Preparation method of tritium-permeation resistant seamless U-shaped pipeline for thermonuclear fusion experimental reactor

A technology of thermonuclear fusion and U-shaped tubes, which is applied in siphon tubes, tube components, mechanical equipment, etc., can solve the problems of poor anti-tritium penetration effect of coatings, affecting the structure and performance of matrix materials, and easy changes in aluminum content, etc. , achieve significant application value, realize automatic production, and achieve high production efficiency

Inactive Publication Date: 2010-06-30
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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AI Technical Summary

Problems solved by technology

When using this method to produce an aluminized layer, the aluminum content on the surface of the material is easy to change, which will affect the structure and properties of the base material
Using this method to prepare Al 2 o 3 When the anti-tritium penetration coating, tiny holes and cracks are also prone to occur inside the coating, and the anti-tritium penetration effect of the coating is not ideal
[0006] Comprehensive analysis of current Al 2 o 3 Tritium-blocking coating preparation technology can be found: Al 2 o 3 The tritium blocking effect of coatings is generally poor; in addition, it is difficult to prepare alumina ceramic coatings on the surface of seamless U-shaped pipelines for thermonuclear fusion experimental reactors with relatively complex shapes

Method used

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  • Preparation method of tritium-permeation resistant seamless U-shaped pipeline for thermonuclear fusion experimental reactor
  • Preparation method of tritium-permeation resistant seamless U-shaped pipeline for thermonuclear fusion experimental reactor

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Embodiment 1

[0022] The first step is to implement chemical milling pretreatment on the 316L stainless steel-Al bimetallic composite pipe to remove surface oxides and salts and other impurities during the preparation of the composite pipe; blank the bimetallic composite pipe pretreated by chemical milling , and then put it into the cold drawing die, and apply an axial force to the head of the tube blank to elongate it. Tube;

[0023] The second step is to put the rectangular cross-section mandrel and the rectangular cross-section flexible mandrel into the rectangular cross-section bimetallic composite straight pipe, so that the rectangular cross-section mandrel and the inner layer of the rectangular cross-section bimetallic composite straight pipe maintain a gap of 0.1 times the wall thickness, and perform winding forming , to prepare a U-shaped composite pipeline with a rectangular cross-section;

[0024] The third step is to suspend the U-shaped pipeline with a rectangular cross-section...

Embodiment 2

[0027] The first step is to perform chemical milling pretreatment on the RAFM steel / Al bimetallic composite pipe to remove surface oxides, salts and other impurities during the preparation of the composite pipe; to blank the bimetallic composite pipe pretreated by chemical milling, Then put it into the cold drawing die, apply an axial force to the head of the tube blank to elongate, and under the action of the mold, the tube material flows in the axial direction, circumferential direction and radial direction at the same time, thereby preparing a composite straight wall with a rectangular cross section. Tube;

[0028] The second step is to put the rectangular cross-section mandrel and the rectangular cross-section flexible mandrel into the rectangular cross-section bimetallic composite straight pipe, so that the rectangular cross-section mandrel and the inner layer of the rectangular cross-section bimetallic composite straight pipe maintain a gap of 0.1 times the wall thickness...

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Abstract

The invention discloses a preparation method of a tritium-permeation resistant seamless U-shaped pipeline for a thermonuclear fusion experimental reactor. In the method, chemical milling pretreatment is first carried out on a duplex metal composite pipe with an aluminum coating; integral cold forming process is carried out on a treated composite pipe blank; and the seamless U-shaped pipeline is prepared by making full use of the excellent property that coating metal and metallurgical base materials are combined and cannot be easily cracked and layered in the deforming process and by reasonably controlling shapes and sizes of a forming mould and other forming parts. The U-shaped pipeline is chemically milled and the thickness of an aluminum layer is controlled according to actual engineering needs. An anti-corrosion tritium-permeation resistant alumina coating is formed in site on the surface of the U-shaped pipeline by a plasma oxidation method. Finally, the seamless composite U-shaped pipeline with the anti-corrosion tritium-permeation resistant alumina ceramic coating is prepared.

Description

technical field [0001] The invention belongs to the technical field of composite pipeline preparation, and particularly relates to a method for preparing a seamless U-shaped composite pipeline with corrosion resistance and tritium penetration resistance for a thermonuclear fusion experimental reactor. Background technique [0002] Fusion energy is a "permanent" energy source and the ultimate solution to the energy crisis. The International Thermonuclear Experimental Reactor (ITER) is a test platform for verifying various key fusion-related technologies, and provides a key technology and data basis for the future construction of commercial demonstration reactors. Among them, the ITER Experimental Blanket Module (TBM) is one of the key experimental facilities to verify the tritium breeding, electromagnetic characteristics, thermal hydraulics and overall integration technology of the future fusion reactor cladding. With the development of the ITER international cooperation pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L43/00C23F1/00B21C37/15
Inventor 陶杰郭训忠
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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