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Flux-cored wire for gas-shielded arc welding

A gas shielded arc welding technology, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of unstable arc, cold crack resistance without special consideration, and lack of welding operability, etc. Achieve the effect of excellent defect resistance and excellent cold crack resistance

Active Publication Date: 2018-04-17
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the technology described in Patent Document 1, since a large amount of metal fluoride is added, the arc becomes unstable during vertical welding, and good welding workability cannot be obtained.
In addition, in the technology described in Patent Document 1, no special consideration is given to cold crack resistance.
[0010] Therefore, in the conventional flux-cored wire, it is a problem to obtain a weld metal that is excellent in welding workability in vertical upward welding and also excellent in cold cracking resistance.

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

[0038] Hereinafter, modes for implementing the present invention will be described in detail. The flux-cored welding wire of the present embodiment is a welding wire in which a steel sheath is filled with flux. Moreover, the flux-cored welding wire contains C, Mn, TiO 2 , Ni, and keep P and S below the specified amount. In addition, in flux cored wire, about TiO 2 , when the content of the particle size below 106 μm in the total mass of the welding wire is α1 (mass %), and the content of the particle size higher than 106 μm in the total mass of the welding wire is α2 (mass %), for the ratio of the two α1 / The value of α2 is specified.

[0039] In the flux-cored welding wire, it is preferable that a predetermined amount of at least one of Si and Si oxide is further contained in the total mass of the wire in terms of Si conversion values. In addition, the flux-cored wire preferably further contains a predetermined amount of at least one of Cr, Cu, and Mo based on the total m...

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Abstract

Provided is a flux-cored wire for gas-shielded arc welding that contains specific amounts of C, Mn, TiO2, and Ni and specific amounts or less of P and S. The TiO2 has a ratio (Alpha 1 / Alpha 2) of 0.90-1.50 when Alpha 1 (mass%) is the content per wire total mass of particles having a size of 106 [mu]m or smaller and Alpha 2 (mass%) is the content per wire total mass of particles having a size exceeding 106 [mu]m.

Description

technical field [0001] The invention relates to a gas-shielded arc welding flux-cored welding wire. More specifically, it relates to a gas-shielded arc welding flux-cored wire for all-position welding. Background technique [0002] In the field of marine structures and line pipes, the deep water in the sea area where energy resource development is carried out, the expansion of resource exploration and mining areas for extreme sea areas such as the Arctic Ocean, and the enlargement of equipment are in progress. Against the background of such technological trends, in the design of marine structures and line pipes, higher strength and higher toughness are promoted, and the performance requirements for welded joints are also becoming stricter. [0003] On the other hand, regarding welding materials, flux-cored wires for all-position welding are required from the viewpoint of high efficiency. In addition, high fracture toughness is also required for the resulting weld metal. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/368B23K35/30C22C38/00C22C38/04
CPCB23K35/0266B23K35/30B23K35/3053B23K35/368C22C38/00C22C38/001C22C38/002C22C38/04C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54C22C38/58B23K35/3608C22C38/08
Inventor 山上雅史永见正行北川良彦
Owner KOBE STEEL LTD
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