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Tungsten and heat sink material hot isostatic pressing connecting method

A technology of heat sink material and hot isostatic pressing, which is applied in welding equipment, non-electric welding equipment, nuclear power generation, etc., can solve the problems of interface structure changes, reduce connection strength, etc., achieve tissue strength and structural performance guarantee, and shorten the process cycle Effect

Active Publication Date: 2020-06-30
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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Abstract

The invention belongs to the dissimilar material connecting technology, and particularly relates to a tungsten and heat sink material hot isostatic pressing connecting method. Welding faces of a tungsten block, a heat sink material and a pure iron intermediate layer are pretreated, a stainless steel wrapping sleeve is cleaned, the tungsten block, the heat sink material and the pure iron intermediate layer are subjected to vacuum baking for gas removal, and after a hot isostatic pressing wrapping sleeve is subjected to exhaust treatment, clamping seal and seal welding are conducted, a connectorwrapping sleeve seal body is placed in a hot isostatic pressing furnace, and after heat preservation and pressure maintaining are finished, cooling is conducted to the room temperature; and after theconnector wrapping sleeve seal body is subjected to heat preservation in a heating furnace, air cooling is conducted, the connector wrapping sleeve seal body is detached, and a connector is obtained.According to the method, the connector manufacturing technology steps and period are obviously reduced, and meanwhile generation of more brittle phases of an interface is avoided.

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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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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