Tungsten alloy and preparation method thereof

A technology of tungsten alloy and alloy elements, which is applied in the field of tungsten alloy and its preparation, can solve the problems of insufficient solid solution strengthening, incomplete solid solution of alloy elements, low plasticity and toughness, etc., to achieve increased strength and hardness, improved plasticity and Toughness, the effect of improving the plasticity and toughness of alloys

Active Publication Date: 2018-01-05
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the alloy elements in the existing tungsten alloy cannot be completely solid-dissolved into the tungsten matrix, the solid-solution streng

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0047] Example 1

[0048] Install the metal substrate on the working platform of the fiber laser (see figure 1 ), while controlling the gap between the powder spreading blade and the metal substrate to be 30μm, and taking the polygonal tungsten powder particles with no impurities and oxygen adsorption on the surface, the particle size of the tungsten powder is 36μm.

[0049] Use induction plasma spheroidizing equipment to spheroidize the tungsten powder, the voltage is 8.5kV, the current is 4.5A, the spheroidizing power is 35kW, the powder feeding speed is 1rpm, see the spherical powder figure 2 , The particle size of the spherical powder is 28μm.

[0050] Take as figure 2 In the spherical tungsten powder shown, 6% by weight of tantalum is added as an alloying element, and the two powders are mechanically mixed to obtain a tungsten alloy powder. Fill the mixed tungsten alloy powder into the powder silo.

[0051] Seal the forming cavity, evacuate to a relative vacuum of -90KPa, and i...

Example Embodiment

[0054] Example 2

[0055] Install the metal substrate on the working platform of the fiber laser (see figure 1 ), at the same time, control the gap between the powder spreading blade and the metal substrate to be 60 μm, and take the polygonal tungsten powder particles with no impurities and oxygen adsorption on the surface, and the particle size of the tungsten powder is 40 μm.

[0056] The powder is spheroidized using an induction plasma spheroidizing equipment, the voltage is 10kV, the current is 4.5A, the spheroidizing power is 38kW, the powder feeding speed is 1.5rpm, the spheroidizing powder, the particle size of the spherical powder is 25μm.

[0057] Taking spherical tungsten powder, adding 10% by weight of molybdenum as an alloying element, and mechanically mixing the two powders to obtain tungsten alloy powder. Fill the tungsten alloy powder into the powder silo.

[0058] Seal the forming cavity, evacuate to a relative vacuum of -100KPa, and input the protective gas argon into...

Example Embodiment

[0061] Example 3

[0062] Install the metal substrate on the working platform of the fiber laser (see figure 1 ), at the same time, control the gap between the powder spreading blade and the metal substrate to 80μm, and take the polygonal tungsten powder particles with no impurities and oxygen adsorption on the surface, and the tungsten powder particle size is 45μm.

[0063] The powder was spheroidized using an induction plasma spheroidizing equipment, the voltage was 9.5kV, the current was 6A, the spheroidizing power was 36kW, the powder feeding speed was 2rpm, the spheroidizing powder, the particle size of the spherical powder was 20μm.

[0064] Taking spherical tungsten powder, adding 10% by weight of niobium as an alloying element, and mechanically mixing the two powders to obtain tungsten alloy powder. Fill the tungsten alloy powder into the powder silo.

[0065] Seal the forming cavity, evacuate to a relative vacuum of -80KPa, and input protective gas argon into the forming cavi...

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Abstract

The invention relates to a tungsten alloy and a preparation method thereof. The alloy is composed of a tungsten matrix and alloy elements. The solid solution of alloying elements into the tungsten matrix, based on the XRD test, can give full play to the solid solution strengthening effect, improve the strength and hardness of the alloy, and improve the plasticity and toughness of the alloy at the same time. The invention also provides a 3D pure shape preparation method of this novel tungsten alloy part.

Description

technical field [0001] The invention relates to a tungsten alloy and a preparation method thereof, belonging to the field of materials. Background technique [0002] Tungsten is a refractory metal with high melting point, high density, high temperature strength and high hardness. It is widely used in medical, aerospace, defense weapons, fusion energy and other fields. However, pure tungsten has high hardness, becomes brittle at room temperature, is difficult to process directly, and has low ductility. It is this lack of ductility at room temperature that limits the further application of tungsten in industry. [0003] Improving the toughness of metal materials can start from two aspects. On the one hand, it is dealt with during alloy design. The most common research focus is to modify the apparent characteristics of the alloy (for example, grain size, reinforcement phase distribution, etc.), which can passivate the crack before the crack propagates and causes macroscopic f...

Claims

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Application Information

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IPC IPC(8): C22C27/04C22C1/04G21F1/08
Inventor 王殿政李恺伦余晨帆马静刘伟沈志坚
Owner TSINGHUA UNIV
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