Aluminum deoxidizing welding wire

Abstract

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 welddeposit and a basic slag over the weld bead.

Description

Background technique [0001] The present invention relates generally to the field of welding systems and, more particularly, to welding wires that improve weld seam properties. [0002] Welding systems typically utilize a welding wire configured to pass an arc between a welding torch and a workpiece, thereby heating the workpiece to create a weld. Many forms of welding are known and commonly used in the art. In many systems such as metal inert gas (MIG) systems, the wire electrode is advanced through the torch and is typically consumed by the heat of the arc. In this operation, the wire electrode may also be referred to as a "filler" that becomes part of the weld bead. Although gas is used to shield the weld in many applications, some types of welding wire do not require shielding gas, such wires use gas infrequently, or even not recommended. These may be referred to as self-shielded welding wires. [0003] The type of wire electrode selected for a particular welding applic...

AI Technical Summary

Problems solved by technology

Although gas is used to shield the weld in many applications, some types of welding ...

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