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High-W-content Ni-based amorphous alloy and preparation method thereof

An amorphous alloy and content technology, which is applied in the field of amorphous alloy material preparation, can solve the problems of increased energy consumption, complex composition, limited application, etc., and achieves the effects of low cost, simple composition, and simple amorphous composition.

Active Publication Date: 2015-01-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the above researchers choose noble metals such as Ru, Rh, and Ir when designing amorphous components, and the cost is relatively high; and although the research by Suo et al. uses W, Fe, B, and C, the cost of the alloy is relatively low, but its composition formula The total content of B and C with small and medium atomic radii is high, which causes serious volatilization during the preparation of master alloys by arc melting, resulting in difficulty in smelting. In addition, the high content of Fe makes the amorphous thin strips magnetic, which limits its use in special environments. application under
[0004] CN 101353771A discloses "a tungsten-based amorphous alloy". A series of amorphous thin strips prepared by this method have a relatively high crystallization temperature, but its components include W, Fe, Si, Cr, Mn, Mo, B, Co is a large amount of elements, the composition is very complex, and it uses tungsten block for arc melting. As we all know, tungsten has the highest melting point (3410°C) among all elemental metals. Mix evenly in the medium, resulting in increased energy consumption

Method used

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  • High-W-content Ni-based amorphous alloy and preparation method thereof
  • High-W-content Ni-based amorphous alloy and preparation method thereof
  • High-W-content Ni-based amorphous alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) By atomic fraction, the Ni content is 68.6%, the W content is 17.9%, the B content is 13.5%, and 50g of the material is prepared.

[0045] (2) Mix the ingredients in a roller ball mill for 6 hours at a speed of 200r / min, then press them into blocks at 200MPa, the diameter of the green body is 20mm, pre-fire at 850°C for 1.5 hours in a hydrogen atmosphere, and take out the furnace in three times to avoid oxidation .

[0046] (3) Put the pre-fired compact into a non-consumable vacuum arc melting furnace and vacuumize to 1×10 -5 Pa, then fill it with high-purity argon to 0.05MPa, and conduct 6 times of arc melting after the molten titanium absorbs oxygen.

[0047] (4) Put 4 g of uniformly smelted master alloy into a quartz tube, and place it in a vacuum belt throwing machine to prepare amorphous strips with high tungsten content, and the copper roller rotates at a speed of 30 m / s. The microhardness measured by a micro Vickers hardness tester is 8.5GPa, and the crysta...

Embodiment 2

[0049] (1) By atomic fraction, the Ni content is 66.6%, the W content is 19.9%, and the B content is 13.5%, and 50g of the material is prepared.

[0050] (2) Mix the ingredients in a roller mill for 6 hours at a speed of 200r / min, then press them into blocks at 200MPa, the diameter of the green body is 20mm, pre-fire at 860°C for 1.5 hours, and take out the furnace in three times to avoid oxidation .

[0051] (3) Put the pre-fired compact into a non-consumable vacuum arc melting furnace and vacuumize to 1×10 -5 Pa, then fill it with high-purity argon to 0.05MPa, and conduct 6 times of arc melting after the molten titanium absorbs oxygen.

[0052] (4) Put 5 g of uniformly smelted master alloy into a quartz tube, and place it in a vacuum belt throwing machine to prepare amorphous strips with high tungsten content, and the copper roller rotates at a speed of 30 m / s. The microhardness measured by a micro Vickers hardness tester is 10.2GPa, and the crystallization temperature mea...

Embodiment 3

[0054] (1) In terms of atomic fraction, the Ni content is 60.6%, the W content is 17.9%, the Nb content is 8%, and the B content is 13.5%, and 55g of the material is prepared.

[0055] (2) Mix the ingredients in a roller ball mill for 6 hours at a speed of 200r / min, then press them into blocks at 200MPa, the diameter of the green body is 20mm, pre-fire at 900°C for 1.5 hours in a hydrogen atmosphere, and take out the furnace in three times to avoid oxidation .

[0056] (3) Put the pre-fired compact into a non-consumable vacuum arc melting furnace and vacuumize to 1×10 -5 Pa, then fill it with high-purity argon to 0.05MPa, and conduct 6 times of arc melting after the molten titanium absorbs oxygen.

[0057] (4) Put 6g of uniformly smelted master alloy into a quartz tube, and place it in a vacuum belt throwing machine to prepare an amorphous strip with high tungsten content, and the copper roller rotates at a speed of 30m / s. The microhardness measured by a micro Vickers hardne...

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Abstract

The invention discloses high-W-content Ni-based amorphous alloy and a preparation method thereof. The amorphous alloy comprises the following components by atom fractions: 60%-69% of Ni, 17%-22% of W, 0%-8% of Nb and 13.5% of B. The preparation method comprises the following main steps: proportioning and evenly mixing original powder according to the components; shaping by pressing and pre-sintering consolidation; preparing a master alloy cast ingot by adopting vacuum electric arc melting; and preparing amorphous alloy strips by virtue of a vacuum melt spinning machine. The amorphous alloy disclosed by the invention is relatively simple in components, free of precious metal components, and relatively low in cost, and still has relatively high crystallization temperature and microhardness; the crystallization temperature of the crystal is 782-851K; the microhardness is 8.5-11.2GPa; the amorphous alloy has wide application prospect in friction and corrosion resistant materials; electric arc smelting is carried out by adopting a powder pre-sintering body; the energy consumption is lowered; and the prepared high-W-content Ni-based amorphous alloy has the advantages of high crystallization temperature, good heat stability, high hardness, simple components, good controllability, low cost and the like, and has wide application prospect.

Description

technical field [0001] The invention relates to a Ni-based amorphous alloy with high W content and a preparation method thereof. The invention belongs to the technical field of preparation of amorphous alloy materials. Background technique [0002] Compared with ordinary crystalline metal materials, amorphous alloys have the advantages of high strength, good toughness, high corrosion resistance, strong corrosion resistance, and superplasticity at a certain temperature, and have become new materials with great application potential. However, when the temperature exceeds the crystallization temperature, the amorphous state will transform into a crystalline phase, and the excellent properties of the amorphous state will be significantly weakened, which limits the application of amorphous alloys at higher temperatures. In general, amorphous alloys with high content of high melting point elements have higher crystallization temperature. Tungsten has a high melting point, so amo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/04C22C45/10C22C1/00
Inventor 刘文胜马运柱张佳佳叶晓珊吴亚瑜
Owner CENT SOUTH UNIV
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