Hard-metal or cermet body, especially for use as a cutting inser

Details Hard-metal or cermet body, especially for use as a cutting inser Hard-metal or cermet body, especially for use as a cutting inser

1999-06-29

2000-08-29

Jenkins, Daniel J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428553, 428548, 428551, B32B 1502

Patent

active

061106038

ABSTRACT:
A hard metal or cermet body, especially as a cutting insert, has a WC content in the hard phase making up at least 10% and at most 96% thereof and three layers or zones between the interior of the body and the surface formed by the heat treatment to which the sinterable body is subjected. In the outermost layer hard material with limited binder content can be formed underlain by an intermediate layer of a substantially pure WC--Co composition, the innermost layer having a tungsten content falling to the value in the body interior and a binder phase and Group IVa and Group Va metal which increased progressively to the levels in the body interior.

REFERENCES:
patent: 5181953 (1993-01-01), Nakano
patent: 5529804 (1996-06-01), Bobbeau et al.
patent: 5652045 (1997-07-01), Nakamura et al.
patent: 5665431 (1997-09-01), Narasimhan
patent: 5702829 (1997-12-01), Paidassi et al.

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