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An ultra-low-hydrogen high-toughness metal powder-cored seamless flux-cored wire for all-position welding

A seamless flux-cored welding wire, ultra-low hydrogen technology, applied in welding equipment, welding medium, metal processing equipment, etc., can solve the problem that the welding wire cannot be protected by mixed gas, and achieve stable mechanical properties, good welding processability, resistance to Moisture-absorbing effect

Active Publication Date: 2019-03-15
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the above problem that the existing welding wire cannot be protected by mixed gas, and provide an ultra-low hydrogen high toughness metal powder cored seamless flux-cored welding wire for all-position welding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: The drug core powder consists of 10% low-carbon ferromanganese, 20% atomized ferrosilicon, 3% rutile, 1% cryolite, 3% atomized nickel powder, 1% quartz, 2% feldspar, and the balance is iron pink. The filling rate is 16%, and the wire diameter is 1.2mm.

Embodiment 2

[0019] Example 2: The drug core powder consists of 15% low-carbon ferromanganese, 18% atomized ferrosilicon, 5% rutile, 1.5% cryolite, 2% atomized nickel powder, 1.5% quartz, 0.5% feldspar, and the balance is iron pink. The filling rate is 14%, and the wire diameter is 1.0mm.

Embodiment 3

[0020] Example 3: The drug core powder consists of 12% low-carbon ferromanganese, 15% atomized ferrosilicon, 2% rutile, 5% cryolite, 1% atomized nickel powder, 2% quartz, 1.5% feldspar, and the balance is iron pink. The filling rate is 17%, and the wire diameter is 1.6mm.

[0021] The preparation method of the metal powder-cored seamless flux-cored wire of the present invention is as follows: the sheath is made of ordinary low-carbon steel strip, and the chemical composition and properties are shown in Table 2 and Table 3. The chemical composition and mechanical properties of the welding wire deposited metal are shown in Table 4 and Table 5. The diffusible hydrogen content of deposited metal is shown in Table 6.

[0022] Table 1 The chemical composition (% by weight) of the metal powder cored seamless flux cored wire flux core powder of the embodiment of the present invention

[0023]

Low carbon ferromanganese

Atomized ferrosilicon

rutile

cryolite ...

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Abstract

The invention provides an ultralow-hydrogen and high-tenacity metal powder core type seamless flux-cored welding wire for all-position welding. The seamless flux-cored welding wire comprises outer skin and flux core powder, wherein the inner part of the outer skin is filled with the flux core powder, and the outer skin is a low-carbon steel band. The seamless flux-cored welding wire is characterized in that the flux core powder comprises the following components in a percent by weight: 10-15% of low-carbon ferromanganese, 15-20% of atomized ferrosilicon, 2-5% of rutile, 1-5% of cryolite, 1-3% of atomized nickel powder, 1-2% of quartz, 0.5-2% of feldspar and the balance of iron powder. The seamless flux-cored welding wire is suitable for the all-position welding of carbon steel and low-alloy steel which are welded under the protection of mixed gas containing 75-85% of Ar and 15-25% of CO2. The seamless flux-cored welding wire is great in welding machinability, stable in mechanical properties, great in crack resistance, low in hydrogen dispersion and high in moisture absorbability and can be used for all-position welding.

Description

technical field [0001] The invention relates to the field of welding materials, in particular to an ultra-low-hydrogen high-toughness metal powder-cored seamless flux-cored welding wire for all-position welding. Background technique [0002] Metal powder flux-cored welding wire is a new trend in international development in recent years. At present, Japan and the United States have taken the less-slag-type metal powder flux-cored welding wire as one of the focuses of research and development. Metal powder type flux cored wire is relative to slag type flux cored wire, most of its flux core is metal powder (iron powder, deoxidizer), only a small amount of arc stabilizer and slagging agent. The reason why it is evaluated as "a welding material that replaces solid wire" is that it combines the advantages of a solid wire with less slag content with the advantages of a high deposition rate, excellent weld bead formation, and a low-spatter type flux-cored wire. , and the hydrogen ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/12B23K35/368
CPCB23K35/0266B23K35/368
Inventor 郭纯李猛张学杰
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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