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Tungsten-transition layer/stainless steel hot isostatic pressing diffusion bonding method

A technology of hot isostatic pressing diffusion and connection method, which is applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve problems such as large thermal stress and microscopic defects, and achieve positive engineering use value, easy operation, and joint performance excellent effect

Active Publication Date: 2019-03-01
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem solved by the present invention is: to provide a hot isostatic pressure diffusion connection method of tungsten / transition layer / stainless steel, which solves the connection between tungsten and steel used in the prior art to face the plasma divertor module of the first wall of the fusion reactor Parts are prone to large thermal stress and microscopic defects at the interface

Method used

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Effect test

Embodiment 1

[0036] The present embodiment provides the preparation method of the present invention, specifically:

[0037] φ25×20mm pure tungsten with a purity of 99.5wt%, φ25×0.25mm copper foil with a purity of 99.9wt%, and 316L steel with a purity of φ25×20 were respectively passed through 200 mesh, 400 mesh, 600 mesh, 1000 mesh, 2000 mesh sandpaper Grinding, then water polishing with (2-5) μm diamond particles to a mirror state, and then ultrasonic cleaning with alcohol and acetone for 30 minutes respectively.

[0038] Put the cleaned pure tungsten, copper foil, and 316L stainless steel into the 1Cr18Ni9Ti sheath in sequence, and cover the sheath and the sheath with the exhaust pipe in the H 2 The low-oxygen and low-humidity argon atmosphere glove box with O content and O content below 10ppm is welded by argon arc welding to form a package assembly, in which the exhaust pipe and cover cover are made of 1Cr18Ni9Ti material. After the welding is completed, leak detection is carried out ...

Embodiment 2

[0045] The present embodiment provides the preparation method of the present invention, specifically:

[0046] φ25×20mm pure tungsten with a purity of 99.5wt%, φ25×0.25mm nickel foil with a purity of 99.9wt%, and φ25×20 316L steel were passed through 200 mesh, 400 mesh, 600 mesh, 1000 mesh, 2000 mesh sandpaper respectively Grinding, then water polishing with (2-5) μm diamond particles to a mirror surface state, and then ultrasonic cleaning with alcohol and acetone for 15 minutes respectively.

[0047]Put the cleaned pure tungsten, nickel foil, and 316L stainless steel into the 316L stainless steel sheath in sequence, and cover the sheath and the sheath with the exhaust pipe in the H 2 The low-oxygen and low-humidity argon atmosphere glove box with O content and O content below 10ppm is welded by argon arc welding to form a package assembly, in which the exhaust pipe and cover cover are made of 316L stainless steel. After the welding is completed, leak detection is carried out...

Embodiment 3

[0054] The present embodiment provides the preparation method of the present invention, specifically:

[0055] The φ25×20mm pure tungsten with a purity of 99.5wt%, the φ25×0.25mm copper foil with a purity of 99.9wt%, the φ30×0.25mm nickel foil with a purity of 99.9wt%, and the φ25×20 316L steel were passed through 200 400 mesh, 600 mesh, 1000 mesh, and 2000 mesh sandpaper, and then water-polished with (2-5) μm diamond particles to a mirror state, and then ultrasonically cleaned with alcohol and acetone for 20 minutes respectively.

[0056] Put the cleaned pure tungsten, copper foil, nickel foil, and 316L stainless steel into the 304 stainless steel sheath in turn, and use electron beams in the high vacuum chamber to weld the sheath and the sheath cover with the exhaust pipe to form a sheath assembly. Vacuum degree better than 4×10 -3 Pa. Among them, the exhaust pipe and the cover cover are made of 304 stainless steel. After the welding is completed, leak detection is carrie...

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Abstract

The invention discloses a tungsten-transition layer / stainless steel hot isostatic pressing diffusion bonding method. Through the tungsten-transition layer / stainless steel hot isostatic pressing diffusion bonding method, the problems that tungsten-steel connecting parts for first-wall plasma divertors of fusion reactors are likely to form large thermal stress at interfaces and microdefects in the prior art are solved. According to the tungsten-transition layer / stainless steel hot isostatic pressing diffusion bonding method provided by the invention, pure tungsten, a transition layer and stainless steel serve as raw materials, are subjected to enveloping treatment and then are subjected to hot isostatic pressing treatment, stress relief annealing and envelop removing, and hot isostatic pressing diffusion connecting pieces can be obtained. The tungsten-transition layer / stainless steel hot isostatic pressing diffusion bonding method is simple in operation, non-defective metallurgical bonding can be realized, and the joint performance is excellent and stable.

Description

technical field [0001] The invention belongs to the technical field of interface connection preparation of metal materials, and in particular relates to a hot isostatic pressure diffusion connection method of tungsten / transition layer / stainless steel. Background technique [0002] Nuclear fusion energy is called "artificial solar energy" because of its high efficiency, cleanliness, safety and rich raw material resources. It is an important way to finally solve the energy and environmental problems of human society and promote the sustainable development of human society. one. The development of nuclear fusion energy has important strategic and economic significance for the sustainable development of our country. [0003] At present, one of the key issues restricting the research of nuclear fusion reactors is the preparation of divertors. As the core component of the nuclear fusion reactor, the divertor is located in the transition zone between high-temperature plasma and o...

Claims

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Application Information

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IPC IPC(8): B23K20/00B23K20/02B23K20/22
CPCB23K20/001B23K20/021B23K20/026B23K20/22
Inventor 谢东华张佳佳李强李启寿龙亮杨华蔡永军邓广平齐红
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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