Alumina coated cemented carbide body

Details Alumina coated cemented carbide body Alumina coated cemented carbide body

1995-02-17

1997-06-03

Utech, Benjamin

Coating processes

With post-treatment of coating or coating material

Gas jet or blast mechanically treats coating

4273762, 4274193, B05D 304

Patent

active

056352476

ABSTRACT:
An improved multilayer alumina coated cemented carbide insert is made by depositing on the substrate a .kappa.-alumina layer, wet blasting the surface of that insert and then heat-treating the resulting insert at 900.degree. C.-1100.degree. C. for 0.3-10 hours to convert the .kappa.-alumina to .alpha.-alumina. One or more further alumina layers can then be applied.

REFERENCES:
patent: Re31520 (1984-02-01), Lindstrom et al.
patent: Re32110 (1986-04-01), Hale
patent: 3736107 (1973-05-01), Hale
patent: 5071696 (1991-12-01), Chatfield et al.
patent: 5137774 (1992-08-01), Ruppi
patent: 5162147 (1992-11-01), Ruppi

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