Method for production of titanium welding wire
AssigneeNorsk Titanium AS
InventorKevin Dring
Life of this patent
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Abstract
A process for producing a weldable titanium or titanium alloy wire characterised in that full consolidation of the wire is achieved via solid-state processing entailing compaction, extrusion, and rolling, whereby melting of the constituent titanium sponge particles does not occur.
Claims18
1-15. (canceled)
Method for producing a weldable wire or strip of titanium, wherein the method consists of:
- placing one or more particles of titanium sponge into the chamber of an uniaxial press,
- cold compacting the sample of particulate material in ambient air atmosphere to form a billet,
- heating the billet up to a temperature in the range from 400-1000° C.,
- place the heated billet into the die of a preheated hot-extruder press and extrude a bar or profile of the billet at a temperature in the range from 400-1000° C.,
- remove surface contaminants from the extruded bar or profile, and
- place the extruded bar or profile in a roller mill with one or more rolls placed in series to form the weldable strip or wire with the desired diameter.
Weldable titanium wire composed of titanium sponge particles from the Kroll process which has been physically consolidated by cold compaction, extrusion and rolling without melting or encapsulation of the titanium sponge particles, and wherein the wire contains less than 2500 ppm oxygen, 300 ppm N, 800 ppm C and 150 ppm H.
Dependencies are inferred from the claim text.