Steel for gate of extra-thick nuclear reactor containment, and manufacturing method thereof

A nuclear reactor and manufacturing method technology, applied in the field of material processing, can solve the problems that the strength of the steel plate cannot meet the steel requirements for containment gates, and the compression ratio requirements, etc., and achieve novel and unique production technology, uniform and stable low-temperature toughness, and high strength Effect

Active Publication Date: 2019-04-30
ANGANG STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The patent "A Production Method for Extra-Thick Steel Plate" (application number: 200910187778.7) is produced by continuous casting slabs with a thickness of 300 mm. The disadvantage is that if a steel plate with a thickness of 130 mm is rolled, the compression rati

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  • Steel for gate of extra-thick nuclear reactor containment, and manufacturing method thereof
  • Steel for gate of extra-thick nuclear reactor containment, and manufacturing method thereof
  • Steel for gate of extra-thick nuclear reactor containment, and manufacturing method thereof

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Embodiment Construction

[0035] Below by embodiment the present invention will be further described.

[0036] In the embodiment of the present invention, according to the composition ratio of the technical solution, billeting of the steel ingot—rolling of the intermediate billet—heat treatment is carried out.

[0037] Steel ingot billeting: heat the steel ingot to 1200°C-1250°C for 5h-9h and then carry out billet rolling. The rolling temperature is ≥1100°C. After the intermediate billet is rolled to a thickness of 330mm-450mm, it will be stacked and slowly cooled. Time ≥ 48h.

[0038] Intermediate billet rolling: after unstacking, the intermediate billet is heated at 1200°C-1250°C, held for 4h-7h, and the rolling start temperature is ≥1100°C. After rolling, the steel plates are stacked and slowly cooled, and the slow cooling time is ≥24h.

[0039] Heat treatment: Quenching temperature is 920°C±20°C, holding time is 1min / mm-4min / mm, and then water-cooled immediately until the temperature of the steel ...

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Abstract

The invention provides steel for a gate of extra-thick nuclear reactor containment, and a manufacturing method thereof. The components of a steel plate include, by weight percentage, 0.08-0.15% of C,0.25-0.50% of Si, 0.90-1.50% of Mn, P <= 0.01%, S which is less than or equal to 0.005%, 0.30-0.60% of Ni, 0.10-0.30% of Cr, 0.10-0.30% of Mo, 0.01-0.05% of V, 0.01-0.05% of Nb, 0.01-0.03% of Al, andNb and V which are less than or equal to 0.08%, with the balance being Fe and inevitable impurities. The manufacturing method includes steel ingot cogging, intermediate billet rolling and heat treatment. The steel plate can be guaranteed to have high intensity while having uniform and stable low-temperature toughness, and the steel plate can still have good comprehensive properties after simulatedwelding and heat treatment.

Description

technical field [0001] The invention belongs to the field of material processing, and in particular relates to an extra-thick steel for nuclear reactor containment gates and a manufacturing method thereof. Background technique [0002] Personnel and equipment gates are the largest auxiliary structural components on the containment of nuclear power plants. They are composed of heads, simplifications, flanges, steel platforms, etc. There are usually two, located at the lower part of the containment, mainly for personnel and large equipment. Transport into and out of the reactor building to provide access. The gate is designed, manufactured and inspected in accordance with "HAF003 Nuclear Power Plant Quality Assurance Safety Regulations", "HAF102 Nuclear Power Plant Design Safety Regulations", "CC-M Pressurized Water Reactor Nuclear Island Mechanical Equipment and Construction Rules", and the maximum thickness is 130mm. As a part of the containment shell, it is safety level 2,...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/46C22C38/48C22C38/06C21D8/02C21D1/18
CPCC21D1/18C21D8/0226C21D8/0263C21D2211/002C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46C22C38/48
Inventor 胡海洋孙殿东王爽颜秉宇李黎明王永才王勇
Owner ANGANG STEEL CO LTD
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