A hot isostatic pressing connection method of tungsten and heat sink material

A heat sink material, hot isostatic pressing technology, applied in welding equipment, greenhouse gas reduction, manufacturing tools, etc., can solve the problems of reducing connection strength, interface structure changes, etc., and achieve joint connection performance improvement, structure strength and structural performance. Guarantee, the effect of shortening the process cycle

Active Publication Date: 2022-05-20
SOUTHWESTERN INST OF PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Tungsten / low-activation steel or tungsten / CuCrZr alloy uses pure iron as the intermediate layer. After successful hot isostatic pressing, subsequent solution treatment and tempering or aging treatment are usually required to restore the structure and properties of the steel or copper alloy. , but the subsequent heat treatment may also lead to changes in the structure of the tungsten / iron interface and reduce the connection strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1. The welding surfaces of the tungsten block, the low-activation steel block and the pure iron intermediate layer are sanded and polished and ultrasonically cleaned. The cleaning agent of described ultrasonic cleaning is acetone and alcohol, and the time is 30min.

[0042] 2. Clean the stainless steel sheath with degreaser and rust remover.

[0043] 3. The cleaned tungsten block, low-activation steel block, pure iron intermediate layer, and stainless steel sheath are all degassed by vacuum baking. The baking temperature is 300°C, the time is 3h, and the vacuum degree is better than 1×10 -3 Pa.

[0044] 4. Wrap the hot isostatic pressing bag at better than 1×10 -4 Carry out exhaust treatment for 12 hours under the vacuum degree of Pa, and then carry out clamping and sealing welding.

[0045] 5. Put the sealing body of the joint sheath into a hot isostatic pressing furnace, raise the temperature to 980°C, raise the pressure to 150Mpa, and keep the temperature and pres...

Embodiment 2

[0051] 1. The welding surface of the tungsten block, the CuCrZr alloy block and the pure iron intermediate layer is sanded and polished and ultrasonically cleaned. The cleaning agent of described ultrasonic cleaning is acetone and alcohol, and the time is 30min.

[0052] 2. Clean the stainless steel sheath with degreaser and rust remover.

[0053] 3. The cleaned tungsten block, CuCrZr alloy block, pure iron intermediate layer, and stainless steel sheath are all degassed by vacuum baking. The baking temperature is 300°C, the time is 3h, and the vacuum degree is better than 1×10 -3 Pa.

[0054] 4. Wrap the hot isostatic pressing bag at better than 1×10 -4 Carry out exhaust treatment for 12 hours under the vacuum degree of Pa, and then carry out clamping and sealing welding.

[0055] 5. Put the sheathed sealing body into a hot isostatic pressing furnace, raise the temperature to 940°C, raise the pressure to 150Mpa, and hold the heat for 70 minutes.

[0056] 6. After heat pres...

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PUM

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Abstract

The invention belongs to the connection technology of dissimilar materials, in particular to a hot isostatic pressure connection method of tungsten and heat sink materials. Pretreat the welding surface of the tungsten block, heat sink material and pure iron interlayer, clean the stainless steel sheath, degas the tungsten block, heat sink material and pure iron interlayer by vacuum baking, and carry out the hot isostatic pressure sheath After the exhaust gas treatment, carry out clamping and sealing welding. The sealing body of the joint sheath is placed in a hot isostatic pressing furnace. After the heat preservation and pressure holding are completed, it is cooled to room temperature. The joint encases the sealing body to obtain the joint. The method significantly reduces the process steps and cycle of making the joint, and at the same time avoids the generation of more brittle phases at the interface.

Description

technical field [0001] The invention belongs to the connection technology of dissimilar materials, in particular to a method for connecting tungsten and heat sink materials. Background technique [0002] The design and fabrication of plasma-oriented components is a key technology in the manufacture of thermonuclear fusion reactors. Tungsten and its alloys have high melting point, high thermal conductivity, low vapor pressure, and low sputter corrosion rate, and are regarded as the most likely plasma-facing materials for full use in future tokamak fusion reactors. [0003] Tungsten needs to be connected with a heat sink material with high thermal conductivity to achieve the purpose of cooling, and copper alloy and low-activation steel are ideal candidates for heat sink materials. Among them, low-activation steel is used as the heat sink material of the first wall, and its thermal conductivity is better. Good copper is used as the heat sink material of the divertor, so the co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/00B23K20/02B23K20/26
CPCB23K20/002B23K20/021B23K20/023B23K20/26Y02E30/10
Inventor 黄攀谌继明王平怀周毅陈艳宇韦郑兴李前
Owner SOUTHWESTERN INST OF PHYSICS
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