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High-toughness high-density multi-component alloy and preparation method thereof

A multi-component and high-toughness technology, applied in the field of high-strength, tough, high-density multi-component alloys and their preparation, can solve problems such as unfavorable alloy plasticity, and achieve high strength and solid solution strengthening effect.

Active Publication Date: 2022-08-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this high-entropy alloy exhibits good properties such as high density, high strength, and high hardness, the Ta contained in its structure 2 VO 6 The brittle phase is not conducive to the plasticity of the alloy, so that the alloy exhibits room temperature brittleness

Method used

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  • High-toughness high-density multi-component alloy and preparation method thereof
  • High-toughness high-density multi-component alloy and preparation method thereof
  • High-toughness high-density multi-component alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] According to the chemical formula W 50 Mo 10 V 5 Fe 22.4 Ni 12.6 (atomic percentage) for batching, the raw materials use metal powder corresponding to each pure element, put the metal powder into a ball mill jar with grinding balls under vacuum protection and seal it well, and put the metal powder into the ball mill jar. The ball mill runs for 15 hours; the ball-to-material ratio during ball milling is 10:1, and the speed of the ball mill is 300 revolutions per minute;

[0047] Then, take out the metal powder under vacuum protection, put it into a sintered abrasive tool and compact it; sinter the compacted embryo body under vacuum protection by the discharge plasma method, the sintering temperature is 1250 ℃, and the sintering time is 10 minutes; After sintering, a dense bulk material, the alloy of Example 1, was obtained.

[0048] attached by figure 1 XRD pattern shows that the multi-component alloy obtained in Example 1 is composed of a body-centered cubic (BCC)...

Embodiment 2

[0050] According to the chemical formula W 55 Mo 15 V 5 Fe 16 Ni 9 (atomic percentage) for batching, the raw materials use metal powder corresponding to each pure element, put the metal powder into a ball mill jar with grinding balls under vacuum protection and seal it well, and put the metal powder into the ball mill jar. The ball mill runs for 15 hours; the ball-to-material ratio during ball milling is 10:1, and the speed of the ball mill is 300 revolutions per minute;

[0051] Then, take out the metal powder under vacuum protection, put it into a sintered abrasive tool and compact it; sinter the compacted embryo body under vacuum protection by the discharge plasma method, the sintering temperature is 1250 ℃, and the sintering time is 10 minutes; After sintering, a dense bulk material, the alloy in Example 2, was obtained.

[0052] attached by Image 6 XRD pattern shows that the multi-component alloy obtained in Example 2 is composed of a BCC structure matrix, two FCC ...

Embodiment 3

[0054] According to the chemical formula W 50 Mo 10 V 5 Fe 22.4 Ni 12.6 (atomic percentage) for batching, the raw materials use metal powder corresponding to each pure element, put the metal powder into a ball mill jar with grinding balls under vacuum protection and seal it well, and put the metal powder into the ball mill jar. The ball mill runs for 15 hours; the ball-to-material ratio during ball milling is 10:1, and the speed of the ball mill is 300 revolutions per minute;

[0055] Then take out the metal powder under vacuum protection, put it into a sintered abrasive tool and compact it; sinter the compacted embryo body under the vacuum protection condition by the discharge plasma method, the sintering temperature is 1350 ℃, and the sintering time is 10 minutes; After sintering, a dense bulk material, the alloy in Example 3, was obtained.

[0056] attached by Figure 10 XRD pattern shows that the multi-component alloy obtained in Example 3 is composed of a BCC struct...

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Abstract

The invention discloses a high-toughness and high-density multi-component alloy and a preparation method thereof, and the high-toughness and high-density multi-component alloy is composed of the following components in atomic percent: 47-58% of W, 8-17% of Mo, 4-6% of V, 14-25% of Fe and 6-15% of Ni. The multi-component alloy with high strength and toughness and high density provided by the invention has the characteristics of a multi-phase structure consisting of a matrix with a body-centered cubic structure and other equal face-centered cubic structures, the mass density of the alloy is 13.8-17.5 g.cm <-3 >, the compressive yield strength at room temperature is 1000-2200 MPa, the ultimate compressive strength is 1800-3200 MPa, the compressive strain value is greater than 20%, and the Vickers hardness value is 4-12 GPa; the high-performance heavy alloy can be applied to the fields of aerospace, electronic products, national defense science and technology, heavy industry and the like.

Description

technical field [0001] The invention belongs to the technical field of metal material preparation, and particularly relates to a high-strength, toughness and high-density multi-component alloy and a preparation method thereof. Background technique [0002] High-density alloys usually have the characteristics of high strength and high hardness, and are widely used in aerospace, electronic products, defense technology and heavy industry. At present, the most common high-density alloy is tungsten-based heavy alloy, and its elemental composition usually contains more than 80wt% of W element and a small amount of other metal elements such as nickel, iron and copper. The microstructure of tungsten-based heavy alloys is usually composed of larger-sized tungsten grains and a binder phase formed by elements such as iron and nickel. In recent years, in order to improve the mechanical properties of tungsten-based heavy alloys, researchers have made many attempts in the preparation pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/04C22C1/04B22F3/14B22F3/105B22F9/04
CPCC22C27/04C22C1/045B22F3/14B22F3/105B22F9/04B22F2003/1051B22F2009/043Y02P10/25
Inventor 李志明胡鑫刘新利严定舜
Owner CENT SOUTH UNIV