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Alloy moving conduit for sodium-cooled fast reactor control rod drive mechanism and manufacturing method

A technology of driving mechanism and sodium-cooled fast reactor, which is applied in the field of iron-nickel-chromium alloy seamless pipe, can solve the problems of high alloying degree of GH1059 alloy, difficult smelting and manufacturing technology, and large deformation resistance, so as to improve the anti-radiation swelling Performance, elimination of segregation of elements, and effect of reducing stress concentration

Active Publication Date: 2021-10-29
JIANGSU YINHUAN PRECISION STEEL TUBE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] GH1059 alloy has a high degree of alloying and high deformation resistance, and its smelting and manufacturing technology is difficult

Method used

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  • Alloy moving conduit for sodium-cooled fast reactor control rod drive mechanism and manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A soda-cooled fast heap control rod drive mechanism provided by this embodiment with a alloy movement tube, and its chemical composition and mass of: C: 0.063%, Si: 0.10%, Mn: 1.51%, P: 0.005%, s: 0.005%, Cr: 16.44%, Ni: 36.30%, Cu: 0.03%, MO: 3.40%, W: 0.063%, Al: 0.08%, N: 0.018%, CO: 0.005%, B: 0.0017%, ZR: 0.010%, Y: Y: 0.001%, SN: 0.0002%, AS: 0.0007%, PB: 0.0001%, BI: 0.0001%, margin is Fe and trace elements.

[0055] The manufacturing method includes the following steps:

[0056] (1) Smelting

[0057] The alloy material was subjected to a vacuum induction smelting, the smelting temperature was 1480 ° C, cast into a 1,440 mm alloy ingot, and then using a 6-ton protective atmosphere of the electric slag heavy furnace to smelt into alloy ingots of ф 620 / ф720 mm;

[0058] (2) Forging

[0059] The alloy ingot obtained by step (1) is used in a 2000-ton fast forging unit, and the starting temperature is 1100 ~ 1150 ° C, the final forging temperature is 900 ~ 950 ° C, and ...

Embodiment 2

[0084] In this embodiment, a sodium cold fast heap control rod drive mechanism is used for alloy movement tubes, and the difference from Example 1 is that the chemical composition and mass of mass, such as: C: 0.060%, Si: 0.1%, Mn: 1.53% P: 0.005%, S: 0.005%, Cr: 36.40%, Ni: 36.30%, Cu: 0.02%, MO: 3.25%, W: 0.07%, Al: 0.073%, N: 0.02%, CO: 0.005% B: 0.0019%, Zr: 0.010%, Y: 0.001%, SN: 0.0002%, AS: 0.0008%, PB: 0.0001%, BI: 0.0001%, Sb: 0.001%, margin is Fe and trace elements.

[0085] In the product, the outer surface roughness Ra is ≤1.6 μm; the outer diameter is ± 1.00mm, the inner diameter is ± 1.00mm; 20 ° C Tensile properties: R m = 590MPa, R p0.2 = 264MPa, A 50 = 49.0%, z = 75%, R m Indicates tensile strength, R p0.2 Indicates the yield strength, and A means a broken elongation, Z represents a section shrinkage rate; high temperature tensile performance: 100 ° C, R m = 553MPa, R p0.2 = 233MPa, A 50 = 44.5%, z = 76%, 200 ° C, R m = 525MPa, R p0.2 = 201MPA, A 50 = 45.0%, z = 7...

Embodiment 3

[0087] In this embodiment, a sodium cold fast heap control rod drive mechanism is used with alloy movement tubes, and the difference from Example 1 is that the chemical composition and mass of: 0.060%, Si: 0.10%, Mn: 1.54 %, P: 0.005%, S: 0.001%, Cr: 36.27%, Ni: 36.18%, Cu: 0.03%, MO: 3.26%, W: 0.07%, Al: 0.048%, N: 0.012%, CO: 0.001 %, B: 0.001%, Zr: 0.0010%, Y: 0.001%, SN: 0.001%, AS: 0.0007%, Pb: 0.0001%, BI: 0.0001%, Sb: 0.001%, margin is Fe and trace elements.

[0088] In the product, the outer surface roughness Ra is ≤1.6 μm; the outer diameter is ± 1.00mm, the inner diameter is ± 1.00mm; 20 ° C Tensile properties: R m = 592MPa, R p0.2 = 266MPa, A 50 = 48.5%, z = 75%, R m Indicates tensile strength, R p0.2 Indicates the yield strength, and A means a broken elongation, Z represents a section shrinkage rate; high temperature tensile performance: 100 ° C, R m = 552MPa, R p0.2 = 231MPA, A 50 = 44.0%, z = 75%, 200 ° C, R m = 526MPa, R p0.2 = 203MPa, A 50 = 45.0%, z = 74%, 300 ° C...

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Abstract

The invention discloses an alloy moving conduit for a control rod driving mechanism of a sodium-cooled fast reactor and a manufacturing method thereof. 1.2%~1.8%, P≤0.015%, S≤0.010%, Si≤0.20%, Cr: 15.0%~17.0%, Ni: 35.0%~37.0%, Mo: 3.0%~3.5%, Cu≤0.05%, Y≤0.05%, B≤0.002%, Zr≤0.05%, Al≤0.1%, W≤0.2%, N≤0.03%, Co≤0.025%, As≤0.006%, Sb≤0.005%, Bi≤0.005%, Sn≤0.006%, Pb≤0.006%, As+Sb+Bi+Sn+Pb≤0.015%, the balance is Fe and trace elements. It has good microstructure and mechanical properties, corrosion resistance, dimensional accuracy and surface quality, and meets the requirements for the use of sodium-cooled fast reactors.

Description

Technical field [0001] The present invention relates to the technical field of iron nickel chromium-based alloy seamless tubes, and more particularly to the alloy driving catheter and manufacturing method for a sodium cold fast heap control rod drive mechanism. Background technique [0002] As a safe, clean, low-carbon and efficient energy, has been highly attached, especially since the Japanese Fukushima nuclear accident, and the safety of nuclear power has become the most important issue of nuclear power. At present, the world is gradually transitioning to the third-generation nuclear power technology in the construction of nuclear power plants, but the fourth-generation nuclear energy system has become a key research in the next few years. [0003] As early as June 1999, the US Department of Energy (DOE) nuclear energy, the science and technology office has raised the initiative of the fourth-generation nuclear power plant (hereinafter referred to as the fourth-generation nucl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/58C22C38/44C22C38/42C22C38/50C22C38/54C22C38/46C22C38/52C22C38/06C21D8/10G21C7/12
CPCC21D8/105C22C38/001C22C38/005C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/50C22C38/52C22C38/54C22C38/58G21C7/12Y02E30/30
Inventor 高佩王锋朱海涛
Owner JIANGSU YINHUAN PRECISION STEEL TUBE CO LTD
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