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A kind of preparation method of multi-component doped high specific gravity tungsten-copper-nickel alloy and the prepared high specific gravity tungsten-copper-nickel alloy

A high specific gravity, tungsten copper nickel technology, applied in the preparation of multi-doped high specific gravity tungsten copper nickel alloy, high specific gravity tungsten copper nickel alloy field, can solve the problems of poor mechanical properties, low density and so on, to improve the hardness, particle size and so on. The effect of uniform diameter and improved mechanical properties

Active Publication Date: 2021-10-26
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem solved by the present invention is to solve the problems of low density and poor mechanical properties of existing tungsten-based heavy alloys

Method used

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  • A kind of preparation method of multi-component doped high specific gravity tungsten-copper-nickel alloy and the prepared high specific gravity tungsten-copper-nickel alloy
  • A kind of preparation method of multi-component doped high specific gravity tungsten-copper-nickel alloy and the prepared high specific gravity tungsten-copper-nickel alloy
  • A kind of preparation method of multi-component doped high specific gravity tungsten-copper-nickel alloy and the prepared high specific gravity tungsten-copper-nickel alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method for preparing a multi-component doped high specific gravity tungsten-copper-nickel alloy, comprising the following steps:

[0038] (1) According to the percentage by weight, respectively weigh 90.5% pure tungsten powder with a purity of 99.8%, a particle size of 1.8-2.2 μm, 5% copper powder with a purity of 99.9%, a particle size of 35 μm, and 3% copper powder with a purity of 99.9% and a particle size 30 μm nickel powder, 0.5% yttrium oxide powder with a purity of 99.8% and a particle size of 30 μm, 0.5% zirconium hydride powder with a purity of 99.9% and a particle size of 1 μm, and 0.5% titanium powder with a purity of 99.7% and a particle size of 32.5 μm;

[0039] (2) The raw material powder weighed in the step (1) is carried out to be stirred and ball milled, and ball milled for 24h under the condition of argon atmosphere according to the ball-to-material ratio of 5:1, and the rotating speed is 500r / min, to obtain a mixed powder, obtained from figure 1 It ...

Embodiment 2

[0043] A method for preparing a multi-component doped high specific gravity tungsten-copper-nickel alloy, comprising the following steps:

[0044] (1) According to the percentage by weight, respectively weigh 89.5% pure tungsten powder with a purity of 99.8%, a particle size of 1.8-2.2 μm, 5% copper powder with a purity of 99.9%, a particle size of 35 μm, and 3% copper powder with a purity of 99.9%, with a particle size 30 μm nickel powder, 0.5% yttrium oxide powder with a purity of 99.8% and a particle size of 30 μm, 1.0% zirconium hydride powder with a purity of 99.9% and a particle size of 1 μm, and 1.0% titanium powder with a purity of 99.7% and a particle size of 32.5 μm;

[0045] (2) The raw material powder weighed in the step (1) is stirred and ball milled, and ball milled for 20 hours under an argon atmosphere according to a ball-to-material ratio of 5:1 and a rotating speed of 500r / min to obtain a mixed powder;

[0046] (3) High-temperature sintering: put the mixed po...

Embodiment 3

[0049] A method for preparing a multi-component doped high specific gravity tungsten-copper-nickel alloy, comprising the following steps:

[0050] (1) According to the weight percentage, respectively weigh 88.5% pure tungsten powder with a purity of 99.8%, a particle size of 1.8-2.2 μm, a 5% copper powder with a purity of 99.9%, a particle size of 35 μm, and a 3% pure tungsten powder with a particle size of 99.9%. 30 μm nickel powder, 0.5% yttrium oxide powder with a purity of 99.8% and a particle size of 30 μm, 1.5% zirconium hydride powder with a purity of 99.9% and a particle size of 1 μm, and 1.5% titanium powder with a purity of 99.7% and a particle size of 32.5 μm;

[0051] (2) The raw material powder weighed in the step (1) is stirred and ball milled, and ball milled for 18 hours under an argon atmosphere according to a ball-to-material ratio of 5:1 and a rotating speed of 500r / min to obtain a mixed powder;

[0052] (3) High-temperature sintering: put the mixed powder a...

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Abstract

The invention discloses a preparation method of a multi-component doped high-density tungsten-copper-nickel alloy, relates to the field of high-density alloy materials, and is proposed based on the problems of low density and poor mechanical properties of existing tungsten-based high-density alloys. The invention comprises the following steps: (1) weighing pure tungsten powder, copper powder, nickel powder, yttrium oxide powder, zirconium hydride powder and titanium powder as raw materials; (2) ball milling the raw materials for 18-24 hours; (3) calcining at high temperature. The present invention also provides the high-density tungsten-copper-nickel alloy prepared by the method for preparing the multi-component doped high-density tungsten-copper-nickel alloy. The present invention produces solid solution strengthening by doping trace amounts of yttrium oxide, zirconium, and titanium alloy elements in the alloy, and promotes sintering and densification, so that the tungsten-copper-nickel alloy after sintering is completely dense, and the highest density reaches 16.5g / cm 3 , even exceeding 16.31g / cm 3 Theoretical density; at the same time, the microhardness can reach up to 695.93HV, far exceeding the general high specific gravity tungsten-copper-nickel alloy.

Description

technical field [0001] The invention relates to the field of high specific gravity alloy materials, in particular to a method for preparing multi-component doped high specific gravity tungsten-copper-nickel alloy and the prepared high specific gravity tungsten-copper-nickel alloy. Background technique [0002] High specific gravity tungsten alloy is also called high density tungsten alloy. It is an alloy composed of tungsten as the matrix (the content accounts for more than 85%), adding elements such as copper, nickel and iron as the main binder phase, and adding a small amount of strengthening elements (such as molybdenum, titanium, etc.). Its microstructure is that the elemental tungsten particles are bonded by the liquid phase formed by the melting of alloying elements. Tungsten particles are a hard and brittle phase, and the binder phase is a tough phase. The high specific gravity tungsten alloy has such a composition and structure, which determines its excellent compre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C1/10C22C27/04
CPCC22C1/045C22C1/05C22C27/04
Inventor 刘东光张力罗来马吴玉程阮崇飞朱晓勇
Owner HEFEI UNIV OF TECH
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