Nickel-based alloy welding wire for welding dissimilar steel of nuclear island main equipment and preparation and use method

Abstract

The invention provides a nickel-based alloy welding wire for welding dissimilar steel of nuclear island main equipment and a preparation and use method, and belongs to the field of welding materials.The nickel-based high-temperature alloy welding wire comprises the following components of, in percentage by weight, C less than or equal to 0.04%, 28.00%-31.50% of Cr, Mo less than or equal to 0.50%,Co less than or equal to 0.05%, 0.10%-0.30% of Al, 0.10%-0.50% of Ti, 0.0010%-0.0030% of B, 0.40%-0.80% of Nb, N less than or equal to 0.002%, Si less than or equal to 0.10%, 0.50%-1.00% of Mn, P less than or equal to 0.0050%, S less than or equal to 0.0020%, Cu less than or equal to 0.05%, 8.00%-10.00% of Fe, O less than or equal to 0.002%, H less than or equal to 0.001%, and the balance Ni andinevitable impurity elements. According to the nickel-based alloy welding wire for welding the dissimilar steel of the nuclear island main equipment and the preparation and use method, the componentsof the materials are reasonably configured, the preparation of the welding wire alloy can meet the development requirement of a nuclear power station, the material performance of nuclear power stationequipment can be improved, the room-temperature tensile strength of a deposited metal is larger than or equal to 580 MPa, the 360-DEG C high-temperature tensile strength is larger than or equal to 490 MPa, and the room-temperature impact (work) is larger than or equal to 150 J.

Description

technical field [0001] The invention belongs to the field of welding materials, and in particular relates to a nickel-based alloy welding wire, which is mainly used for the main body of nuclear island main equipment (reactor pressure vessel, steam generator, voltage stabilizer, core replenishment tank, etc.) Low alloy steel) and the safety end of the coolant pipe (material is austenitic stainless steel) welding of dissimilar steel. Background technique [0002] At present, most of the newly started nuclear power plants at home and abroad are the third-generation pressurized water reactor nuclear power plants, such as AP1000 in the United States, EPR in Europe and Hualong No. 1 in China, CAP1400, etc. The material of the main body is high-strength low-alloy steel, and the material of the coolant pipe is austenitic stainless steel. Alloy pipe fittings are pre-welded with a safety end of a section of austenitic stainless steel. Austenitic stainless steel welding consumables h...

AI Technical Summary

Problems solved by technology

At present, the main island equipment and coolant pipeline materials of nuclear power plants have been localized, but there is no corresponding welding consumables, and the welding consumables developed in China are prone to welding cracks in deposited metal. Therefore, a new product suitable for nuclear power main island equipment and cooling Nickel-based alloy welding consumables for dissimilar steels at the safety end of pipe joints connected to chemical pipes

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