Cemented carbide insert and method of making same
US6326093A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2000 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Sep 6, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention relates to a coated cemented carbide cutting tool particularly for turning applications with high toughness demands, of stainless steels of different compositions and microstructures, and of low and medium alloyed non-stainless steels. The cemented carbide is WC-Co based with a composition of 9-12 wt % Co, 0.2-2.0 wt % cubic carbides from elements from group IVa, Va or VIa of the periodic table and balance WC with a grain size of 1.5-2 .mu.m. The binder phase is W-alloyed with a CW-ratio in the range of 0.77-0.95. The coating includes a multilayered structure of the composition (Ti.sub.x A1.sub.1-x,)N in which x varies repeatedly between the two ranges 0.45<x<0.55 and 0.70<x<0.80, adding up to a total thickness of 2-9 .mu.m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.