Method of preparing coated cemented carbide product and resultin

Details Method of preparing coated cemented carbide product and resultin Method of preparing coated cemented carbide product and resultin

1980-04-16

1981-08-04

Kendall, Ralph S.

Stock material or miscellaneous articles

Composite

Of metal

148 165, 148 166, 148 315, 427249, 4274192, 4274197, C23C 1108

Patent

active

042822890

ABSTRACT:
An improved process for the production of coated cemented carbide products is disclosed. A cemented carbide substrate is treated to form a metal carbide, nitride or carbonitride coating. During the last part of this treatment or subsequent thereto, a sulfur-and/or nitrogen-containing gas is added to the atmosphere to form a sulfide-and/or nitride - containing layer on the coating. Thereafter, a wear-resistant oxide (e.g., aluminum oxide) coating is applied to form the improved coated cemented carbide product.

REFERENCES:
patent: 3564683 (1971-02-01), Schedler
patent: 3736107 (1973-05-01), Hale
patent: 3836392 (1974-09-01), Lux et al.
patent: 3837896 (1974-09-01), Lindstrom et al.
patent: 4018631 (1977-04-01), Hale

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