SA738GrB steel plate for nuclear power plant containment and manufacturing method thereof

A nuclear power plant containment and steel plate technology, applied in the field of iron and steel smelting, can solve the problem of no data on the width, achieve good safety, improve overall performance, and reduce production resource consumption

Inactive Publication Date: 2020-02-14
NANJING IRON & STEEL CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The thickness of the steel plate can be up to 130mm, but there is no data for the width

Method used

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  • SA738GrB steel plate for nuclear power plant containment and manufacturing method thereof
  • SA738GrB steel plate for nuclear power plant containment and manufacturing method thereof
  • SA738GrB steel plate for nuclear power plant containment and manufacturing method thereof

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Embodiment Construction

[0025] A SA738GrB steel plate for nuclear power plant containment, the thickness specification is 101mm, the width specification is 4650mm, its chemical composition and mass percentage are as follows: C≤0.2%, Si: 0.13%~0.6%, Mn: 0.9%~1.6%, Ni≤ 0.6%, Cr≤0.3%, Nb≤0.05%, Mo≤0.35%, V≤0.08%, Ti≤0.03%, the balance is Fe and unavoidable impurities.

[0026]The manufacturing method of the above-mentioned steel plate includes the following steps: molten steel pretreatment-converter smelting-refining-continuous casting-heating-rolling-heat treatment,

[0027] Hot metal desulfurization pretreatment: start temperature 1330~1370℃, end temperature 1320~1350℃, spray magnesium powder 0.3~1.0kg / ton, lime powder 2.5~4.0kg / ton, end S≤0.005%;

[0028] The molten steel is smelted and refined for continuous casting, the superheat of molten steel is 5-25°C, the casting speed is 0.55-0.75m / min, the secondary cooling electromagnetic stirring for continuous casting: current 200-450A, frequency 5-7Hz, l...

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Abstract

The invention discloses a SA738GrB steel plate for nuclear power plant containment, and relates to the technical field of iron and steel smelting. The thickness specification of the steel plate is 101mm, the width specification is 4650mm, and the chemical composition and mass percentage are as follows: C <= 0. 2%, Si = 0.13%-0.6%, Mn = 0.9%-1.6%, Ni <= 0. 6%, Cr <= 0. 3%, Nb <= 0. 05%, Mo <= 0. 35%, V <= 0. 08%, Ti <= 0. 03%, and the balance is Fe and inevitable impurities. The thickness of the finished product is 101 mm and the width is 4650 mm at the same time. The steel plate has the advantages of good strength, toughness, weldability and the like, and meets the use requirements of nuclear power plant containment.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting, in particular to an SA738GrB steel plate for a containment vessel of a nuclear power plant and a manufacturing method thereof. Background technique [0002] At present, nuclear energy is recognized as a clean, efficient and safe energy source. According to the prediction of international authoritative organizations, by 2038, 90 to 300 reactors with a capacity of 1600 MW will be built in the world, and the development of nuclear power will enter a period of rapid growth. my country's nuclear power construction started in the mid-1980s and has developed rapidly. As of 2017, there are 37 nuclear power units in operation in mainland China, and 19 nuclear power units under construction. The number of nuclear power units under construction ranks first in the world. By 2020, my country's nuclear power operation and installed capacity under construction will reach 88 million kilowatts, a...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/08C22C38/12C22C38/18C22C38/14C22C38/38C22C38/28C22C38/26C22C38/24C22C38/22C22C38/58C22C38/50C22C38/48C22C38/46C22C38/44C22C38/40C21C7/064C21D8/02C21D1/18
CPCC22C38/02C22C38/04C22C38/08C22C38/12C22C38/18C22C38/14C22C38/38C22C38/28C22C38/26C22C38/24C22C38/22C22C38/58C22C38/50C22C38/48C22C38/46C22C38/44C22C38/40C21C7/064C21D8/0226C21D1/18C21D2211/002G21C13/087C21D9/46C21D8/0205C21D8/021C21D8/0263C21D1/26C21D1/56C21D8/0247
Inventor 姜在伟李艳梅方磊杨梦奇于生张舒展叶其斌奚艳红
Owner NANJING IRON & STEEL CO LTD
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