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公开(公告)号：US20240189920A1
公开(公告)日：2024-06-13
申请号：US18279397
申请日：2021-06-02
发明人： Daiji TABAYASHI , Haruyo FUKUI , Shigeaki UEMURA
CPC分类号： B23B27/148 , C23C14/0605 , C23C14/325 , C23C14/588 , B23B2228/105
摘要： Provided is a cutting tool comprising a base material and a film arranged on the base material, in which the film includes a hard carbon film on the outermost surface thereof, the hard carbon film includes a first region, the first region is a region sandwiched between the surface of the hard carbon film and an imaginary plane P at a distance of 40 nm from the surface to the base material side, and the sp2 component amount C2 and the sp3 component amount C3 in the first region exhibit a relationship of the following formula 1:
{C2/(C2+C3)}×100≤2.0 formula 1.-
公开(公告)号：US20230150035A1
公开(公告)日：2023-05-18
申请号：US17793036
申请日：2020-04-24
发明人： Haruyo FUKUI , Daiji TABAYASHI , Yoshihiro SAITO , Kazuya TOKUDA , Yoshiharu UTSUMI , Hajime TAKAMATSU
CPC分类号： B23B27/14 , C22C29/08 , B23B2228/105 , B23B2226/125
摘要： Provided is a cutting tool that can have a long tool life even when used to cut soft metals in particular. The cutting tool comprises a base body and a hard carbon film arranged on the base body, the hard carbon film includes an amorphous phase and a graphite phase, the density of the hard carbon film is no less than 2.5 g/cm3 and no more than 3.5 g/cm3, the degree of crystallinity of the hard carbon film is no more than 6.5%, and the average coordination number of the amorphous phase is no less than 2.5 and no more than 4.
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公开(公告)号：US20230068515A1
公开(公告)日：2023-03-02
申请号：US17793056
申请日：2020-04-24
发明人： Daiji TABAYASHI , Haruyo FUKUI , Yoshihiro SAITO , Kazuya TOKUDA , Yoshiharu UTSUMI , Hajime TAKAMATSU
摘要： Provided is a cutting tool comprising a base body and a hard carbon film arranged on the base body, in which the hard carbon film includes an amorphous phase and a graphite phase, the degree of crystallinity of the hard carbon film is no more than 6.5%, and the degree of orientation of the graphite phase is no more than 6.
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公开(公告)号：US20230123968A1
公开(公告)日：2023-04-20
申请号：US17802536
申请日：2020-04-24
摘要： Provided is a cutting tool comprising a base body and a hard carbon film arranged on the base body, in which, when the cross section of the hard carbon film is observed using a high angle annular dark field scanning transmission electron microscope, the area proportion of black regions with an equivalent circle diameter of 10 nm or more is 0.7% or less, and the hard carbon film has a hydrogen content of 5 atom% or less.
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公开(公告)号：US20210079504A1
公开(公告)日：2021-03-18
申请号：US16959688
申请日：2018-07-31
发明人： Yasuki KIDO , Daiji TABAYASHI , Shinya IMAMURA
摘要： A cemented carbide comprises a first hard phase comprising tungsten carbide particles and a binder phase including Co and Cr. In any surface or any cross section of the cemented carbide, a region in which there is a distance X of 5 nm or less between surfaces respectively of tungsten carbide particles adjacent to each other, with the surfaces facing each other along a length L of 100 nm or more, is referred to as a WC/WC interface, and a ratio C(R)/C(C) has an average value of 0.17 or more, where C(R) and C(C) represent peak values of atomic percentages of Cr and Co, respectively, at a WC/WC interface having a distance X of 1 nm or more and 5 nm or less and having therein an atomic percentage of Co higher than an average value of atomic percentages of Co in the tungsten carbide particles+2 at %.
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公开(公告)号：US20240198431A1
公开(公告)日：2024-06-20
申请号：US18286558
申请日：2022-02-09
发明人： Haruyo FUKUI , Daiji TABAYASHI , Momoko IIDA , Taisei TANAKA
CPC分类号： B23B27/148 , C23C14/0635 , C23C14/0641 , C23C14/0664 , C23C14/067 , C23C14/0676 , C23C14/325 , B23B2228/105
摘要： A cutting tool comprising a base material and a coating disposed on the base material, wherein the coating comprises a first layer, the first layer consists of a MoC1-x layer formed from a compound represented by MoC1-x or a TaC1-y layer formed from a compound represented by TaC1-y, the compound represented by MoC1-x consists of a hexagonal crystal structure, the x is 0.40 or more and 0.60 or less, the compound represented by TaC1-y comprises 95% by mass or more of a hexagonal crystal structure, and the y is 0:40 or more and 0.60 or less.
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