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1.发明公开公开(公告)号：US20240246169A1
公开(公告)日：2024-07-25
申请号：US18585450
申请日：2024-02-23
发明人： Takayuki FUKASAWA , Kai FUNAKI , Yutaka ABE , Koji HASEGAWA
IPC分类号： B23K20/12
CPC分类号： B23K20/1255
摘要： A friction stir welding tool member including: a shoulder portion; and a probe portion. A helical concavo-convex portion including a ridge and a valley is provided on a side peripheral surface of the probe portion. In a cross-section passing through a rotation axis of the probe portion, a differential rate of areas of valley parts adjacent along an axis parallel to the rotation axis out of the valley is within a range of 5% or more and 30% or less. A difference between pitches of ridge parts adjacent along the axis parallel to the rotation axis out of the ridge is preferably within a range of 0.01 mm or more and 0.2 mm or less. A difference between depths of valley parts adjacent along the axis parallel to the rotation axis out of the valley is preferably within a range of 0.01 mm or more and 0.1 mm or less.
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公开(公告)号：US20230080570A1
公开(公告)日：2023-03-16
申请号：US17990031
申请日：2022-11-18
发明人： Katsuyuki AOKI , Kai FUNAKI , Takayuki FUKASAWA , Shoya SANO
IPC分类号： C04B35/587 , C04B35/626 , C04B35/64
摘要： A silicon nitride sintered body includes at least one black portion with a major axis of 10 μm or more in a field of view with a unit area of 5 mm×5 mm, when observing an arbitrary cross-section of the silicon nitride sintered body using a metallurgical microscope. A major axis of the black portion is Preferably 500 μm or less. The number of the black portion within the field of view with a unit area of 5 mm×5 mm is preferably 2 or more and 10 or less. A segregation portion of Fe is preferably included in the black portion.
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公开(公告)号：US20210261467A1
公开(公告)日：2021-08-26
申请号：US17236580
申请日：2021-04-21
发明人： Kai FUNAKI , Katsuyuki AOKI , Haruhiko YAMAGUTI , Minoru TAKAO , Yutaka ABE
IPC分类号： C04B35/587 , C04B35/593 , C04B35/63 , C04B35/626 , C04B35/645 , F16C19/02 , H02K5/173 , H02K7/08 , H02K11/33
摘要： The sliding member according to the embodiment includes a silicon nitride sintered body that includes silicon nitride crystal grains and a grain boundary phase, in which a percentage of a number of the silicon nitride crystal grains including dislocation defect portions inside the silicon nitride crystal grains among any 50 of the silicon nitride crystal grains having completely visible contours in a 50 μm×50 μm observation region of any cross section or surface of the silicon nitride sintered body is not less than 0% and not more than 10%. The percentage is more preferably not less than 0% and not more than 3%.
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4.发明公开公开(公告)号：US20230391677A1
公开(公告)日：2023-12-07
申请号：US18451438
申请日：2023-08-17
发明人： Shoya SANO , Katsuyuki AOKI , Kai FUNAKI , Kazuya OOKUBO
IPC分类号： C04B35/587 , C04B35/63 , C04B35/626 , C04B35/64 , F16C19/06
CPC分类号： C04B35/587 , C04B35/6303 , C04B35/6261 , C04B35/64 , F16C19/06 , C04B2235/3873 , C04B2235/3225 , C04B2235/3217 , C04B2235/3232 , C04B2235/3865 , C04B2235/3258 , C04B2235/85 , C04B2235/96 , F16C2206/60
摘要： According to an embodiment, a silicon nitride sintered body includes silicon nitride crystal grains and a grain boundary phase. In a case where Raman spectroscopy of a 20 μm×20 μm region at any cross section of the silicon nitride sintered body is performed, seven or more peaks are detected within a range of not less than 400 cm−1 and not more than 1200 cm−1, and the most intense peak of the seven or more peaks is not in a range of not less than 515 cm−1 and not more than 525 cm−1. Favorably, at least three of the seven or more peaks exist within a range of not less than 530 cm−1 and not more than 830 cm−1. It is favorable for at least one of the seven or more peaks to be within a range of not less than 440 cm−1 and not more than 460 cm−1.
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5.发明申请公开(公告)号：US20170297141A1
公开(公告)日：2017-10-19
申请号：US15509592
申请日：2015-08-28
发明人： Isao IKEDA , Kai FUNAKI , Yutaka ABE
IPC分类号： B23K20/12 , B28B3/00 , C04B35/63 , C04B35/645 , C04B35/587 , C04B35/626
摘要： The present invention provides a welding tool member for friction stir welding comprising a silicon nitride sintered body, wherein the silicon nitride sintered body includes an additive component other than silicon nitride in a content of 15% by mass or less, and the additive component includes three or more elements selected from Y, Al, Mg, Si, Ti, Hf, Mo and C. It is preferable that the content of the additive component is 3% by mass or more and 12.5% by mass or less. It is also preferable that the additive component includes four or more elements selected from Y, Al, Mg, Si, Ti, Hf, Mo and C. Due to above structure, there can be provided a welding tool member for friction stir welding having a high durability.
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6.发明公开公开(公告)号：US20240191753A1
公开(公告)日：2024-06-13
申请号：US18582824
申请日：2024-02-21
发明人： Kai FUNAKI , Hideki SATO
IPC分类号： F16C33/32
CPC分类号： F16C33/32 , F16C2206/44 , F16C2206/48 , F16C2206/56 , F16C2206/60 , F16C2223/06
摘要： A ceramic ball material according to an embodiment including: a spherical portion; and a band-shaped portion formed over a circumference of a surface of the spherical portion. The ceramic ball material has a ratio Rtb/Rts of 1.0 or more, where Rtb denotes a maximum cross-sectional height of a roughness profile on an outer peripheral surface of the band-shaped portion; and Rts denotes a maximum cross-sectional height of roughness on an outer peripheral surface of the spherical portion.
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7.发明公开公开(公告)号：US20230332644A1
公开(公告)日：2023-10-19
申请号：US18213444
申请日：2023-06-23
发明人： Kai FUNAKI , Shoya SANO
IPC分类号： F16C33/32 , B28B3/02 , C04B35/645
CPC分类号： F16C33/32 , B28B3/02 , C04B35/645 , C04B2235/94 , C04B2235/96 , F16C2206/40
摘要： A ceramic ball material according to the present embodiment includes a spherical portion, and a band-shaped portion formed over a circumference of a surface of the spherical portion. The band-shaped portion has a width in a range of 0.5 mm or more and 4.0 mm or less, both shoulders of which are provided with an R section having a radius of curvature of 0.02 mm or more. Any one of aluminum oxide, silicon nitride, boron nitride, and zirconium oxide is used as the ceramic.
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公开(公告)号：US20240199495A1
公开(公告)日：2024-06-20
申请号：US18588276
申请日：2024-02-27
发明人： Kai FUNAKI , Katsuhiko YAMADA , Shoya SANO
IPC分类号： C04B35/584
CPC分类号： C04B35/584 , C04B2235/3873 , C04B2235/94
摘要： A ceramic ball material according to an embodiment including: a spherical portion; and a band-shaped portion formed in a band shape. When C denotes circularity of the band-shaped portion as observed from a height direction thereof, the circularity C is in a range of more than 0% and 2.5% or more.
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公开(公告)号：US20240149546A1
公开(公告)日：2024-05-09
申请号：US18417809
申请日：2024-01-19
发明人： Kai FUNAKI , Yoshiyuki FUKUDA , Koji HASEGAWA
CPC分类号： B30B11/001 , B30B15/024
摘要： A rubber mold according to an embodiment is for CIP processing of a green compact with a plate shape. The rubber mold includes one or more approximately columnar hole sections are provided on at least one or more bottom surfaces. Further, when a diameter of an opening of the hole section is denoted by a and a maximum depth of the hole section is denoted by b, a/b
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公开(公告)号：US20230093291A1
公开(公告)日：2023-03-23
申请号：US18057847
申请日：2022-11-22
发明人： Kai FUNAKI
IPC分类号： C04B35/587 , C04B35/626 , C04B35/64
摘要： A silicon nitride sintered body includes a silicon nitride crystal grains and grain boundary phases. Further, when D stands for width of the silicon nitride sintered body before being subjected to surface processing, relations between an average grain diameter dA and an average aspect ratio rA of the silicon nitride crystal grain in a first region from an outermost surface to a depth of 0 to 0.01D and an average grain diameter dB and an average aspect ratio rB of the silicon nitride crystal grain in a second region inside the first region satisfy the inequalities:
0.8≤ dA/dB≤ 1.2; and
0.8≤ rA/rB≤ 1.2.
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