Surface-coated machining tools
AssigneeSumitomo Electric Industries, Ltd.
InventorsHaruyo Fukui, Tatsuro Fukuda
Life of this patent
Estimating the term…
Abstract
Abstract of Disclosure Surface-coated machining tools in particular utilized in routing, slitting and drilling processes on printed circuit boards onto which integrated circuits and various electronic parts are populated. A cemented-carbide base material containing tungsten carbide and cobalt, with the cobalt inclusion amount being 4 weight % or more and 12 weight % or less, is furnished. A compound thin film made up of a combination of one or more elements selected from the group titanium, chromium, vanadium, silicon and aluminum, and one or more selected from carbon and nitrogen, is coated over the cemented-carbide base material. The compound thin film is coated in at least a single layer.
Claims16
What is claimed is:
- 1. A surface-coated machining tool, comprising:
- a cemented-carbide base material containing tungsten carbide and cobalt, with the cobalt inclusion amount being 4 weight % or more and 12 weight % or less;
- and
- coated over said cemented-carbide base material, a compound thin film made up of a combination of one or more elements selected from the group titanium, chromium, vanadium, silicon and aluminum, and one or more elements selected from carbon and nitrogen;
- wherein
- said compound thin film is coated in at least a single layer.
A surface-coated machining tool, comprising:
- a cemented-carbide base material containing tungsten carbide and cobalt, with the cobalt inclusion amount being 4 weight % or more and 12 weight % or less;
- and
- a hard carbon thin film made up essentially of carbon atoms only, coated over said cemented-carbide base material by a physical vapor deposition method in which graphite is made a raw material;
- wherein
- said hard carbon thin film is coated in at least a single layer.
The surface-coated machining tool set forth in claim 8, wherein said hard carbon thin film is in surface roughness adjusted to be 0.01 μm or more and 0.5 μm or less by indication Ra.
Dependencies are inferred from the claim text.