Coated cemented carbide product

Details Coated cemented carbide product Coated cemented carbide product

1975-06-12

1977-04-19

Smith, Ronald H.

Metal treatment

Compositions

Heat treating

428538, 148 165, 148 166, 148 32, 427249, 427343, 427377, 427379, 427 49F, 428469, 428472, C22c 1400, C22c 1600, C22c 2702, C22c 2704

Patent

active

040186318

ABSTRACT:
Improved adherence of oxide coatings on cemented carbide substrate containing tungsten and cobalt is attained by forming on the substrate a coating selected from carbide, nitride, carbonitride and mixtures thereof, diffusing tungsten and cobalt from the substrate into the coating, oxidizing said coating, and coating said oxidized coating with oxide wear layer.

REFERENCES:
patent: 3656995 (1972-04-01), Reedy
patent: 3771976 (1973-11-01), Wakefield
patent: 3772058 (1973-11-01), Bloom
patent: 3784402 (1974-01-01), Reedy
patent: 3791847 (1974-02-01), Araki et al.
patent: 3807008 (1974-04-01), Reedy

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