Boron diffusion coating process
AssigneeHowmet Corporation
InventorWilliam J. Hayes
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Abstract
This invention is addressed to a process for the diffusion coating of metals which are capable of forming a compound or a solid solution with boron by contacting the metal with boron at a temperature greater than 1350.degree.F.
Claims8
A process for the diffusion coating of a cemented metal carbide selected from the group consisting of carbides of tungsten, tantalum, titanium, columbium, molybenum, vanadium, chromium, zirconium, silicon and hafnium, comprising the steps of packing the cemented carbide in a powder consisting essentially of boron and a refractory salt or oxide selected from the group consisting of aluminum oxide, silica, zirconium oxide, and mixtures thereof, with the boron constituting from 0.2 to 15% by weight of the total weight of the boron and the refractory oxide or salt, and heating the pack to a temperature within the range of 1350.degree. to 2500.degree.F to diffusion coat the metal carbide.
Dependencies are inferred from the claim text.