Welding wire and welding method

Patent metadata

Field	Value
Publication number	US-9643284-B2
Application number	US-201313778793-A
Country	US
Kind code	B2
Filing date	Feb 27, 2013
Priority date	Jun 10, 2005
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

A welding wire is formed from a hoop having an inner surface and formed from a metal material, a core wire having a surface and formed from a metal material, and an alkaline metal compound. The hoop metal material and the core wire metal material are different from each other. A composition of the welding wire is divided into the hoop metal material and the core wire metal material. The alkaline metal compound is disposed between the inner face of the hoop and the surface of the core wire. An amount of the alkaline metal compound is from more than 10 ppm to 1000 ppm based on a weight of the welding wire.

First claim

The invention claimed is:

1. A welding wire, comprising:
a hoop having an inner surface, and being formed from a metal material;
a core wire having a surface, and being formed from a metal material; and
an alkaline metal compound,
wherein said hoop metal material and said core wire metal material are different from each other, a composition of said welding wire is divided into said hoop metal material and said core wire metal material, and said alkaline metal compound is disposed between said inner face of said hoop and said surface of said core wire, and an amount of said alkaline metal compound is from more than 10 ppm to 1000 ppm based on a weight of said welding wire, and
wherein said welding wire does not contain a flux.

2. The welding wire according to claim 1 , wherein said alkaline metal compound is a potassium metal compound.

3. A consumable electrode welding method using a welding wire which comprises
a hoop having an inner surface, and being formed from a metal material;
a core wire having a surface, and being formed from a metal material; and
an alkaline metal compound,
wherein said hoop metal material and said core wire metal material are different from each other, a composition of said welding wire is divided into said hoop metal material and said core wire metal material, and said alkaline metal compound is disposed between said inner face of said hoop and said surface of said core wire, and an amount of said alkaline metal compound is from more than 10 ppm to 1000 ppm based on a weight of said welding wire,
wherein said consumable electrode welding method comprising using said welding wire as an anode and conducting the welding in a shield gas which contains an inert gas with a concentration of 99.5% or more, and
wherein said welding wire does not contain a flux.

Assignees

• Nat Inst For Materials Science

Inventors

• Nakamura Terumi
• Hiraoka Kazuo

Classifications

• B23K35/24 Primary

  Selection of soldering or welding materials proper (B23K35/34 takes precedence) · CPC title

• B23K35/0261

  Rods, electrodes or wires · CPC title

• B23K35/40

  Making wire or rods for soldering or welding · CPC title