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US 2002/0170888 A1Published application
Plasma arc keyhole welding stability and quality through titanium nitride additions
AssigneeMcDermott Technology, Inc.
InventorsJohn M. Lehmann, John M. Sanders, William A. McInteer
Life of this patent
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Abstract
A method for reducing or eliminating sagging in plasma arc keyhole welds adds a fluxing agent to the weld. The fluxing agent may be titanium nitride and/or titanium carbonitride. The fluxing agent is added using physical vapor deposition or by painting a slurry onto the weld surface.
Claims9
A method for making a plasma arc keyhole weld without sagging, the method comprising:
- providing a workpiece;
- applying at least one of a titanium nitride fluxing agent and a titanium carbonitride fluxing agent to the weld workpiece;
- and
- welding the workpiece using a plasma arc keyhole welding process.
1 more element
A method of forming a plasma arc keyhole weld without sagging, the method comprising:
- providing a workpiece having a fluxing agent associated therewith;
- and
- welding the workpiece using a plasma arc keyhole welding process wherein the welding process creates a molten metal puddle having a defined surface tension and wherein the surface tension of the molten metal puddle is increased by the fluxing agent.
Dependencies are inferred from the claim text.