Method of producing metal composites which can be processed at high temperatures
AssigneeSigmabond Technologies Corporation
InventorRoy Hardwick
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Abstract
A method whereby a composite clad metal ingot can be produced for onward processing at higher temperatures which are sufficient to allow the properties of the substrate material to be adequately controlled to meet specified requirements. These higher temperatures are required to avoid the undue levels of work hardening which occurs at the lower temperatures previously employed because of the need to avoid the formation of deleterious intermetallics at the bonded clad substrate interface. Such intermetallics are formed at temperatures above approximately 900° C. and should they be present, will weaken or destroy the bond.
Claims9
A method of producing a composite material, including a layer of metal cladder material and a metal substrate material wherein an interlayer material is interposed between said metal cladder material and said metal substrate material, which comprises bonding said metal interlayer material to said metal cladder material and said metal substrate material, and thereafter hot forming said composite material, said metal interlayer material being such that upon heating said composite material and hot forming at a temperature above 900° C., the bonds between said metal cladder material and said metal interlayer material and between said metal substrate material and said interlayer material are not adversely affected, the interlayer material preventing the formation of intermetallics and depletion of the bond between the substrate material and the cladder material, said metal substrate comprising carbon or stainless steel;
- the metal cladder material comprising titanium, alloy thereof, zirconium or alloy thereof;
- and the metal interlayer material comprising niobium, alloy thereof, tantalum or alloy thereof.
Dependencies are inferred from the claim text.