ALUMINUM DEOXIDIZING WELDING WIRE

摘要

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.

主权项

1. A flux-cored welding wire, comprising:
aluminum, manganese, and silicon, wherein the flux-cored welding wire comprises:
between approximately 0.4% and approximately 2.5% aluminum by weight;less than 2% manganese by weight; andless than 1% silicon by weight; wherein the flux-cored welding wire has a basicity index greater than 51, and wherein the flux-cored welding wire is configured to produce a weld deposit comprising an oxygen content that is less than approximately 0.0129% by weight and a nitrogen content that is less than approximately 0.0056% by weight.