Steel having excellent irradiation resistance and used for steel lining of nuclear power plant, and manufacturing method thereof

A manufacturing method and anti-irradiation technology, which is applied in the field of steel for nuclear power plant steel lining and its manufacturing, can solve the problems of unfavorable anti-irradiation performance of steel, increase of production cost, low purity of steel, etc., and achieve excellent anti-irradiation Embrittlement performance, low cost, and effects of less inclusions

Inactive Publication Date: 2018-10-16
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent, the steel plate is produced by controlled rolling and controlled cooling + coiling. The steel has low purity, high alloy content, and poor low temperature toughness.
The alloying elements Cr (0.15-0.6%), Nb (0.01-0.04%) and Ti (0.008-0.03%) are added to its composition, which is not only detrimental to the radiation resistance of the steel, but also increases the production cost
[0006] Patent CN 103911559 B "a steel plate for nuclear power plant pressure vessel and its manufacturing method" application number: 2

Method used

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  • Steel having excellent irradiation resistance and used for steel lining of nuclear power plant, and manufacturing method thereof
  • Steel having excellent irradiation resistance and used for steel lining of nuclear power plant, and manufacturing method thereof
  • Steel having excellent irradiation resistance and used for steel lining of nuclear power plant, and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In the production method of Example 1, the molten steel is smelted in a converter, refined outside the furnace, and cast into a continuous casting slab. In continuous casting, the superheat of the tundish is 21°C, and the casting speed is 1.7m / min. See Example 1 in Table 1 for the smelting composition, Table 2 for the heating and rolling process of the continuous casting slab, Table 3 for the heat treatment process, and Table 4 for the mechanical properties.

[0037] Table 2 Heating and rolling process

[0038]

[0039] Table 3 heat treatment process

[0040]

[0041] Table 4 Mechanical properties of steel plates

[0042]

[0043] After normalizing, the 8mm steel plate meets the requirements of the RCC-M specification, and the steel plate has good comprehensive mechanical properties.

Embodiment 2

[0044] In the production method of embodiment 2, the molten steel is smelted in a converter, refined outside the furnace, and cast into a continuous casting slab. In continuous casting, the superheat of the tundish is 22°C, and the casting speed is 1.8m / min. The smelting composition is shown in Example 2 in Table 1, the continuous casting slab heating and rolling process is shown in Table 5, the heat treatment process is shown in Table 6, and the mechanical properties are shown in Table 7.

[0045] Table 5 Heating and rolling process

[0046]

[0047] Table 6 heat treatment process

[0048]

[0049] Table 7 Mechanical properties of steel plates

[0050]

[0051] After the 12mm steel plate is normalized and simulated post-weld heat treatment, all performance indicators meet the requirements of the RCC-M specification, and the steel plate has good comprehensive mechanical properties.

Embodiment 3

[0052] In the production method of embodiment 3, the molten steel is smelted in a converter, refined outside the furnace, and cast into a continuous casting slab. In continuous casting, the superheat of the tundish is 22°C, and the casting speed is 1.5m / min. See Example 3 in Table 1 for the smelting composition, Table 8 for the heating and rolling process of the continuous casting slab, Table 9 for the heat treatment process, and Table 10 for the mechanical properties.

[0053] Table 8 Heating and rolling process

[0054]

[0055] Table 9 heat treatment process

[0056]

[0057] Table 10 Mechanical properties of steel plates

[0058]

[0059] The yield strength and tensile strength of 16mm steel plate after normalizing treatment are 360MPa and 504MPa respectively, and the impact energy absorbed at -20°C reaches 260J; The absorbed energy reaches 270J (yield strength ≥ 265MPa, tensile strength: 410-530MPa). After normalizing and simulated post-weld heat treatment, th...

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Abstract

The invention relates to steel having excellent irradiation resistance and used for a steel lining of a nuclear power plant. The steel comprises the following components by weight: 0.10 to 0.20% of C,0.20 to 0.45% of Si, 0. 80 to 1.50% of Mn, no more than 0.01% of P, no more than 0.008% of S, 0.02 to 0.05% of Alt, 0.01 to 0.03% of V, no more than 0.006% of N, no less than 2 of Alt/N, no more than1.5 ppm of [H], no more 30 ppm of [O], no more than 0.005% of Cu, no more than 0.005% of As, no more than 0.001% of B, no more than 0.002% of Sb and no more than 0.002% of Sn. A steel plate manufactured by using a method provided by the invention has the advantages of low cost, excellent irradiation resistance, uniform structure, fine crystal grains, few and small inclusions, stable mechanical properties, excellent process performances, and performances meeting the technical requirements of the steel used for the steel lining of the nuclear power plant; and no precious elements like Ni, Cr, Mo, Nb and Ti are added, so production cost is reduced, and excellent resistance to irradiation embrittlement of the steel plate is guaranteed.

Description

technical field [0001] The invention relates to ferrous metal materials, in particular to a steel for nuclear power plant steel lining with excellent radiation resistance and a manufacturing method thereof. Background technique [0002] CPR1000 is China's improved million-kilowatt (1000MW) pressurized water reactor nuclear power technology program launched by China Guangdong Nuclear Power Group Co., Ltd. It is based on the introduction, digestion and absorption of foreign advanced technology, combined with more than 20 years of gradual improvement and independent innovation to form the "second generation plus" million-kilowatt-level pressurized water reactor nuclear power technology. With advanced design concepts and excellent safety performance, this technology is widely used in new nuclear power units in my country. [0003] The nuclear island in this type of nuclear power plant is protected by three barriers, including nuclear fuel element cladding, reactor primary loop ...

Claims

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Application Information

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IPC IPC(8): C22C38/04C22C38/02C22C38/06C22C38/12C21D8/02C21D1/28
CPCC22C38/04C21D1/28C21D8/0226C21D8/0247C21D2211/001C22C38/02C22C38/06C22C38/12
Inventor 胡海洋孙殿东王永才颜秉宇王爽王勇王小强
Owner ANGANG STEEL CO LTD
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