Metal-core weld wire with reduced core fill percentage
AssigneeIllinois Tool Works Inc.
InventorsSundaram Nagarajan, Roger A. Daemen
Life of this patent
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Abstract
An improved metal-core weld wire, usable for joint and surface welding, having a steel sheath with a core, and a core composition disposed in the core of the steel sheath, wherein the core composition is between approximately 0.001-12.0% total weight of the metal-core wire. The metal-core wires of the present invention have improved manufacturability. In another embodiment, the core composition includes iron powder in an amount that provides an oxygen content less than approximately 600 ppm in the metal-core wire for producing weld deposits with improved impact strength properties.
Claims19
A metal-core weld wire for producing weld deposits with improved impact strength properties, the metal-core wire comprising:
- a steel sheath with a core;
- a core composition disposed in the core of the steel sheath, the core composition between approximately 0.001-9.0% total weight of the metal-core wire,
- wherein the core composition includes iron powder in an amount that provides an oxygen content less than approximately 600 ppm in the metal-core wire.
A method of making an improved metal-core weld wire, the method comprising steps of:
- forming a steel sheath about a core composition, the core composition between approximately 0.001-12.0% total weight of the metal-core wire;
- filling approximately 40-70% of a steel sheath core area with the core composition before drawing;
- and
- drawing the metal-core wire with approximately 40-70% of the steel sheath core area filled with the core composition to reduce a diameter of the metal-core wire.
An improved baked metal-core weld wire comprising:
- a steel sheath with a core;
- and
- a core composition disposed in the core of the steel sheath, the core composition between approximately 0.001-9.0% total weight of the metal-core wire.
An improved metal-core weld wire comprising:
- a steel sheath with a core;
- by weight, between approximately,
- ______________________________________ C 0.005-0.150%, Mn 0.50-2.5%, Si 0.20-1.2%;
- and ______________________________________
- a core composition disposed in the core of the steel sheath, the core composition includes iron powder, and the core composition is, by total weight of the metal-core wire, between approximately 2.5-6.0%.
An improved metal-core weld wire comprising:
- a steel sheath with a core;
- by weight, between approximately,
- ______________________________________ C 0.01-0.30%, Mn 1.0-4.0%, Si 0.3-2.5%, Cr 16.0-30.0%, Ni 6.0-25.0%, Mo 0.05-8.0%;
- and ______________________________________
- a core composition disposed in the core of the steel sheath the core composition includes iron powder, and the core composition is, by total weight of the metal-core wire, between approximately 9-11%.
An improved metal-core weld wire comprising:
- a steel sheath with a core;
- by weight, between approximately,
- ______________________________________ C 0.01-0.30%, Mn 1.0-4.0%, Si 0.3-2.5%, Cr 16.0-30.0%, Ni 6.0-25.0%, Ti 0.001-2.5%;
- and ______________________________________
- a core composition disposed in the core of the steel sheath, the core composition includes iron powder, and the core composition is, by total weight of the metal-core wire, between approximately 9-11%.
An improved metal-core weld wire comprising:
- a steel sheath with a core;
- by weight, between approximately,
- ______________________________________ C 0.005-0.15%, Mn 0.5-2.5%, Si 0.2-1.2%, ______________________________________
- one or more elements selected from the group consisting essentially of Cr, Ni, Ti, Mo, and B;
- and
- a core composition disposed in the core of the steel sheath, the core composition includes iron powder, and the core composition is, by total weight of the metal-core wire, between approximately 2.5-6.0%.
Dependencies are inferred from the claim text.