Shockproof strip end-plate material of vapor generator of nuclear power plant and preparation method thereof

Abstract

The invention discloses a shockproof strip end-plate material of a vapor generator of a nuclear power plant and a preparation method thereof, relating to a shockproof strip end-plate material of a vapor generator of a pressurized water reactor nuclear island CPR1000. The shockproof strip end-plate material is prepared from the following components in percentage by weight: 0.003-0.08 percent of C, 0.1-0.4 percent of Si, 0.3-0.8 percent of Mn, not more than 0.015 percent of P, not more than 0.01% of S, 14-17 percent of Cr, 72-78 percent of Ni, 0.05-0.5 percent of Cu, 0.05-0.5 percent of Ti, 0.05-0.5 percent of Al, 6-10 percent of Fe, 0.01-1.0 percent of Xt and the balance of inevitable impurities. The preparation method of the shockproof strip end-plate material comprises the following steps of: preparing raw materials; smelting in a vacuum refining furnace; refining electroslag; forging; thermally rolling; normalizing; and repeating the process of drawing-annealing- drawing) many times to obtain a finished product of shockproof strip end-plate material. The designed shockproof strip end-plate material of the vapor generator of the nuclear power plant has reasonable content design, excellent resistance of corrosion, fatigue and creep properties and processing performance and has very important economic meaning to improve the production efficiency, effectively prolong the service life of the vapor generator of a nuclear power plant and decrease the production cost.

Description

technical field [0001] The invention relates to a shockproof strip end plate material in the technical field of new materials, in particular to a shockproof strip end plate material for a steam generator in a nuclear power plant and a preparation method thereof. Specifically, it relates to an NC15Fe material, which is mainly used as an end plate material of an anti-vibration bar of a CPR1000 steam generator of a pressurized water reactor nuclear island, and can also be used as a material for a connecting pin of an anti-vibration bar and a material for a fixing ring of an anti-vibration bar. Background technique [0002] The energy industry is the foundation of the national economy and an important link that restricts the sustained and rapid development of the national economy. With the development of the national economy, people have higher and higher requirements for living standards and environmental protection. Therefore, vigorously developing nuclear power has become an i...

AI Technical Summary

Problems solved by technology

A nuclear power plant needs to be equipped with several steam generators, which contain tens of thousands of heat transfer tubes. High-temperature pressurized water flows in the tube bundle, and the supply water flows along the tubes in a vertical direction, while being heated and then vaporized. The steam enters the steam turbine to generate electricity, and the fluid in contact with these tubes will cause vibrations, which will cause the tubes to be damaged and rupture, resulting in damage to the steam generator. It will cost about 200 million US dollars to replace a steam generator, and several reactors need to be shut down months, resulting in huge economic losses

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