2003 Fiscal Year Final Research Report Summary
The development of Nanocrystalline cBN Abrasives and Their Application to Grinding
| Project/Area Number |
13450052
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
機械工作・生産工学
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| Research Institution | Utsunomiya University |
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Principal Investigator |
ICHIDA Yoshio Utsunomiya University, Faculty of engineering, Professor, 工学部, 教授 (50091939)
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| Co-Investigator(Kenkyū-buntansha) |
SATO Ryunosuke Utsunomiya University, Faculty of engineering, Assistant, 工学部, 助手 (20312861)
MORIMOTO Yoshitaka Utsunomiya University, Faculty of engineering, Assistant professor, 工学部, 助教授 (00290734)
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| Project Period (FY) |
2001 – 2003
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| Keywords | New Polycrystalline CBN Abrasive / Direct Transformation / CBN Grinding Wheel / Fracture Strength / Grinding ratio / Grinding Force / Surface Roughness / Grinding Performance |
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| Research Abstract |
A new type of polycrystalline CBN grit has been developed by direct transformation at high temperature and pressure from hBN of high purity which was produced using a chemical vapor deposition process. This new polycrystalline CBN(CBN-U) grit possesses an average primary crystal grain diameter less than 1 μm and its fracture strength is around 1.5 times higher than conventional polycrystalline CBN(CBN-55) grit. In grinding high-speed tool steel, the grinding ratio of the wheel containing CBN-U grits is 7〜9 times higher than that of the wheel containing CBN-55 grits. The estimated tool Life of the CBN-U wheel, based on the roughness of the finished surface, is much longer than that of the CBN-55 wheel.
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