Cutting tool and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-11020805-B2
Application number	US-201716328229-A
Country	US
Kind code	B2
Filing date	May 25, 2017
Priority date	Aug 25, 2016
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

A cutting tool includes a base material. The base material is a cemented carbide or a cermet. A surface of the base material includes a rake face, a flank face, and a cutting edge face connecting the rake face to the flank face. The base material has an oxygen concentration of less than or equal to 1 at. % at a depth position of 0.4 μm from the cutting edge face.

First claim

The invention claimed is:

1. A cutting tool comprising a base material,
the base material being a cemented carbide or a cermet,
a surface of the base material including a rake face, a flank face, and a cutting edge face connecting the rake face to the flank face,
the base material having an oxygen concentration of less than or equal to 1 at. % at a depth position of 0.4 μm from the cutting edge face.

2. The cutting tool according to claim 1 , wherein the base material has an oxygen concentration of less than or equal to 10 at. % at a depth position of 0.2 μm from the cutting edge face.

3. The cutting tool according to claim 1 , wherein the cutting edge face of the base material has a strain of less than or equal to 0.07.

4. The cutting tool according to claim 1 , further comprising a coating formed on the base material.

5. The cutting tool according to claim 4 , wherein the coating includes a compound layer made from:
at least one kind of first element selected from the group consisting of Group IV elements, Group V elements, and Group VI elements in the periodic table, Al, and Si; and
at least one kind of second element selected from the group consisting of B, C, N, and O.

6. A method for manufacturing a cutting tool according to claim 1 , the method comprising:
preparing a base material precursor; and
producing a base material by machining a surface of the base material precursor,
the machining being one of
a first grinding process of alternately repeating wet grinding and dry grinding;
a second grinding process of performing low-feed low-depth-of-cut wet grinding, or
a third grinding process of performing dry grinding.

7. The method for manufacturing a cutting tool according to claim 6 , further comprising forming a coating on a surface of the base material.

Assignees

• Sumitomo Electric Hardmetal Corp

Inventors

• Imamura Shinya
• Kanaoka Hideaki
• Paseuth Anongsack
• Ono Satoshi
• Yoshimura Kouhei

Classifications

• C23C14/0641 Primary

  Nitrides (C23C14/0617 takes precedence) · CPC title

• B23D77/00

  Reaming tools · CPC title

• B23C5/06

  Face-milling cutters, i.e. having only or primarily a substantially flat cutting surface · CPC title

• B23G5/06

  Taps (chucks therefor B23B31/00) · CPC title

• B23B51/00

  Tools for drilling machines · CPC title