Supporting steel for containment vessel of nuclear power station and manufacturing method thereof

Abstract

The invention provides supporting steel for a containment vessel of a nuclear power station and a manufacturing method thereof. The steel comprises the following components in percentage by weight: 0.10%-0.16% of C, 0.25%-0.45% of Si, 1.40%-1.65% of Mn, 0.45%-0.65% of Ni, 0.20%-0.50% of Cr, 0.20%-0.55% of Mo, 0.02%-0.04% of Alt, 0.05%-0.10% of Cu, 0.03-0.05% of V, 0.005-0.020% of Ti, 0.008% or less of P, 0.005% of less of S, 0.010% or less of N, and the balance being Fe and unavoidable impurities. The manufacturing method comprises smelting, continuous casting, heating, rolling and heat treatment. The thickness of a steel plate produced from the steel is 30-80 mm, the steel plate in the quenched and tempered state, simulated post-weld heat treatment state and 200 DEG C high temperature state completely meets the requirements of technical indicators, and meanwhile -40 DEG C impact absorption energy is still remained at a high level.

Description

technical field [0001] The invention belongs to the field of metals, and in particular relates to a support steel for a containment vessel of a nuclear power plant and a manufacturing method thereof. Background technique [0002] Due to the rapid development of my country's nuclear power industry in recent years, especially after experiencing the lessons of the Fukushima nuclear power plant accident, higher requirements have been put forward for the safety of nuclear power related equipment, and the safety and reliability of nuclear power plants are very important. The nuclear power plant containment is a sealed structure outside the nuclear reactor, and it is the landmark building of the nuclear power plant. All the equipment of the nuclear steam supply system are installed in it, as the last barrier against radiation, and it is also the equipment with the largest amount of steel in the nuclear power unit. Preventing or mitigating the release of radioactive substances into ...

AI Technical Summary

Problems solved by technology

This type of steel is designed with a low carbon equivalent composition, and the content of C, Si, Ni and other elements is low, which cannot guarantee the strength performance of the steel plate when the thickness reaches 100mm or more. Performance is not concerned

Images