Cutting tool made of surface-coated cemented carbide with hard coating layer exhibiting excellent wear resistance in high speed cutting operation of high hardness steel
US7510761B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2006 |
| Grant date | Mar 31, 2009 |
| Priority date | — |
| Expiry date | Mar 9, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A cutting tool made of surface-coated cemented carbide having the hard coating layer formed on the surface of a cemented carbide substrate, wherein the hard coating layer has a top layer and a bottom layer, the top layer includes a structure having the thin layer A and the thin layer B being stacked alternately, with the thin layer A having the composition of [Ti1−(A+B)AlASiB]N (A is in a range from 0.01 to 0.06 and B is in a range from 0.25 to 0.35 in an atomic ratio) and the thin layer B having the composition of [Ti1−(C+D)AlCSiD]N (C is in a range from 0.30 to 0.45 and D is in a range from 0.10 to 0.15), and the bottom layer comprises single phase structure having the composition of [Ti1−(E+F)AlESiF]N (E is in a range from 0.50 to 0.60 and F is in a range from 0.01 to 0.09).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.