High-temperature high-strength nuclear power nickel-based welding wire free of crack defects and preparation and application thereof

Abstract

The invention belongs to the technical field of welding materials and particularly relates to a high-temperature high-strength nuclear power nickel-based welding wire free of crack defects and preparation and application thereof. The high-temperature high-strength nuclear power nickel-based welding wire is composed of, by weight, 28.0-31.0% of Cr, 7.0-11.0% of Fe, 0-0.04% of C, 0-1.0% of Mn, 0-0.15% of Si, 0-0.5% of Ti, 0-0.4% of Al, 2.0-4.0% of Mo, 1.5-2.5% of Nb, 0-0.005% of S, 0-0.005% of P, 0-0.005% of O, 0-2ppm of H, 0-0.02% of N, 0-0.005% of Ca, 0-0.005% of Mg, 0-0.02% of Ta, 0-0.02% of Cu, 0-0.02% of Co and the balance Ni, specifically, Al+Ti<=0.8%. The high-temperature high-strength nuclear power nickel-based welding wire can meet development requirements of a nuclear power station and improve material performance of primary equipment of a nuclear island, the ductility dip cracking resistance of the welding wire is better than that of an ERNiCrFe-7A welding material adopted in the existing nuclear island primary equipment manufacturing process, the product repair rate is decreased, and the manufacturing cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of welding materials, in particular to a high-temperature, high-strength, crack-free nickel-based welding wire for nuclear power and a preparation method and use method thereof. Background technique [0002] my country is currently vigorously developing the nuclear power industry. The third-generation nuclear power technology is the mainstream nuclear power technology adopted by the currently developed nuclear power plants, and the service life is required to be extended from 40 years to 60 years. Therefore, higher requirements are put forward for the materials of the main equipment of the nuclear island. [0003] Inconel FM 52M (ERNiCrFe-7A) welding wire is currently the most widely used nickel-based welding material in the manufacture of nuclear island main equipment, and it has excellent corrosion resistance. The nickel-based welding wire often has a high-temperature loss of plastic crack (DDC) during th...

AI Technical Summary

Problems solved by technology

The nickel-based welding wire often has a high-temperature loss of plastic crack (DDC) during the welding process of the main equipment of the nuclear island. Due to its small size, it is difficult to detect it completely by X-rays, but it often becomes the inducer of other failure behaviors. source, which is very harmful to the safe service of the main equipment of the nuclear island

The development of nuclear power plants has further improved the performance requirements of the main equipment and materials of the nuclear island. The 52M welding wire currently used in large quantities needs to be further improved in its high temperature performance and crack resistance.

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