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Thick steel for supporting nuclear steam generator and production method of thick steel

A steam generator and thick gauge technology, which is applied to the support steel and production field of thick gauge nuclear power steam generators, can solve the problems such as whether the performance of the steel plate not involved in the rolling process can meet the requirements, etc., and achieves segregation and inclusions in the core Improvement in grade reduction, reduction in production cost, effect of high strength level

Active Publication Date: 2018-09-18
ANGANG STEEL CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the invention only mentions the production method of combining forging and rolling, and does not involve the rolling process after steel ingot forging and whether the performance of the produced steel plate can meet the requirements

Method used

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  • Thick steel for supporting nuclear steam generator and production method of thick steel
  • Thick steel for supporting nuclear steam generator and production method of thick steel
  • Thick steel for supporting nuclear steam generator and production method of thick steel

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Embodiment Construction

[0041] The present invention will be described in detail below in conjunction with the accompanying drawings, but it should be pointed out that the implementation of the present invention is not limited to the following embodiments.

[0042] Steel for support of nuclear power steam generator in thick gauge contains the following chemical composition by weight percentage:

[0043] C 0.14%~0.20%, Si 0.25%~0.40%, Mn 0.30%~0.40%, P≤0.008%, S≤0.002%, Mo 0.30%~0.60%, Ni 1.20%~2.00%, Cr 0.80%~1.50 %, V 0.01% to 0.03%, Al 0.015% to 0.030%, and the rest are Fe and unavoidable impurities.

[0044] The production method of steel for support of nuclear power steam generator with thick specification comprises the following steps:

[0045] 1) Smelting:

[0046] Steel plate with a thickness of 80-120mm is continuously cast by converter: low P and low S molten iron is selected, P≤0.07% S≤0.03% in molten iron; LF furnace makes white slag to refine molten steel to ensure that [S]≤0.003% in st...

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Abstract

The invention relates to thick steel for supporting a nuclear steam generator and a production method of the thick steel. The thick steel comprises the following chemical components of, by weight percentage, 0.14% to 0.20% of C, 0.25% to 0.40% of Si, 0.30% to 0.40% of Mn, smaller than or equal to 0.008% of P, smaller than or equal to 0.002% of S, 0.30% to 0.60% of Mo, 1.20% to 2.00% of Ni, 0.80% to 1.50% of Cr, 0.01% to 0.03% of V, 0.015% to 0.030% of Al and the balance Fe and inevitable impurities. The thick steel has the advantages that the steel type provided by the invention is relativelyhigh in strength level after being tempered, and the temperature impact absorbed energy and the section fiber fraction of the series of steel type in the tempered state are also kept at a relatively high level.

Description

technical field [0001] The invention belongs to the technical field of steel plate production, and in particular relates to a support steel for thick gauge nuclear power steam generators and a production method. Background technique [0002] Nuclear power is an efficient, low-carbon, clean high-quality energy, and a strategic high-tech industry. Nuclear power is also a major measure to adjust the energy structure, ensure energy supply, and address climate change. After 30 years of development, China's nuclear power development has made great achievements. The scale of China's nuclear power operation continues to expand. There are currently 36 operating nuclear power units and 20 nuclear power units under construction. The number of nuclear power units under construction ranks first in the world. [0003] The nuclear power steam generator is one of the most critical equipment of the nuclear power plant. The steam generator is connected to the reactor pressure vessel, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/46C22C38/06C22C33/04C21D8/02C21D1/18
CPCC21D1/18C21D8/0221C21D8/0226C21D8/0263C21D2211/002C22C33/04C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46
Inventor 王爽胡海洋颜秉宇孙殿东段江涛李黎明王勇李叶忠隋松言欧阳鑫
Owner ANGANG STEEL CO LTD
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