Seamless steel tube for nuclear power and production method thereof

Abstract

The invention relates to a seamless steel tube for nuclear power and a production method thereof, belonging to the field of seamless steel tubes. The invention solves the technical problem of providing the seamless steel tube for nuclear power, and the seamless steel tube can reduce 'flow-accelerated corrosion (FAC)'. The seamless steel tube for the nuclear power comprises the following chemical compositions in percentage by weight: 0.17-0.24% of C, 0.17-0.37% of Si, 0.35-0.65% of Mn, 0.18-0.35% of Cr and the balance of Fe and unavoidable impurities. The mechanical property and impact property (20 DEG C, 0 DEG C) and high-temperature instaneous tension of the seamless steel tube for nuclear power can fully satisfy the technical requirements of the seamless steel tube for a conventional island of a nuclear power plant, and the function of 'FAC (flow-accelerated corrosion)' resistance is achieved. The invention provides a novel choice for the seamless steel tube for the conventional island of the nuclear power plant, and has wide application prospect.

Description

technical field [0001] The invention relates to a seamless steel pipe for nuclear power and a production method thereof, belonging to the field of seamless steel pipes. Background technique [0002] At present, my country's electric power industry is in a period of rapid development. According to the requirements of sustainable development of national energy, atomic power generation will be one of the key directions of future energy development due to its advantages of high efficiency, economy and cleanliness. The construction of nuclear power plants is on the rise. [0003] The conventional island of a nuclear power plant is similar to a thermal power plant, including a secondary circuit system composed of main steam pipelines, water supply pipelines, and nuclear steam turbines (using saturated steam to flush the steam turbines). Compared with thermal power plants, the steam operating parameters of the conventional island design of nuclear power plants are not high, under t...

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Problems solved by technology

Compared with thermal power plants, the steam operating parameters of the conventional island design of nuclear power plants are not high, under the creep temperature, the transmission pipeline does not produce creep during use, and the oxidation is minimal, so there is no need to use high creep strength and high resistance. Oxidizing heat-resistant alloy steel, a large number of C-Mn steel pipelines are used for conventional island steam and water pipelines, but compared with thermal power units of the same power, the flow rate of the medium in the pipe is high and the flow rate is large (about 1.3 to 1.6 times)

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