Sintered hard metals and the method for producing the same

Details Sintered hard metals and the method for producing the same Sintered hard metals and the method for producing the same

1988-10-31

1990-11-27

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75244, 75238, 75246, 419 25, 419 54, 419 57, 419 12, 419 13, 419 16, C22C 2900

Patent

active

049733559

ABSTRACT:
The invention relates to sintered hard metals having high cutting properties, particularly plastic deformation resistance at high temperatures, crater resistance and the like, suitable for use as cutting tools, wear resistant tools and materials for dies, and the method for producing the same. The invention has for an object to obtain both sintered hard metals having the aforesaid high properties by sintering metallic components comprising IVa group metals, VIa group metals or metals of both groups substituted by Va group metals up to 60 mol % respectively, a B-1 type solid solution hard phase consisting of non-metallic components of C, N and O, and a metallic bonding phase, in a CO gas atmosphere, and to sintered hard metals in which an uniform hardness is imparted to the surface and interior thereof by the method of sintering the said sintered hard metal in a CO gas atmosphere.

REFERENCES:
patent: 3690962 (1972-09-01), Rudy
patent: 3703368 (1972-11-01), Rudy
patent: 4049876 (1977-09-01), Yamamoto et al.
patent: 4290807 (1981-09-01), Asai et al.
Rudy, "Boundary Phase Stability and Critical Phenomena in Higher Order Solid Solution Systems", Journal of Less Common Metals, vol. 33, No. 1, Oct. 1973, p. 43-70.

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