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Bimetal composite plate for high-temperature molten salt environment

A high-temperature molten salt and composite plate technology, applied in the field of metal composite materials, can solve problems such as reducing system economy, achieve the effects of improving molten salt energy storage efficiency and power generation efficiency, significant technical and economic value, and increasing operating temperature

Active Publication Date: 2019-12-10
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (2) If expensive nickel alloys such as Hastelloy N or Inconel 617 are used, the economy of the entire system will be greatly reduced

Method used

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  • Bimetal composite plate for high-temperature molten salt environment
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  • Bimetal composite plate for high-temperature molten salt environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Choose 304H stainless steel with a thickness of 30mm and a carbon content in the range of 0.04 to 1.00% as the base material, and 10mm thick UNS N02201 pure nickel as the cladding material. The surface is treated by overall grinding and polishing, and the surface roughness is treated to 6.3 within μm.

[0045] After the surface treatment is completed, the base-layer-layer-solder stop flux-multi-layer-base layer is used to seal and weld the blanks: stack two pure nickel plates together, apply solder stop flux in the middle, and then put two stainless steel plates together. The board is placed on the outside of two pure nickel boards to form a four-layer composite board structure, align the pre-opened grooves, perform edge sealing welding, and weld a gas inlet and outlet pipe at the last position of the sealing welding, and perform vacuum treatment, vacuumize The vacuum degree is required to be no more than 10 -3 Pa.

[0046] Before hot rolling, heat the plate to 800°C ...

Embodiment 2

[0055] Choose 316H stainless steel with a thickness of 60mm and a carbon content in the range of 0.04-1.00% as the base material and 20mm thick N5 pure nickel as the cladding material, and use the overall grinding and polishing method to treat the surface roughness to within 6.3μm.

[0056] After the surface treatment is completed, the base-layer-layer-solder stop flux-multi-layer-base layer is used to seal and weld the blanks: stack two pure nickel plates together, apply solder stop flux in the middle, and then put two stainless steel plates together. The board is placed on the outside of two pure nickel boards to form a four-layer composite board structure, align the pre-opened grooves, perform edge sealing welding, and weld a gas inlet and outlet pipe at the last position of the sealing welding, and perform vacuum treatment, vacuumize The vacuum degree is required to be no more than 10 -3 Pa.

[0057] Before hot rolling, heat the plate to 850°C at a heating rate of 35°C / h,...

Embodiment 3

[0065] 347H stainless steel with a carbon content in the range of 0.04-1.00% with a thickness of 60 mm and pure nickel grade N6 with a thickness of 15 mm were selected as raw materials, and the surface roughness was treated to within 6.3 μm by overall grinding and polishing.

[0066] After the surface treatment is completed, the base-layer-layer-solder stop flux-multi-layer-base layer is used to seal and weld the blanks: stack two pure nickel plates together, apply solder stop flux in the middle, and then put two stainless steel plates together. The board is placed on the outside of two pure nickel boards to form a four-layer composite board structure, align the pre-opened grooves, perform edge sealing welding, and weld a gas inlet and outlet pipe at the last position of the sealing welding, and perform vacuum treatment, vacuumize The vacuum degree is required to be no more than 10 -3 Pa.

[0067] Before hot rolling, heat up to 900°C at a heating rate of 30°C / h, then keep it ...

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Abstract

The invention discloses a bimetal composite plate for a high-temperature molten salt environment. The bimetal composite plate is formed by compounding a corrosion resistant plate as a base layer and apure nickel plate as a composite layer, the carbon content of the corrosion resistant plate ranges from 0.04% to 1.00%, and the nickel content of the pure nickel plate is greater than 99.0%. Comparedwith the prior art, according to the bimetal composite plate, an extremely economic solution is provided for a metal-structured material under the high-temperature molten salt environment. Compared with adoption of a pure Hastelloy N and Inconel 617 alloy, the cost can be lowered by 75%; meanwhile, according to the bimetal composite plate, under the premise of maintaining the high-temperature structure strength, high-temperature molten salt corrosion resistance and other parameters to meet the safety requirements, and the service temperature of high-temperature molten salt environment equipment can be greatly increased from existing 500-600 DEG C to 800 DEG C or above. According to implementation of the technical scheme of the bimetal composite plate, the energy storage efficiency and power generation efficiency of molten salt are expected to be greatly improved, and great technical and economic value is achieved.

Description

technical field [0001] The invention relates to metal composite materials, in particular to a bimetal composite plate for high-temperature molten salt environment. Background technique [0002] Molten salt is a heat transfer and heat storage medium with low cost, long life, good heat transfer and heat storage performance at high temperature, high heat flux and low operating pressure. The use of molten salt as the heat transfer and heat storage medium of nuclear reactors, energy storage technology, and solar thermal power generation can significantly improve the thermal efficiency, reliability and economy of power generation and energy storage systems. [0003] The fourth-generation nuclear reactor-molten salt reactor has become an important development direction in the field of nuclear power in the future because of its high safety and high efficiency. The operating temperature of the reactor is 600°C to 700°C, and highly corrosive molten salt is used as the coolant. Theref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/00B32B15/04B32B15/18B32B15/01
CPCB32B15/00B32B15/015B32B15/043B32B15/18
Inventor 梁建平李志军李肖科袁晓丹
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI