Manufacturing method of nuclear-grade austenitic stainless steel welding wire

Abstract

The invention discloses a nuclear-grade austenitic stainless steel welding material. The material deposited metal has high low-temperature strength, low-temperature toughness, low-temperature non-magnetism and good neutron irradiation resistance performance, and comprises the following chemical constituents in percentage by weight: 18.00-20.0 percent of Cr, 12.00-14.00 percent of Ni, 2.00-3.00 percent of Mo, 0.06-0.15 percent of N, less than or equal to 0.03 percent of C, 1.00-2.50 percent of Mn, less than or equal to 1.00 percent of Si, 0.01-0.10 percent of Nb, 0.01-0.10 percent of Ta, less than or equal to 0.10 percent of Co, less than or equal to 0.03 percent of P, less than or equal to 0.005 percent of S, less than or equal to 0.0018 percent of B and the balance of iron and impurities generally existing in steelmaking, wherein the Val(Cr-Ni) value is less than 16. The material can be used for welding nuclear-grade materials for manufacturing forgings, plates, tubes and the like.

Description

[0001] technical field [0002] The present invention relates to nuclear-grade austenitic stainless steel welding consumables, in particular to such an austenitic stainless steel alloy composition that combines high low-temperature strength, low-temperature toughness, low-temperature non-magnetism and good neutron radiation resistance . [0003] Stainless steel alloys, especially corrosion-resistant nickel-chromium series austenitic stainless steel alloys, are widely used in the preparation of nuclear fission reactor components due to their good corrosion resistance, mechanical properties and stability of austenite structure, such as Reactor internals, boron injection tanks, spent nuclear fuel storage and transportation devices, and nuclear fuel pools. Since the use environment of such application fields is high temperature and high pressure environment, austenitic stainless steel is generally required to have good mechanical properties at room temperature and 350 °C, and goo...

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Problems solved by technology

[0006] From the analysis of the comparative patents, it can be seen that the comparative patents improve the low-temperature strength of the alloy by increasing manganese, chromium, nitrogen and adding niobium, but there is no impact on the magnetic properties and neutron radiation resistance of the material while increasing the strength control

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