发明授权
- 专利标题: Cutting tool
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申请号: US16981099申请日: 2019-12-12
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公开(公告)号: US10967433B2公开(公告)日: 2021-04-06
- 发明人: Susumu Okuno , Shinya Imamura , Yuki Rikiso , Yasuki Kido , Fumiyoshi Kobayashi
- 申请人: SUMITOMO ELECTRIC HARDMETAL CORP.
- 申请人地址: JP Itami
- 专利权人: SUMITOMO ELECTRIC HARDMETAL CORP.
- 当前专利权人: SUMITOMO ELECTRIC HARDMETAL CORP.
- 当前专利权人地址: JP Itami
- 代理机构: Faegre Drinker Biddle & Reath LLP
- 优先权: JPJP2019-027258 20190219
- 国际申请: PCT/JP2019/048724 WO 20191212
- 国际公布: WO2020/170572 WO 20200827
- 主分类号: B24D3/02
- IPC分类号: B24D3/02 ; B23B27/14 ; B23C5/16 ; B24D3/00 ; B24D11/00 ; B24D18/00 ; C09K3/14
摘要:
A cutting tool comprises a substrate and a coating that coats the substrate, the coating including an α-alumina layer, the α-alumina layer including crystal grains of α-alumina, the α-alumina layer including a lower portion and an upper portion, the upper portion being occupied in area at a ratio of 50% or more by crystal grains of α-alumina having (006) plane with a normal thereto having a direction within ±15° with respect to a direction of a normal to the second interface, the lower portion being occupied in area at a ratio of 5% or more and less than 50% by crystal grains of α-alumina having (012) plane, (104) plane, (110) plane, (113) plane, (116) plane, (300) plane, (214) plane and (006) plane each with a normal thereto having a direction within ±15° with respect to the direction of the normal to the second interface.
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