Patents by Inventor Takeshi Nishiuchi
Takeshi Nishiuchi 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).
-
Patent number: 11934360Abstract: A database storing data associated with an identifier unique to each sample, the data including first data representative of at least one of composition data, processing data, and property data for the each sample, and second data representative of microstructure data for the each sample. The microstructure data includes a feature determined based on a temperature dependence of magnetization for the each sample.Type: GrantFiled: June 5, 2023Date of Patent: March 19, 2024Assignee: PROTERIAL, LTD.Inventors: Takeshi Nishiuchi, Daisuke Furusawa, Asami Oya
-
Patent number: 11803522Abstract: A database storing data associated with an identifier unique to each sample, the data including first data representative of at least one of composition data, processing data, and property data for the each sample, and second data representative of microstructure data for the each sample. The microstructure data includes a feature determined based on a temperature dependence of magnetization for the each sample.Type: GrantFiled: August 2, 2022Date of Patent: October 31, 2023Assignee: PROTERIAL, LTD.Inventors: Takeshi Nishiuchi, Daisuke Furusawa, Asami Oya
-
Publication number: 20230325365Abstract: A database storing data associated with an identifier unique to each sample, the data including first data representative of at least one of composition data, processing data, and property data for the each sample, and second data representative of microstructure data for the each sample. The microstructure data includes a feature determined based on a temperature dependence of magnetization for the each sample.Type: ApplicationFiled: June 5, 2023Publication date: October 12, 2023Inventors: Takeshi NISHIUCHI, Daisuke FURUSAWA, Asami OYA
-
Publication number: 20230280700Abstract: A computer-performed process estimation method and a process estimation method using the computer are provided for estimating, based on a first process data including a process information of a predetermined target step performed in a first manufacturing device that manufactures a material through at least one step including the target step, a second process data including a process information of the target step performed in a second manufacturing device that is a different device from the first manufacturing device and manufactures the material through at least one step including the target step.Type: ApplicationFiled: February 24, 2023Publication date: September 7, 2023Inventors: Takeshi NISHIUCHI, Yasuaki Tanioku
-
Publication number: 20230041536Abstract: A database storing data associated with an identifier unique to each sample, the data including first data representative of at least one of composition data, processing data, and property data for the each sample, and second data representative of microstructure data for the each sample. The microstructure data includes a feature determined based on a temperature dependence of magnetization for the each sample.Type: ApplicationFiled: August 2, 2022Publication date: February 9, 2023Inventors: Takeshi NISHIUCHI, Daisuke FURUSAWA, Asami OYA
-
Patent number: 10923256Abstract: To provide an R-T-B based sintered magnet including R: 27.5 to 34.0% by mass, RH: 2 to 10% by mass, B: 0.89 to 0.95% by mass, Ti: 0.1 to 0.2% by mass, Ga: 0.3 to 0.7% by mass, Cu: 0.07 to 0.50% by mass, Al: 0.05 to 0.50% by mass, M (M is Nb and/or Zr): 0 to 0.3% by mass, balance T, and inevitable impurities, the following inequality expressions (1), (2), and (3) being satisfied: [T]?72.3([B]?0.45[Ti])>0??(1) ([T]?72.3([B]?0.45[Ti]))/55.85<13[Ga]/69.72??(2) [Ga]?[Cu]??(3).Type: GrantFiled: June 17, 2016Date of Patent: February 16, 2021Assignee: HITACHI METALS, LTD.Inventors: Teppei Satoh, Futoshi Kuniyoshi, Rintaro Ishii, Takeshi Nishiuchi, Noriyuki Nozawa
-
Patent number: 10916373Abstract: A sintered R-T-B based magnet composition includes: R: not less than 27 mass % and not more than 37 mass % (R is at least one rare-earth element which always includes at least one of Nd and Pr), B: not less than 0.75 mass % and not more than 0.97 mass %, Ga: not less than 0.1 mass % and not more than 1.0 mass %, Cu: not less than 0 mass % and not more than 1.0 mass %, and T: 61.03 mass % or more (where T is at least one selected from Fe, Co, Al, Mn and Si and always includes Fe, such that the Fe content is 80 mass % or more in the entire T). [T]/[B] is greater than 14.0. An R amount is greater in the surface than in the center, and a Ga amount is greater in the surface than in the center. [T]/[B] in the surface is higher than [T]/[B] in the center.Type: GrantFiled: November 30, 2017Date of Patent: February 9, 2021Assignee: HITACHI METALS, LTD.Inventors: Noriyuki Nozawa, Yasutaka Shigemoto, Takeshi Nishiuchi
-
Patent number: 10847290Abstract: To provide an R-T-B based sintered magnet having high Br and high HcJ while suppressing the content of Dy. Disclosed is an R-T-B based sintered magnet represented by the formula: uRwBxGayCuzAlqM(balance)T, where R is composed of light rare-earth element(s) RL and heavy rare-earth element(s) RH, RL is Nd and/or Pr, RH is Dy and/or Tb, T is Fe, and 10% by mass or less of Fe is capable of being replaced with Co, M is Nb and/or Zr, inevitable impurities being included, and u, w, x, y, z and q are expressed in terms of % by mass; RH accounts for 5% by mass or less of the R-T-B based sintered magnet, 0.4?x?1.0, 0.07?y?1.0, 0.05?z?0.5, 0?q?0.1, and 0.100?y/(x+y)?0.340; v=u?(6?+10?+8?), where the amount of oxygen (% by mass) is ?, the amount of nitrogen (% by mass) is ?, and the amount of carbon (% by mass) is ?; and v and w satisfy the following inequality expressions: v?32.0, 0.84?w?0.93, and ?12.5w+38.75?v??62.5w+86.125.Type: GrantFiled: August 11, 2014Date of Patent: November 24, 2020Assignee: HITACHI METALS, LTD.Inventors: Takeshi Nishiuchi, Takayuki Kanda, Rintaro Ishii, Futoshi Kuniyoshi, Teppei Satoh
-
Publication number: 20190326053Abstract: In an embodiment, a sintered R-T-B based magnet according to the present disclosure has a composition as follows: R: not less than 27 mass % and not more than 37 mass % (R is at least one rare-earth element which always includes at least one of Nd and Pr), B: not less than 0.75 mass % and not more than 0.97 mass %, Ga: not less than 0.1 mass % and not more than 1.0 mass %, Cu: not less than 0 mass % and not more than 1.0 mass %, and T: 61.03 mass % or more (where T is at least one selected from the group consisting of Fe, Co, Al, Mn and Si and always includes Fe, such that the Fe content accounts for 80 mass % or more in the entire T). The molar ratio of T to B ([T]/[B]) is greater than 14.0. An R amount in a magnet surface portion is greater than an R amount in a magnet central portion, and a Ga amount in the magnet surface portion is greater than a Ga amount in the magnet central portion.Type: ApplicationFiled: November 30, 2017Publication date: October 24, 2019Inventors: Noriyuki NOZAWA, Yasutaka SHIGEMOTO, Takeshi NISHIUCHI
-
Publication number: 20180182518Abstract: To provide an R-T-B based sintered magnet including R: 27.5 to 34.0% by mass, RH: 2 to 10% by mass, B: 0.89 to 0.95% by mass, Ti: 0.1 to 0.2% by mass, Ga: 0.3 to 0.7% by mass, Cu: 0.07 to 0.50% by mass, Al: 0.05 to 0.50% by mass, M (M is Nb and/or Zr): 0 to 0.3% by mass, balance T, and inevitable impurities, the following inequality expressions (1), (2), and (3) being satisfied: [T]?72.3([B]?0.45[Ti])>0??(1) ([T]?72.3([B]?0.45[Ti]))/55.85<13[Ga]/69.Type: ApplicationFiled: June 17, 2016Publication date: June 28, 2018Applicant: HITACHI METALS, LTD.Inventors: Teppei SATOH, Futoshi KUNIYOSHI, Rintaro ISHII, Takeshi NISHIUCHI, Noriyuki NOZAWA
-
Publication number: 20180047504Abstract: [Problem] There is provided a method of producing a sintered R-T-B based magnet in which even the intergranular grain boundaries in the magnet interior can be made thick, which does not allow coercivity improvement effects to be significantly undermined even after a surface grinding, and which has high coercivity without the use of heavy rare-earth elements. [Solution] It includes: a step of providing an R1-T1-A-X (where R1 is mainly Nd; T1 is mainly Fe; A is at least one of Ga, Ti, Zr, Hf, V, Nb and Mo; and X is mainly B) based sintered alloy compact which is mainly characterized in that a molar ratio of Ti/(X-2A) is not less than 13; a step of providing an R2-Ga—Cu (where R2 is mainly Pr and/or Nd and accounts for 65 mol % and not more than 95 mol %; and Cu/(Ga+Cu) is not less than 0.1 and not more than 0.Type: ApplicationFiled: February 16, 2016Publication date: February 15, 2018Inventors: Takeshi NISHIUCHI, Yasutaka SHIGEMOTO, Noriyuki NOZAWA
-
Publication number: 20180025819Abstract: A step of providing an R1-T1-X (where R1 is mainly Nd; T1 is mainly Fe; and X is mainly B) based sintered alloy compact mainly characterized by a molar ratio of [T1]/[X] being 13.0 or more; a step or providing an R2-Ga—Cu (where R2 is mainly Pr and/or Nd and accounts for not less than 65 mol % and not more than 95 mol %; and [Cu]/([Ga]+[Cu]) is not less than 0.1 and not more than 0.9 by mole ratio) based alloy; and a step of, while allowing at least a portion of a surface of the R1-T1-X based sintered alloy compact to be in contact with at least a portion of the R2-Ga—Cu based alloy, performing a heat treatment at a temperature which is not less than 450° C. and not more than 600° C.Type: ApplicationFiled: February 16, 2016Publication date: January 25, 2018Applicant: HITACHI METALS, LTD.Inventors: Yasutaka SHIGEMOTO, Takeshi NISHIUCHI, Futoshi KUNIYOSHI, Noriyuki NOZAWA
-
Publication number: 20170018342Abstract: An R-T-B based sintered magnet has a composition represented by the following formula (1) which satisfies the following inequality expressions (2) to (9): uRwBxGazAlvCoqTigFejM??(1) (R is at least one of rare-earth elements and indispensably includes Nd, M is an element except for R, B, Ga, Al, Co, Ti, and Fe, and u, w, x, z, v, q, g, and j are expressed in terms of % by mass). 29.0?u?32.0??(2) (heavy rare-earth elements RH account for 10% by mass or less of the R-T-B based sintered magnet) 0.93?w?1.00??(3) 0.3?x?0.8??(4) 0.05?z?0.5??(5) 0?v?3.0??(6) 0.15?q?0.28??(7) 60.42?g?69.57??(8) 0?j?2.0??(9) and satisfies other requirements.Type: ApplicationFiled: February 27, 2015Publication date: January 19, 2017Applicant: HITACHI METALS, LTD.Inventors: Tomoki FUKAGAWA, Noriyuki NOZAWA, Takeshi NISHIUCHI, Daisuke FURUSAWA, Shinichiroh SAKASHITA
-
Patent number: 9418786Abstract: An R—Fe—B based porous magnet according to the present invention has an aggregate structure of Nd2Fe14B type crystalline phases with an average grain size of 0.1 ?m to 1 ?m. At least a portion of the magnet is porous and has micropores with a major axis of 1 ?m to 20 ?m.Type: GrantFiled: August 16, 2012Date of Patent: August 16, 2016Assignee: HITACHI METALS, LTD.Inventors: Takeshi Nishiuchi, Noriyuki Nozawa, Satoshi Hirosawa, Tomohito Maki, Katsunori Bekki
-
Publication number: 20160189838Abstract: To provide an R-T-B based sintered magnet having high Br and high HcJ while suppressing the content of Dy. Disclosed is an R-T-B based sintered magnet represented by the formula: uRwBxGayCuzAlqM(balance)T, where R is composed of light rare-earth element(s) RL and heavy rare-earth element(s) RH, RL is Nd and/or Pr, RH is Dy and/or Tb, T is Fe, and 10% by mass or less of Fe is capable of being replaced with Co, M is Nb and/or Zr, inevitable impurities being included, and u, w, x, y, z and q are expressed in terms of % by mass; RH accounts for 5% by mass or less of the R-T-B based sintered magnet, 0.4?x?1.0, 0.07?y?1.0, 0.05?z?0.5, 0?q?0.1, and 0.100?y/(x+y)?0.340; v=u?(6?+10?+8?), where the amount of oxygen (% by mass) is ?, the amount of nitrogen (% by mass) is ?, and the amount of carbon (% by mass) is ?; and v and w satisfy the following inequality expressions: v?32.0, 0.84?w?0.93, and ?12.5w+38.75?v??62.5w+86.125.Type: ApplicationFiled: August 11, 2014Publication date: June 30, 2016Applicant: HITACHI METALS, LTD.Inventors: Takeshi NISHIUCHI, Takayuki KANDA, Rintaro ISHII, Futoshi KUNIYOSHI, Teppei SATOH
-
Publication number: 20160042848Abstract: To provide an R-T-B based sintered magnet having high Br and high HcJ without using Dy. Disclosed is an R-T-B based sintered magnet which includes an Nd2Fe14B type compound as a main phase, and comprises the main phase, a first grain boundary phase located between two main phases, and a second grain boundary phase located between three or more main phases, wherein the composition of the R-T-B based sintered magnet comprises: R: 29.0% by mass or more and 31.5% by mass or less, B: 0.86% by mass or more and 0.90% by mass or less, Ga: 0.4% by mass or more and 0.6% by mass or less, Al: 0.5% by mass or less (including 0% by mass), and balance being T and inevitable impurities.Type: ApplicationFiled: March 27, 2014Publication date: February 11, 2016Applicant: HITACHI METALS, LTD.Inventors: Futoshi KUNIYOSHI, Rintaro ISHII, Takeshi NISHIUCHI, Tsunehiro KAWATA
-
Publication number: 20160042847Abstract: To provide an R-T-B based sintered magnet having high Br and high HcJ without using Dy by solving a problem that a significant reduction in Br due to a decrease in B concentration and HcJ are insufficient to satisfy recent requirements. Disclosed is an R-T-B based sintered magnet which includes an Nd2Fe14B type compound as a main phase, and comprises the main phase, a first grain boundary phase located between two main phases, and a second grain boundary phase located between three or more main phases, wherein the first grain boundary phase having a thickness of 5 nm or more and 30 nm or less is present.Type: ApplicationFiled: March 27, 2014Publication date: February 11, 2016Applicant: HITACHI METALS, LTD.Inventors: Takeshi NISHIUCHI, Futoshi KUNIYOSHI, Rintaro ISHII, Tsunehiro KAWATA
-
Publication number: 20130068992Abstract: An R-T-B based permanent magnet powder, which has been made by an HDDR process and which has an average crystal grain size of 0.1 ?m to 1 ?m and a crystal grain aspect ratio (ratio of the major axis size to the minor axis size) of 2 or less, is provided (Step (A)). R is a rare-earth element, of which at least 95 at % is Nd and/or Pr, and T is either Fe alone or Fe partially replaced with Co and/or Ni and is a transition metal element, of which at least 50 at % is Fe. Meanwhile, an R?—Cu based alloy powder, which is made up of R? and Cu, which accounts for 2 at % to 50 at % of the alloy powder, is also provided (Step (B)). R? is a rare-earth element, of which at least 90 at % is Nd and/or Pr but which includes neither Dy nor Tb. The R-T-B based permanent magnet powder and the R?—Cu based alloy powder are mixed together to obtain a mixed powder (Step (C)). And then the mixed powder is subjected to a heat treatment process at a temperature of 500° C. to 900° C.Type: ApplicationFiled: May 19, 2011Publication date: March 21, 2013Inventors: Kazuhiro Hono, Tadakatsu Ohkubo, Hossein Sepehri Amin, Noriyuki Nozawa, Takeshi Nishiuchi, Satoshi Hirosawa
-
Publication number: 20120306308Abstract: An R—Fe—B based porous magnet according to the present invention has an aggregate structure of Nd2Fe14B type crystalline phases with an average grain size of 0.1 ?m to 1 ?m. At least a portion of the magnet is porous and has micropores with a major axis of 1 ?m to 20 ?m.Type: ApplicationFiled: August 16, 2012Publication date: December 6, 2012Applicant: HITACHI METALS, LTD.Inventors: Takeshi NISHIUCHI, Noriyuki NOZAWA, Satoshi HIROSAWA, Tomohito MAKI, Katsunori BEKKI
-
Patent number: 8268093Abstract: An R—Fe—B based porous magnet according to the present invention has an aggregate structure of Nd2Fe14B type crystalline phases with an average grain size of 0.1 ?m to 1 ?m. At least a portion of the magnet is porous and has micropores with a major axis of 1 ?m to 20 ?m.Type: GrantFiled: May 18, 2007Date of Patent: September 18, 2012Assignee: Hitachi Metals, Ltd.Inventors: Takeshi Nishiuchi, Noriyuki Nozawa, Satoshi Hirosawa, Tomohito Maki, Katsunori Bekki