A method for assembling at least one rolling support and guide element with a complementary part by direct flash welding includes the step of a first step carried out by a first flashing phase intended to increase the temperature of the surfaces to be welded in a homogeneous manner, the duration of this first step being between 15 s and 40 s. A second step is carried out by a phase of preheating by Joule effect of the parts to be welded, the duration of this second step being between 45 s and 55 s with a heating current of between 55 kA and 70 kA. A third step is carried out by a second flashing phase to deoxidize the faces to be welded while avoiding their re-oxidation, the duration of this third step being between 12 s and 22 s and with a flashing current of between 16 kA and 19 kA. A step is included bringing the surfaces to be welded into contact.

A flux-cored wire including a steel sheath and a flux, in which a chemical composition of the steel sheath includes C: from 0% to 0.650%, Si: from 0.03% to 0.50%, Mn: from 3.1% to 30.0%, P: from 0% to 0.050%, S: from 0% to 0.050%, Cu: from 0% to 5.0%, Ni: from 1.0% to 30.0%, Cr: from 0% to 10.0%, Mo: from 0% to 10.0%, Nb: from 0% to 1.0%, V: from 0% to 1.0%, Co: from 0% to 1.0%, Pb: from 0% to 1.0%, Sn: from 0% to 1.0%, Al: from 0% to 0.10%, Ti: from 0% to 0.10%, B: from 0% to 0.1000%, N: from 0% to 0.500%, balance: Fe and impurities, Mn+Ni5.0%, Mn+Ni+Cr15.0% or more, and a fraction of fcc in the steel sheath is 70% or more.

A shielded metal arc welding rod including a core wire made of steel and a flux coating the core wire, in which a chemical component of the core wire includes C: from 0% to 0.650%, Si: from 0.03% to 0.50%, Mn: from 2.1% to 30.0%, P: from 0% to 0.050%, S: from 0% to 0.050%, Cu: from 0% to 5.0%, Ni: from 1.0% to 30.0%, Cr: from 0% to 10.0%, Mo: from 0% to 10.0%, Nb: from 0% to 1.00%, V: from 0% to 1.00%, Co: from 0% to 1.00%, Pb: from 0% to 1.00%, Sn: from 0% to 1.00%, Al: from 0% to 0.10%, Ti: from 0% to 0.10%, B: from 0% to 0.1000%, N: from 0% to 0.5000%, balance: Fe and impurities, (Mn+Ni) is 5.0% or more, (Mn+Ni+Cr) is 15.0% or more, and a fraction of fcc is 70% or more.

A high-strength steel laser welding filler, comprising the following components in percentages by weight: 0.05-0.5% of C, 0.1-2% of Cu, 0.2-2.5% of Cr, 0.5-3.5% of Mo, and 2-10% of Ni, with the balance being Fe and inevitable impurities. The filler is used for laser filler welding of hot-formed steel which has an aluminum-containing coating on the surface thereof, can effectively reduce the adverse effect of the aluminum-containing coating on the surface on the strength of a joint, and enables the strength and plasticity of the welded joint, after hot stamping, to reach 90% or more of those of a base material.

The present invention relates to an impeller manufacturing method in which a thermal cycle is performed on an assembly body with a brazing material formed of a Ni-containing Au alloy being placed at a bond portion of at least two impeller constituent members. The thermal cycle includes a temperature increasing process with a temperature increasing rate of 20 C./hr. to 100 C./hr., the process including a first intermediate retention and a second intermediate retention each keeping the temperature, the first intermediate retention performed in a temperature range of 500 C. to 850 C. and the second intermediate retention performed in a temperature range of 850 C. to 950 C. (but not including 850 C.). In the thermal cycle, the temperature is increased in a temperature range exceeding 950 C. after the second intermediate retention at a rate lower than that before the second intermediate retention.

A steek suitable for structural components used in contact with liquid lead or liquid lead alloys in nuclear reactors consisting of in weight % (wt. %): C 0.02-0.09; Si 0.1-1.6; Mn 1.5-3.0; Cr 9.0-12.0; Ni 10.0-16.8; Al 2.0-3.4; Ti 0.1-1.0; Nb0.5; V0.5; Ta1.5; Y0.5; Mo1.5; W1.5; Cu1.7; N0.06; Co1.0; B0.1; Zr0.5; Hf0.5; RE0.2; Ca0.1; Mg0.1; Bi0.1; SE0.1 and balance Fe apart from impurities, wherein the content of RE does not include the amount of Y but only the amount of the elements having an atomic numbers 21 and 57-71, wherein the steel fulfils one or more of the following requirements: Cr.sub.Eq=18.5-21 and Ni.sub.Eq=11-20 wherein Cr.sub.Eq=Cr+3Al+2Si+1.5[(Ti+Nb+V+Ta+Zr)4.5(C+N)] and Ni.sub.Eq=Ni+0.5((Mn+Cu+Co). 5-25 volume % delta ferrite.

A metal-cored electrode for welding to form a weld bead on a ferrous material, which weld bead includes at least 35 wt. % nickel. The metal-cored electrode includes a metal sheath surrounding a core. The core includes greater than 35 wt. % nickel.

Systems and methods for low-manganese welding alloys are disclosed. An example arc welding consumable may comprise: between 0.4 and 1.0 wt % manganese; strengthening agents selected from the group consisting of nickel, cobalt, copper, carbon, molybdenum, chromium, vanadium, silicon, and boron; and grain control agents selected from the group consisting of niobium, tantalum, titanium, zirconium, and boron. The grain control agents may comprise greater than 0.06 wt % and less than 0.6 wt % of the welding consumable. The resulting weld deposit may comprise a tensile strength greater than or equal to 70 ksi, a yield strength greater than or equal to 58 ksi, a ductility (as measured by percent elongation) of at least 22%, and a Charpy V-notch toughness greater than or equal to 20 ft-lbs at 20 F. The welding consumable may provide a manganese fume generation rate less than 0.01 grams per minute during the arc welding operation.

Systems and methods for low-manganese welding alloys are disclosed. An example arc welding consumable may comprise: between 0.4 and 1.0 wt % manganese; strengthening agents selected from the group consisting of nickel, cobalt, copper, carbon, molybdenum, chromium, vanadium, silicon, and boron; and grain control agents selected from the group consisting of niobium, tantalum, titanium, zirconium, and boron. The grain control agents may comprise greater than 0.06 wt % and less than 0.6 wt % of the welding consumable. The resulting weld deposit may comprise a tensile strength greater than or equal to 70 ksi, a yield strength greater than or equal to 58 ksi, a ductility (as measured by percent elongation) of at least 22%, and a Charpy V-notch toughness greater than or equal to 20 ft-lbs at 20 F. The welding consumable may provide a manganese fume generation rate less than 0.01 grams per minute during the arc welding operation.

An austenitic stainless alloy welded joint which includes a weld metal excellent in weld hot cracking resistance, polythionic acid SCC resistance, naphthenic acid corrosion resistance, and age-toughness is provided. A weld metal (20) contains, in mass %, C: 0.020% or less, Si: 0.01 to 1.00%, Mn: 0.20 to 2.00%, P: 0.030% or less, S: 0.010% or less, Cr: 16.0 to 25.0%, Ni: 15.0 to 40.0%, Mo: 2.5 to 5.0%, Nb: 0.10 to 2.00%, N: 0.05 to 0.30%, sol. Al: 0.001 to 0.100%, and B: 0.0010 to 0.0050%, with F1 defined by Formula (1) being 2.30 or less, and F2 defined by Formula (2) being 2.5 or less.

[00001]$\begin{array}{cc}F1=130B+8C+0.025Cr+0.25\mathrm{Mn}+0.08\mathrm{Mo}+0.6\mathrm{Nb}+12P+7.6S+0.78\mathrm{Si}+0.012W& \left(1\right)\end{array}$$\begin{array}{cc}F2={\left[\mathrm{Mo}\right]}_H/{\left[\mathrm{Mo}\right]}_L& \left(2\right)\end{array}$