Tool insert

Patent 4959929 Issued on October 2, 1990. Estimated Expiration Date:

December 23, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventors

Application

No. 137069 filed on 12/23/1987

US Classes:

51/307, WITH INORGANIC MATERIAL51/293, MISCELLANEOUS407/119, COMPRISING TOOL OF SPECIFIC CHEMICAL COMPOSITION428/565Nonmetal particles in a component

Examiners

Primary: Schmidt, Frederick R.
Assistant: Shideler, Blynn

Attorney, Agent or Firm

Scully, Scott, Murphy & Presser

International Class

B22F 003/14

Foreign Application Priority Data

1986-12-23 ZA

Abstract

A tool insert comprising a composite diamond abrasive compact and a method of its production are provided. The composite abrasive compact is characterized by an intermediate layer between the diamond compact and the cemented carbide support. The intermediate layer consists essentially of discrete cubic boron nitride particles constituting 60 to 40 percent by volume of the intermediate layer, carbide particles, preferably tungsten carbide particles and diamond solvent, preferably cobalt. The carbide particles and diamond solvent together constitute 40 to 60 percent by volume of the intermediate layer and the diamond solvent constitutes 15 to 25 percent by volume of the carbide/solvent combination.