A solid wire for electroslag welding, including Fe and, by mass % based on a total mass of the wire: C: more than 0% and 0.03% or less; Si: more than 0% and 0.10% or less; Mn: more than 0% and 0.25% or less; Ni: 10.5%-14.0%; S: more than 0% and 0.010% or less; Al: more than 0% and 0.250% or less; REM: 0.002%-0.080%; and O: more than 0% and 0.0090% or less.

A method of attaching a first metal object to a second metal object is presented. The first metal object and the second metal object are dissimilar materials. The first metal object comprises an upper surface and a lower surface. The method comprises: positioning the first metal object in intimate contact with the second metal object such that the second metal object is in contact with the lower surface of the first metal object; identifying at least one attachment location on the upper surface of the first metal object where the first metal object is in intimate contact with the second metal object; adding a powdered metal on the upper surface of the first metal object at the at least one attachment location; and firing a heat source at the powdered metal to melt the powdered metal and drive the melted powdered metal through the first metal object and into the second metal object.

A method of attaching a first metal object to a second metal object is presented. The first metal object and the second metal object are dissimilar materials. The first metal object comprises an upper surface and a lower surface. The method comprises: positioning the first metal object in intimate contact with the second metal object such that the second metal object is in contact with the lower surface of the first metal object; identifying at least one attachment location on the upper surface of the first metal object where the first metal object is in intimate contact with the second metal object; adding a powdered metal on the upper surface of the first metal object at the at least one attachment location; and firing a heat source at the powdered metal to melt the powdered metal and drive the melted powdered metal through the first metal object and into the second metal object.

Provided is an austenitic stainless steel weld joint that is excellent in polythionic acid SCC resistance and naphthenic acid corrosion resistance, and is also excellent in creep ductility. An austenitic stainless steel weld joint includes a base material and a weld metal. The weld metal has a chemical composition at its width-center position and at its thickness-center position consisting of, in mass %, C: 0.050% or less, Si: 0.01 to 1.00%, Mn: 0.01 to 3.00%, P: 0.030% or less, S: 0.015% or less, Cr: 15.0 to 25.0%, Ni: 20.0 to 70.0%, Mo: 1.30 to 10.00%, Nb: 0.05 to 3.00%, N: 0.150% or less, and B: 0.0050% or less, with the balance: Fe and impurities.

A flux for electroslag welding used for electroslag welding may include a basic oxide, an amphoteric oxide, an acidic oxide, and a fluoride. With respect to a total mass of the flux, the basic oxide may include 5.1 mass % or more and 30.0 mass % or less of CaO, the acidic oxide includes 17 mass % or less of SiO.sub.2, and the fluoride includes 35 mass % or more and 73 mass % or less of CaF2. A content of the CaO is 30 mass % or more with respect to a total mass of the basic oxide, a content of the SiO.sub.2 is 80 mass % or more with respect to a total mass of the acidic oxide, a content of the CaF.sub.2 is 80 mass % or more with respect to a total mass of the fluoride, and a value of (2×[CaF.sub.2]+[CaO])/[SiO.sub.2] is 5 or more and 56 or less.

A flux for electroslag welding used for electroslag welding may include a basic oxide, an amphoteric oxide, an acidic oxide, and a fluoride. With respect to a total mass of the flux, the basic oxide may include 5.1 mass % or more and 30.0 mass % or less of CaO, the acidic oxide includes 17 mass % or less of SiO.sub.2, and the fluoride includes 35 mass % or more and 73 mass % or less of CaF2. A content of the CaO is 30 mass % or more with respect to a total mass of the basic oxide, a content of the SiO.sub.2 is 80 mass % or more with respect to a total mass of the acidic oxide, a content of the CaF.sub.2 is 80 mass % or more with respect to a total mass of the fluoride, and a value of (2×[CaF.sub.2]+[CaO])/[SiO.sub.2] is 5 or more and 56 or less.

Provided is an austenitic stainless steel weld joint that is excellent in polythionic acid SCC resistance and naphthenic acid corrosion resistance, and is also excellent in creep ductility. An austenitic stainless steel weld joint includes a base material and a weld metal. The weld metal has a chemical composition at its width-center position and at its thickness-center position consisting of, in mass %, C: 0.050% or less, Si: 0.01 to 1.00%, Mn: 0.01 to 3.00%, P: 0.030% or less, S: 0.015% or less, Cr: 15.0 to 25.0%, Ni: 20.0 to 70.0%, Mo: 1.30 to 10.00%, Nb: 0.05 to 3.00%, N: 0.150% or less, and B: 0.0050% or less, with the balance: Fe and impurities.

A system and method for dual-twin SAW cladding is disclosed. The method includes arranging a first twin SAW head in close proximity to a second twin SAW head, delivering electroslag flux to a surface of a workpiece to create a layer of electroslag flux atop the workpiece, directing two first consumable wires through the first twin SAW head towards the surface of the workpiece, directing two second consumable wires through the second twin SAW head towards the surface of the workpiece, introducing the two first consumable wires and the two second consumable wires into a molten slag pool formed on the surface of the workpiece to melt the two first consumable wires and the two second consumable wires via resistive heating, and translating the first twin SAW head and the second twin SAW head together to form a cladded deposit on the workpiece.

Cladding strip feeders having independent pressure rollers and strip cladding systems with cladding strip feeders having independent pressure rollers are disclosed. A disclosed example cladding strip feeder for a strip cladding system includes: a drive roller to advance a cladding strip along a strip feed path through contact plates; a first pressure roller positioned along the strip feed path opposite a first section of the drive roller; a second pressure roller positioned along the strip feed path opposite a second section of the drive roller; a third pressure roller positioned along the strip feed path opposite a third section of the drive roller; a first pressure adjuster to set a first pressure applied to the cladding strip by the first pressure roller and the first section of the drive roller; a second pressure adjuster to set a second pressure applied to the cladding strip by the second pressure roller and the second section of the drive roller; and a third pressure adjuster to set a third pressure applied to the cladding strip by the third pressure roller and the third section of the drive roller, the first pressure roller, the second pressure roller, and the third pressure roller being configured to apply symmetric pressure across a width of the cladding strip by selectively setting at least one of the second pressure adjuster to apply the second pressure or the third pressure adjuster to apply the third pressure based on the cladding strip having one of at least three incremental strip widths.

Strip cladding heads having independent strip pressure adjustments and strip cladding systems with strip cladding heads having independent strip pressure adjustments are disclosed. A disclosed example cladding head for strip cladding system includes a first contact jaw, a second contact jaw, and a third contact jaw. The first contact jaw includes first and second contacts to deliver welding power to a cladding strip that is driven between the first and second contacts. The second contact jaw includes third and fourth contacts to deliver the welding power to the cladding strip that is driven between the third and fourth contacts. The third contact jaw includes fifth and sixth contacts to deliver the welding power to the cladding strip that is driven between the fifth and sixth contacts, where the first, second, and third contact jaws selectively provide symmetrical contact with the cladding strip across a width of the cladding strip when the cladding strip has one of at least three incremental strip widths, and the three incremental strip widths correspond to ones of the first, second, and third contact jaws.