Provided is a welding method and electrodes (wires) with aluminum as a primary deoxidizer and a basic flux system for joining a workpieces with weld metal of comparable strengths and enhanced toughness. For instance, provided is a welding wire, comprising an aluminum content configured to act as a primary deoxidizer, and an overall composition configured to produce a weld deposit comprising a basic slag over a weld bead, wherein the aluminum content is configured to kill the oxygen in the weld pool, and wherein the oxygen comprises oxygen provided by a shielding gas or produced by heating of welding filler materials. Further provided is a welding method comprising arc welding a workpiece using an electrode having aluminum as a primary deoxidizer under a gas shield to produce a bead of weld deposit and a basic slag over the weld bead.

Aluminum deoxidizing welding wire

This disclosure relates generally to arc welding. In an embodiment, a welding system has a welding gas supply system configured to supply a gas flow including a shielding gas and a fluorine-containing gas to a weld pool. Furthermore, the shielding gas is configured to control an atmosphere surrounding the weld pool, the fluorine-containing gas is configured to reduce diffusible hydrogen in the weld pool, and the fluorine-containing gas is substantially free of sulfur.

System and method of reducing diffusible hydrogen in weld metal

This disclosure relates generally to welding, and more specifically, to submerged arc welding (SAW). In an embodiment, a welding system includes a gas supply system configured to provide a gas flow. The system also includes a wire supply system configured to provide welding wire, and a flux supply system configured to provide flux near a welding arc during submerged arc welding (SAW). The system further includes a welding torch assembly configured to receive the gas flow and the welding wire and to deliver the gas flow and the welding wire near the welding arc during SAW.

System and method for submerged arc welding

This disclosure relates generally to welding, and more specifically, to submerged arc welding (SAW). In an embodiment, a welding system (10) includes a gas supply system (16) configured to provide a fluorine-containing gas flow. The system also includes a wire supply system (14) configured to provide welding wire, and a flux supply system (17) configured to provide flux near a welding arc during submerged arc welding (SAW). The system further includes a welding torch assembly (18) configured to receive the fluorine- containing gas flow and the welding wire and to deliver the fluorine- containing gas flow and the welding wire near the welding arc during the SAW.

Systems and methods for using fluorine-containing gas for submerged arc welding

To provide a stainless steel flux-cored wire for self-shielded arc-welding, which exhibits excellent defect resistance and crack resistance and from which a weld metal superior in toughness can be obtained, and which provides excellent welding workability.SOLUTION: The stainless steel sheath and the flux contain in total, in mass% based on the total mass of a wire: 0.04% or less of C, 0.1-1.0% of Si, 0.5-3.0% of Mn, 10-14% of Ni, 22.0-25.5% of Cr, 2.0-3.0% of Mo, and 0.01- 0.5% of Ti. The flux contains a total amount of 4.0-7.5% TiOconversion value, a total amount of 0.2-1.8% SiOconversion value, a total amount of 0.01-0.10% ZrOconversion value, a total amount of 0.01-0.10% AlOconversion value, a total amount of 0.01-0.10% Bi conversion value, a total amount of 0.01-0.20% Na conversion value and K conversion value, and a total amount of 0.1-1.0% F conversion value.SELECTED DRAWING: None

Stainless steel flux-cored wire for self-shielded arc welding

PURPOSE: To obtain a weld zone having high strength without welding defects such as high-temp cracking and to make possible sure and easy welding by using a flux contg CaO and incorporating a metallic Al component into either or both of the flux and base material for a wire CONSTITUTION: The flux 3 is prepd by adding and mixing adequately CaO powder or Al (alloy) powder together with the CaO powder to and with a flux consisting of an ordinary compsn The flux 3 cored wire 1 for welding is constituted by filling the flux 3 into a hollow wire 2 The wire 2 consists of an Fe, Ni, Co or other alloy to be used for ordinary welding and in the case of incorporating Al therein, the Al is incorporated into a molten pool by way of a droplet and reacts with CaO thereby deoxidizing and desulfurizing powerfully the molten metal The weld zone which obviates the generation of the high temp cracking, etc and has the high strength is obtd and the sure and easy welding is made possible by the above-mentioned constitution COPYRIGHT: (C)1986,JPO&Japio

Shiro Mantani

Papers

Flux cored wire for welding