Gas protection welding wire for nuclear power steel containment vessel

Abstract

The invention provides a gas protection welding wire for a nuclear power steel containment vessel and belongs to the field of welding materials. The gas protection welding wire comprises, by mass, 0.07%-0.12% of C, 1.10%-1.60% of Mn, 0.25%-0.55% of Si, 0.80%-1.40% of Ni, at most 0.025% of S, at most 0.025% of P, at most 0.20% of Cr, 0.10%-0.30% of Mo, at most 0.50% of Cu, and the balance iron and inevitable impurities. The gas protection welding wire is low in cost, welding arcs are stable, welding spatter is slight, welding seams are formed neatly, obtained deposited metal and welded joints are high in comprehensive mechanical performance in the welded condition, low-temperature impact performance is high, and tenacity is extremely high. The gas protection welding wire can be widely applied to steel structure welding in nuclear power engineering.

Description

technical field [0001] The invention belongs to the field of welding materials, in particular to a gas-shielded welding wire used for nuclear power steel containment shells. Background technique [0002] As a clean energy, nuclear power is of great strategic significance to meet China's electricity demand, optimize energy structure, reduce environmental pollution, and promote sustainable economic and energy development. [0003] Nuclear power, as a new type of alternative energy that is currently economical and effective and has been truly commercialized, has no doubts about its development potential. At this stage, my country is in the trend of mass application of clean energy such as nuclear power, and nuclear power projects will be the focus of my country's future clean energy development. [0004] The third-generation nuclear power plant currently under construction in our country has absorbed the operational experience of the second-generation nuclear power technology ...

AI Technical Summary

Problems solved by technology

[0005] At present, the steel containment vessels used in the third-generation nuclear power plants are mainly made of SA738Gr.B steel and other materials, but there is currently no welding wire specifically for this type of steel, and only other types of welding wire can be used for welding. The disadvantages of high cost and uneven welding quality have affected the progress of the third-generation nuclear power plant project to a certain extent.

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