Alumina coated cemented carbide body
AssigneeSeco Tools AB
InventorSakari Ruppi
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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.
Claims9
A method for producing an alumina coated cemented carbide insert comprising depositing a .kappa.-alumina coating on a cemented carbide substrate, wet blasting the surface of the .kappa.-alumina coating and heat treating the wet-blasted .kappa.-alumina surface at a temperature of 900.degree.-1100.degree. C. for 0.3-10 hours to convert the wet-blasted .kappa.-alumina to .alpha.-alumina.
Dependencies are inferred from the claim text.