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Thick steel plate for nuclear power plant containment and manufacture method thereof

A nuclear power plant containment and manufacturing method technology, which is applied in the field of thick steel plate and its manufacturing, can solve the problems that cannot fully meet the requirements of the new containment, and achieve the effects of good toughness, good weldability, and fine and uniform grains

Inactive Publication Date: 2012-11-07
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing steel grades cannot fully meet the requirements of the new type of containment

Method used

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  • Thick steel plate for nuclear power plant containment and manufacture method thereof
  • Thick steel plate for nuclear power plant containment and manufacture method thereof
  • Thick steel plate for nuclear power plant containment and manufacture method thereof

Examples

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Embodiment Construction

[0041] The technical solution of the present invention will be further described below in conjunction with Examples 1-10, but this description does not constitute a limitation of the present invention.

[0042] Manufacture thick steel plates for nuclear power plant containment according to the present invention according to the following steps (see Table 2 for the chemical element ratio of each steel plate in Examples 1-10, and see Table 3 for specific process parameters in Examples 1-10):

[0043] 1) Smelting and casting;

[0044] 2) Heating the billet to 1100-1250°C for austenitization, and controlling the time when the center of the billet is above 900°C for not less than 120 minutes.

[0045] 3) Rolling: the total deformation is greater than 80%, and the deformation per pass is greater than 8%;

[0046] 4) Quenching: The quenching temperature is 880-960°C, and the heat preservation is sufficient to make the temperature of the inside and outside of the steel plate consiste...

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Abstract

The invention discloses a thick steel plate for a nuclear power plant containment. The nuclear power plant containment is 10-60mm in thickness. The thick steel plate comprises, by mass percent, 0.06-0.15% of C, 0.10-0.40% of Si, 1.0-1.5% of Mn, 0.10-0.30% of Mo, not more than 0.012% of P, not more than 0.003% of S, 0.015-0.050% of Al, 0.20-0.50% of Ni, and at least one of not more than 0.05% of V, not more than 0.03% of Ti, not more than 0.25% of Cr, not more than 0.03% of Nb, and 0.0005-0.0050% of Ca, and the balance Fe and other inevitable impurity. Correspondingly, the invention further discloses a manufacture method of the thick steel plate for the nuclear power plant containment. The thick steel plate for the nuclear power plant containment is high in rigidity, high in toughness, fine in impact toughness of base metal and heat affected zone at low temperature, and suitable for application in the manufacture field of nuclear power plant containments.

Description

technical field [0001] The invention relates to a steel grade and a manufacturing method thereof, in particular to a thick steel plate and a manufacturing method thereof. Background technique [0002] The world today is facing the contradiction between increasing energy demand and climate warming, and the development of nuclear energy is an important choice to solve energy problems. The safety requirements of the new generation of nuclear power plants have been greatly improved, and many different requirements have been put forward for the steel materials used to manufacture nuclear power plants. [0003] The containment is an important part of the pressurized water reactor nuclear power plant. It is the protective shell of the nuclear island equipment of the nuclear power plant and the last safety barrier to prevent the leakage of radioactive materials. Most of the existing pressurized water reactor nuclear power plants adopt the containment structure of "reinforced concre...

Claims

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Application Information

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IPC IPC(8): C22C38/12C22C38/14C22C38/44C22C38/50C21D8/02
Inventor 张汉谦刘慧斌
Owner BAOSHAN IRON & STEEL CO LTD
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