Flux cored wire for gas shielded arc welding

A gas-shielded, flux-cored welding wire technology, applied in arc welding equipment, welding equipment, welding medium, etc., can solve the problems of difficulty in improving the moisture absorption characteristics of flux and research on moisture absorption characteristics, and achieve good welding operability, excellent moisture absorption resistance, The effect of improving hygroscopic properties

Active Publication Date: 2019-06-21
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] On the other hand, the flux-cored welding wires described in the aforementioned Patent Documents 1 and 2 have not studied the moisture absorption characteristics.
In addition, it is difficult to improve the moisture absorption characteristics of the flux itself with other existing technologies

Method used

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  • Flux cored wire for gas shielded arc welding
  • Flux cored wire for gas shielded arc welding
  • Flux cored wire for gas shielded arc welding

Examples

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Embodiment Construction

[0022] Hereinafter, the form for implementing this indication is demonstrated in detail. In addition, this indication is not limited to each embodiment shown below.

[0023] The flux-cored welding wire of the present embodiment has a steel sheath filled with flux, and its outer diameter is, for example, 1.0 to 2.0 mm. In addition, the material of the sheath is not particularly limited as long as it is steel, but it is desirable to use mild steel or low-alloy steel with good wire drawing properties. In addition, as long as each component in the welding wire is within the scope of the present invention, the flux filling rate can be set to any value, but from the viewpoint of drawability of the welding wire and operability (feedability, etc.) 10 to 25% by mass of the total mass of the welding wire. [Amount of acid-soluble Mg in flux]

[0024] In the flux-cored welding wire of this embodiment, acid-soluble Mg is blended in the flux. Here, the so-called "acid-soluble Mg" refers...

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Abstract

Provided is a flux cored wire for gas shielded arc welding that has excellent resistance to hygroscopicity and adequate welding workability and can produce weld metal with excellent mechanical properties. The flux cored wire for gas shielded arc welding is formed by filling a flux into a steel outer sheath, in which the flux contains acid-soluble Mg, a content of the acid-soluble Mg in a first flux component having a particle diameter of 75 µm or less in the flux is set at 0.1 to 5% by mass relative to the total mass of the first flux component, a content of the acid-soluble Mg in a second flux component having a particle diameter of more than 75 µm and 106 µm or less in the flux is set at 0.1 to 7% by mass relative to the total mass of the second flux component, and a content of the acid-soluble Mg in a third flux component having a particle diameter of more than 106 µm in the flux is set at 1 to 15% by mass relative to the total mass of the third flux component.

Description

technical field [0001] The invention relates to a gas-shielded arc welding flux-cored welding wire. Background technique [0002] In the manufacturing process of large structures such as ships and bridges, fillet welding and / or butt welding are often used, and in this case, flux-cored welding wire is used as a welding material. On the other hand, weld metals for ships, bridges, and the like are required to be excellent in low-temperature toughness and mechanical properties in terms of construction. In addition, in a flux-cored wire used for welding, it is desired that welding workability be good. [0003] Therefore, conventionally, there has been proposed a flux-cored welding wire in which the particle size of the Mg raw material used for the flux is within a specific range to improve welding workability (see Patent Document 1). In addition, in addition to welding workability, there is also a flux-cored wire in which the wire components are determined in order to improve t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/368B23K9/16
CPCB23K35/0266B23K9/173B23K35/22B23K35/3053B23K35/3601B23K35/3608B23K35/361B23K35/362B23K35/40B23K35/406C22C38/002C22C38/02C22C38/04C22C38/06C22C38/08C22C38/14C22C38/18
Inventor 菊地和幸笹仓秀司小池贵之
Owner KOBE STEEL LTD
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