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Ni base alloy flux cored wire

A technology of flux-cored welding wire and base alloy, applied in welding medium, welding equipment, metal processing equipment, etc., to achieve the effect of improved viscosity, excellent weld bead shape, and uniform slag coverage

Active Publication Date: 2017-08-25
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the Ni-based alloy flux-cored wire described in Patent Document 4 does not study the welding workability in vertical welding and overhead welding positions at all.

Method used

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  • Ni base alloy flux cored wire
  • Ni base alloy flux cored wire
  • Ni base alloy flux cored wire

Examples

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Embodiment Construction

[0036] Hereinafter, the embodiment of the present invention will be described in detail.

[0037] The flux-cored welding wire of the present invention is a Ni-based alloy flux-cored welding wire in which the sheath of the Ni-based alloy is filled with flux. Furthermore, the flux-cored wire contains Ni, Cr, Mo, and Nb in specified amounts in the total mass, and the flux contains TiO in specified amounts based on the total mass of the welding wire. 2 , SiO 2 , ZrO 2 , MnO 2 、Al 2 o 3 , and the flux contains alkali metal compounds of Na, K, and Li in predetermined amounts in terms of alkali metals based on the total mass of the welding wire, and fluorides in predetermined amounts in terms of fluorine.

[0038] Hereinafter, the reasons for limiting the components of the flux-cored wire will be described.

[0039]

[0040] Ni is added to stabilize the austenite structure. When the Ni content is less than 52% by mass, the content of other elements increases relatively, the ...

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Abstract

The present invention provides a Ni-based alloy flux cored wire used in all-position welding of a Ni-based alloy, 9% Ni steel, highly corrosion-resistant austenite-based stainless steel, etc. which produces an excellent bead shape and welding metal having excellent arc stability and slag separability, and satisfactory strength, toughness, defect resistance, high temperature crack resistance, and corrosion resistance. The Ni-based alloy flux cored wire is filled with flux in a sheath of a Ni-based alloy, and contains prescribed amounts of Ni, Cr, Mo, and Nb relative to the total mass of the wire. The flux contains prescribed amounts of TiO_2, SiO_2, ZrO_2, MnO_2, and Al_2O_3 relative to the total mass of the wire. In addition, the flux contains a prescribed amount of an alkaline metal compound of Na, K, and Li in an alkaline metal conversion value and a prescribed amount of fluoride in a fluorine conversion value relative to the total mass of the wire.

Description

technical field [0001] The invention relates to a Ni-based alloy flux-cored welding wire used in welding 9% Ni steel, Ni-based alloy, high corrosion-resistant austenitic stainless steel and the like. Background technique [0002] Welding materials composed of Ni-based alloys are used, for example, for welding Ni-based alloys used as structural components such as chemical plants and petroleum-related equipment, and high corrosion-resistant austenitic stainless steels. Alternatively, a welding material composed of a Ni-based alloy is used for welding 9% Ni steel or the like used as structural members such as storage tanks for LNG, liquid nitrogen, or liquid oxygen. [0003] In recent years, for special welding materials such as Ni-based alloys, gas-shielded arc welding using Ni-based alloy flux-cored wires, which can be expected to have higher work efficiency, has been promoted compared with clad arc welding and TIG welding. [0004] Here, in gas shielded arc welding using a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/368
CPCB23K35/0266B23K35/304B23K35/3608
Inventor 菅原大志池田哲直
Owner KOBE STEEL LTD
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