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公开(公告)号：EP3950194A1
公开(公告)日：2022-02-09
申请号：EP20778357.2
申请日：2020-03-25
摘要： The present invention provides a base material (1) for a hard sintered material having a multi-stage columnar shape having a central axis (C) and extending in an axial direction of the central axis (C). The base material (1) for the hard sintered material includes a smaller-diameter portion (2), a larger-diameter portion (3) having an outer diameter larger than an outer diameter of the smaller-diameter portion (2), a base material end surface (4) located between a one end portion in the axial direction of an outer peripheral surface of the larger-diameter portion (3) and the other end portion in the axial direction of the smaller-diameter portion (2), and facing toward the one end portion in the axial direction, and a first inclined portion (6) disposed in at least a portion in a circumferential direction of an annular corner portion (5) to which an outer peripheral surface of the larger-diameter portion (3) and the base material end surface (4) are connected. The first inclined portion (6) is located inward in a radial direction toward the one end portion in the axial direction.
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公开(公告)号：EP3950184A1
公开(公告)日：2022-02-09
申请号：EP20777061.1
申请日：2020-03-27
摘要： There is provided a base material for a hard sintered body including a pillar portion having a central axis and extending in an axial direction of the central axis. The pillar portion has a first outer peripheral portion disposed in an outer peripheral portion of the pillar portion, and forming a part of the outer peripheral portion, a second outer peripheral portion disposed in the outer peripheral portion of the pillar portion, and forming a part of the outer peripheral portion, and a protruding stripe portion of the base material located in a connection portion between the first outer peripheral portion and the second outer peripheral portion which are connected to each other in a cross-sectional view perpendicular to the central axis, and extending in the axial direction. In the cross-sectional view, one side portion of the first outer peripheral portion extending in a circumferential direction or a radial direction is located inside the other side portion in the radial direction. In the cross-sectional view, one side portion of the second outer peripheral portion extending in the circumferential direction or the radial direction is located outside the other side portion in the radial direction. The protruding stripe portion of the base material is located in a connection portion between the other side portion of the first outer peripheral portion and one side portion of the second outer peripheral portion, and protrudes outward in the radial direction.
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