Steel for high strength and high toughness nuclear power voltage stabilizer and manufacturing method of steel

Abstract

The invention provides steel for a high strength and high toughness nuclear power voltage stabilizer and a manufacturing method of the steel. Components of a steel plate comprise, by weight percentage, 0.13%-0.22% of C, 0.15%-0.35% of Si, 1.30%-1.65% of Mn, smaller than or equal to 0.010% of P, smaller than or equal to 0.003% of S, 0.40-0.55% of Mo, 0.60%-0.80% of Ni, 0.10%-0.25% of Cr, 0.01%-0.03% of V, smaller than or equal to 0.04% of Alt and the balance Fe and inevitable impurities. The manufacturing method comprises molten iron pretreatment, electric furnace smelting, LF refining, VD vacuum treatment, electric furnace die casting, rolling and heat treatment. Few amount of microalloying elements are added in the steel, the steel is simple in production process, stability is achieved, operability is high, and the design requirement of the steel for the nuclear power station voltage stabilizer can be completely met.

Description

technical field [0001] The invention belongs to the field of ferrous metal materials, and in particular relates to a high-strength and high-toughness nuclear power voltage stabilizer steel and a manufacturing method thereof. Background technique [0002] For a long time, China's energy structure has been dominated by coal, which has caused serious environmental problems. At the same time, it has been difficult to meet the needs of rapid economic development and vigorously develop efficient and clean energy—nuclear power is my country's current stage to solve energy shortages and improve energy. Strategic choice of structure. Nuclear power is an important part of the power industry. Actively promoting the construction of nuclear power is essential to meet the growing energy demand of economic and social development, ensure energy supply and safety, protect the environment, realize the optimization and sustainable development of the power industry structure, and enhance my coun...

AI Technical Summary

Problems solved by technology

Its shortcoming is that, because the chemical composition design of the invention does not add Ni and Mo elements, and adopts the controlled rolling and controlled cooling process to produce, it can be seen from the embodiments of the invention that the strength of the applicable steel plate is low, and the upper limit of the thickness is 16mm

Its shortcoming is that the invention adopts the mode of normalizing heat treatment or controlled rolling to produce, and the element content such as C, Ni, Mo is all on the low side in the composition design, causes the steel plate strength to be low, and after the simulated post-weld heat treatment of the steel plate The performance is not concerned

Its disadvantages are that the above-mentioned invention adopts steel ingot forging and rolling process, which increases the production cost, and the yield is low, the production cycle is long, and there is no clear steel plate thickness specification in the embodiment

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