High-performance and high-temperature-resistant nickel-based special welding wire

Abstract

The invention discloses a high-performance and high-temperature-resistant nickel-based special welding wire. The content of Ni in the welding wire is 60wt%-71wt%; the welding wire is prepared from flux core chemical components in percentage by weight as follows: 5.0%-9.0% of sintering powder, 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; and the combination of the flux core chemical components accounts for 13.0%-15.5% of the weight of the welding wire. With the flux-cored welding wire produced from flux core powder prepared and processed according to the formula, welding can be performed under the gas protection, and the wire meets application requirements of ship and ocean engineering.

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...

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.

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