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US 11,897,063 B2Granted
Systems and methods for low-manganese welding wire
AssigneeHobart Brothers Company
InventorsMario Anthony Amata, Joseph C. Bundy, Steven Edward Barhorst, Susan Renata Fiore, Daryl L. Duncan
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Abstract
The invention relates generally to welding and, more specifically, to welding wires for arc welding, such as Gas Metal Arc Welding (GMAW) or Flux Core Arc Welding (FCAW). In one embodiment, a tubular welding wire includes a sheath and a core. The tubular welding wire is configured to form a weld deposit on a structural steel workpiece, wherein the weld deposit includes less than approximately 2.5% manganese by weight.
Claims7
A method of manufacturing a welding electrode, comprising:
- disposing a granular core within a metallic sheath to form the welding electrode, wherein the welding electrode comprises less than 0.5% manganese by weight, wherein the granular core comprises:
- between 4% and 18% alloying components by weight of the core, wherein the alloying components comprise between 2% and 12% nickel metal powder by weight of the core;
- between 10% and 15% arc stabilizing components by weight of the core;
- between 25% and 50% slag forming components by weight of the core, wherein the slag forming components comprise a pigment-grade titanium dioxide agglomerate;
- between 5% and 15% deoxidizing components by weight of the core;
- and
- between 5% and 60% filler metal by weight of the core,
- wherein the TiO2 used to form the pigment-grade titanium dioxide agglomerate is purified titanium dioxide, and
- wherein the titanium dioxide agglomerate consists essentially of:
- purified titanium dioxide, silica, potassium oxide, sodium oxide, and lithium fluoride, and
- wherein the welding electrode comprises a carbon equivalence (CE) between 0.08 and 0.3 according to the equation:
- CE=% C+% Si/30+(% Mn+% Cu+% Cr)/20+% Ni/60+% Mo/15+% V/10+5*% B
- wherein % C represents a weight percentage of carbon in the welding electrode, % Si represents a weight percentage of silicon in the welding electrode, % Mn represents a weight percentage of manganese in the welding electrode, % Cu represents a weight percentage of copper in the welding electrode, % Cr represents a weight percentage of chromium in the welding electrode, % Ni represents a weight percentage of nickel in the welding electrode, % Mo represents a weight percentage of molybdenum in the welding electrode, % V represents a weight percentage of vanadium in the welding electrode, and % B represents a weight percentage of boron in the welding electrode.
10 more elements
Dependencies are inferred from the claim text.