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Title:
HIGH HARDNESS SINTERED BODY FOR TOOL AND ITS MANUFACTURE
Document Type and Number:
Japanese Patent JPS5896848
Kind Code:
A
Abstract:

PURPOSE: To obtain a high-hardness sintered body for a tool with superior wear and welding resistances by mixing a specified percentage of diamond particles having a specified particle size with a specified percentage of a binder composed of hyper-fine diamond particles, carbide or the like of a specified metal and an iron group metal.

CONSTITUTION: A sintered body is manufactured using a powdered mixture consisting of 20W85vol% diamond particles having 3W10μm particle size and the balance binder. The binder is composed of 20W95vol% hyper-fine diamond particles having ≤1μm average particle size, carbide, nitride or carbonitride of a IVa, Va or VIa group transition metal in the periodic table, a solid soln. or a crystal mixture thereof having ≤1μm particle size, and an iron group metal. The powdered mixture is hot pressed at high temp. and pressure at which diamond is stable with a superhigh pressure and high temp. apparatus. The resulting signtered body shows superior wear and welding resistances.


Inventors:
NAKAI TETSUO
YATSU SHIYUUJI
Application Number:
JP19277281A
Publication Date:
June 09, 1983
Filing Date:
December 02, 1981
Export Citation:
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Assignee:
SUMITOMO ELECTRIC INDUSTRIES
International Classes:
C22C1/05; C22C26/00; C22C29/00; C22C29/02; C22C29/16; (IPC1-7): C22C1/05; C22C29/00
Domestic Patent References:
JP46011703A
Attorney, Agent or Firm:
Akira Uchida



 
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