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Tungsten alloy material and preparation method thereof

A technology of tungsten alloy and mixed raw materials, which is applied in the field of tungsten alloy materials and its preparation, can solve the problems of mixed powder particle size, uneven mixing, large liquid phase sintering shrinkage, and difficulty in controlling the size and groove

Inactive Publication Date: 2017-06-06
深圳市威勒科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In liquid phase sintering, if the liquid phase quantity of the sintered body is not properly controlled or the particle size and mixing of the mixed powder are uneven, deformation is likely to occur and the mechanical properties will decrease.
And the shrinkage of liquid phase sintering is large, and the size groove is difficult to control

Method used

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  • Tungsten alloy material and preparation method thereof
  • Tungsten alloy material and preparation method thereof
  • Tungsten alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Weigh 200 g of each raw material powder according to the proportioning ratio in Table 1, and mix well;

[0022] Table 1 Raw material formula of tungsten alloy

[0023] powder purity(%) Proportion (mass fraction%) W Not less than 99.9% 92 Ni Not less than 99.5% 3 Fe Not less than 99.5% 2 Cu Not less than 99.5% 1.5 Re Not less than 99.5% 1 CeO 2

Not less than 99.0% 0.5

[0024] 2) Add the above-mentioned mixed raw materials, 150ml of ethanol, and 1kg of cemented carbide balls into a ball mill jar, grind for 48 hours at a speed of 350r / min in an argon atmosphere, and dry the ground powder under an infrared lamp for 10 minutes;

[0025] 3) Put the mixture powder obtained by high-energy ball mill alloying into the graphite mold, then put the graphite mold into the discharge plasma system for discharge plasma sintering, and ensure that the center of the powder is aligned with the temperature measurement po...

Embodiment 2

[0028] 1) Weigh 200g of each raw material powder according to the proportioning in Table 2, and mix well;

[0029] Table 2 Raw material formula of tungsten alloy

[0030]

[0031]

[0032] 2) Add the above-mentioned mixed raw materials, 150ml of ethanol, and 1kg of cemented carbide balls into a ball mill jar, grind for 48 hours at a speed of 350r / min in an argon atmosphere, and dry the ground powder under an infrared lamp for 10 minutes;

[0033] 3) Put the mixture powder obtained by high-energy ball mill alloying into the graphite mold, then put the graphite mold into the discharge plasma system for discharge plasma sintering, and ensure that the center of the powder is aligned with the temperature measurement point. The graphite mold has a dense inner diameter of Φ20, and the powder and the graphite mold are separated by carbon paper. The graphite mold is placed in a pre-pressing machine, and the pressure is applied to 10MPa between the upper and lower pressure heads o...

Embodiment 3

[0036] 1) Weigh 200g of each raw material powder according to the proportioning in Table 3, and mix well;

[0037] Table 3 Raw material formula of tungsten alloy

[0038]

[0039]

[0040] 2) Add the above-mentioned mixed raw materials, 150ml of ethanol, and 1kg of cemented carbide balls into a ball mill jar, grind for 48 hours at a speed of 350r / min in an argon atmosphere, and dry the ground powder under an infrared lamp for 10 minutes;

[0041] 3) Put the mixture powder obtained by high-energy ball mill alloying into the graphite mold, then put the graphite mold into the discharge plasma system for discharge plasma sintering, and ensure that the center of the powder is aligned with the temperature measurement point. The graphite mold has a dense inner diameter of Φ20, and the powder and the graphite mold are separated by carbon paper. The graphite mold is placed in a pre-pressing machine, and the pressure is applied to 10 MPa between the upper and lower pressure heads of...

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Abstract

The invention discloses a tungsten alloy material and a preparation method thereof and belongs to the technical fields of non-ferrous metal smelting and rolling. The tungsten alloy material comprises the following metallic elements of, by mass, 85-92% of W, 3-7% of a metallic element a, 1-5% of a metallic element b and 0.5-1% of a rear earth oxide, wherein the metallic element a is one or more of Ni, Fe and Cu; the metallic element b is one or more of Mo, Zr, Hf, Re, Nb, V and Ta; the rear earth oxide is one or more of rear earth oxides; the mass percent of Re of the metallic element b is no less than 1%; and the mass percent of CeO2 is no less than 0.5%. According to the tungsten alloy material and the preparation method thereof provided by the invention, raw materials in the tungsten alloy formula are easy to obtain, the process is simple, and the prepared tungsten alloy material has the advantages of small grain size, high density, strength and hardness, good ductility and machinability and the like.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal smelting and rolling processing, and in particular relates to a tungsten alloy material and a preparation method thereof. Background technique [0002] With the rapid development of science and technology and the continuous improvement of armor protection technology, the requirements for tungsten alloy materials are getting higher and higher, especially the high strength and good toughness under the premise of ensuring high density. Therefore, how to improve and improve the strength and plasticity of tungsten alloy after deformation strengthening is one of the current important research topics. The main factors affecting the strength and plasticity of tungsten alloy materials for bombs are composition design and process design. [0003] The most traditional preparation methods of tungsten alloy are powder making, pressing, and liquid phase sintering. The sintering temperature is high, th...

Claims

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Application Information

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IPC IPC(8): C22C27/04C22C1/05C22C1/10
CPCC22C27/04C22C1/05
Inventor 徐玄欧邯顾进跃
Owner 深圳市威勒科技股份有限公司
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