Welding electrode wires having alkaline earth metals

Patent metadata

Field	Value
Publication number	US-11247291-B2
Application number	US-201815981788-A
Country	US
Kind code	B2
Filing date	May 16, 2018
Priority date	Nov 16, 2016
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

The disclosed technology generally relates to welding, and more particularly to a consumable welding wire for metal arc welding, and a method and a system for metal arc welding using the consumable welding wire. In one aspect, a method of arc welding includes providing a welding wire comprising one or more alkaline earth metal elements. The method additionally includes applying power to the welding wire to generate a plasma arc sufficient to melt the welding wire. The method further includes depositing molten droplets formed by melting the welding wire onto a workpiece at a high deposition rate while regulating to maintain a substantially constant power delivered to the plasma arc.

First claim

What is claimed is:

1. A method of arc welding, comprising:
providing a welding wire comprising one or more alkaline earth metal elements;
applying power to the welding wire to generate a plasma arc sufficient to melt the welding wire; and
depositing molten droplets formed by melting the welding wire onto a workpiece at a deposition rate exceeding 30 pounds per hour while regulating to maintain a constant power delivered to the plasma arc,
wherein the welding wire includes a fluoropolymer, and wherein the method is a gas metal arc welding (GMAW).

2. The method of claim 1 , wherein the concentration of the one or more alkaline earth metal elements in the welding wire is between 0.005% and 10% based on a total weight of the welding wire.

3. The method of claim 1 , wherein the welding wire is a metal-cored welding wire comprising a sheath and a core surrounded by the sheath, wherein the core comprises the one or more alkaline earth metal elements.

4. The method of claim 3 , wherein the core comprises particles having a first base metal composition that is alloyed with the one or more alkaline earth metal elements.

5. The method of claim 3 , wherein, when present, non-metallic atomic elements in the core are present at a concentration not exceeding 5% based on the total weight of the welding wire.

6. The method of claim 5 , wherein the core further comprises the fluoropolymer.

7. The method of claim 1 , wherein the one or more alkaline earth metal elements comprises one or more of Ba or Ca.

8. A method of arc welding, comprising:
providing a welding wire comprising one or more alkaline earth metal elements;
applying power to the welding wire to generate a plasma arc sufficient to melt the welding wire; and
depositing molten droplets formed by melting the welding wire onto a workpiece at a deposition rate exceeding 30 pounds per hour while regulating to maintain a constant power delivered to the plasma arc,
wherein the welding wire is a metal-cored welding wire comprising a sheath and a core surrounded by the sheath, wherein the core comprises the one or more alkaline earth metal elements, and
wherein, when present, non-metallic atomic elements in the core are present at a concentration not exceeding 5% based on the total weight of the welding wire.

9. A method of arc welding, comprising:
providing a welding wire comprising one or more alkaline earth metal elements;
applying power to the welding wire to generate a plasma arc sufficient to melt the welding wire; and
depositing molten droplets formed by melting the welding wire onto a workpiece at a deposition rate exceeding 30 pounds per hour while regulating to maintain a constant power delivered to the plasma arc,
wherein the welding wire is a metal-cored welding wire comprising a sheath and a core surrounded by the sheath, wherein the core comprises the one or more alkaline earth metal elements, and
wherein the method is a gas metal arc welding (GMAW), and wherein the core comprises a fluoropolymer.

Assignees

• Lincoln Global Inc

Inventors

• Schaeffer John Benjamin
• Peters Steven R
• Narayanan Badri K
• Liao Yen-Chih

Classifications

• B23K9/126 Primary

  Controlling the spatial relationship between the work and the gas torch (between wire tip and piece B23K9/073) · CPC title

• B23K35/0283

  multi-cored; multiple · CPC title

• B23K9/186

  making use of a consumable electrodes · CPC title

• B23K35/0261

  Rods, electrodes or wires · CPC title

• B23K35/22

  characterised by the composition or nature of the material · CPC title