High-performance nickel base special welding wire

A welding wire, nickel-based technology, applied in the field of CO2 gas shielded nickel-based flux-cored welding wire for ships and marine engineering alloy steels, can solve the problems of accelerating weld corrosion, and achieve the effect of high strength and good plasticity

Inactive Publication Date: 2017-04-19
DANYANG HUALONG SUPERIOR STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are many occasions where Ni-Cr alloy steel is used in ships and marine engineering, and its natural immersion potential in seawater is higher than that of B-grade hull steel of C-Mn alloy system. 2 Gas-shielded flux-cored wire is used for welding, and the weld metal potential is lower than that of Ni-Cr alloys. As a result, a corrosion galvanic couple in which the base metal is a large cathode and the weld is a small anode is formed in seawater, which will inevitably accelerate the corrosion of the weld.

Method used

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  • High-performance nickel base special welding wire
  • High-performance nickel base special welding wire
  • High-performance nickel base special welding wire

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Embodiment

[0045] According to the chemical composition and production process requirements of the flux-cored wire core powder of the present invention, three batches of nickel-based flux-cored wires were produced. The base metal and welding process parameters of the three batches of welding wire are shown in Table 2. After welding, the mechanical performance test and seawater natural immersion potential measurement were carried out on the obtained deposited metal. The test results are shown in Table 3.

[0046] Table 1 embodiment——Nickel-based flux-cored wire steel strip composition and flux core composition (weight, %)

[0047]

[0048] Table 2 Example - Nickel-based flux-cored wire welding base metal and welding process parameters

[0049]

[0050] Table 3 Example——Nickel-based flux-cored wire deposited metal properties

[0051]

[0052]

[0053] Note: Charpy impact energy is the average value of five samples.

[0054]

[0055] The flux-cored welding wire made from t...

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Abstract

Disclosed is a high-performance nickel base special welding wire. The content of Ni in the welding wire is 50wt%-54wt%. The flux-cored chemical components ( accounting for the welding wire by weight) of the welding wire include 5.0%-9.0% of sinter fines, 0.21%-0.7% of Fe3O4, 0.15%-1.0% of TiO2, 0.15%-0.5% of Al, 0%-0.4% of Ti, 0.1%-0.5% of Si, 2.0%-3.5% of Mn, 0%-0.4% of Mo, 0.5%-1.1% of Ni, 0.1%-0.4% of Cr, 0%-0.3% of Cu and 1.10%-2.0% of Fe. The combination of the flux-cored chemical components accounts for 13.0%-15.5% of the weight of the welding wire. The flux-cored welding wire prepared by flux-cored power materials prepared and processed according to the formula of the invention can be welded under the protection of gases, and ship and ocean engineering application requirements can be met.

Description

technical field [0001] The invention relates to a nickel-based welding material, in particular to CO 2 Gas-shielded nickel-based flux cored wire. Background technique [0002] There are many occasions where Ni-Cr alloy steel is used in ships and marine engineering, and its natural immersion potential in seawater is higher than that of B-grade hull steel of C-Mn alloy system. 2 Gas-shielded flux cored wire is used for welding, and the weld metal potential is lower than that of Ni-Cr alloy. As a result, a corrosion galvanic couple in which the base metal is a large cathode and the weld is a small anode is formed in seawater, which will inevitably accelerate the corrosion of the weld. In view of this, the natural immersion potential in seawater of the weld formed by the flux-cored wire needs to match that of the Ni-Cr alloy steel. On the other hand, when welding C-Mn alloy-based Class B hull steel with such a flux-cored wire, the potential of the formed weld is higher than th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30
CPCB23K35/3033
Inventor 蒋红军
Owner DANYANG HUALONG SUPERIOR STEEL
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