Methods for the production of clad steel products
AssigneeCladinox International Limited
InventorAntonio Giorgio Cacace
Life of this patent
Estimating the term…
Abstract
Billets and methods for manufacturing them are disclosed. The billets include a cladding member including an alloy selected from the group including stainless steel, nickel-chrome, nickel-copper, and copper-nickel alloys, and a steel body that is positioned so that it has an interface with the cladding member, the steel body having a formation in which the scavenging metal is located and elements being provided for separating the scavenging metal from the cladding member at the interface.
Claims17
A billet comprising:
- a cladding member comprised of an alloy selected from the group consisting of:
- stainless steel, nickel-chrome, nickel-copper and copper-nickel alloys, and
- a carbon steel body that is positioned so that it has an interface with the cladding member,
- wherein a part of the steel body that has the interface with the cladding member comprises:
- a formation selected from a cavity, a passage, a bore and a recess in which scavenging metal that serves to scavenge oxygen and all other gases except inert gases from residual air at the interface is located and
- a barrier that separates the scavenging metal from the cladding member at the interface, and
- a sealing weld that seals the billet.
A method of forming a billet comprising:
- a cladding member comprised of an alloy selected from the group consisting of:
- stainless steel, nickel-chrome, nickel-copper and copper-nickel alloys, and a carbon steel body that is positioned so that it has an interface with the cladding member,
- the method comprising:
- forming in the steel body a formation selected from a cavity, a passage, a bore and a recess, providing a barrier member,
- inserting scavenging metal that serves to scavenge oxygen and all other gases except inert gases from residual air at the interface in the formation such that it is separated from the cladding member at the interface by the barrier member, and
- forming a sealing weld that seals the billet.
A method of forming corrosion resistant ferrous product, the method comprising:
- providing a billet comprising a cladding member comprised of an alloy selected from the group consisting of:
- stainless steel, nickel-chrome, nickel-copper and copper-nickel alloys, and a carbon steel body that is positioned so that it has an interface with the cladding member, wherein a part of the steel body that has the interface with the cladding member has a formation selected from a cavity, a passage, a bore and a recess in which scavenging metal that serves to scavenge oxygen and all other gases except inert gases from residual air at the interface is located and a barrier being provided that separates the scavenging metal from the cladding member at the interface, and a sealing weld that seals the billet;
- and
- heating the billet and working the billet to form a corrosion resistant ferrous product.
Dependencies are inferred from the claim text.