Cored wire for treating molten metal and method of manufacture and use thereof
AssigneeMinerals Technologies Inc.
InventorsPhillip Ronald King, Richard Shaddinger Baum
Life of this patent
Estimating the term…
Abstract
A cored wire consisting of an inner calcium wire surrounded by an aluminum sheath forming a composite core which in turn is encased in a steel jacket. The cored wire is formed continuously by covering an extruded calcium wire with aluminum then inserting the aluminum covered calcium wire into a steel jacket in a roll forming process. Also disclosed is a method of reducing splashing when introducing calcium metal into a molten ferrous metal bath.
Claims23
A cored wire for introducing calcium and aluminum into a bath of molten metal produced by:
- extruding said calcium metal into an elongated wire having a generally cylindrical shape;
- covering said calcium wire with a sheath of aluminum to form a composite core wire;
- and
- inserting said composite core wire into a steel jacket.
A method of treating molten ferrous metal with calcium metal comprising the steps of:
- providing a cored wire consisting essentially of an inner core of calcium wire surrounded by a jacket of aluminum, to form a composite wire core which is covered by a steel jacket;
- and
- introducing said cored wire as a continuous structure into a bath of molten ferrous metal until a desired weight of calcium has been introduced into said molten ferrous metal.
A method of using a cored wire for reducing splashing and reactivity of calcium metal when introduced into a bath of molten ferrous metal as a calcium wire surrounded by a steel jacket comprising the step of:
- forming a core composite of calcium wire with a sheath of aluminum followed by insertion of said core composite into said steel jacket.
A cored wire for introducing reactive metals into a molten metal bath said cored wire comprising an outer jacket having a higher melting point then an inner core material, the inner core material being a composite of a first reactive metal surrounded by a sheath of a second reactive metal the first and second reactive metals melting at lower temperatures than the outer jacket to form an alloy prior to melting of the outer jacket.
A cored wire for introducing a reactive metal into a bath of molten metal produced by:
- extruding said reactive metal into an elongated core wire having a generally cylindrical shape;
- covering said reactive metal elongated core wire with a layer of at least one second reactive metal, to form a composite core;
- concurrently partially roll forming a sheath using a multi-step roll forming process, said sheath partially formed into a generally trough shaped member with peripheral edges having formed therein surfaces adapted to be mated and formed into a lock seam;
- inserting said composite core into said trough shaped portion of said partially formed sheath with said composite core positioned to accommodate a lock seam to be formed in said sheath;
- and
- finishing said cored wire by further roll forming steps to close said sheath around said composite core and forming a continuous lock seam in said sheath.
Dependencies are inferred from the claim text.