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Stainless steel wrap wire for sodium cooled fast reactor core assembly and method for preparing same

A technology of stainless steel and wire winding, applied in the field of alloys, can solve the problem of inability to meet the radial positioning and winding of fast reactor element rods, and achieve excellent wire surface quality, ensure dimensional tolerance, and ensure the effect of dissolution.

Inactive Publication Date: 2008-12-31
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a new stainless steel wire and its preparation method in view of the fact that the existing stainless steel wire cannot meet the needs of radial positioning wire for fast reactor element rods

Method used

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  • Stainless steel wrap wire for sodium cooled fast reactor core assembly and method for preparing same

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Effect test

Embodiment 1

[0037] Use the technical scheme provided by the present invention to prepare the φ0.6mm winding wire used for positioning the element rod in the stainless steel reflector assembly of the sodium-cooled fast reactor, with a weight of 2kg.

[0038] Concrete preparation steps are as follows:

[0039] (1) According to the following composition and weight ratio, and use vacuum induction melting furnace and consumable electrode vacuum electric arc furnace to smelt molten steel respectively: 0.04% to 0.08% of C; ≤0.75% of Si; ≤0.02% of P ;≤0.02% S; 1.5%~2.0% Mn; 11.0%~14.0% Ni; 16.0%~18.0% Cr; 2.0%~3.0% Mo; 0.3%~0.5% Ti;≤0.1% ≤0.002% of B; ≤0.035% of N; the rest is Fe. During the smelting process, pure metals are used for ingredients, and the addition of rare earth elements is prohibited. After smelting, use a rod and wire rod rolling machine to open the billet to make a stainless steel plate billet.

[0040] (2) Thermal processing. At each stage of cold working, the selected heat...

Embodiment 2

[0047] Proportioning is with embodiment 1. The difference is that during smelting, the first time is smelting in argon-oxygen furnace, and the second time is electroslag remelting.

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Abstract

The invention discloses a stainless steel wrap wire of a sodium-cooled fast reactor core subassembly as well as a method for the production thereof. The stainless steel wrap wire has components, in weight proportion: 0.04 percent to 0.08 percent of C; less than or equal to 0.75 percent of Si; less than or equal to 0.02 percent of P; less than or equal to 0.02 percent of S; 1.5 percent to 2.0 percent of Mn; 11.0 percent to 14.0 percent of Ni; 16.0 percent to 18.0 percent of Cr; 2.0 percent to 3.0 percent of Mo; 0.3 percent to 0.5 percent of Ti; less than or equal to 0.1 percent of Co; less than or equal to 0.002 percent of B; less than or equal to 0.035 percent of N; balance Fe. The double-smelting is adopted when in smelting; the hydrogen protection or vacuum bright annealing treatment is adopted when in annealing; a single crystal silicon dioxide mold with rather high precision is adopted in the drawing process; and the degree of cold working of final delivery state is between 17 and 20 percent. The wrap wire prepared by the proposal can meet the requirements of the sodium-cooled fast reactor core subassembly.

Description

technical field [0001] The invention belongs to the field of alloy technology, and in particular relates to a stainless steel winding wire of a sodium-cooled fast reactor core assembly and a preparation method thereof. Background technique [0002] The stainless steel winding wire used for the radial positioning of sodium-cooled fast reactor element rods works in a high-temperature sodium medium environment of 350 ° C to 550 ° C, and the fast neutron radiation dose is high. Its material and final delivery status must be consistent with The cladding tubes of the element rods are consistent to ensure the structural integrity and radial positioning of the rod bundles in the operating state of the reactor. The chemical composition, dimensional tolerances and surface quality requirements of this material are extremely strict. Although advanced countries developing fast reactor technology abroad have produced it, they have not disclosed the specific preparation method. [0003] ...

Claims

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Application Information

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IPC IPC(8): C22C38/58
Inventor 张汝娴王晓荣谢光善黄晨钱顺发
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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