Flux-cored wire

A technology of flux-cored welding wire and powder, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of reducing labor efficiency, porosity defects, and poor porosity resistance, so as to improve anti-porosity performance and enhance Anti-porosity ability, effect of reducing porosity content

Active Publication Date: 2019-12-06
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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  • Flux-cored wire

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Effect test

Embodiment 1

[0032] Embodiment 1 is a flux-cored welding wire disclosed by the present invention, including 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 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 is CaF 2 Mixture with LiBaF;

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

[0036] 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...

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 wire. The flux-cored wire comprises a steel strip and powder which fills the inside of the steel strip; the powder comprises the following components, by weight,of: 35%-50% of rutile, 5%-8% of limestone, 0.4%-0.6% of graphite, 5.5%-8.5% of aluminum oxide, 3.5%-6.5% of magnalium, 2%-5% of fluoride, 1.6%-2.8% of silicomanganese, 4%-8% of boron powder, 3%-6% ofchromium powder, 2.5%-3.5% of nickel powder, 0.8%-2% of titanium powder, 0.5%-1.5% of aluminum powder, 0.1%-0.5% of niobium powder and the balance iron powder. The flux-cored wire provided by the invention improves the air hole formation resistance when the flux-cored wire and parent metals are welded.

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 used as a filler metal or as a metal welding material for electrical conductivity. 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-tungsten arc welding, the wire is both the filler metal and the conductive electrode. Welding wire is generally divided into two categories: solid cored wire and flux-cored wire. The outer layer of flux-cored wire is metal material, and the inner layer is wrapped with powder to meet different welding needs, while solid-cored wire is not wrapped with powder. Flux-cored wire is also called powder core. Welding wire or tubular welding wire, which is divided into two categories: gas-filled protection and non-gas-filled protection. The surface of the flux-cored wire is the...

Claims

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Application Information

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Patent Type & Authority Applications(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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