Cutting tool
US10086437B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 2014 |
| Grant date | Oct 2, 2018 |
| Priority date | — |
| Expiry date | May 28, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T407/24
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Problem: To provide a cutting tool formed from a silicon nitride-based sintered body having high fracture resistance and having residual stress of a rake face and a flank face in an appropriate range.Solution: A cutting tool (1) formed from a silicon nitride-based sintered body containing not less than 50 volume % silicon nitride-based phase and from 10 to 30 volume % titanium nitride phase, uses an intersection ridge portion of a rake face (2) and a flank face (3) as a cutting edge (4), has a residual stress applied to the titanium nitride phase that is tensile stress, and is such that the tensile stress applied to the titanium nitride phase in the rake face (2) is greater than the tensile stress applied to the titanium nitride phase in the flank face (3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.