CUTTING TOOL MADE OF HARD SINTERED MATERIAL COATED WITH ARTIFICIAL DIAMOND, EXCELLENT IN CHIPPING RESISTANCE

Title:

CUTTING TOOL MADE OF HARD SINTERED MATERIAL COATED WITH ARTIFICIAL DIAMOND, EXCELLENT IN CHIPPING RESISTANCE

Document Type and Number:

Japanese Patent JP3353705

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To provide a cutting tool made of hard sintered material coated with artificial diamond, excellent in chipping resistance.
SOLUTION: This cutting tool is constituted by forming an artificial diamond film on the surface of a base material of hard sintered material consisting of any of a base material of tungsten-carbide-base cemented carbide, a base material of titanium carbonitride cermet, and a base material of silicon nitride ceramics to 5-200 μm average layer thickness. At this time, the artificial diamond film has, from the observation on the longitudinal section under a scanning electron microscope, a mixed structure of a laminated grain where a thin diamond crystal layer and a thin amorphous carbon layer are alternately laminated at fine pitches to form a striped pattern and a diamond crystal grain, and the laminated grain comprises 10-70 area % of the mixed structure.

Inventors:

Hiromichi Yoshikawa

Application Number:

JP15574898A

Publication Date:

December 03, 2002

Filing Date:

June 04, 1998

Export Citation:

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Assignee:

Mitsubishi Materials Corporation

International Classes:

B23B27/14; C04B41/89; C23C16/26; C23C16/27; C30B29/04; (IPC1-7): C23C16/27; B23B27/14; C30B29/04

Domestic Patent References:

JP62241898A
JP6297207A
JP6346241A

Attorney, Agent or Firm:

Kazuo Tomita (1 person outside)

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