Brazing connection method for W/CuCrZr poling module

A connection method and brazing technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of low efficiency, complicated process, unsuitable for large-scale industrial production, etc., and achieve high efficiency, simple process and high degree of integration good effect

Inactive Publication Date: 2017-05-31
SOUTHWESTERN INST OF PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned prior art, the object of the present invention is to provide a brazing connection method of W / CuCrZr through-pipe module, which solves the problems of low efficiency, complex process and unsuitability for large-scale industrial production in the prior art.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A brazing connection method of a W / CuCrZr pipe-through module of the present invention, the method comprises the following steps:

[0031] Step 1. Copper-tungsten connection;

[0032] (1) Drill the tungsten block, pretreat the inner wall of the tungsten block hole, and remove the oil, impurities and oxide film on the inner wall of the hole;

[0033] The tungsten block is industrial pure tungsten;

[0034] (2) Position the tungsten block processed in step (1) in the graphite casting mold, insert a graphite cylinder into the center of the hole of the tungsten block to assemble a heating workpiece, the radius of the graphite cylinder is smaller than the radius of the inner hole of the tungsten block, and ensure that the The inner hole of the block is coaxial, and the annular cavity is constructed in the inner hole of the tungsten block through the graphite casting mold; the pure copper is placed on the top of the graphite casting mold, just above the annular cavity;

[0...

Embodiment 2

[0049] A brazing connection method of a W / CuCrZr pipe-through module of the present invention, the method comprises the following steps:

[0050] Step 1. Drill the tungsten block, the inner diameter of the hole is 17mm, pre-treat the inner wall of the hole, remove the oil, impurities and oxide film on the inner wall of the hole; put the tungsten block into the graphite mold and assemble it into a heating workpiece. A graphite cylinder with a diameter of 13mm is inserted into the center of the inner hole of the block to form an annular cavity; the pure copper is selected as high-conductivity oxygen-free pure copper with a purity greater than 99.9999wt.%. Put the assembled heated workpiece into the vacuum heating furnace, heat until the pure copper melts, and the liquid pure copper flows into the annular cavity; after heating, the heated workpiece is cooled to room temperature with the furnace; then take out the workpiece, remove the graphite cylinder, and place it in the tungste...

Embodiment 3

[0053] A brazing connection method of a W / CuCrZr pipe-through module of the present invention, the method comprises the following steps:

[0054] Step 1. Drill the tungsten block, the inner diameter of the hole is 17mm, pre-treat the inner wall of the hole, remove the oil, impurities and oxide film on the inner wall of the hole; put the tungsten block into the graphite mold and assemble it into a heating workpiece. A graphite cylinder with a diameter of 15mm is inserted into the center of the inner hole of the block to form an annular cavity; the pure copper is selected as high-conductivity oxygen-free pure copper with a purity greater than 99.9999wt.%; put the assembled heating workpiece into a vacuum heating furnace and heat until the pure copper melts , liquid pure copper flows into the annular cavity; after heating, the heated workpiece is cooled to room temperature with the furnace; then the workpiece is taken out, the graphite cylinder is removed, and a 1mm thick pure cop...

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Abstract

The invention belongs to the technical field of metal materials and relates to a brazing connection method for a W/CuCrZr poling module. The method is implemented through the following steps that firstly, oil stains, impurities and oxide films on the to-be-welded surface of a tungsten block with a drilled hole are removed; secondly, a layer of oxygen-free copper is cast onto the inner hole of the tungsten block by using a graphite casting die; a CuCrZr alloy pipe, solder and a tungsten block composite block are assembled, the solder is placed between pure copper liners of the CuCrZr alloy pipe and the tungsten block composite block, and then an assembly is put into a vacuum brazing furnace for welding; after completion of brazing, the assembly is quickly cooled to 470-480 DEG C and then is subjected to heat preservation at the temperature for 2-3h, and the W/CuCrZr poling module is formed, wherein the W/CuCrZr poling module comprises the CuCrZr alloy pipe, a brazing layer, a pure copper layer and the tungsten block in sequence from inside to outside. By means of the method, the efficiency is high, and a weld joint is combined well. The method has the advantages that the process is simple, and the preparation cost is low, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and relates to a brazing connection method of a W / CuCrZr pipe-through module. Background technique [0002] Fusion reactors such as the International Thermonuclear Reactor (ITER) and the future Fusion Demonstration Reactor (DEMO) require excellent first wall and divertor components (usually of modular construction for ease of maintenance) due to very high wall loads. The heat removal capability and the safety and stability of the modules in the fusion environment necessitate the development of plasma-facing components with active cooling. [0003] For example, the divertor of ITER will adopt an all-tungsten structure, and the divertor mainly adopts two forms, the dome part adopts a flat structure, and the target plate part adopts a through-tube structure. [0004] The traditional connection technology of W-CuCrZr through-pipe structure mainly includes hot isostatic pressing, expansion tu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/008B23K1/20B23P15/00
CPCB23K1/008B23K1/0008B23K1/20B23P15/00
Inventor 练友运王建豹封范刘翔谌继明
Owner SOUTHWESTERN INST OF PHYSICS
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