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Flux-cored wire for non gas shielded welding

A technology of self-protection and welding wire, which is applied in the direction of welding equipment, welding medium, welding/cutting medium/material, etc. It can solve the problems that the impact toughness cannot be guaranteed, achieve good arc stability, excellent low-temperature impact toughness, and improve low-temperature impact toughness Effect

Inactive Publication Date: 2017-05-24
SHOUGANG CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a self-shielded flux-cored welding wire, which solves the problem that the current self-shielded flux-cored wire cannot guarantee low-temperature impact toughness below -40°C

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The self-shielding flux-cored welding wire for all-position welding with low temperature and high toughness adopts SPCC cold-rolled steel strip as the sheath; the chemical composition (weight%) of the flux core is: CaF 2 : 12%, TiO 2 : 15%, Mn: 6%, CaO: 15%, MgO: 4%, Zircon sand: 4%, Al-Mg: 3%, Ni: 5%, other fluorides: 7%, iron oxide: 4% , Al 2 o 3 :2%, MnO 2 : 5%, SiO 2 : 3%, the balance is iron powder; the filling rate of the flux core in the flux cored wire is 15%.

Embodiment 2

[0032] The self-shielding flux-cored welding wire for all-position welding with low temperature and high toughness adopts SPCC cold-rolled steel strip as the sheath; the chemical composition (weight%) of the flux core is: CaF 2 : 18%, TiO 2 : 16%, Mn: 8%, CaO: 7%, MgO: 5%, Zircon sand: 3%, Al-Mg: 2.5%, Ni: 4%, other fluorides: 3%, iron oxide: 6% , Al 2 o 3 :3%, MnO 2 : 2%, SiO 2 : 1%, the balance is iron powder; the filling rate of the flux core in the flux cored wire is 18%.

Embodiment 3

[0034] The self-shielding flux-cored welding wire for all-position welding with low temperature and high toughness adopts SPCC cold-rolled steel strip as the sheath; the chemical composition (weight%) of the flux core is: CaF 2 : 21%, TiO 2 : 13%, Mn: 4%, CaO: 7%, MgO: 9%, Zircon sand: 1%, Al-Mg: 5%, Ni: 9%, other fluorides: 9%, iron oxide: 3% , Al 2 o 3 :4%, MnO 2 : 5%, SiO 2 : 5%, the balance is iron powder; the filling rate of the flux core in the flux cored wire is 21%.

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Abstract

The invention discloses a flux-cored wire for non gas shielded welding and belongs to the technical field of welding. The flux-cored wire comprises an outer skin and a flux core. The outer skin is a SPCC cold-rolled strip; the flux core comprises the following components in percentage by weight: 12-25% of CaF2, 10-20% of TiO2, 5-10% of Mn, 5-15% of CaO, 2-10% of MgO, 1-5% of zircon sand, 0.5-5% of Al-Mg, 3-10% of Ni and the balance of iron powder; and the filling rate of the flux core in the flux-cored wire is 15-25%. The flux-cored wire has excellent electric arc stability and low-temperature impact toughness; and the impact toughness of welding line metal is greater than 60 J at minus 40 DEG C.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a flux-cored welding wire for self-shielded welding. In particular, it relates to a low-alloy steel flux-cored welding wire for low-temperature high-toughness all-position welding. Background technique [0002] Self-shielded flux-cored welding is compatible with the advantages of welding rod and gas-shielded welding wire, and has high production efficiency and good welding process performance. Therefore, this welding method has been widely used in the processing and manufacturing of steel structures such as pipelines, ships, bridges, and offshore platforms. Because of this, the functional requirements for flux-cored welding wire are getting higher and higher. It is required that the flux-cored welding wire can not only adapt to faster welding speed, but also have good welding process performance and all-position welding adaptability, as well as play a good role. Toughness (esp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/3053B23K35/40
Inventor 牟淑坤张飞虎王敬礼杨建炜陈延清王凤会郭占山张熹张楠董现春刘宏齐建
Owner SHOUGANG CORPORATION
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