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Composite coating for thermonuclear fusion reactor magnet support component and preparation method thereof

A thermonuclear fusion reactor, magnet support technology, applied in coating, metal material coating process, superimposed layer plating and other directions, can solve the problems of components reaching very high temperature, support structure failure, affecting operation safety, etc. Achieve uniform thickness, improve bonding strength and controllability

Inactive Publication Date: 2020-03-17
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal conductivity of the existing magnet supporting parts is poor, causing the parts to reach a very high temperature quickly, and even causing micro-zone melting to cause the parts to bite, which in turn causes the failure of the supporting structure and affects the safety of operation

Method used

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  • Composite coating for thermonuclear fusion reactor magnet support component and preparation method thereof
  • Composite coating for thermonuclear fusion reactor magnet support component and preparation method thereof
  • Composite coating for thermonuclear fusion reactor magnet support component and preparation method thereof

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preparation example Construction

[0054] In addition, the present invention also proposes a method for preparing the above-mentioned composite coating, which includes the following steps: spraying a transition layer and an insulating layer sequentially on the surface to be treated of the thermonuclear fusion reactor magnet support component, that is, spraying the transition layer first, and then spraying Insulation. Wherein, the thermonuclear fusion reactor magnet support components include gaskets, coating sleeves or top clamps.

[0055] Optionally, the raw material used for spraying the Ni5Al layer can be, but not limited to, Ni5Al powder with a particle size of 45-90 μm (such as 45 μm, 50 μm, 60 μm, 70 μm, 80 μm or 90 μm, etc.). It is worth noting that in this application, the Ni5Al powder should not be less than 45 μm, otherwise the coating roughness will be insufficient, and it should not exceed 90 μm, otherwise the powder will have a low degree of melting, poor bonding with the base material, and no tran...

Embodiment 1

[0076] This embodiment provides gasket 1 (such as figure 1 Shown) the preparation method of plasma spraying composite insulating coating on the surface of the component, mainly made through the following steps:

[0077] S1. Degrease and degrease the 316LN stainless steel gasket 1, use zirconium corundum to roughen the sprayed surface by sandblasting, the sand grain size is 46#, the sandblasting pressure is 0.45MPa, and the sandblasting distance is 200mm. Use compressed air to blow off possible residual sand particles or dust.

[0078] S2. Spray the gasket 1 coating by means of rotary spraying. When spraying the gasket 1 plane, the spray gun angle is 60°, the spray gun moves from the outer circular surface 11 to the inner circular surface 12, and the moving speed is 10-20mm / s; when spraying the inner circular surface 12, the spray gun angle is 30°, and the spray gun moves from the plane Move upwards downwards (that is, from the upper surface 13 of the washer 1 to the lower su...

Embodiment 2

[0083] Present embodiment provides coating cover 2 (as figure 2 Shown) the preparation method of plasma spraying composite insulating coating on the surface of the component, mainly made through the following steps:

[0084] S1. Degrease and degrease the A286 stainless steel coating sleeve 2, and use zirconium corundum to roughen the sprayed surface. The sand particle size is 46#, the sandblasting pressure is 0.45MPa, and the sandblasting distance is 200mm. Grit or dust.

[0085] S2. Spray the coating of the coating set 2 by means of rotary spraying. When spraying the coating cover 2 plane, the spray gun angle is 65°, and the spray gun moves from the outer circular surface 11 to the upward circular surface 21, and the moving speed is 15-25mm / s; when spraying the upper circular surface 21, the spray gun angle is -2°, and the spray gun Move from the top to the bottom of the plane at a speed of 35mm / s. The rotation speed of coating sleeve 2 is 220mm / s during spraying. The sp...

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Abstract

The invention provides a composite coating for a thermonuclear fusion reactor magnet support component and a preparation method, which belong to the technical field of material surface treatment. Thecomposite coating comprises a transition layer and an insulating layer which are sequentially arranged on the to-be-treated surface of the thermonuclear fusion reactor magnet support component; the transition layer comprises a Ni5Al layer; and the insulating layer comprises an Al2O3-3TiO2 insulating layer. The composite coating is well combined with a matrix, has excellent low-temperature thermalshock resistance and insulating property under high load, and meets the technical requirements of an international thermonuclear fusion experimental reactor on a magnet support component. The preparation method comprises the steps: the transition layer and the insulating layer are sequentially sprayed on the to-be-treated surface of a to-be-treated thermonuclear fusion reactor magnet support component, wherein the thermonuclear fusion reactor magnet support component comprises at least one of a gasket, a coating sleeve and a top chuck. The method is simple, easy to operate and beneficial to preparation of the composite coating which is uniform in structure and good in performance.

Description

technical field [0001] The invention relates to the technical field of material surface treatment, in particular to a composite coating used for thermonuclear fusion reactor magnet support components and a preparation method thereof. Background technique [0002] The International Thermonuclear Experimental Reactor (ITER) program is a large-scale international scientific cooperation program, which has entered the substantive construction stage. In this cooperation plan, the ITER magnet support task is one of the ITER procurement package tasks undertaken by China. All the net weight (about 100MN) of the ITER magnet system is finally borne by the gravity supports (GS) of the longitudinal field magnet. In addition to bearing the net weight, the magnet support must also be able to withstand the strong thermal stress generated when the superconducting coil is cooled by 31mm in radial direction, the strong electromagnetic force during normal discharge operation, and the abnormal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/11C23C4/073C23C4/08C23C4/134C23C4/02
CPCC23C4/02C23C4/08C23C28/30C23C4/073C23C4/11C23C4/134
Inventor 牛少鹏杨焜邓春明陈龙飞曾威陈志坤张吉阜邓子谦
Owner GUANGDONG INST OF NEW MATERIALS
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