High-strength high-ductility submerged-arc welding wire

A submerged arc welding wire, high-strength technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., to achieve the effect of excellent comprehensive mechanical properties, low cost, and simple composition design

Inactive Publication Date: 2012-07-04
SHANGHAI ATLANTIC WELDING CONSUMABLES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the welding materials used by steel structure and engineering machine manufacturers can only meet the welding of low-alloy steels with Q490 and Q590 strength levels. With the increasing application of low-alloy high-strength steels with Q690 strength levels, it is urgent to develop a high-strength and high-toughness welding material. Submerged arc welding wire

Method used

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  • High-strength high-ductility submerged-arc welding wire

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Embodiment Construction

[0005] The deposited metal with excellent comprehensive mechanical properties is obtained by using the submerged arc welding wire of the embodiment of the present invention and welding with SJ606 flux. We require steel mills to provide 6.5mm hot-rolled wire rods according to the set welding wire composition requirements. Our company finally makes 4.0mm submerged arc welding wires through drawing and copper plating. The chemical components of the welding wires are listed in Table 1. The preparation of the welding wires is in the existing Manufactured under equipment and technical conditions. The test plate for welding is Q690, with a thickness of 20mm; the size of the welding groove, sampling position and test method are all in accordance with the national standard GB / T 12470. The test results are listed in Table 2.

[0006] Table 1

[0007] Numbering

C

mn

Si

Cr

Ni

Mo

S

P

1

0.062

1.83

0.545

0.45...

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Abstract

A high-strength high-ductility submerged-arc welding wire belongs to the field of welding materials and is particularly applicable to welding for Q690-grade steel. The high-strength high-ductility submerged-arc welding wire is characterized in that chemical components of the welding wire (wt%) include less than or equal to 0.12% of C (carbon), 1.40-1.90% of Mn (manganese), 0.20-0.60% of Si (silicon), less than or equal to 0.015% of S (sulfur), less than or equal to 0.020% of P (phosphorus), less than or equal to 0.60% of Cr (chromium), 1.80-2.80% of Ni (nickel), 0.25-0.65% of Mo (molybdenum), less than or equal to 0.25% of Cu (copper), proper added Ti (titanium) and the balance Fe (ferrum). Compared with the prior art, the submerged-arc welding wire is simple and reasonable in component design, is matched with an SJ606 flux deposited metal and has excellent comprehensive performances, the tensile strength of the submerged-arc welding wire is higher than 760MPa, the yield strength of the submerged-arc welding wire is higher than 690MPa, and impacting energy at the temperature of -40 DEG C is higher than 69J.

Description

technical field [0001] The invention belongs to the field of welding materials. Suitable for welding of Q690 grade steel, with high yield strength, tensile strength and excellent low temperature impact toughness. Background technique [0002] With the development of structural steel towards high-strength grades, low-alloy high-strength steels with Q690 strength grades are increasingly used in construction machinery, port machinery, marine engineering and other fields. Based on the safety factor of steel structure, it is required that the weld seam has high yield strength, tensile strength and excellent low temperature toughness at the same time, but at the same time it is required to reduce the weight of the equipment itself. Therefore, low-alloy high-strength steel is more and more used in steel structures, Construction machinery manufacturing field. In the past, the welding materials used by steel structure and engineering machine manufacturers can only meet the welding ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30
Inventor 吴平
Owner SHANGHAI ATLANTIC WELDING CONSUMABLES
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