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A kind of preparation method of tungsten-tantalum-rhenium refractory alloy

A kind of technology of refractory alloy and tungsten powder

Active Publication Date: 2020-02-07
CHONGQING UNIV OF ARTS & SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the traditional vertical melting sintering method requires large sample size and high energy consumption to produce tungsten and its alloys
[0004] To sum up, the current preparation method mainly has the disadvantages of complicated preparation process, high energy consumption, great environmental pollution, inability to produce smaller parts at one time, easy agglomeration during the preparation process, and easy shrinkage and pits, too much stress. It is easy to crack, the final product is easy to produce pores, and it is easy to form loose blocks. Tungsten is easy to be oxidized and the compactness is not good, the composition is uneven, and technical problems such as affecting mechanical properties need to be solved urgently.

Method used

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  • A kind of preparation method of tungsten-tantalum-rhenium refractory alloy
  • A kind of preparation method of tungsten-tantalum-rhenium refractory alloy
  • A kind of preparation method of tungsten-tantalum-rhenium refractory alloy

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Embodiment 1

[0023] The preparation of embodiment 1 tungsten-tantalum-rhenium refractory alloy:

[0024] (1) Raw material handling

[0025] The mass percentage of the mixture is tungsten powder: tantalum powder: rhenium powder = 95:3:2 (the total amount of ingredients is 50g). The particle sizes of the three powders are: rhenium powder 500 mesh, tungsten powder 500 mesh, tantalum powder 400 mesh. The inner lining of the ball mill tank is made of ceramic material, using ceramic balls with a diameter of 10 mm as the balls, the ball-to-material ratio is 10:1, the process control agent is 23% absolute ethanol, and the ball milling time is 36 hours. After the raw materials are ball-milled, they are cleaned twice with absolute ethanol, each time with 650 g of absolute ethanol, and then placed in a centrifuge to set the centrifugal speed at 1500 rpm, and the centrifugation time is 2 minutes for separation. Drying was carried out in a vacuum drying oven, the temperature was set at 65° C., and th...

Embodiment 2

[0042] The preparation of embodiment 2 tungsten-tantalum-rhenium refractory alloy:

[0043] (1) Raw material handling

[0044] The mass percentage of the mixture is tungsten powder: tantalum powder: rhenium powder = 95:3:2 (the total amount of ingredients is 50g). The particle sizes of the three powders are: rhenium powder 500 mesh, tungsten powder 500 mesh, tantalum powder 400 mesh. The inner lining of the ball mill tank is made of ceramic material, using ceramic balls with a diameter of 10 mm as the balls, the ball-to-material ratio is 10:1, the process control agent is 25% absolute ethanol, and the ball milling time is 48 hours. After the raw materials are ball-milled, they are cleaned twice with absolute ethanol, each time with 750 g of absolute ethanol, and then placed in a centrifuge to set the centrifugal speed at 2000 rpm, and the centrifugation time is 2 minutes for separation. Drying was carried out in a vacuum drying oven, the temperature was set at 70° C., and th...

Embodiment 3

[0050] Preparation of embodiment 3 tungsten-tantalum-rhenium refractory alloy:

[0051] (1) Raw material handling

[0052] The mass percentage of the mixture is tungsten powder: tantalum powder: rhenium powder = 95:3:2 (the total amount of ingredients is 50g). The particle sizes of the three powders are: rhenium powder 500 mesh, tungsten powder 500 mesh, tantalum powder 400 mesh. The inner lining of the ball mill tank is made of ceramic material, using ceramic balls with a diameter of 10 mm as the balls, the ball-to-material ratio is 10:1, the process control agent is 20% absolute ethanol, and the ball milling time is 24 hours. After the raw materials are ball-milled, they are cleaned twice with absolute ethanol, each time with 500 g of absolute ethanol, and then placed in a centrifuge with a centrifugal speed of 1000 rpm and a centrifugation time of 2 minutes for separation. Drying was carried out in a vacuum drying oven, the temperature was set at 60° C., and the drying ti...

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Abstract

A preparation method of a tungsten-tantalum-rhenium refractory alloy uses tungsten powder, tantalum powder, rhenium powder, and absolute ethanol as raw materials, and undergoes steps such as raw material ball milling treatment, deoxidation treatment, laser sintering, secondary sintering, and sample post-treatment. be made of. The invention can directly produce small parts, and the finished product has uniform surface, no pits, no pores, uniform material, compact structure, no cracking phenomenon, good product density, greater than 99%, high product hardness, can be Up to 870.7, good toughness, high melting point, can be as high as 3450 ° C, the preparation process is simple and feasible, energy saving and environmental protection, can directly prepare parts with simple shapes, the average grain size of the product is 3.4 μm, the grain size distribution is uniform, close to Axial crystals with uniform density, the average density is 19.2g / cm 3 , worthy of market promotion and application.

Description

technical field [0001] The invention relates to a preparation method of a refractory alloy, in particular to a preparation method of a tungsten-tantalum-rhenium refractory alloy. Background technique [0002] Tungsten is a high-yield element in my country. In order to make full use of tungsten resources, enrich the content of solid chemistry, search for new solid luminescent materials and catalysts with high catalytic activity, the synthesis, properties, reaction mechanism and application of tungstate, especially polytungstate Applications have received extensive attention, and research is very active. [0003] Metal tungsten and its alloys are important refractory alloy materials widely used in filaments, high-temperature thermocouples, etc. Metal tungsten is the metal material with the highest melting point found so far, and its melting point reaches 3410 ° C. However, metal tungsten itself has poor toughness and shock resistance and cannot To meet the needs of vibration p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/04C22C27/04C22F1/18B22F3/105B33Y10/00
CPCC22C1/045C22C27/04C22F1/18B33Y10/00B22F10/00B22F10/322B22F10/34B22F10/36B22F10/64B22F10/28Y02P10/25
Inventor 姜山郑雅文邓莹伍太宾刘奇王小宇
Owner CHONGQING UNIV OF ARTS & SCI