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公开(公告)号：US11717978B2
公开(公告)日：2023-08-08
申请号：US17414023
申请日：2020-08-11
发明人： Kensei Hamaki , Takato Yamanishi , Keiichi Tsuda
CPC分类号： B26D1/0006 , C22C1/051 , C22C19/03 , C22C19/07 , C22C29/067 , C22C29/08 , B26D2001/002
摘要： A cemented carbide includes a first hard phase and a binder phase. The first hard phase is composed of tungsten carbide grains. The binder phase includes cobalt and nickel as constituent elements. An arbitrary surface or arbitrary cross section of the cemented carbide has: a region R1 interposed between an interface between the tungsten carbide grains and the binder phase and an imaginary line A; a region R2 interposed between the imaginary line A and an imaginary line B; and a region R3 other than the region R1 and R2. When a line analysis is performed in a range including the region R1 and the region R3 adjacent to the region R1 with the region R2, a ratio C5/C20 of a maximum atomic concentration C5 at % of cobalt in the region R1 and a maximum atomic concentration C20 at % of cobalt in the region R3 is more than 1.
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公开(公告)号：US11408065B2
公开(公告)日：2022-08-09
申请号：US16465330
申请日：2016-12-28
发明人： Yoshiharu Utsumi , Paer Christoffer Arumskog , Keiichi Tsuda , Konstantinos Sarakinos , Sankara Pillay , Daniel Gunnar Magnfaelt
摘要： At least one layer in a coating located on a surface of a substrate is a domain structure layer constituted of two or more domains different in composition and a thin layer located between the domains and being different in composition from each of the domains. The thin layer is located between any one domain and any another domain and in contact therewith. When the size of each of a plurality of first domains present in the domain structure layer is defined as a diameter of a virtual circumcircle in contact with each first domain, the average value of the size of each first domain is not smaller than 1 nm and not greater than 10 nm and a thickness of the thin layer in a direction of thickness of the domain structure layer is not less than 1 atomic layer and not more than 10 atomic layers.
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公开(公告)号：US20180222804A1
公开(公告)日：2018-08-09
申请号：US15747494
申请日：2017-04-13
发明人： Yasuki Kido , Michiko Matsukawa , Keiichi Tsuda
摘要： A cemented carbide including a hard phase, a binding phase, and inevitable impurities. The hard phase satisfies a first hard phase composed mainly of tungsten carbide, and a second hard phase composed mainly of a compound. The compound contains multiple types of metallic elements including tungsten and at least one element selected from carbon, nitrogen, oxygen, and boron. The second hard phase satisfies D10/D90
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公开(公告)号：US20180195161A1
公开(公告)日：2018-07-12
申请号：US15744486
申请日：2016-07-06
发明人： Yoshiharu Utsumi , Paer Christoffer Arumskog , Keiichi Tsuda , Konstantinos Sarakinos , Daniel Gunnar Magnfaelt
CPC分类号： C23C14/0617 , C23C14/0036 , C23C14/021 , C23C14/024 , C23C14/0641 , C23C14/345 , C23C14/3485 , C23C14/35 , C23C14/352 , C23C14/505 , C23C14/541 , C23C14/545 , C23C14/548 , C23C28/044 , C23C28/048 , C23C28/44 , C23C30/005 , H01J37/3467
摘要： At least one layer in a coating located on a surface of a substrate is a domain structure layer constituted of two or more domains different in composition. The average value of the size of each of first domains, defined as the diameter of a virtual circumcircle in contact with each first domain, is 1 nm to 10 nm. The average value of the nearest neighbor distance of each first domain, defined as the length of the shortest straight line connecting the center of the circumcircle with the center of another circumcircle adjacent to the circumcircle, is 1 nm to 12 nm. 95% or more of the first domains has a size within ±25% of the average value of the size, and 95% or more of the first domains has a nearest neighbor distance within ±25% of the average value of the nearest neighbor distance.
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公开(公告)号：US10987739B2
公开(公告)日：2021-04-27
申请号：US15735766
申请日：2015-12-15
摘要： Provided are a cemented carbide having excellent plastic deformation resistance and a cutting tool in which the cemented carbide is used as a substrate. A cemented carbide includes a hard phase containing tungsten carbide particles and a binder phase containing, as a main component, an iron-group element, wherein the formula B/A≤0.05 is satisfied, where A represents the number of the tungsten carbide particles, and B represents the number of tungsten carbide particles whose number of contact points with other tungsten carbide particles is 1 or less. Preferably, the iron-group element includes cobalt, and the cobalt content in the cemented carbide is 8% by mass or more. Preferably, the tungsten carbide particles have an average particle diameter of 3 μm or more.
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公开(公告)号：US10858252B2
公开(公告)日：2020-12-08
申请号：US15772582
申请日：2016-10-21
发明人： Masato Michiuchi , Keiichi Tsuda , Yoshihiro Minato , Tomoyuki Ishida , Akihide Matsumoto , Takehiko Hayashi
IPC分类号： C01B21/082 , C22C1/05 , C22C29/04
摘要： A complex carbonitride powder contains Ti as a main component element and at least one additional element selected from the group consisting of Zr, Hf, V, Nb, Ta, Cr, Mo, W, Al, and Si. The complex carbonitride powder includes a plurality of complex carbonitride particles containing Ti and the additional element. The plurality of complex carbonitride particles include a plurality of homogeneous composition particles where average concentrations of Ti and the additional element in each complex carbonitride particle have a difference in a range of greater than or equal to −5 atom % and less than or equal to 5 atom % from average concentrations of Ti and the additional element in the whole complex carbonitride powder. A cross-sectional area of the homogeneous composition particles is greater than or equal to 90% of a cross-sectional area of the complex carbonitride particles 1p.
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公开(公告)号：US10689748B2
公开(公告)日：2020-06-23
申请号：US15744486
申请日：2016-07-06
发明人： Yoshiharu Utsumi , Paer Christoffer Arumskog , Keiichi Tsuda , Konstantinos Sarakinos , Daniel Gunnar Magnfaelt
IPC分类号： C23C14/06 , C23C14/35 , C23C28/04 , C23C14/54 , C23C14/02 , C23C30/00 , C23C14/34 , C23C28/00 , C23C14/00 , C23C14/50 , H01J37/34
摘要： At least one layer in a coating located on a surface of a substrate is a domain structure layer constituted of two or more domains different in composition. The average value of the size of each of first domains, defined as the diameter of a virtual circumcircle in contact with each first domain, is 1 nm to 10 nm. The average value of the nearest neighbor distance of each first domain, defined as the length of the shortest straight line connecting the center of the circumcircle with the center of another circumcircle adjacent to the circumcircle, is 1 nm to 12 nm. 95% or more of the first domains has a size within ±25% of the average value of the size, and 95% or more of the first domains has a nearest neighbor distance within ±25% of the average value of the nearest neighbor distance.
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公开(公告)号：US11214853B2
公开(公告)日：2022-01-04
申请号：US16324919
申请日：2017-05-29
发明人： Masato Michiuchi , Kosuke Fukae , Keiichi Tsuda
摘要： A hard material includes a first hard phase containing titanium carbonitride as a major constituent and a binder phase containing an iron group element as a major constituent. In any surface or cross-section of the hard material, the grain size D50 at a cumulative percentage of 50% of a grain size distribution by area of the first hard phase is 1.0 μm or more, and the average aspect ratio of first hard phase particles having grain sizes larger than or equal to D50 is 2.0 or less.
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公开(公告)号：US20170136571A1
公开(公告)日：2017-05-18
申请号：US15322662
申请日：2015-06-09
发明人： Yoshiharu Utsumi , Hiroka Aoyama , Keiichi Tsuda
IPC分类号： B23K20/12
CPC分类号： B23K20/12 , B23K20/1255
摘要： A spot friction welding tool is for performing spot friction welding of a first member and a second member by superposing the first member and the second member and pressing the spot friction welding tool against the first member and the second member from the first member side. Each of the first member and the second member is a steel plate having a tensile strength of not lower than 270 MPa and not higher than 370 MPa. The spot friction welding tool is rotatable around a rotation axis. The spot friction welding tool includes a column having a shoulder at a tip end thereof, and a cylindrical or truncated conical probe protruding from the shoulder in a direction of extension of the rotation axis.
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公开(公告)号：US11225412B2
公开(公告)日：2022-01-18
申请号：US16324922
申请日：2017-07-31
发明人： Kosuke Fukae , Masato Michiuchi , Keiichi Tsuda
IPC分类号： C01B21/082 , C09K3/14
摘要： A titanium carbonitride powder for use as a starting material for a hard material satisfies a D50 of from 2.0 μm to 6.0 μm and a D10/D90 of from 0.20 to 0.50, wherein D50 is a particle size at a cumulative percentage of 50% of a particle size distribution by volume, D10 is a particle size at a cumulative percentage of 10% of the particle size distribution by volume, and D90 is a particle size at a cumulative percentage of 90% of the particle size distribution by volume.
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