Manufacturing process suitable for tungsten and steel connection of first wall part of fusion reactor

A manufacturing process and technology for wall components, applied in the field of metal diffusion welding, can solve the problems of poor connection performance and large differences in thermal expansion coefficients, and achieve the effects of high connection strength, good density and improved production efficiency

Inactive Publication Date: 2016-04-20
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The present invention is to solve the problem of poor connection performance due to the large difference in thermal expansion coefficient between tungsten and steel in the prior art, and provides a manufacturing process suitable for the connection of tungsten and steel for the first wall part of a fusion reactor

Method used

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  • Manufacturing process suitable for tungsten and steel connection of first wall part of fusion reactor
  • Manufacturing process suitable for tungsten and steel connection of first wall part of fusion reactor
  • Manufacturing process suitable for tungsten and steel connection of first wall part of fusion reactor

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Embodiment Construction

[0023] Taking the hot isostatic welding of the first wall of the water-cooled ceramic cladding tungsten and low-activation steel of the China Fusion Engineering Experimental Reactor as an example for further explanation.

[0024] Such as Figure 1-4 As shown, a manufacturing process suitable for the connection between tungsten and steel of the first wall part of the fusion reactor, the process steps are:

[0025] 1) Machining: Process tungsten workpiece 5, intermediate layer workpiece 4, and steel workpiece 3 according to the design requirements, wherein the size of tungsten workpiece 5 is 12mm×50mm×2mm (in order to avoid cracking of large-sized tungsten materials during welding, multiple pieces are selected for this workpiece Small-sized tungsten array welding), the steel workpiece 3 is made of RAFM steel, the base size is 60mm×50mm×25mm, the middle layer workpiece 4 is made of titanium, and the size is 12mm×50mm×0.5mm.

[0026] 2) Finish the surface to be welded of the abov...

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Abstract

The invention discloses a manufacturing process suitable for tungsten and steel connection of first wall part of a fusion reactor, belonging to the welding field of metal diffusion welding. The process comprises the following steps: 1, processing tungsten, steel and interlayer material workpieces according to requirements, and finishing a to-be-welded surface; 2, after processing, decontaminating and cleaning the workpieces by ultrasonic waves, and carrying out vacuum sealing; 3, manufacturing a stainless steel sheath; 4. putting the workpieces into the sheath in sequence, and sealing the sheath by electron beam welding or argon arc welding; 5, welding the sealed workpieces and sheath in a hot isostatic pressure machine, adopting high-purify argon gas by pressurizing gas, maintaining the temperature for 1.5-6h in the welding environment at 600-1080 DEG C and under the pressure of 100-300MPa, carrying out furnace cooling, and discharging from the furnace when the temperature is lower than 150 DEG C; and 6, carrying out necessary hot processing. According to the manufacturing process, the problem of poor connection performance of tungsten and steel caused by large difference of coefficients of thermal expansion can be solved, the connection strength and reliability of tungsten and steel can be improved.

Description

technical field [0001] The invention relates to a manufacturing process suitable for connecting tungsten and steel of the first wall part of a fusion reactor, and belongs to the field of metal diffusion welding. Background technique [0002] Tungsten has the characteristics of high melting point, low sputtering rate, and good physical and chemical resistance. It is considered to be one of the candidates for plasma-facing materials in future fusion reactors. The sinking material is processed from copper and its alloys. In order to adapt to the harsh conditions of high neutron environment in the future fusion reactor, the heat sink material must have low activation characteristics. The structure and heat sink material of the fusion reactor cladding and the next generation divertor are the first choice for low activation ferritic martensitic steel (RAFM steel) At present, the main difficulty in the connection between tungsten and RAFM steel is that the thermophysical propertie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K28/02B23K15/00B23K9/16B23K9/235
CPCB23K9/16B23K9/235B23K15/0033B23K15/0046B23K28/02B23K2103/18
Inventor 王纪超罗广南李强王万景
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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