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First wall part or low activation steel heat sink material coated with thick tungsten coating and making method thereof

A low-activation steel and heat sink material technology, applied in coating, metal material coating process, thermonuclear fusion reactor and other directions, can solve the problem of short life, achieve excellent performance and inhibit the growth of tungsten grains

Inactive Publication Date: 2006-04-05
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

Low-Z materials are too short-lived for the first wall of future fusion reactors

Method used

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Embodiment Construction

[0016] Below in conjunction with accompanying drawing, the patent of the present invention is described in further detail.

[0017] Referring to Figure 1, first process low-activation martensitic / ferritic steel into a water jacket as shown in the figure. The size of the water jacket is 100×50×15, and the thickness of the water jacket on the sprayed surface is 5 mm. The thickness of the other sides is 4 mm, and the two sides are respectively welded to connect the water pipes. After passing the pressure leak test, the sprayed surface is sandblasted and installed on the vacuum plasma spraying equipment. The water pipes at both ends are connected to the cooling water. After vacuuming, the sprayed surface is cleaned by transfer arc. Active water cooling keeps the substrate temperature below 500°C. In the spraying process, 70% stainless steel powder and 30% tungsten powder are used as the middle adaptation layer, and the thickness of the adaptation layer is about 0.5mm; the center ...

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Abstract

The invention discloses first wall part with thick wolfram coating or low-activation steel thermal deposition material and opposite manufacture method. Wherein, selecting base plate as low-activation martensitic / ferritic steel to clear with transferred arc; using 70% stainless steel powder and 30% wolfram powder as interlayer of 0.5mm; spraying plasma arc has center temperature as 15000K speed as 500m / s, average particle size of wolfram powder is 10~15 microns, the coating has thickness as 2mm, density as 78~88% of body material and oxygen content is 0.06~0.15%; during whole spraying process, using active water cooling to control base plate temperature under 500Deg. As low-activation steel both as structure support material and thermal deposition material, this invention solves large area linkage key-problem and can bear stably long-time action of 1MW / m2 thermal load given active cooling condition.

Description

technical field [0001] The invention relates to a first wall part of a nuclear fusion device, in particular to vacuum plasma spraying a thick tungsten coating on low-activation martensite / ferrite steel and a method thereof. Background technique [0002] With the upcoming construction of the International Thermonuclear Experimental Reactor ITER, research on plasma-facing materials (PFM) suitable for ITER and future fusion reactor requirements is a hot, difficult and frontier research topic in fusion research, and is directly related to future fusion reactors. The question of whether it can be realized. [0003] After years of research, currently recognized and alternative plasma-facing materials mainly include high Z (atomic number) tungsten and low Z (C, Be). Among them, low-Z materials have improved plasma performance and represent the energy triple product of fusion research progress (n e T e ×τ E ) played a very important role in the improvement. So far, carbon-based...

Claims

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Application Information

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IPC IPC(8): G21B1/13C23C14/00
CPCY02E30/128Y02E30/10
Inventor 陈俊凌李建刚
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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