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Patent Searching and Data


Title:
CUTTING TOOL COATED WITH VAPOR PHASE SYNTHETIC DIAMOND AND ITS MANUFACTURE
Document Type and Number:
Japanese Patent JP3191878
Kind Code:
B2
Abstract:

PURPOSE: To provide a gaseous phase synthetic diamond cutting too excellent in peeling resistance and its manufacturing method.
CONSTITUTION: A gaseous phase synthetic diamond film is formed on the surface of a Co shortage layer of a WC group cemented carbide base body covered with the Co shortage layer with thickness within a range of 5μm from the surface and whose Co content is 1 weight percent, or less and a Co concentration gradient layer with a Co concentration gradient which Co concentration gradually increases from the Co shortage layer toward the inside and whose thickness is less than 10μm. A normal WC group cemented carbide cutting tool is secondary-sintered at a temperature of liquid phase appearance temperature or higher and less than 1500°C in an inactive gas atmosphere of 5-1000 atmospheric pressure, thereafter, subjected to ultrasonic polishing at a temperature capable of bumping and then coated with gaseous phase synthetic diamond.


Inventors:
Okamura, Toshihiko
Application Number:
JP1991000049099
Publication Date:
July 23, 2001
Filing Date:
February 21, 1991
Export Citation:
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Assignee:
MITSUBISHI MATERIALS CORP
International Classes:
B23B27/14; B23P15/28; C22C1/05; C23C16/02; C23C16/26; C23C16/27; C30B25/02; C30B29/04; H04M3/22; H04Q3/00; G06F11/34; (IPC1-7): B23B27/14; B23P15/28; C22C1/05; C23C16/02; C23C16/26; C30B25/02; C30B29/04
Attorney, Agent or Firm:
富田 和夫 (外1名)