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Refractory tungsten-tantalum alloy complex structural part and additive manufacturing forming method thereof

A complex structure, additive manufacturing technology, applied in the field of additive manufacturing to achieve the effect of reducing multiple processes

Active Publication Date: 2022-04-05
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a method for additive manufacturing of refractory tungsten-tantalum alloy complex structural parts in view of the limitations of the above-mentioned prior art in the preparation of tungsten-tantalum alloy materials and the manufacture of structural parts, which can realize Direct preparation of tungsten-tantalum alloy materials and direct forming of components with complex structural features

Method used

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  • Refractory tungsten-tantalum alloy complex structural part and additive manufacturing forming method thereof
  • Refractory tungsten-tantalum alloy complex structural part and additive manufacturing forming method thereof
  • Refractory tungsten-tantalum alloy complex structural part and additive manufacturing forming method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1. Put the tungsten-tantalum mixed powder in a vacuum drying oven, even the drying temperature is 100°C, the drying time is not less than 4 hours, and the powder is turned over at regular intervals to ensure sufficient drying.

[0036] Step 2. Put the dried tungsten-tantalum mixed powder into the powder supply cylinder of the forming equipment, install the scraper, level the substrate, and close the equipment hatch.

[0037] Step 3. Fill the equipment with high-purity argon gas so that the oxygen content inside the cavity is lower than 300ppm, and at the same time turn on the substrate heating, and set the substrate temperature to 150°C.

[0038] Step 4. Import the processed model into the equipment control software, set the process parameters including: laser power 300W, scanning speed 400mm / s, filling distance 0.08mm, powder layer thickness 0.03mm, scanning strategy is to rotate 67° layer by layer, and finally prepare A 10mm×10mm×5mm high-tungsten-tantalum alloy ...

Embodiment 2

[0040] In the example of the present invention, powder treatment and pre-forming treatment are identical with example 1, difference is:

[0041] The setting process parameters include: laser power 300W, scanning speed 300mm / s, filling distance 0.08mm, powder layer thickness 0.03mm, scanning strategy is to rotate 67° layer by layer, and finally prepare a high-tungsten-tantalum alloy block of 10mm×10mm×5mm , and its corresponding light microscope topography is shown in figure 2 shown.

Embodiment 3

[0043] In the example of the present invention, the powder treatment and pre-forming treatment are the same as Example 1, the difference is that the setting process parameters include: laser power 370W, scanning speed 300mm / s, filling distance 0.08mm, powder layer thickness 0.03mm, scanning strategy is By rotating 67° layer by layer, a high-tungsten-tantalum alloy block of 10mm×10mm×5mm was finally prepared, and its corresponding light microscope morphology is as follows image 3 shown.

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Abstract

According to the refractory tungsten-tantalum alloy complex structural part and the additive manufacturing forming method thereof, the mass fraction of tungsten in used tungsten-tantalum mixed powder is 95%, the mass fraction of tantalum is 5%, fine tantalum powder particles are adsorbed to the surfaces of tungsten particles through the tungsten-tantalum mixed powder, and a raw material wrapping the mixed powder is formed; the particle size of the tungsten powder particles is 5-25 [mu] m; the fine tantalum powder is in a submicron level; the refractory tungsten-tantalum alloy is obtained through tungsten-tantalum mixed powder based on laser powder bed melting additive manufacturing. According to the method, in-situ alloying of the tungsten-tantalum alloy can be achieved, tungsten and tantalum form a complete solid solution, and internal defects are few. Meanwhile, the tungsten-tantalum alloy complex structural part shows good formability, the size precision of the tungsten-tantalum alloy complex structural part is + / -0.1 mm, integrated direct manufacturing is achieved, the defects that the tungsten-tantalum alloy complex structural part cannot be directly obtained through traditional smelting and powder sintering, and the density is low are overcome, and the tungsten-tantalum alloy complex structural part has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, in particular to a refractory tungsten-tantalum alloy complex structural part and an additive manufacturing forming method thereof. Background technique [0002] Tungsten-tantalum alloy materials are widely used in aerospace, military industry, electronics and other industrial and civil fields due to their high density, high melting point, high hardness, corrosion resistance, low thermal expansion characteristics, and good thermal conductivity. At the same time, because it can suppress the surface bubbles under high-energy deuterium plasma irradiation and reduce the hydrogen retention under deuterium ion irradiation, it is of great significance as a nuclear fusion material in nuclear reactors. [0003] For the preparation and processing of tungsten-tantalum alloy materials, due to the high melting point, the existing processing and manufacturing methods are limited, usually smeltin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F10/28B22F10/85B22F1/17B33Y10/00B33Y80/00
CPCY02P10/25
Inventor 李俊峰魏正英薛凌峰叶天
Owner XI AN JIAOTONG UNIV
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