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Modified flux system in cored electrode

a flux system and cored electrode technology, applied in the field of electrodes, can solve the problems of diffusible hydrogen, cracking of weld beads, diffusible hydrogen, etc., and achieve the effect of reducing the moisture pick-up of the flux system

Inactive Publication Date: 2014-05-08
LINCOLN GLOBAL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention aims to provide a welding electrode that can lessen its ability to pick up moisture, resulting in a reduction of hydgen in the weld bead. The electrode also utilizes a flux system containing sodium-silico-titanate compound to achieve this reduction. The technical effect is the improvement of the quality of welds made using the welding electrode.

Problems solved by technology

Moreover, these electrodes produce very good looking welds with very little slag, thus saving time and expense associated with cleaning welds and disposing of slag, a problem that is often encountered in the other welding processes.
One of the many challenges during the formation of a weld metal is to reduce the amount of diffusible hydrogen in the weld bead.
Diffusible hydrogen is a known cause of cracking in weld beads.
Hydrogen in the weld metal can result in hydrogen inducing cracking and eventual detrimental failure of the weld.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 2

[0035]

TiO270-90%Sodium silicate 4-15%Potassium silicate 1-10%Sodium carbonate 3-16%Colloidal Silica2-6%Other components0-1%

example 3

[0036]

TiO270-80%Sodium silicate3.5-10% Potassium silicate1.5-6%  Sodium carbonate 5-15%Colloidal Silica2-5%Other components  0-0.5%

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Abstract

A cored electrode having reduced moisture pick-up properties and which forms a weld bead with low diffusible hydrogen in a gas shielded electric arc welding process. The cored electrode includes a metal sheath and a fill composition. The fill composition includes titanium dioxide, slag forming agent and a sodium-silica-titanate compound.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The application claims priority to, is a divisional of and fully incorporates by reference, U.S. patent application Ser. No. 11 / 099,267 filed 5 Apr. 2005.TECHNICAL FIELD[0002]The invention relates generally to the field of welding and more particularly directed to electrodes having improved weld bead formation properties, and even more particularly directed to cored electrodes having reduced moisture pick-up properties and which form weld beads having reduced amounts of diffusible hydrogen.BACKGROUND OF THE INVENTION[0003]In the field of arc welding, the main types of welding processes are gas-metal arc welding with solid (GMAW) or metal-cored wires (GMAW-C), gas shielded flux-cored arc welding (FCAW-G), self shielded flux-cored arc welding (FCAW-S), shielded metal arc welding (SMAW) and submerged arc welding (SAW). Of these processes, gas metal arc welding with solid or metal-cored electrodes are increasingly being used for joining or ov...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B23K9/173
CPCB23K9/173B23K35/3607B23K35/3608B23K35/362B23K35/368B23K35/00
Inventor KATIYAR, RAJEEV
Owner LINCOLN GLOBAL INC
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