A high-toughness seamless submerged arc flux-cored welding wire for 460mpa steel

A seamless submerged arc, flux cored wire technology, applied in welding equipment, welding media, welding/cutting media/materials, etc., can solve the problem of no seamless submerged arc flux cored wire, etc., to improve low temperature toughness and tensile strength strength, increased tensile strength, effect of toughening weld metal

Active Publication Date: 2019-10-25
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

[0004] At present, there is no seamless submerged arc flux-cored welding wire and related content that can be used for welding high-strength steel with a yield strength of 460MPa

Method used

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  • A high-toughness seamless submerged arc flux-cored welding wire for 460mpa steel
  • A high-toughness seamless submerged arc flux-cored welding wire for 460mpa steel
  • A high-toughness seamless submerged arc flux-cored welding wire for 460mpa steel

Examples

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Embodiment 1

[0018] Examples 1-5 are high-toughness seamless submerged arc flux-cored welding wires suitable for 460MPa steel. The filling rate of Example 1 is 9.5%, and the diameter of the welding wire is 3.2mm. In Example 2, the filling rate is 12%, and the wire diameter is 4.0mm. In Example 3, the filling rate is 14%, and the wire diameter is 5.0mm. The composition of the drug core powder used in Examples 1 to 5 is shown in Table 1.

[0019] Table 1 Chemical composition (mass fraction, %) of the drug core powder of the embodiment of the present invention

[0020]

[0021] Example of implementation effect

[0022] For the three kinds of welding wire prepared above and SR-SJ613 flux, according to the national standard GB / T 5118-2012, the chemical composition analysis of the deposited metal, the mechanical performance test of the deposited metal and the determination of the hydrogen content of the deposited metal were carried out. Taking Φ4.0mm welding wire as an example, the weldin...

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Abstract

The invention relates to a high toughness seamless submerged-arc flux-cored wire for 460MPa steel. The high toughness seamless submerged-arc flux-cored wire for 460MPa steel is composed of a peripheral mild-carbon steel strip and flux-cored wire powder inside. The flux-cored wire powder comprises the following components in percentages by mass: 8-13% of nickel powder, 0.5-1.5% of ferromolybdenum, 12-20% of manganese metal, 3-7% of rare earth silicon iron, 2-5% of ferrotitanium, 1-3% of ferroboron, 0.5-1% of sodium fluoroaluminate, 1-2% of fluorite and the balance of iron powder and inevitable impurities. The seamless submerged-arc flux-cored wire provided by the invention is matched with fluoride-basic type sintered flux SR-SJ613, the Charpy impact energy reaches 110J or above at 40 DEG C below zero, diffusible hydrogen is smaller than or equal to 5ml / 100g, and the high toughness seamless submerged-arc flux-cored wire can be used for welding 460MPa steel.

Description

technical field [0001] The invention relates to the field of welding materials, in particular to a high-toughness seamless submerged arc flux-cored welding wire for 460MPa steel. Background technique [0002] The service environment of marine engineering structures is harsh, the thickness of the steel plates used is generally thick, the restraint stress is large during welding, and the sensitivity to cold cracks is high, so higher requirements are put forward for welding materials, which need to have good low temperature toughness and good crack resistance . When welding 460MPa or higher-strength steel plates, the requirements for the diffusible hydrogen content of the weld metal are more stringent. When welding some important structures in foreign automatic submerged arc welding, seamless submerged arc flux-cored wire is generally used. At present, domestic automatic submerged arc welding uses The welding wire generally adopts solid welding wire. Compared with the solid w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30
CPCB23K35/3073
Inventor 朱官朋亢天佑徐飞方子春
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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