. % with respect to the matrix.Type: GrantFiled: March 26, 2014Date of Patent: December 11, 2018Assignee: HITACHI CHEMICAL COMPANY, LTD.Inventors: Hidekazu Tokushima, Hideaki Kawata
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Patent number: 10131972Abstract: An iron-based sintered sliding member is provided in which solid lubricating agent is dispersed uniformly inside of powder particles in addition to inside of pores and particle interfaces of the powder, the agent is strongly fixed, and sliding properties and mechanical strength are superior. The iron-based sintered sliding member contains S: 0.2 to 3.24 mass %, Cu: 3 to 10 mass %, remainder: Fe and inevitable impurities, as an overall composition; the metallic structure includes a base in which sulfide particles are dispersed, and pores; the base is a ferrite phase or a ferrite phase in which copper phase is dispersed; and the sulfide particles are dispersed at a ratio of 0.8 to 15.0 vol % versus the base.Type: GrantFiled: March 7, 2014Date of Patent: November 20, 2018Assignee: HITACHI CHEMICAL COMPANY, LTD.Inventors: Daisuke Fukae, Hideaki Kawata
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Patent number: 10094009Abstract: A sintered alloy having superior heat resistance and superior wear resistance and also having corrosion resistance against salt damage that may occur in cold-weather regions, and a production method therefor, are provided. The sintered alloy consists of, by mass %, 32.4 to 48.4% of Cr, 2.9 to 10.0% of Mo, 0.9 to 2.9% of Si, 0.3 to 1.8% of P, 0.7 to 3.9% of C, and the balance of Fe and inevitable impurities, and it has a density ratio of not less than 90% and includes carbides that are dispersed in a matrix of a metallic structure thereof.Type: GrantFiled: November 30, 2015Date of Patent: October 9, 2018Assignee: HITACHI CHEMICAL COMPANY, LTD.Inventors: Daisuke Fukae, Hideaki Kawata
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Patent number: 10006111Abstract: A sintered alloy includes, in percentage by mass, Cr: 11.75 to 39.98, Ni: 5.58 to 24.98, Si: 0.16 to 2.54, P: 0.1 to 1.5, C: 0.58 to 3.62 and the balance of Fe plus unavoidable impurities; a phase A containing precipitated metallic carbides with an average particle diameter of 10 to 50 ?m; and a phase B containing precipitated metallic carbides with an average particle diameter of 10 ?m or less, wherein the phase A is randomly dispersed in the phase B and the average particle diameter DA of the precipitated metallic carbides in the phase A is larger than the average particle diameter DB of the precipitated metallic carbides of the phase B.Type: GrantFiled: December 1, 2016Date of Patent: June 26, 2018Assignee: HITACHI POWDERED METALS CO., LTD.Inventors: Daisuke Fukae, Hideaki Kawata
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Patent number: 9982563Abstract: A sintered alloy includes, in percentage by mass, Cr: 10.37 to 39.73, Ni: 5.10 to 24.89, Si: 0.14 to 2.52, Cu: 1.0 to 10.0, P: 0.1 to 1.5, C: 0.18 to 3.20 and the balance of Fe plus unavoidable impurities; a phase A containing precipitated metallic carbide with an average particle diameter of 10 to 50 ?m; and a phase B containing precipitated metallic carbide with an average particle diameter of 10 ?m or less, wherein the phase A is randomly dispersed in the phase B and the average particle diameter DA of the precipitated metallic carbide in the phase A is larger than the average particle diameter DB of the precipitated metallic carbide of the phase B.Type: GrantFiled: December 4, 2017Date of Patent: May 29, 2018Assignee: HITACHI CHEMICAL COMPANY, LTD.Inventors: Daisuke Fukae, Hideaki Kawata
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Patent number: 9982562Abstract: A sintered alloy includes, in percentage by mass, Cr: 10.37 to 39.73, Ni: 5.10 to 24.89, Si: 0.14 to 2.52, Cu: 1.0 to 10.0, P: 0.1 to 1.5, C: 0.18 to 3.20 and the balance of Fe plus unavoidable impurities; a phase A containing precipitated metallic carbide with an average particle diameter of 10 to 50 ?m; and a phase B containing precipitated metallic carbide with an average particle diameter of 10 ?m or less, wherein the phase A is randomly dispersed in the phase B and the average particle diameter DA of the precipitated metallic carbide in the phase A is larger than the average particle diameter DB of the precipitated metallic carbide of the phase B.Type: GrantFiled: March 3, 2014Date of Patent: May 29, 2018Assignee: HITACHI CHEMICAL COMPANY, LTD.Inventors: Daisuke Fukae, Hideaki Kawata
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Publication number: 20180094539Abstract: A sintered alloy includes, in percentage by mass, Cr: 10.37 to 39.73, Ni: 5.10 to 24.89, Si: 0.14 to 2.52, Cu: 1.0 to 10.0, P: 0.1 to 1.5, C: 0.18 to 3.20 and the balance of Fe plus unavoidable impurities; a phase A containing precipitated metallic carbide with an average particle diameter of 10 to 50 ?m; and a phase B containing precipitated metallic carbide with an average particle diameter of 10 ?m or less, wherein the phase A is randomly dispersed in the phase B and the average particle diameter DA of the precipitated metallic carbide in the phase A is larger than the average particle diameter DB of the precipitated metallic carbide of the phase B.Type: ApplicationFiled: December 4, 2017Publication date: April 5, 2018Applicant: HITACHI CHEMICAL COMPANY, LTD.Inventors: Daisuke Fukae, Hideaki Kawata
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Patent number: 9744591Abstract: An iron-based sintered sliding member is provided in which solid lubricating agent is dispersed uniformly inside of powder particles in addition to inside of pores and particle interfaces of the powder, the agent is strongly fixed, and sliding properties and mechanical strength are superior. The iron-based sintered sliding member contains S: 3.24 to 8.10 mass %, remainder: Fe and inevitable impurities, as an overall composition; the metallic structure includes a ferrite base in which sulfide particles are dispersed, and pores; and the sulfide particles are dispersed at a ratio of 15 to 30 vol % versus the base.Type: GrantFiled: March 18, 2014Date of Patent: August 29, 2017Assignee: HITACHI CHEMICAL COMPANY, LTD.Inventors: Daisuke Fukae, Hideaki Kawata
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Patent number: 9637811Abstract: An iron-based sintered sliding member consists of, by mass %, 0.1 to 10% of Cu, 0.2 to 2.0% of C, 0.03 to 0.9% of Mn, 0.52 to 6.54% of S, and the balance of Fe and inevitable impurities. The iron-based sintered sliding member satisfies the following First Formula in which [S %] represents mass % of S and [Mn %] represents mass % of Mn in the overall composition. The iron-based sintered sliding member exhibits a metallic structure in which pores and sulfide particles are dispersed in the matrix that includes a martensite structure at not less than 50% by area ratio in cross section. The sulfide particles are dispersed at 3 to 30 vol. % with respect to the matrix. [S %]=0.6×[Mn %]+0.5 to 6.Type: GrantFiled: October 1, 2012Date of Patent: May 2, 2017Assignee: HITACHI POWDERED METALS CO., LTD.Inventors: Daisuke Fukae, Hideaki Kawata, Hidekazu Tokushima
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Patent number: 9631669Abstract: The oil-impregnated sintered bearing made of iron-copper sintered alloy consisting of 10-59% of Cu, 0.5-3% of Sn, and balance of Fe and impurities, includes pores in the iron-copper sintered alloy matrix of not less than 800 per mm2, has pores exposed at 20-50% by area ratio at the inner circumferential surface with diameters greater than 100 ?m, not more than 0.5%, respectable to the total pores number. The pores number with diameters greater than 80 ?m and not greater than 100 ?m, not more than 0.1%, respectable to the total pores number with diameters greater than 60 ?m and not greater than 80 ?m is 0.5-1.5%, respectable to the total pores number, with diameters greater than 40 ?m and not greater than 60 ?m is 0.8-3% respectable to the total pores number, and the remainder pores are with diameters less than 40 ?m.Type: GrantFiled: April 22, 2014Date of Patent: April 25, 2017Assignee: HITACHI CHEMICAL COMPANY, LTD.Inventors: Naoki Nishizawa, Hideaki Kawata, Hidekazu Tokushima
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Publication number: 20170081747Abstract: A sintered alloy includes, in percentage by mass, Cr: 11.75 to 39.98, Ni: 5.58 to 24.98, Si: 0.16 to 2.54, P: 0.1 to 1.5, C: 0.58 to 3.62 and the balance of Fe plus unavoidable impurities; a phase A containing precipitated metallic carbides with an average particle diameter of 10 to 50 ?m; and a phase B containing precipitated metallic carbides with an average particle diameter of 10 ?m or less, wherein the phase A is randomly dispersed in the phase B and the average particle diameter DA of the precipitated metallic carbides in the phase A is larger than the average particle diameter DB of the precipitated metallic carbides of the phase B.Type: ApplicationFiled: December 1, 2016Publication date: March 23, 2017Applicant: HITACHI POWDERED METALS CO., LTD.Inventors: Daisuke FUKAE, Hideaki KAWATA
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Publication number: 20160289804Abstract: A sintered alloy having superior heat resistance and superior wear resistance and also having corrosion resistance against salt damage that may occur in cold-weather regions, and a production method therefor, are provided. The sintered alloy consists of, by mass %, 32.4 to 48.4% of Cr, 2.9 to 10.0% of Mo, 0.9 to 2.9% of Si, 0.3 to 1.8% of P, 0.7 to 3.9% of C, and the balance of Fe and inevitable impurities, and it has a density ratio of not less than 90% and includes carbides that are dispersed in a matrix of a metallic structure thereof.Type: ApplicationFiled: November 30, 2015Publication date: October 6, 2016Applicant: HITACHI CHEMICAL COMPANY, LTD.Inventors: Daisuke FUKAE, Hideaki KAWATA
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Patent number: 9404535Abstract: A sliding bearing assembly for joints of construction equipment can be provided, in which production cost is reduced by decreasing the used amount of Cu and sulfides having high fixability to a matrix are dispersed. The sliding bearing assembly for joints of construction equipment, includes at least a shaft and a bush made of an iron-based sintered material which functions as a sliding bearing, in which the bush has the overall composition of, by mass %, 0.1 to 10% of Cu, 0.2 to 1.2% of C, 0.03 to 0.9% of Mn, 0.36 to 1.68% of S, and the balance of Fe and inevitable impurities, a metal structure has pores dispersed in a matrix mainly including a martensite structure and sulfide particles precipitated and dispersed, and the sulfide particles are dispersed at 1 to 7 volume % in the matrix.Type: GrantFiled: September 24, 2013Date of Patent: August 2, 2016Assignee: HITACHI CHEMICAL COMPANY, LTD.Inventors: Hidekazu Tokushima, Hideaki Kawata, Daisuke Fukae, Osamu Mawatari, Hideki Akita, Makoto Sugaya, Akiko Satou, Osamu Gokita, Shigeyuki Sakurai
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Patent number: 9340857Abstract: A sintered alloy has an overall composition consisting of, by mass %, 13.05 to 29.62% of Cr, 6.09 to 23.70% of Ni, 0.44 to 2.96% of Si, 0.2 to 1.0% of P, 0.6 to 3.0% of C, and the balance of Fe and inevitable impurities; a metallic structure in which carbides are precipitated and uniformly dispersed in an iron alloy matrix having dispersed pores; and a density of 6.8 to 7.4 Mg/m3. The carbides include specific carbides having maximum diameter of 1 to 10 ?m and area ratio of 90% or more with respect to the total carbides.Type: GrantFiled: March 11, 2013Date of Patent: May 17, 2016Assignee: HITACHI POWDERED METALS CO., LTD.Inventors: Daisuke Fukae, Hideaki Kawata
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Patent number: 9260772Abstract: A hard phase forming alloy powder, for forming a hard phase dispersed in a sintered alloy, consists of, by mass %, 15 to 35% of Mo, 1 to 10% of Si, 10 to 40% of Cr, and the balance of Co and inevitable impurities. A production method, for a wear resistant sintered alloy, includes preparing a matrix forming powder, the hard phase forming alloy powder, and a graphite powder. A wear resistant sintered alloy exhibits a metallic structure in which 15 to 45% of a hard phase is dispersed in a matrix. The hard phase consists of, by mass %, 15 to 35% of Mo, 1 to 10% of Si, 10 to 40% of Cr, and the balance of Co and inevitable impurities.Type: GrantFiled: December 6, 2012Date of Patent: February 16, 2016Assignee: HITACHI POWDERED METALS CO., LTD.Inventor: Hideaki Kawata
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Patent number: 9212572Abstract: A sintered valve guide exhibits a metallic structure having a mixed structure and a hard phase in which hard particles are dispersed in an alloy matrix. The mixed structure consists of pearlite, an Fe—P—C ternary eutectic phase, a ferrite phase, a copper phase, and pores, and the mixed structure consists of, by mass %, 0.075 to 0.525% of P, 3.0 to 10.0% of Cu, 1.0 to 3.0% of C, and the balance of Fe and inevitable impurities. The hard phase is dispersed at 2 to 15 mass % in the mixed structure.Type: GrantFiled: December 14, 2010Date of Patent: December 15, 2015Assignee: HITACHI POWDERED METALS CO., LTD.Inventors: Hiroki Fujitsuka, Hideaki Kawata
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Publication number: 20150240870Abstract: A sliding bearing assembly for joints of construction equipment can be provided, in which production cost is reduced by decreasing the used amount of Cu and sulfides having high fixability to a matrix are dispersed. The sliding bearing assembly for joints of construction equipment, includes at least a shaft and a bush made of an iron-based sintered material which functions as a sliding bearing, in which the bush has the overall composition of, by mass %, 0.1 to 10 % of Cu, 0.2 to 1.2% of C, 0.03 to 0.9% of Mn, 0.36 to 1.68% of S, and the balance of Fe and inevitable impurities, a metal structure has pores dispersed in a matrix mainly including a martensite structure and sulfide particles precipitated and dispersed, and the sulfide particles are dispersed at 1 to 7 volume % in the matrix.Type: ApplicationFiled: September 24, 2013Publication date: August 27, 2015Inventors: Hidekazu Tokushima, Hideaki Kawata, Daisuke Fukae, Osamu Mawarari, Hideki Akita, Makoto Sugaya, Akiko Satou, Osamu Gokita, Shigeyuki Sakurai
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Patent number: 8876935Abstract: A sintered material for valve guides consists of, by mass %, 1.3 to 3% of C, 1 to 4% of Cu, 0.01 to 0.08% of P, 0.05 to 0.5% of Sn, and the balance of Fe and inevitable impurities. The sintered material exhibits a metallic structure made of pores and a matrix. The matrix is a mixed structure of a pearlite phase, a ferrite phase, an iron-phosphorus-carbon compound phase, and at least one of a copper-tin alloy phase and a combination of a copper phase and a copper-tin alloy phase. A part of the pores includes graphite that is dispersed therein. The iron-phosphorus-carbon compound phase is dispersed at 3 to 25% by area ratio, and the copper-tin alloy phase and the combination of the copper phase and the copper-tin alloy phase are dispersed at 0.5 to 3.5% by area ratio, with respect to a cross section of the metallic structure, respectively.Type: GrantFiled: September 23, 2011Date of Patent: November 4, 2014Assignee: Hitachi Powdered Metals Co., Ltd.Inventors: Hiroki Fujitsuka, Hideaki Kawata
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Publication number: 20140314354Abstract: The oil-impregnated sintered bearing made of iron-copper sintered alloy consisting of 10-59% of Cu, 0.5-3% of Sn, and balance of De and impurities, includes pores in the iron-copper sintered alloy matrix of not less than 800 per mm2, has pores exposed at 20-50% by area ratio at the inner circumferential surface with diameters greater than 100w, not more than 0.5%, respectable to the total pores number. The pores number with diameters greater than 80 ?m and not greater than 100 ?m, not more than 0.1%, respectable to the total pores number with diameters greater than 60 ?m and not greater than 80 ?m is 0.5-1.5%, respectable to the total pores number, with diameters greater than 40 ?m and not greater than 60 ?m is 0.8-3% respectable to the total pores number, and the remainder pores are with diameters less than 40 ?m.Type: ApplicationFiled: April 22, 2014Publication date: October 23, 2014Applicant: HITACHI CHEMICAL COMPANY, LTD.Inventors: Naoki NISHIZAWA, Hideaki KAWATA, Hidekazu TOKUSHIMA