In a stainless steel flux cored wire comprising a stainless steel shell and a flux filling the shell, the amount of Si contained in the entire wire is 2.5% by mass or higher, preferably 3.0% by mass or higher in terms of SiO.sub.2, and the amount of at least one compound selected from the group consisting of polytetrafluoroethylene, graphite fluoride and perfluoropolyether contained in the flux is 0.005 to 0.10% by mass of the total mass of the wire in terms of F, preferably 0.020% by mass or higher. By employing such a constitution, in welding of CrNi-based and Cr-based stainless steels and other materials, fume generation and hexavalent chromium leaching can be significantly reduced, and excellent welding workability can be provided.

Disclosed is a submerged arc welding wire, comprising the following at mass percentage: 0.85-1.60% of Mo; 2.50-4.50% of Ni; 0.10-0.30% of Ti; 0.005-0.02% of B; 0.005-0.02% of REM; 1.60-2.00% of Mn; C which is greater than 0 and less than or equal to 0.06%; Si which is greater than 0 and less than or equal to 0.10%; P which is less than or equal to 0.008%; S which is less than or equal to 0.006%; and the balance being Fe. Also disclosed are a welding method and a weld metal. The welding process by the submerged arc welding wire and welding method and the welded welding joint have relatively high tensile strength and relatively good low temperature toughness, and the welding process has a relatively high welding speed, so that the requirements for X120 pipeline welding and pipe manufacturing can be satisfied.

An iron-based braze filler alloy consists of from 9 wt % to 30 wt % Cr; from 5 wt % to 25 wt % Ni; from 0.5 wt % to 9 wt % Mo; from 1 wt % to 5 wt % Mn; from 0 wt % to 1 wt % N; from 6 wt % to 20 wt % Si; from 0.1 wt % to 15 wt % P; and is balanced with Fe.

Methods for welding a particle-matrix composite body to another body and repairing particle-matrix composite bodies are disclosed. Additionally, earth-boring tools having a joint that includes an overlapping root portion and a weld groove having a face portion with a first bevel portion and a second bevel portion are disclosed. In some embodiments, a particle-matrix bit body of an earth-boring tool may be repaired by removing a damaged portion, heating the particle-matrix composite bit body, and forming a built-up metallic structure thereon. In other embodiments, a particle-matrix composite body may be welded to a metallic body by forming a joint, heating the particle-matrix composite body, melting a metallic filler material forming a weld bead and cooling the welded particle-matrix composite body, metallic filler material and metallic body at a controlled rate.

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.

An exemplary welding consumable according to the invention is provided and includes up to about 0.13 wt % carbon, about 0.3 wt % to about 1.4 wt % manganese, about 7.25 wt % to about 11.5 wt % nickel, about 0.6 wt % to about 1.2 wt % molybdenum, about 0.2 wt % to about 0.7 wt % silicon, up to about 0.3 wt % vanadium, up to about 0.05 wt % titanium, up to about 0.08 wt % zirconium, up to about 2.0 wt % chromium, and a balance of iron and incidental impurities.

A method for laser welding of one or more workpieces made from press hardenable steel, in a butt joint, in which the workpiece or the workpieces have a thickness of at least 1.8 mm and/or a jump in thickness of at least 0.4 mm arises at the butt joint including supplying filler wire into a molten bath generated by a laser beam. In order to ensure that the weld seam can reliably harden into a martensitic structure during the hot forming (press hardening), the filler wire contains at least one alloy element from the group of manganese, chromium, molybdenum, silicon and nickel, wherein the at least one alloy element is present in the filler wire with a mass proportion that is larger by 0.1% by weight than the mass proportion of the element in the press hardenable steel of the workpiece or the workpieces.

Methods for joining a first blank and a second blank are disclosed, wherein at least one of the first and second blanks comprising at least a layer of aluminum or of an aluminum alloy. Methods may comprise selecting a first portion of the first blank to be joined to the second blank, and selecting a second portion of the second blank to be joined to the first portion; welding the first portion to the second portion, while supplying a metal powder to a weld zone, wherein the first portion and the second portion of the blanks and the metal powder in the weld zone are melted during welding and the metal powder is mixed with the melted first and second portions, and wherein the metal powder is an iron based powder comprising gammagenic elements. The disclosure further relates to blanks and products obtained using such methods.

The invention relates to an alloy based on iron comprising, by weight: 35%Ni37% trace amountsMn0.6% trace amountsC0.07% trace amountsSi0.35% trace amountsCr0.5% trace amountsCo0.5% trace amountsMo0.5% trace amountsS0.0035% trace amountsO0.0025% 0.011%[(3.138Al+6Mg+13.418Ca)(3.509O+1.770S)]0.038% 0.0003%Ca0.0015% 0.0005%Mg0.0035% 0.0020%Al0.0085%
the remainder being iron and residual elements resulting from the elaboration.

The weld metal of the present invention is formed by gas shield arc welding using a flux-cored wire, has a predetermined chemical component composition, and contains 20% or more of Ti. The amount of Ti-containing oxide particles having a circle-equivalent diameter of 0.15-1.0 m is at least 5000 per square mm, the amount of V per total mass of weld metal present as a compound within the weld metal is 0.002% or more, and the average circle equivalent diameter of V-containing carbide present in the weld metal is 15 nm or less.