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Flux cored wire for gas shielded arc welding

A technology of gas shielding and flux-cored welding wire, applied in arc welding equipment, welding equipment, welding media, etc., can solve the problems that it is difficult to improve the hygroscopic properties of flux, and the hygroscopic properties have not been studied, so as to achieve good welding operability and improve hygroscopic properties , excellent mechanical 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

[0007] On the other hand, although the flux-cored welding wire described in the aforementioned Patent Document 1 can improve the mechanical properties of the weld metal and the welding workability, no study has been made on the moisture absorption properties.
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

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Embodiment Construction

[0020] Hereinafter, the form for implementing this indication is demonstrated in detail. In addition, this indication is not limited to each embodiment shown below.

[0021] 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.) It is 10-25% by mass of the total mass of welding wire.

[0022] [Amount of acid-soluble Al in flux]

[0023] In the flux-cored welding wire of this embodiment, acid-soluble Al is blended in the flux. Here, the so-called "acid-soluble Al...

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Abstract

Provided is a flux-cored wire for gas shielded arc welding that is excellent in moisture absorption resistance, has good welding workability, and can obtain a weld metal with excellent mechanical properties. In the gas shielded arc welding flux-cored wire in which the flux is filled in the steel sheath, the flux contains acid-soluble Al, and the total mass of the first flux component having a particle size of 75 μm or less in the flux is made. The acid-soluble Al content in the first flux component is 0.1 to 5% by mass, relative to the total mass of the second flux component having a particle size of more than 75 μm and not more than 106 μm in the flux, the second flux component The acid-soluble Al content in the flux is 0.1 to 5% by mass, and relative to the total mass of the third flux component having a particle size higher than 106 μm in the flux, the acid-soluble Al content in the third flux component is 0.1 to 7% by mass.

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. Therefore, conventionally, a flux-cored welding wire in which welding operability and mechanical properties of the weld metal are improved by specifying an arc stabilizer and / or a flux composition has been proposed (see Patent Document 1). [0003] [Prior Art Literature] [0004] 【Patent Literature】 [0005] Patent Document 1: Japanese Unexamined Patent Publication No. 2003-9419...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/12
CPCB23K35/0266B23K35/3066B23K35/30B23K35/36B23K35/362B23K35/40B23K35/02B23K35/22C22C38/00C22C38/02C22C38/04C22C38/06C22C38/08C22C38/14C22C38/18B23K9/173B23K35/3053B23K35/406B23K9/16B23K35/3093B23K35/361B23K35/368
Inventor 菊地和幸笹仓秀司小池贵之
Owner KOBE STEEL LTD
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