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Nano-tungsten alloy material and preparing method thereof

An alloy material and nano-tungsten technology, applied in the field of alloys, can solve the problems of insufficient strength and plasticity of tungsten alloys, difficult to process and form, recrystallization and embrittlement, etc., to reduce sticking balls and walls, improve performance, and increase tensile strength. Effect

Inactive Publication Date: 2018-07-13
江西澳科新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in addition to the disadvantages of low-temperature brittleness and recrystallization brittleness, metal tungsten also has the disadvantages of grain growth at high temperatures and resulting in recrystallization brittleness, low high-temperature strength, and due to the high hardness and high toughness of tungsten. Brittle transition temperature makes it difficult to process defects
As a result, the strength and plasticity of the tungsten alloy prepared in the later stage are insufficient.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Raw material: 4.1% Ni, 1.4% Fe, 0.25% Co, 94.25% W.

[0023] Metal tungsten is reduced tungsten powder, Ni powder is carbonyl nickel powder, Fe powder is reduced iron powder, and Co powder is reduced cobalt powder.

[0024] The Fischer particle size of tungsten powder is 2.04 μm, that of carbonyl nickel powder is 2.8 μm, that of reduced iron powder is less than 75 μm, and that of reduced cobalt powder is 1.9 μm.

[0025] Step 1, batching, according to weight percentage 4.1% Ni, 1.4% Fe, 0.25% Co, 94.25% W, carry out proportioning.

[0026] Step 2, ball milling, the metal powder with a good proportion is ball milled in a high-energy ball mill, the ball milling time is 20h, the ball-to-material ratio is 1:2, and argon gas is introduced as a protective atmosphere to make it into ultrafine particles, which can realize atomic mix of sizes;

[0027] Step 3. Mixing materials. Use a three-dimensional mixer to mix evenly. The three-dimensional mixer is especially suitable for ...

Embodiment 2

[0032] Raw materials: 4.5% Ni, 1.56% Fe, 0.32% Co, 93.62% W.

[0033] Metal tungsten is reduced tungsten powder, Ni powder is carbonyl nickel powder, Fe powder is reduced iron powder, and Co powder is reduced cobalt powder.

[0034] The Fischer particle size of tungsten powder is 2.04 μm, that of carbonyl nickel powder is 2.8 μm, that of reduced iron powder is less than 75 μm, and that of reduced cobalt powder is 1.9 μm.

[0035] Step 1, batching, according to weight percentage 4.1% Ni, 1.4% Fe, 0.32% Co, 93.62% W, carry out proportioning.

[0036] Step 2, ball milling, the metal powder with a good proportion is ball milled in a high-energy ball mill, the ball milling time is 20h, the ball-to-material ratio is 1:2, and argon gas is introduced as a protective atmosphere to make it into ultrafine particles, which can realize atomic mix of sizes;

[0037] Step 3. Mixing materials. Use a three-dimensional mixer to mix evenly. The three-dimensional mixer is especially suitable fo...

Embodiment 3

[0042] Raw materials: 4.55% Ni, 1.95% Fe, 0.5% Co, 93% W.

[0043] Metal tungsten is reduced tungsten powder, Ni powder is carbonyl nickel powder, Fe powder is reduced iron powder, and Co powder is reduced cobalt powder.

[0044] The Fischer particle size of tungsten powder is 2.04 μm, that of carbonyl nickel powder is 2.8 μm, that of reduced iron powder is less than 75 μm, and that of reduced cobalt powder is 1.9 μm.

[0045] Step 1, batching, according to weight percentage 4.55% Ni, 1.95% Fe, 0.5% Co, 93% W, carry out proportioning.

[0046]Step 2, ball milling, the metal powder with a good proportion is ball milled in a high-energy ball mill, the ball milling time is 20h, the ball-to-material ratio is 1:2, and argon gas is introduced as a protective atmosphere to make it into ultrafine particles, which can realize atomic mix of sizes;

[0047] Step 3. Mixing materials. Use a three-dimensional mixer to mix evenly. The three-dimensional mixer is especially suitable for mixi...

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Abstract

The invention discloses a nano-tungsten alloy material and a preparing method thereof. The nano-tungsten alloy material is mainly composed of metal tungsten and further comprises, by weight percent, 3.8 to 4.55% of Ni, 1.2 to 1.95% of Fe and 0.23 to 0.5% of Co, burdening, ball milling, mixing, pressing and sintering are adopted to make the nano-tungsten alloy. The prepared nano-tungsten alloy hasthe high density of 16.5 to 19.0g / cm<3>, the large proportion of 16.5 to 18.75 g / cm<3> and high strength, the tensile strength is 700 to 1000 MPa, and the alloy can be widely applied to the industriesof aerospace, aviation, military, medicine and the like.

Description

technical field [0001] The invention relates to the field of alloy technology, in particular to a nano-tungsten alloy material and a preparation method thereof. Background technique [0002] Nano-tungsten alloy is a two-phase composite material composed of body-centered cubic tungsten grains dispersed in low-melting ductile face-centered cubic metals (such as Fe, Ni, Co, Cu, etc.). The diversification of alloying elements and the expansion of application fields have led to more and more types of alloys covered by nano-tungsten alloys, so they are also referred to as "tungsten alloys" in many cases. The tungsten content of typical tungsten alloy is 80-98wt.%, and the average W grain size is 20-60μm. Tungsten alloy has a series of excellent properties such as high strength, high hardness, good ductility, good plasticity, good machinability, small thermal expansion coefficient, good corrosion resistance and oxidation resistance, and good electrical and thermal conductivity. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/04C22C1/04B22F3/10
CPCC22C27/04B22F3/1007B22F3/1017B22F2998/00B22F2998/10C22C1/045B22F1/0003B22F3/04B22F2201/013
Inventor 谢椿云吴涛吴九全李苏
Owner 江西澳科新材料科技股份有限公司
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