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A flux cored wire

A technology of flux-cored welding wire and powder, applied in welding equipment, welding media, welding/cutting media/materials, etc., can solve problems such as lower labor efficiency, poor anti-porosity, and porosity defects, so as to enhance anti-porosity ability and reduce Pore ​​content, effect of improving anti-porosity performance

Active Publication Date: 2021-12-24
常州长海焊材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the production technology of flux-cored wire in China is basically mature, but common problems such as poor porosity resistance when welding sprayed parts with ordinary flux-cored wire lead to serious porosity defects when welding welds
Therefore, the process operation during welding must be strictly controlled, and the base metal must be pretreated before welding, which increases the labor intensity of workers and reduces labor efficiency.

Method used

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  • A flux cored wire

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Effect test

Embodiment 1

[0032] Embodiment 1 is a flux-cored welding wire disclosed in the present invention, including a steel strip and a powder filled inside the steel strip. The components of the powder and its mass percentage in the total powder are as follows: rutile 42%, limestone 6.5% , graphite 0.47%, alumina 7.1%, magnesium-aluminum alloy 4.3%, fluoride 3%, silicon-manganese alloy 1.7%, boron powder 5.5%, chromium powder 4%, nickel powder 2.85%, titanium powder 1.2%, aluminum powder 0.83 %, niobium powder 0.18% and iron powder 20.87%;

[0033] The silicon-manganese ratio in the silicon-manganese alloy is 1:3.5;

[0034] Fluoride as CaF 2 Mixtures with LiBaF;

[0035] The mass percentage of the powder in the total amount of welding wire is 17.5%;

[0036] The pretreatment step of the medicinal powder is as follows: mixing and granulating the raw materials of the medicinal powder, sintering at 750°C for 15 minutes, and then pulverizing it into fine powder, and the mesh number of the fine po...

Embodiment 2

[0038]Embodiment 2 is a flux-cored welding wire disclosed by the present invention, which includes a steel strip and powder filled inside the steel strip. The components included in the powder and their mass percentages in the total powder are as follows: rutile 44%, limestone 7.5% , graphite 0.56%, alumina 8.2%, magnesium aluminum alloy 5.5%, fluoride 4.5%, silicon manganese alloy 2.5%, boron powder 6.8%, chromium powder 5.3%, nickel powder 3.35%, titanium powder 1.7%, aluminum powder 1.25% %, niobium powder 0.38% and iron powder 8.46%;

[0039] The silicon-manganese ratio in the silicon-manganese alloy is 1:3.5;

[0040] Fluoride is CaF 2 Mixture with LiBaF;

[0041] The mass percentage of medicinal powder in the total amount of welding wire is 17.5%;

[0042] The pretreatment steps of the medicinal powder are as follows: mixing and granulating the raw materials of the medicinal powder, sintering at 750°C for 15 minutes, and then pulverizing into a fine powder with a mesh...

Embodiment 3

[0044] Embodiment 3 is a flux-cored welding wire disclosed by the present invention, which includes a steel strip and powder filled inside the steel strip. The components included in the powder and their mass percentages in the total powder are as follows: rutile 35%, limestone 5% , graphite 0.4%, alumina 5.5%, magnesium aluminum alloy 3.5%, fluoride 2%, silicon-manganese alloy 1.6%, boron powder 4%, chromium powder 3%, nickel powder 2.5%, titanium powder 0.8%, aluminum powder 0.5% %, niobium powder 0.1% and iron powder 36.1%;

[0045] The silicon-manganese ratio in the silicon-manganese alloy is 1:3.5;

[0046] Fluoride is CaF 2 Mixture with LiBaF;

[0047] The mass percentage of medicinal powder in the total amount of welding wire is 17.5%;

[0048] The pretreatment steps of the medicinal powder are as follows: mixing and granulating the raw materials of the medicinal powder, sintering at 750°C for 15 minutes, and then pulverizing into a fine powder with a mesh size of 85...

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Abstract

The invention relates to a flux-cored welding wire, which includes a steel strip and powder filled inside the steel strip. The components contained in the powder and their mass percentages in the total amount of the powder are as follows: 35-50% rutile, 5-50% limestone 8%, graphite 0.4‑0.6%, alumina 5.5‑8.5%, magnesium alloy 3.5‑6.5%, fluoride 2‑5%, silicon manganese alloy 1.6‑2.8%, boron powder 4‑8%, chromium powder 3‑ 6%, nickel powder 2.5-3.5%, titanium powder 0.8-2%, aluminum powder 0.5-1.5%, niobium powder 0.1-0.5%, and the balance is iron powder. The invention has the effect of improving the porosity resistance performance when the flux-cored welding wire is welded with the parent metal.

Description

technical field [0001] The invention relates to the technical field of metal welding materials, in particular to a flux-cored welding wire. Background technique [0002] Welding wire is a metal welding material used as filler metal or at the same time as conductive. In gas welding and gas tungsten arc welding, the wire is used as the filler metal; in submerged arc welding, electroslag welding and other gas metal arc welding, the wire is both the filler metal and the conductive electrode. Welding wire is generally divided into two categories: solid wire and flux-cored wire. The outer layer of the flux-cored wire is metal material, and the inner layer is wrapped with powder to meet different welding needs, while the solid-core welding wire is not wrapped with powder. The flux-cored wire is also called powder core. Welding wire or tubular welding wire, which is divided into two categories: air-entrained protection and non-aerated protection. The surface of the flux-cored weld...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/368
CPCB23K35/3086B23K35/368B23K35/361B23K35/0266
Inventor 毛兰秀
Owner 常州长海焊材有限公司
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