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Ultra-high pressure brazed connection method for connecting wolfram-diamond/copper-low activation steel

An ultra-high pressure, low activation steel technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problem of low direct welding strength, and achieve the effect of avoiding direct contact, reducing carburization, and reducing impact

Inactive Publication Date: 2013-05-08
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The direct welding strength between diamond / copper composite material and tungsten or low-activation steel is low, adding CuCrZr or oxygen-free copper (OFC) foil can improve its welding strength, so it involves using tungsten-CuCrZr or oxygen-free copper (OFC) foil - Diamond / copper composites - CuCrZr or oxygen-free copper (OFC) foils - Welding of low activation steel into water-cooled tungsten modules

Method used

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  • Ultra-high pressure brazed connection method for connecting wolfram-diamond/copper-low activation steel
  • Ultra-high pressure brazed connection method for connecting wolfram-diamond/copper-low activation steel
  • Ultra-high pressure brazed connection method for connecting wolfram-diamond/copper-low activation steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Firstly, a diamond / copper composite material with a volume fraction of diamond particles of 50% was selected as the intermediate layer for welding between the two base materials tungsten and low-activation steel. Calculate the raw material ratio of diamond and copper in the diamond / copper composite material with a volume ratio of 50% according to the designed mold size. Then the prepared diamond and copper powder are wet-mixed with alcohol in a V-shaped mixer and a mortar to make the diamond / copper powder evenly mixed for later use.

[0026] The tungsten laminations are four tungsten strips with dimensions of 24×10×6mm. Low activation steel size 24×24×17mm. CuCrZr foil size 24×24×0.3mm. Grind, clean and dry the surface of the sample before connecting.

[0027] Put the graphite mold into the graphite mold in the order of low activation steel-CuCrZr foil-diamond / copper mixture-CuCrZr foil-tungsten lamination from top to bottom, and then put the graphite mold into the s...

Embodiment 2

[0030] First, a diamond / copper composite material with a volume fraction of diamond particles of 40% was selected as the intermediate layer for welding between the two base materials tungsten and low-activation steel. Calculate the raw material ratio of diamond and copper in the diamond / copper composite material with a volume ratio of 40% according to the designed mold size. Then the prepared diamond and copper powder are wet-mixed with alcohol in a V-shaped mixer and a mortar to make the diamond / copper raw materials evenly mixed for later use.

[0031] The tungsten laminations are four tungsten strips with dimensions of 24×10×6mm. Low activation steel size 24×24×17mm. CuCrZr foil size 24×24×0.3mm. Grind, clean and dry the surface of the sample before connecting.

[0032] Put the graphite mold into the graphite mold in the order of low activation steel-CuCrZr foil-diamond / copper mixture-CuCrZr foil-tungsten lamination from top to bottom, and then put the graphite mold into ...

Embodiment 3

[0036] First, a diamond / copper composite material with a volume fraction of diamond particles of 45% was selected as the intermediate layer for welding between the two base materials tungsten and low-activation steel. Calculate the raw material ratio of diamond and copper in the diamond / copper composite material with a volume ratio of 45% according to the designed mold size. Then the prepared diamond and copper powder are wet-mixed with alcohol in a V-shaped mixer and a mortar to make the diamond / copper raw materials evenly mixed for later use.

[0037]The tungsten laminations are four tungsten strips with dimensions of 24×10×6mm. Low activation steel size 24×24×17mm. CuCrZr foil size 24×24×0.3mm. Grind, clean and dry the surface of the sample before connecting.

[0038] Put the graphite mold into the graphite mold in the order of low activation steel-OFC foil-diamond / copper mixture-OFC foil-tungsten lamination from top to bottom, and then put the graphite mold into the ste...

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Abstract

Provided is an ultra-high pressure brazed connection method for connecting wolfram-diamond / copper-low activation steel. The method relates to the preparation of a water cooling wolfram module of a divertor of a fusion reactor device. The method comprises using the diamond / copper composite materials of different diamond volume ratios as the intermediate layers between the wolfram and the low activation steel, and a layer of CuCrZr or oxygen-free copper (OFC) foil with the thickness of 0.3 mm is added between the diamond / copper composite materials and the wolfram and between the diamond / copper composite materials and the low activation steel, then a cladding type structure is adopted to put the raw materials in a graphite die in sequence, the raw materials are placed into a six-surface diamond presser under the packaging of a steel cup, a magnesium cup, graphite paper and a pyrophyllite wrap sleeve to carry out ultra-high pressure electrifying welding, and wolfram stack-diamond / copper-low activation steel is ultimately formed into an integrate wolfram module at one time. The ultra-high pressure brazed connection method for connecting wolfram-diamond / copper-low activation steel can achieve the welding of the wolfram stack-diamond / copper-low activation steel at one time in a short time, a welding interface is intact, welding strength is high, and the heat-conducting property of the wolfram module is good.

Description

technical field [0001] The invention relates to the preparation of a divertor water-cooled tungsten module in a fusion reactor device, in particular to a welding method between plasma-facing material tungsten, heat sink material and low-activation steel. Specifically, a diamond / copper composite material is used as an intermediate layer and a heat sink material between tungsten and low-activation steel, and welding is carried out by means of ultra-high pressure energization. Background technique [0002] When the tokamak device is running, the fusion reaction of deuterium and tritium will produce high-energy neutrons of 14.1MeV, which will strongly physically and chemically scour the surface of the plasma-facing material, especially the divertor components must withstand 10- 20 MW / m 2 Heat flux. This environment of high-energy neutron irradiation and high heat load requires the use of materials with high temperature resistance and low activity for the divertor. Tungsten has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/19B23K1/20
Inventor 沈卫平李鹏王占朋张庆玲周雏蕾赵晓琳刘文娜徐士亮
Owner UNIV OF SCI & TECH BEIJING
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