Heat treatment method of thorium-based fused salt main container and core shroud

Abstract

The invention discloses a heat treatment method of a thorium-based fused salt main container and a core shroud. The method comprises the following steps of S1, heat treatment of the main container, specifically, the main container is of a vertical structure to be subjected to heat treatment, a bottom board is a carbon steel or low-alloy steel thick board and horizontally arranged on a furnace bodybearing point inside the furnace, and a placement plane of the main controller is provided; and S2, heat treatment of the core shroud, specifically, the core shroud is of a vertical structure to be subjected to heat treatment, the bottom board and a partition board are horizontally arranged on the furnace body bearing point inside the furnace, and a placement plane and an isolation effect of thecore shroud are provided. By the adoption of the heat treatment method of the thorium-based fused salt main container and the core shroud, the precision requirements for size changes in the heat treatment process of equipment can be effectively ensured, the heat treatment cost is reduced, the equipment which is subjected to heat treatment and is good in performance, stable in quality and high in precision is obtained, the manufacturing requirements of the thorium-based fused salt main container and the core shroud are met, and the service life of the equipment is prolonged.

Description

technical field [0001] The invention relates to the application field of molten salt projects in the nuclear power industry, in particular to a heat treatment method for a thorium-based molten salt main container and a core shroud. Background technique [0002] Nickel-based alloys are widely used in petrochemical, aerospace, marine engineering, nuclear power plants and other industries due to their excellent high-temperature mechanical properties and corrosion resistance. UNS N10003 material is one of the Hastelloy N series alloys, and is the main material used in the manufacture of core equipment main vessels and core shrouds in thorium-based molten salt (TMSR) nuclear energy systems. UNS N10003 belongs to Ni-Mo high-temperature nickel-based The alloy, whose nominal composition is 70Ni-16Mo-7Cr-5Fe, has good corrosion resistance to fluoride salts, high temperature mechanical properties and radiation resistance in a high temperature environment of 650-725 °C. [0003] Becau...

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Problems solved by technology

If iron-based materials are used for high-temperature anti-deformation restraint, on the one hand, the high-temperature strength of the material is low, which cannot play the role of tooling, and on the other hand, it will cause iron ion pollution to the equipment; if other nickel-based materials are used for high-temperature anti-deformation restraint, Due to the high price of the material, the cost of heat treatment will increase; if the N10003 material of the same material as the equipment is used for high-temperature anti-deformation constraints, the heat treatment can achieve the best effect, but due to the high price of the N10003 material and the long delivery cycle, It is bound to cause a great increase in manufacturing costs and unnecessary waste

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