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    CUBIC BORON NITRIDE SINTERED BODY
    1.
    发明公开
    CUBIC BORON NITRIDE SINTERED BODY 审中-公开

    公开(公告)号：EP4001241A1

    公开(公告)日：2022-05-25

    申请号：EP20839852.9

    申请日：2020-07-17

    申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD. ,  Sumitomo Electric Hardmetal Corp.

    发明人： AMEMIYA, Mayu ,  ISHII, Akito ,  OKAMURA, Katsumi ,  MOROGUCHI, Hironari ,  KUKINO, Satoru

    IPC分类号： C04B35/5831 ,  C04B35/5835

    摘要： A cubic boron nitride sintered material includes: more than or equal to 20 volume% and less than or equal to 80 volume% of cubic boron nitride grains; and more than or equal to 20 volume% and less than or equal to 80 volume% of a binder phase, wherein the binder phase includes first binder grains and second binder grains, each of the first binder grains and the second binder grains includes one compound composed of titanium, at least one first metal element selected from a group consisting of zirconium, hafnium, a group 5 element, a group 6 element in a periodic table, and aluminum, and one or both of nitrogen and carbon, in each of the first binder grains, a ratio of the number of atoms of the first metal element to a total of the number of atoms of the titanium and the number of atoms of the first metal element is more than or equal to 0.01% and less than 10%, in each of the second binder grains, this ratio is more than or equal to 10% and less than or equal to 80%, and in an X-ray diffraction spectrum of the cubic boron nitride sintered material, one or both of conditions 1 and 2 are satisfied.

    COMPOSITE SINTERED MATERIAL
    2.
    发明公开
    COMPOSITE SINTERED MATERIAL 审中-公开

    公开(公告)号：EP3530767A1

    公开(公告)日：2019-08-28

    申请号：EP17861577.9

    申请日：2017-10-10

    申请人： Sumitomo Electric Industries, Ltd. ,  Sumitomo Electric Hardmetal Corp.

    发明人： OKAMURA, Katsumi ,  WATANOBE, Naoki ,  ISHII, Akito ,  HARADA, Takashi ,  KUKINO, Satoru ,  HIGASHI, Taisuke

    IPC分类号： C22C26/00 ,  C22C1/05 ,  B22F7/00

    摘要： A composite sintered material includes: a plurality of diamond grains having an average grain size of less than or equal to 10 µm; a plurality of cubic boron nitride grains having an average grain size of less than or equal to 2 µm; and a remainder of a binder phase, wherein at least parts of adjacent diamond grains are bound to one another, the binder phase includes cobalt, in the composite sintered material, a content of the diamond grains is more than or equal to 30 volume % and less than or equal to 94 volume %, a content of the cubic boron nitride grains is more than or equal to 3 volume % and less than or equal to 40 volume %, and a content of the cobalt is more than or equal to 3 volume % and less than or equal to 30 volume %.

    CUBIC BORON NITRIDE SINTERED COMPACT
    4.
    发明公开
    CUBIC BORON NITRIDE SINTERED COMPACT 审中-公开

    公开(公告)号：EP4000779A1

    公开(公告)日：2022-05-25

    申请号：EP20841409.4

    申请日：2020-07-17

    申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD. ,  Sumitomo Electric Hardmetal Corp.

    发明人： HAMA, Hisaya ,  OKAMURA, Katsumi ,  ISHII, Akito ,  KUKINO, Satoru

    IPC分类号： B23B27/14 ,  C04B35/5831

    摘要： A cubic boron nitride sintered material includes: more than or equal to 50 volume% and less than 80 volume% of cubic boron nitride grains; and more than 20 volume% and less than or equal to 50 volume% of a binder phase, wherein the binder phase includes at least one selected from a group consisting of a compound composed of at least one element selected from a group consisting of a group 4 element, a group 5 element, a group 6 element in a periodic table, and aluminum, and at least one element selected from a group consisting of nitrogen, carbon, boron, and oxygen, and a solid solution originated from the compound, and when an oxygen content is measured in a direction perpendicular to an interface between cubic boron nitride grains using TEM-EDX, a first region having an oxygen content larger than an average value of an oxygen content of a cubic boron nitride grain exists, the interface exists in the first region, and a length of the first region along the direction perpendicular to the interface is more than or equal to 0.1 nm and less than or equal to 10 nm.

    SINTERED BODY AND METHOD FOR PRODUCING SAME
    5.
    发明公开
    SINTERED BODY AND METHOD FOR PRODUCING SAME 审中-公开

    公开(公告)号：EP3632878A1

    公开(公告)日：2020-04-08

    申请号：EP18805905.9

    申请日：2018-02-15

    申请人： Sumitomo Electric Industries, Ltd.

    发明人： ISHII, Akito ,  OKAMURA, Katsumi

    IPC分类号： C04B35/5835 ,  B23B27/14 ,  B23B27/18 ,  B23B27/20 ,  C04B35/5831 ,  C04B35/628 ,  C04B35/645

    摘要： A sintered material includes a first phase and a second phase, wherein the first phase is composed of cubic boron nitride particles, the second phase is composed of a first material that is partially stabilized ZrO 2 in which Al 2 O 3 is dispersed in both or one of a crystal grain boundary and a crystal grain, the second phase is in contact with at least a portion of a surface of the first phase, and the following relational expressions are satisfied when more than or equal to two cubic boron nitride particles adjacent to and in direct contact with each other among the cubic boron nitride particles are defined as a contact body, Di represents a length of an entire perimeter of the contact body, n represents the number of contact locations at which the cubic boron nitride particles are in direct contact with each other, d k represents a length of each of the contact locations, and ∑d k (where k = 1 to n) represents a total length of the contact locations: Dii=Di+(2×∑d k (where k = 1 to n)); and [(Dii-Di)/Dii]×100≤50.

    CUBIC BORON NITRIDE SINTERED BODY
    9.
    发明公开
    CUBIC BORON NITRIDE SINTERED BODY 审中-公开

    公开(公告)号：EP4242334A1

    公开(公告)日：2023-09-13

    申请号：EP20960760.5

    申请日：2020-11-04

    申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD. ,  Sumitomo Electric Hardmetal Corp.

    发明人： ISHII, Akito ,  OKAMURA, Katsumi ,  HAMA, Hisaya ,  ISHIDA, Yuh ,  NAGASHIMA, Issei

    IPC分类号： C22C29/16

    摘要： A cubic boron nitride sintered material includes: more than or equal to 80 volume% and less than or equal to 96 volume% of cubic boron nitride grains; and a binder, wherein the binder includes tungsten carbide, cobalt, and an aluminum compound, and Ha/Hb≥0.40 is satisfied, where Hb represents a hardness of the cubic boron nitride sintered material and Ha represents a hardness of the cubic boron nitride sintered material after performing acid treatment onto the cubic boron nitride sintered material to substantially remove the binder in the cubic boron nitride sintered material.

    CUBIC BORON NITRIDE SINTERED COMPACT AND METHOD FOR MANUFACTURING SAME
    10.
    发明公开
    CUBIC BORON NITRIDE SINTERED COMPACT AND METHOD FOR MANUFACTURING SAME 审中-公开

    公开(公告)号：EP4000778A1

    公开(公告)日：2022-05-25

    申请号：EP20841032.4

    申请日：2020-07-17

    申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD. ,  Sumitomo Electric Hardmetal Corp.

    发明人： HAMA, Hisaya ,  OKAMURA, Katsumi ,  ISHII, Akito ,  KUKINO, Satoru

    IPC分类号： B23B27/14 ,  C04B35/5831

    摘要： A cubic boron nitride sintered material includes: more than or equal to 20 volume% and less than 80 volume% of cubic boron nitride grains; and more than 20 volume% and less than or equal to 80 volume% of a binder phase, wherein the binder phase includes at least one selected from a group consisting of a compound composed of at least one element selected from a group consisting of a group 4 element, a group 5 element, a group 6 element in a periodic table, and aluminum, and at least one element selected from a group consisting of nitrogen, carbon, boron, and oxygen, and a solid solution originated from the compound, and when a carbon content is measured from a cubic boron nitride grain into the binder phase in a direction perpendicular to an interface between the cubic boron nitride grain and the binder phase using TEM-EDX, a first region having a carbon content larger than an average value of a carbon content of the binder phase exists, the interface exists in the first region, and a length of the first region is more than or equal to 0.1 nm and less than or equal to 10 nm.