Steel for support and hanger of third-generation pressurized water reactor nuclear power plant and manufacturing method thereof

A technology for a pressurized water reactor nuclear power plant and a manufacturing method is applied in the field of steel manufacturing for nuclear power equipment, and can solve the problems of a complex three-stage heating system and low tensile strength of steel plates.

Active Publication Date: 2020-09-29
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The three-stage heating system of the invention is complicated, and the tensile strength of the steel plate is low

Method used

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  • Steel for support and hanger of third-generation pressurized water reactor nuclear power plant and manufacturing method thereof
  • Steel for support and hanger of third-generation pressurized water reactor nuclear power plant and manufacturing method thereof
  • Steel for support and hanger of third-generation pressurized water reactor nuclear power plant and manufacturing method thereof

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Embodiment Construction

[0037] The following examples are used to specifically illustrate the contents of the present invention, and these examples are only general descriptions of the contents of the present invention, and do not limit the contents of the present invention.

[0038] Table 1 is the smelting chemical composition of the steel of the example; Table 2 is the steelmaking and continuous casting data; Table 3 is the rolling and heat treatment process of the steel of the example; Table 4 is the mechanical properties of the steel plate of the example.

[0039] The production method of steel in this embodiment is to use low-P and low-S molten iron as raw material. The molten steel is smelted in a converter, refined outside the LF+VD furnace, and cast into continuous casting slabs. The heat treatment process is a temperature of 605±10°C, a holding time of 10h, and a heating and cooling rate of ≤55°C / h above 425°C.

[0040] Table 1 embodiment steel smelting chemical composition (%)

[0041] ...

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Abstract

The invention discloses steel for third generation pressurized water reactor nuclear power station supports and hangers, and a manufacturing method thereof. The steel contains 0.10-0.17% of C, 0.25-0.35% of Si, 0.45-0.90% of Mn, P which is less than or equal to 0.015%, S which is less than or equal to 0.003%, 0.20-0.45% of Ni, 0.90-1.10% of Cr, 0.30-0.50% of Mo, 0.01-0.03% of Ti, 0.01-0.03% of V,0.1-0.3% of Cu, and 0.001-0.005% of B, with the balance being Fe and inevitable impurities; vacuum degassing can be performed at 1,580-1,610 DEG C, the degree of superheat is greater than or equal to50 DEG C, and the casting speed is greater than 1.5 m/min; the heating temperature of a casting blank is 1,100-1,150 DEG C, an initial rolling temperature is greater than or equal to 1,000 DEG C, anda finish rolling temperature is 880-920 DEG C; the quenching temperature is 890-920 DEG C, and the heat preservation time is 2.5-4.5 min/mm; and the tempering temperature is 620-650 DEG C, and the heat preservation time is 2-4 min/mm. The steel is used for third generation pressurized water reactor nuclear power station supports and hangers, and has low-temperature toughness and excellent intensity.

Description

technical field [0001] The invention belongs to the field of steel manufacturing for nuclear power equipment, and in particular relates to a steel for support and hanger of a third-generation pressurized water reactor nuclear power plant and a manufacturing method thereof. Background technique [0002] The nuclear-grade support and hanger is an important part of the nuclear power plant. The design of the nuclear power plant has high safety requirements. The design, manufacture and installation of the support and hanger must consider the damage caused by the earthquake load. Therefore, whether the design, manufacture, and installation of nuclear-grade pipeline supports and hangers is reasonable, it directly affects the operation reliability of nuclear power plants, and affects the construction period and investment of nuclear power plants. [0003] In foreign countries, due to the rapid development of nuclear power plants, the specifications, types and scope of application of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/50C22C38/46C22C38/42C22C38/54C21D1/25C21D8/02C21C7/10
CPCC21C7/10C21D1/25C21D8/0226C22C38/02C22C38/04C22C38/42C22C38/44C22C38/46C22C38/50C22C38/54
Inventor 颜秉宇王爽胡海洋王永才孙殿东刘徐源梁福鸿王勇隋松言石锋涛
Owner ANGANG STEEL CO LTD
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