Shockproof strip material of nuclear power station steam generator, and preparation method thereof

Abstract

The invention discloses a shockproof strip material of a nuclear power station steam generator, and a preparation method thereof, in particular to a shockproof strip material of a pressurized water reactor nuclear island CPR 1000 steam generator. The shockproof strip material comprises the components by weight percent: 0.02-0.07% of C, 0.2-1.0% of Si, 0.3-0.8% of Mn, less than or equal to 0.04% of P, less than or equal to 0.03% of S, 11.5-13.5% of Cr, 0.2-0.6% of Ni, less than or equal to 0.05% of N, 0.01-1.0% of Xt as well as balance Fe and unavoidable impurities. The preparation method of the shockproof strip material comprises: preparation of the raw materials, smelting by a vacuum refining furnace, refining the electroslag, forging, hot rolling, normalizing, multi-channel (drawing-annealing-drawing), and thereby obtaining the finished product of the shockproof strip material. The shockproof strip material of the nuclear power station steam generator is reasonable in component design, has excellent corrosion resistance, anti-fatigue property, creep resistance and processing performance, and has important economic significance for improving the production efficiency, prolonging the service life of the nuclear power station steam generator and reducing the production cost.

Description

technical field [0001] The invention relates to a shockproof strip material in the technical field of new materials, in particular to a shockproof strip material for a steam generator in a nuclear power plant and a preparation method thereof. Specifically, it relates to a martensitic stainless steel X6Cr13 material, which is mainly used as a shockproof bar material for a CPR1000 steam generator of a pressurized water reactor nuclear island. 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 important part of today's energy development. leading direction. Compared with thermal power generation and other new energy sources, nuclear power has ...

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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