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US 10,118,229 B2Granted
Coated tool
AssigneeKYOCERA Corporation
InventorMasahiro Waki
Life of this patent
Estimating the term…
Abstract
In an embodiment, a coated tool is disclosed. The coated tool includes a base material, a first layer on the base material, and a second layer coated on the first layer. The first layer contains diamond crystals therein and has a first mean crystal size. The second layer contains diamond crystals therein and has a second mean crystal size that is smaller than the first mean crystal size. The first and the second layers contain hydrogen, and have a first hydrogen content and a second hydrogen content respectively. The second hydrogen content is larger than the first hydrogen content.
Claims9
A coated tool comprising:
- a base material;
- a first layer located on the base material, containing diamond crystals with a first mean crystal size;
- and
- a second layer is an outermost layer located on the first layer, containing diamond crystals with a second mean crystal size smaller than the first mean crystal size, and
- wherein the first layer contains hydrogen with a first hydrogen content that is greater than zero, and the second layer contains hydrogen with a second hydrogen content larger than the first hydrogen content,
- wherein residual stress in an intermediate position of a thickness of the first layer is compressive stress, and residual stress in an intermediate position of a thickness of the second layer is extension stress.
3 more elements
Dependencies are inferred from the claim text.