Sprayed coatings on metal surfaces
AssigneeSKF Industrial Trading and Development Company, B.V.
InventorsCyril E. Rhodes, Martin B. Verburgh
Life of this patent
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Abstract
Process of improving a sprayed layer on a bearing or tool component subjected to relatively high stresses, characterized in that the layer is remelted by a heat-source in a vacuum chamber, the heating being arranged such that only the layer itself is remelted.
Claims10
A method of producing an improved layer bonding in a bearing tool component subjected to relatively high stresses and comprising a sprayed exterior coating layer on a base member, said method comprising the steps of:
- spraying said exterior coating layer on said base member;
- and applying heat directly only to said exterior coating layer in an amount sufficient for remelting only said layer, in a chamber evacuated to a pressure of 10.sup.-1 torr or less, so that the properties of said base member remain substantially unaltered and the bonding improved.
A method of producing improved layer bonding in a layer coated metallic base member component, comprising the steps of spraying a metallic base member compound with a continuous exterior coating layer of a relatively porous oxidic alloy, placing said sprayed base member component in a reduced pressure chamber of 10.sup.-1 torr or less, and heating said layer in said chamber with a heat source employing a focussed heat confined to limited points only on said layer without said base member component being affected, and with sufficient energy to effect only remelting of said layer to reduce the porosity and oxide content of said layer, the properties of said base member remaining substantially unaltered, and the bonding of said layer to said base member thereby being improved.
Dependencies are inferred from the claim text.