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公开(公告)号：US11591681B2
公开(公告)日：2023-02-28
申请号：US15534133
申请日：2016-08-30
发明人： Tomoyuki Ueno , Koji Yamada , Kazuya Takizawa , Yuki Adachi , Tetsuya Hayashi
摘要： An iron-based sintered body includes a metal matrix and complex oxide particles contained in the metal matrix. When a main viewing field having an area of 176 μm×226 μm is taken on a cross section of the iron-based sintered body and divided into a 5×5 array of 25 viewing fields each having an area of 35.2 μm×45.2 μm, the complex oxide particles have an average equivalent circle diameter of from 0.3 μm to 2.5 μm inclusive, and a value obtained by dividing the total area of the 25 viewing fields by the total number of complex oxide particles present in the 25 viewing fields is from 10 μm2/particle to 1,000 μm2/particle inclusive. The number of viewing fields in which no complex oxide particle is present is 4 or less out of the 25 viewing fields.
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2.发明申请公开(公告)号：US20180202029A1
公开(公告)日：2018-07-19
申请号：US15741916
申请日：2017-02-02
发明人： Tomoyuki Ueno , Koji Yamada , Kazuya Takizawa , Yuki Adachi , Tetsuya Hayashi
CPC分类号： C22C33/02 , B22F1/0011 , B22F9/04 , B22F2009/044 , B22F2301/35 , B22F2302/35 , B22F2304/10 , B22F2998/10 , B22F2999/00 , B24D18/0009 , C03C3/091 , C03C8/02 , C03C2214/08 , C22C32/0026 , C22C33/0228 , C22C38/00 , C22C38/04 , B22F3/02 , B22F3/10 , B22F7/06
摘要： An iron-based powder for powder metallurgy includes an iron-based powder and a composite oxide powder, and the composite oxide contains, by mass, from 15% to 30% Si, from 9% to 18% Al, from 3% to 6% B, from 0.5% to 3% Mg, from 2% to 6% Ca, from 0.01% to 1% Sr, and from 45% to 55% O.
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公开(公告)号：US10280488B2
公开(公告)日：2019-05-07
申请号：US15741916
申请日：2017-02-02
发明人： Tomoyuki Ueno , Koji Yamada , Kazuya Takizawa , Yuki Adachi , Tetsuya Hayashi
IPC分类号： B22F1/02 , C22C1/00 , C22C33/02 , B22F1/00 , C03C8/02 , B24D18/00 , C22C38/04 , C03C3/091 , C22C32/00 , C22C38/00 , B22F9/04
摘要： An iron-based powder for powder metallurgy includes an iron-based powder and a composite oxide powder, and the composite oxide contains, by mass, from 15% to 30% Si, from 9% to 18% Al, from 3% to 6% B, from 0.5% to 3% Mg, from 2% to 6% Ca, from 0.01% to 1% Sr, and from 45% to 55% O.
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公开(公告)号：US20180236548A1
公开(公告)日：2018-08-23
申请号：US15750703
申请日：2017-04-04
CPC分类号： B22F3/10 , B22F1/0007 , B22F1/0059 , B22F3/03 , B22F5/008 , B22F5/06 , B22F5/08 , B22F5/085 , B22F5/10 , B22F2003/026 , B22F2003/247 , B22F2009/0828 , B22F2998/10 , B22F2999/00 , C22C33/02 , C22C33/0264 , C22C38/00 , B22F3/02 , B22F2009/0824 , B22F2201/30 , B22F2201/05 , B22F2201/01
摘要： A sintered body manufacturing method includes: a preparation step of preparing a raw material powder containing an iron-based metal powder; a molding step of subjecting the raw material powder to uniaxial pressing using a die to produce a green compact having an overall average relative density of 93% or more; a machining step of machining the green compact to produce a machined compact; and a sintering step of sintering the machined compact to obtain a sintered body.
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公开(公告)号：US20210283685A1
公开(公告)日：2021-09-16
申请号：US17336537
申请日：2021-06-02
摘要： A method for collecting an iron-based powder includes the steps of; preparing a raw material powder containing a first metal powder containing 90% by mass or more of iron; forming a green compact by subjecting the raw material powder to uniaxial pressing using a die; machining the green compact; and collecting a second metal powder having an average particle diameter of 50 μm or more and 500 μm or less from machining chips generated in the step of machining.
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公开(公告)号：US20170369977A1
公开(公告)日：2017-12-28
申请号：US15534133
申请日：2016-08-30
发明人： Tomoyuki Ueno , Koji Yamada , Kazuya Takizawa , Yuki Adachi , Tetsuya Hayashi
CPC分类号： C22C49/14 , C22C32/0026 , C22C33/0228 , C22C38/00 , C22C38/002 , C22C38/04 , C22C47/14
摘要： An iron-based sintered body includes a metal matrix and complex oxide particles contained in the metal matrix. When a main viewing field having an area of 176 μm×226 μm is taken on a cross section of the iron-based sintered body and divided into a 5×5 array of 25 viewing fields each having an area of 35.2 μm×45.2 μm, the complex oxide particles have an average equivalent circle diameter of from 0.3 μm to 2.5 μm inclusive, and a value obtained by dividing the total area of the 25 viewing fields by the total number of complex oxide particles present in the 25 viewing fields is from 10 μm2/particle to 1,000 μm2/particle inclusive. The number of viewing fields in which no complex oxide particle is present is 4 or less out of the 25 viewing fields.
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公开(公告)号：US10196716B2
公开(公告)日：2019-02-05
申请号：US15741916
申请日：2017-02-02
发明人： Tomoyuki Ueno , Koji Yamada , Kazuya Takizawa , Yuki Adachi , Tetsuya Hayashi
IPC分类号： B22F1/02 , C22C1/00 , C22C33/02 , B22F1/00 , C03C8/02 , B24D18/00 , C22C38/04 , C03C3/091 , C22C32/00 , C22C38/00 , B22F9/04
摘要： An iron-based powder for powder metallurgy includes an iron-based powder and a composite oxide powder, and the composite oxide contains, by mass, from 15% to 30% Si, from 9% to 18% Al, from 3% to 6% B, from 0.5% to 3% Mg, from 2% to 6% Ca, from 0.01% to 1% Sr, and from 45% to 55% O.
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公开(公告)号：US11623275B2
公开(公告)日：2023-04-11
申请号：US17051398
申请日：2019-05-17
摘要： A method for producing a sintered member, including the steps of: preparing a raw powder; press-forming the raw powder to produce a green compact; and sintering the green compact by high-frequency induction heating, wherein a temperature of the green compact in the sintering step is controlled to satisfy all the following conditions (I) to (III): (I) the temperature is increased without maintaining the temperature in a temperature range equal to or higher than an A1 point of an Fe—C phase diagram and lower than the sintering temperature of the green compact, (II) a heating rate is set to 12° C./s or more in a temperature range of the A1 point to an A3 point of the Fe—C phase diagram, and (III) a heating rate is set to 4° C./s or more in a temperature range of the A3 point of the Fe—C phase diagram to the sintering temperature of the green compact.
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公开(公告)号：US11604312B2
公开(公告)日：2023-03-14
申请号：US17494090
申请日：2021-10-05
发明人： Tetsuya Hayashi
IPC分类号： G02B6/02
摘要： This disclosure relates to an MCF fiber being usable for short-haul O-band transmission, having a standard coating diameter in an MFD almost the same as that of a general-purpose SMF, being capable of splicing fibers without either a marker or a polarity, and including 12 cores usable for counter propagation. The MCF includes 12 cores and a common cladding, and the common cladding has an outer periphery with a circular cross-section, the 12 cores are arranged such that no adjacent relationship is established between cores each having an adjacent relationship with any core, and are arranged such that centers of the 12 cores are line symmetric with respect to an axis as a symmetry axis that intersects with the central axis and that passes through none of the centers of the 12 cores, and an arrangement of the centers of the 12 cores has rotational symmetry once.
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公开(公告)号：US11156529B2
公开(公告)日：2021-10-26
申请号：US16662499
申请日：2019-10-24
发明人： Takemi Hasegawa , Tetsuya Hayashi
摘要： The present invention relates to a method and device for measuring optical nonlinearity of an optical fiber to be measured comprising a plurality of cores having mutually coupled waveguide modes. The method includes, at least, preparing a laser light source emitting laser light and a detecting unit determining an optical intensity, inputting laser light into a specific core of the optical fiber to be measured, determining the intensity of a specific wavelength component caused by optical nonlinearity among the reflective light components from the optical fiber to be measured, and determining optical nonlinearity of the optical fiber to be measured on the basis of the intensity of the specific wavelength component.
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