Patents by Inventor Tadahiko Furuta
Tadahiko Furuta 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: 20220186342Abstract: A non-magnetic member, which is used in an alternating magnetic field, comprises a titanium alloy comprising an alpha stabilizer in which an aluminum equivalent is 5.5-11.0 by mass fraction to the total mass of the titanium alloy and a beta stabilizer in which a molybdenum equivalent is 6.0-17.0 by mass fraction to the total mass of the titanium alloy. The beta stabilizer comprises iron and manganese.Type: ApplicationFiled: December 7, 2021Publication date: June 16, 2022Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Junya SUZUKI, Hidetaka HAYASHI, Tetsuya MITSUOKA, Tadahiko FURUTA
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Patent number: 7442266Abstract: A high-strength titanium alloy of the present invention includes Ti as a major component, 15 to 30 at % Va group element, and 1.5 to 7 at % oxygen (O) when the entirety is taken as 100 atomic % (at %), and its tensile strength is 1,000 MPa or more. Overturning the conventional concept, regardless of being high oxygen contents, it has been possible to achieve the compatibility between the high strength and high ductility on a higher level.Type: GrantFiled: September 26, 2003Date of Patent: October 28, 2008Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Tadahiko Furuta, Kazuaki Nishino, Takashi Saito, JungHwan Hwang
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Patent number: 7438849Abstract: A titanium alloy includes at least one alloying element whose molybdenum equivalent “Moeq” is from 3 to 11% by mass, at least one interstitial solution element selected from the group consisting of O, N and C in an amount of from 0.3 to 3% by mass, and the balance of Ti, when the entirety is taken as 100% by mass. Its content of Al is controlled to 1.8% by mass or less, and it is ? single phase at room temperature at least.Type: GrantFiled: September 17, 2003Date of Patent: October 21, 2008Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Shigeru Kuramoto, Tadahiko Furuta, Junghwan Hwang, Rong Chen, Nobuaki Suzuki, Kazuaki Nishino, Takashi Saito
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Patent number: 7261782Abstract: A titanium alloy obtained by a cold-working step, in which 10% or more of cold working is applied to a raw titanium alloy, comprising a Va group element and the balance of titanium substantially, and an aging treatment step, in which a cold-worked member, obtained after the cold-working step, is subjected to an aging treatment so that the parameter “P” falls in a range of from 8.0 to 18.5 at a treatment temperature falling in a range of from 150° C. to 600° C.; and characterized in that its tensile elastic limit strength is 950 MPa or more and its elastic deformation capability is 1.6% or more. This titanium alloy is of high elastic deformation capability as well as high tensile elastic limit strength, and can be utilized in a variety of products extensively.Type: GrantFiled: December 5, 2001Date of Patent: August 28, 2007Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: JungHwan Hwang, Tadahiko Furuta, Kazuaki Nishino, Takashi Saito
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Patent number: 6979375Abstract: A titanium alloy member is characterized in that it comprise 40% by weight or more titanium (Ti), a IVa group element and/or a Va group element other than the titanium, wherein a summed amount including the IVa group element and/or the Va group element as well as the titanium is 90% by weight or more, and one or more members made in an amount of from 0.2 to 2.0% by weight and selected from an interstitial element group consisting of oxygen, nitrogen and carbon, and that its basic structure is a body-centered tetragonal crystal or a body-centered cubic crystal in which a ratio (c/a) of a distance between atoms on the c-axis with respect to a distance between atoms on the a-axis falls in a range of from 0.9 to 1.1. This titanium alloy member has such working properties that conventional titanium alloys do not have, is flexible, exhibits a high strength, and can be utilized in a variety of products.Type: GrantFiled: May 1, 2001Date of Patent: December 27, 2005Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Tadahiko Furuta, Yoshiki Seno, JungHwan Hwang, Kazuaki Nishino, Takashi Saito
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Publication number: 20050072496Abstract: A titanium alloy obtained by a cold-working step, in which 10% or more of cold working is applied to a raw titanium alloy, comprising a Va group element and the balance of titanium substantially, and an aging treatment step, in which a cold-worked member, obtained after the cold-working step, is subjected to an aging treatment so that the parameter “P” falls in a range of from 8.0 to 18.5 at a treatment temperature falling in a range of from 150° C. to 600° C.; and characterized in that its tensile elastic limit strength is 950 MPa or more and its elastic deformation capability is 1.6% or more. This titanium alloy is of high elastic deformation capability as well as high tensile elastic limit strength, and can be utilized in a variety of products extensively.Type: ApplicationFiled: December 5, 2001Publication date: April 7, 2005Inventors: JungHwan Hwang, Tadahiko Furuta, Kazuaki Nishino, Takashi Saito
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Publication number: 20040115083Abstract: A high-strength titanium alloy of the present invention includes Ti as a major component, 15 to 30 at % Va group element, and 1.5 to 7 at % oxygen (O) when the entirety is taken as 100 atomic % (at %), and its tensile strength is 1,000 MPa or more.Type: ApplicationFiled: September 26, 2003Publication date: June 17, 2004Inventors: Tadahiko Furuta, Kazuaki Nishino, Takashi Saito, JungHwan Hwang
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Publication number: 20040055675Abstract: A titanium alloy includes at least one alloying element whose molybdenum equivalent “Moeq” is from 3 to 11% by mass, at least one interstitial solution element selected from the group consisting of O, N and C in an amount of from 0.3 to 3% by mass, and the balance of Ti, when the entirety is taken as 100% by mass. Its content of Al is controlled to 1.8% by mass or less, and it is &bgr; single phase at room temperature at least.Type: ApplicationFiled: September 17, 2003Publication date: March 25, 2004Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Shigeru Kuramoto, Tadahiko Furuta, Junghwan Hwang, Rong Chen, Nobuaki Suzuki, Kazuaki Nishino, Takashi Saito
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Patent number: 6607693Abstract: A titanium alloy according to the present invention is characterized in that it comprises an element of Va group (the vanadium group) in an amount of 30-60% by weight and the balance of titanium substantially, exhibits an average Young's modulus of 75 GPa or less, and exhibits a tensile elastic limit strength of 700 MPa or more. This titanium alloy can be used in a variety of products, which are required to exhibit a low Young's modulus, a high elastic deformability and a high strength, in a variety of fields.Type: GrantFiled: February 12, 2001Date of Patent: August 19, 2003Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Takashi Saito, Tadahiko Furuta, Kazuaki Nishino, Hiroyuki Takamiya
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Patent number: 6599467Abstract: The invention provides a process for forging a titanium-based material comprises the steps of: preparing a titanium-based sintered workpiece including at least one of ceramics particles and pores in a total amount of 1% or more by volume, the ceramics particles being thermodynamically stable in a titanium alloy; and heating the workpiece to a forging temperature and forging the same. In the production process, the pores or the ceramics particles inhibit the grain growth during forging. Accordingly, it is possible to carry out the forging at a relatively high temperature at which the titanium-based material exhibits a small resistance to deformation. Moreover, the titanium-based material can maintain an appropriate microstructure even after the forging. Consequently, the impact value and the fatigue strength are inhibited from decreasing.Type: GrantFiled: October 15, 1999Date of Patent: July 29, 2003Assignees: Toyota Jidosha Kabushiki Kaisha, Aisan Kogyo Kabushiki KaishaInventors: Toshiya Yamaguchi, Akio Hotta, Yoshinori Shibata, Tadahiko Furuta, Takashi Saito, Satoru Iwase, Takashi Haruta, Tatsuya Kitamura
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Publication number: 20030102062Abstract: A titanium alloy member is characterized in that it comprises 40% by weight or more titanium (Ti), a IVa group element and/or a Va group element other than the titanium, wherein a summed amount including the IVa group element and/or the Va group element as well as the titanium is 90% by weight or more, and one or more members made in an amount of from 0.2 to 2.0% by weight and selected from an interstitial element group consisting of oxygen, nitrogen and carbon, and that its basic structure is a body-centered tetragonal crystal or a body-centered cubic crystal in which a ratio (c/a) of a distance between atoms on the c-axis with respect to a distance between atoms on the a-axis falls in a range of from 0.9 to 1.1.Type: ApplicationFiled: January 2, 2002Publication date: June 5, 2003Inventors: Tadahiko Furuta, Yoshiki Seno, JungHwan Hwang, Kazuaki Nishino, Takashi Saito
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Patent number: 6551371Abstract: A titanium-based composite material according to the present invention is characterized in that it comprises: a matrix containing a titanium (Ti) alloy as a major component, and titanium compound particles and/or rare-earth element compound particles dispersed in the matrix, wherein the matrix contains 3.0-7.0% by weight of aluminum (Al), 2.0-6.0% by weight of tin (Sn), 2.0-6.0% by weight of zirconium (Zr), 0.1-0.4% by weight of silicon (Si) and 0.1-0.5% by weight of oxygen (O), the titanium compound particles occupy 1-10% by volume, and the rare-earth element compound particles occupy 3% by volume or less. With this arrangement, it is possible to obtain a titanium material, which is good in terms of the heat resistance, hot working property, specific strength, and so on.Type: GrantFiled: January 22, 2001Date of Patent: April 22, 2003Assignees: Kabushiki Kaisha Toyota Chuo Kenkyusho, Toyota Jidosha Kabushiki KaishaInventors: Tadahiko Furuta, Takashi Saito, Hiroyuki Takamiya, Toshiya Yamaguchi
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Patent number: 6387196Abstract: A process for producing a particle-reinforced titanium alloy includes the steps of: heating a titanium alloy in which ceramic particles having a thermodynamically stable property are dispersed in a temperature range of not less than &bgr;-transus temperature; and cooling the titanium alloy to pass through the &bgr;-transus temperature at a cooling rate of 0.1-30° C./second. The process can further include, before the heating step, the step of compressing the titanium alloy in a two phase temperature range of &agr;+&bgr; thereof or in a temperature range of not less than &bgr;-transus temperature.Type: GrantFiled: October 18, 1999Date of Patent: May 14, 2002Assignees: Toyota Jidosha Kabushiki Kaisha, Kabushiki Kaisha Chuo Kenkyusho, Aisan Kogyo Kabushiki KaishaInventors: Toshiya Yamaguchi, Tadahiko Furuta, Takashi Saito, Kouji Sakurai
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Patent number: 6309699Abstract: The invention provides a method of producing an oxidation-resistant metallic part which exhibits oxidation resistance even in an oxidation atmosphere. The method includes the step of applying mechanical energy to a surface of a metallic part in the presence of particulates, and forming a protective coating in a surface of the metallic part. When the metallic part thus treated is exposed in a high temperature-oxidation atmosphere, the protective coating is oxidized to restrain the proceeding of the oxidation of the metallic part, that is the internally proceeding formation of TiO2, thus serving a remarkable improvement of the oxidation resistance.Type: GrantFiled: February 22, 1999Date of Patent: October 30, 2001Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Hiroyuki Kawaura, Hiroshi Kawahara, Takashi Saito, Kazuaki Nishino, Nobuhiko Matsumoto, Tadahiko Furuta
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Publication number: 20010001968Abstract: The invention provides a method of producing an oxidation-resistant metallic part which exhibits sufficiently good oxidation resistance even in an oxidation atmosphere. The method includes the step of applying mechanical energy to a surface of a metallic part in the presence of particulates, and forming a protective coating in a surface of the metallic part. When the metallic part thus treated is exposed in a high temperature-oxidation atmosphere, the protective coating is oxidized to restrain the proceeding of the oxidation of the metallic part, that is the internally proceeding formation of TiO 2, thus serving a remarkable improvement of the oxidation resistance.Type: ApplicationFiled: February 22, 1999Publication date: May 31, 2001Inventors: HIROYUKI KAWAURA, HIROSHI KAWAHARA, TAKASHI SAITO, KAZUAKI NISHINO, NOBUHIKO MATSUMOTO, TADAHIKO FURUTA
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Patent number: 6117204Abstract: A sintered Ti alloy material and a process for producing the same, which comprises a matrix mainly comprising a Ti alloy, and TiB dispersed and maintained in said matrix, wherein a composition of the sintered Ti alloy material at least comprises from 0.1 to 8.0% by weight of B, from 3.0 to 30.0% by weight of Mo, 50% by weight or more of Ti, and the balance of unavoidable impurities.Type: GrantFiled: September 16, 1998Date of Patent: September 12, 2000Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Takashi Saito, Tadahiko Furuta, Hiroyuki Takamiya
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Patent number: 5520879Abstract: A sintered titanium alloy is composed of a titanium matrix or titanium alloy matrix and hard particles dispersed in the matrix, the sintered titanium alloy comprises: 4-8 mass % of aluminum (Al); 2-6 mass % of vanadium (V); 0.15-0.8 mass % of oxygen (O); at least one element selected from the group consisting of 0.2-9 mass % of boron (B), 0.5-3 mass % of at least one of molybdenum (Mo), tungsten (W), tantalum (Ta), zirconium (Zr), niobium (Nb), and hafnium (Hf), 0.05-2 mass % of at least one of Ia Group elements, IIa Group elements, and IIIa Group elements, 0.05-0.5 mass % of at least one of halogens; with the balance being titanium (Ti) and inevitable impurities.Type: GrantFiled: January 11, 1995Date of Patent: May 28, 1996Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Takashi Saito, Tadahiko Furuta
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Patent number: 5409518Abstract: A sintered titanium alloy is composed of a titanium matrix or titanium alloy matrix and hard particles dispersed in the matrix, the sintered titanium alloy comprises: 4-8 mass % of aluminum (Al); 2-6 mass % of vanadium (V); 0.15-0.8 mass % of oxygen (O); at least one element selected from the group consisting of 0.2-9 mass % of boron (B), 0.5-3 mass % of at least one of molybdenum (Mo), tungsten (W), tantalum (Ta), zirconium (Zr), niobium (Nb), and hafnium (Hf), 0.05-2 mass % of at least one of Ia Group elements, IIa Group elements, and IIIa Group elements, 0.05-0.5 mass % of at least one of halogens; with the balance being titanium (Ti) and inevitable impurities.Type: GrantFiled: November 8, 1991Date of Patent: April 25, 1995Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Takashi Saito, Tadahiko Furuta