| 发明名称 |
CUBIC BORON NITRIDE POLYCRYSTAL, CUTTING TOOL, WEAR-RESISTANT TOOL, GRINDING TOOL, AND METHOD OF PRODUCING CUBIC BORON NITRIDE POLYCRYSTAL |
| 摘要 |
A cubic boron nitride polycrystal includes cubic boron nitride, the cubic boron nitride having an average grain size of not more than 150 nm, a ratio b/a being not more than 0.085 in measurement of Knoop hardness at 23° C.±5° C. under a test load of 4.9 N, the ratio b/a being a ratio between a length a of a longer diagonal line and a length b of a shorter diagonal line of a Knoop indentation. |
| 申请公布号 |
US2015298290(A1) |
申请公布日期 |
2015.10.22 |
| 申请号 |
US201514677368 |
申请日期 |
2015.04.02 |
| 申请人 |
Sumitomo Electric Industries, Ltd. |
发明人 |
ISHIDA Yuh;YAMAMOTO Katsuko;SUMIYA Hitoshi |
| 分类号 |
B24D3/00;C22C26/00;B24D18/00 |
主分类号 |
B24D3/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A cubic boron nitride polycrystal comprising cubic boron nitride,
said cubic boron nitride having an average grain size of not more than 150 nm, a ratio b/a being not more than 0.085 in measurement of Knoop hardness at 23° C.±5° C. under a test load of 4.9 N, said ratio b/a being a ratio between a length a of a longer diagonal line and a length b of a shorter diagonal line of a Knoop indentation. |
| 地址 |
Osaka-shi JP |
