The invention relates generally to welding and, more specifically, to corrosion resistant weld deposits created during arc welding, such as Gas Metal Arc Welding (GMAW) or Flux Core Arc Welding (FCAW). A disclosed corrosion resistant weld deposit comprises nickel, chromium, and copper, and has a low porosity.

A method for producing a surface of a base material, wherein the base material has spheroidal graphite cast iron, wherein firstly a partial surface is located, in a further step a two-ply buffer layer is used by means of TIG welding with the welding additive NiFe, wherein in a further step a fill layer is applied to the buffer layer, wherein the MIG welding method is used in conjunction with NiFe-2 in accordance with EN ISO 107 as welding additive material.

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 process for additive manufacture of an article including conjoined first and second metals, wherein the first metal includes one of steel and titanium and the second metal includes another of the steel and the titanium. The process comprises arranging an interface layer of a third metal on a substrate of the first metal, wherein the third metal is capable of forming an alloy with the first metal and capable of forming an alloy with the second metal. The process further comprises supplying a consumable form of the second metal to a locus of the interface layer and heating the locus of the interface layer in an non-reactive environment. In this process, the heating fuses the consumable form of the second metal to render a fused form of the second metal and joins the fused form of the second metal to the interface layer.

A method of forming a ferrous metal case-hardened layer using additive manufacturing. The method includes delivering, by a material delivery device, a filler material to a surface of a substrate. The substrate includes a first ferrous metal. The filler material includes a second ferrous metal and a carbon-based material. The method also includes directing, by an energy delivery device, an energy toward a volume of the filler material to join at least some of the filler material to the substrate to form a component.

A system includes a laser welder and a filler wire feed. The laser welder is configured to weld a workpiece to at least one additional workpiece to form a welded assembly. Each of the workpieces is formed from a steel material and comprises an aluminum based coating thereon. The filler wire feed is configured to feed a filler wire to an interface between the workpieces when the workpieces are being welded to each other to form the welded assembly. The filler wire comprises a composition that includes nickel and chromium. The filler wire is configured to bind with aluminum in the aluminum based coating so as to minimize formation of brittle intermetallics due to mixing of the aluminum in the aluminum based coating with the iron/steel material in the weld joint.

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 method for producing a component by means of an additive manufacturing method using a laser is proposed, the method comprising the following steps: (a) providing a metal powder, (b) applying a powder layer (18) of the metal powder to a build platform (14) of a process chamber (12), (c) introducing a first process gas into the process chamber (12), (d) melting a first selected region (36) of the applied powder layer (18) by means of a laser in a first atmosphere which includes the first process gas, (e) introducing a second process gas into the process chamber (12), wherein the second process gas differs from the first process gas at least in terms of its composition and/or its pressure, and (f) melting a second selected region (38) of the applied powder layer (18) by means of the laser in a second atmosphere which includes the second process gas, wherein the second selected region (38) differs from the first selected region (36).

An austenitic heat-resistant steel weld metal with low high-temperature cracking susceptibility and good creep strength is provided. The austenitic heat-resistant steel weld metal has a chemical composition of, in mass %: 0.06% -0.14% C; 0.1%-0.6%Si; 0.1%-1.8%Mn; up to 0.025% P; up to 0.003% S; 25%-35% Ni; 20%-24% Cr; more than 4.5% and up to 7.5% W; 0.05%-0.5% Nb; 0.05%-0.4% V; 0.1%-0.35% N; up to 0.08% Al; up to 0.08% O; and 0.0005 to 0.005% B, fn1 expressed by the following Equation (1) being not less than 10:

fn1=10(Nb+V)+1.5W+20N+1500B25Si (1), where, for Nb, V, W, N, B and Si in Equation (1), the contents of the named elements in mass % are substituted.

The disclosed technology generally relates to consumable electrode wires and more particularly to consumable electrode wires having a core-shell structure, where the core comprises chromium. In one aspect, a welding wire comprises a sheath having a steel composition and a core surrounded by the sheath. The core comprises chromium (Cr) at a concentration between about 12 weight % and about 18 weight % on the basis of the total weight of the welding wire, manganese (Mn) at a concentration between about 12 weight % and about 18 weight % on the basis of the total weight of the welding wire, nickel (Ni) at a concentration between zero and about 5 weight % on the basis of the total weight of the welding wire, and carbon (C) at a concentration greater than zero weight %, wherein concentrations of Ni, C and Mn are such that [Ni]+30[C]+0.5[Mn] is less than about 12 weight %, wherein [Ni], [C], and [Mn] represent weight percentages of respective elements on the basis of the total weight of the welding wire. The disclosed technology also relates to welding methods and systems adapted for using the chromium-comprising electrode wires.