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. Further, the core includes a carbon source and an agglomerate having a Group I or Group II compound, silicon dioxide, and titanium dioxide. Additionally, the carbon source and the agglomerate together comprise less than 10% of the core by weight.

Systems and methods for welding electrodes

A metal-core weld wire usable for gas shielded arc welding gapless joints on low carbon and low alloy galvanized and galvanealed steels. The metal-core weld wire includes a low carbon steel sheath surrounding a core composition. In one embodiment, the low carbon steel sheath includes, by total weight of the metal-core weld wire, between approximately 0.01-0.03% C, and the core composition includes, by total weight of the metal-core weld wire, between approximately 0.05-0.20% Ti, between approximately 0.05-1.00% Nb, Fe powder, and Mn to the extent that the metal-core weld wire includes between approximately 0.1-1.0% Mn wherein the metal-core weld wire includes between approximately 0.1-1.0% Si. The core composition is, by total weight of the metal-core weld wire, between approximately 0.001-12.0%. The metal-core weld wire provides, at weld rates up to 150 cm/min, reduced arc ionization potential and spatter, and improved arc stability and shielding. The metal-core weld wire produces, at weld rates up to 150 cm/min, weld deposits having reduced blow holes and porosity, no liquid metal embrittlement, and reduced weld pool surface tension resulting in an improved wetting characteristic.

Metal-core weld wire for welding galvanized steels

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.

Metal-core weld wire with reduced core fill percentage

The present invention is a weld wire comprising a sheath encapsulating a metal core made of powdered metal, wherein a fill percentage of the metal core is no less than approximately 12%. The metal core comprises a core composition alloyed with an alloying element or an combination of elements comprising Cr, Mo, V, W, Hf and Nb or combinations thereof, wherein a total weight percentage of the alloying element or the combination of elements in the core composition does not exceed approximately 1%. In a particular embodiment, the alloying element is Mo in the amounts selected from the range of about 0 to about 0.5 percent by weight and the fill percentage of the metal core is selected from the range of about 12% to about 30%. In a particular embodiment of the invention, the total percentage of the combination of elements is selected from the range of about 0.4% to about 0.8%.

Low carbon, high speed metal core wire

Two steel members are resistance welded using a filler therebetween in the form of either an insert or a metallized layer on the inner surface of one steel member. The steel members have respective compositions at least one of which comprises at least one alloying element having a concentration which contributes substantially to solidification cracking extensive enough to produce an unacceptable weld fracture. The filler has a composition which, during welding, melts and mixes with molten metal from the steel members, at the welding location, and dilutes the concentration there of one or more of the alloying elements which contribute substantially to solidification cracking. This reduces substantially the contribution, to solidification cracking, of each alloying element which has been so diluted. The cumulative dilution of these alloying elements is sufficient to produce an acceptable weld fracture.

Method for resistance welding with dilution metal and product thereof

A method for arc welding a very low carbon steel containing 0005-006% C characterized by employing a welding material with nickel together with high carbon so as to form weld metal containing nickel Solidification cracking on the thus welded metal can be prevented

Method for welding very low carbon steel

Verfahren zum lichtbogenschweissen von stahl mit sehr niedrigem kohlenstoffgehalt

OF THE DISCLOSURE A method for arc welding of a very-low carbon steel containing 0.005 - 0.06%C characterized by em-ployment of welding material with nickel together with high carbon so as to form weld metal containing nickel so that the solidification cracking on the thus welded metal can be prevented.

Oshita Shigeru

Papers

Method for welding very low carbon steel

Verfahren zum lichtbogenschweissen von stahl mit sehr niedrigem kohlenstoffgehalt

Method for arc welding of very low carbon steel