A kind of high-strength tungsten-based alloy and its preparation method

A tungsten-based alloy and high-strength technology, which is applied in the field of high-strength tungsten-based alloys and their preparation, can solve problems such as difficulty in obtaining multi-principal alloys and less dendrite segregation

Active Publication Date: 2020-04-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

FeNiCoCrMn with relatively uniform composition, less dendrite segregation, and a simple solid solution structure was prepared in advance by high-temperature melting and high-pressure gas atomization. x Al y Multi-principal alloy powder, which overcomes the traditional method of using metal powder as raw material to prepare by high-energy ball milling method, and it is difficult to obtain multi-principal alloy with simple solid solution structure.

Method used

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  • A kind of high-strength tungsten-based alloy and its preparation method
  • A kind of high-strength tungsten-based alloy and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0028]A high-strength tungsten-based alloy material with a mass fraction of FeNiCoCrAl of 10% was prepared. 1) Prepare FeNiCoCrAl (mole fraction) multi-principal alloy powder. The raw materials are high-purity iron, nickel, cobalt, chromium, aluminum and other bulk metal materials, which are melted into a multi-principal alloy melt at 1500 ° C. The melt is heated in high-purity argon FeNiCoCrAl multi-principal alloy powder (particle size: 10 microns) with a simple solid solution structure was atomized under air. 2) Weigh tungsten powder (with a particle size of 50 microns) and FeNiCoCrAl multi-principal alloy powder according to the mass fraction of 90% W and 10% FeNiCoCrAl multi-principal alloy powder. Time 8h, mix evenly, vacuum dry and sieve after ball milling, prepare W-FeNiCoCrMn x al y The composite powder (with a particle size of 40 microns) was then sintered in a vacuum hot-press sintering furnace at a sintering temperature of 1200° C., a pressure of 50 MPa, and a si...

Embodiment 2

[0030] A high-strength tungsten-based alloy material with a mass fraction of FeNiCoCrMn of 20% was prepared. 1) Prepare FeNiCoCrMn (mole fraction) multi-principal alloy powder. The raw materials are high-purity iron, nickel, cobalt, chromium, manganese and other bulk metal materials, which are melted into a multi-principal alloy melt at 1600 ° C. The melt is heated in high-purity argon FeNiCoCrMn multi-principal alloy powder (with a particle size of 50 microns) having a simple solid solution structure was atomized under air. 2) Weigh tungsten powder (with a particle size of 25 microns) and FeNiCoCrMn multi-principal alloy powder according to the mass fraction of 80% W and 20% FeNiCoCrMn multi-principal alloy powder. Time 30h, mix evenly, vacuum dry and sieve after ball milling, prepare W-FeNiCoCrMn x al y The composite powder (with a particle size of 21 microns) was then sintered in a vacuum hot-press sintering furnace at a sintering temperature of 1300° C., a pressure of 30...

Embodiment 3

[0032] A high-strength tungsten-based alloy material with a FeNiCoCr mass fraction of 20% was prepared. 1) Prepare FeNiCoCr (mole fraction) multi-principal alloy powder. The raw materials are high-purity iron, nickel, cobalt, chromium and other bulk metal materials, which are melted into a multi-principal alloy melt at 2000 ° C. The melt is under high-purity argon Atomized FeNiCoCr multi-principal alloy powder (particle size: 30 microns) with a simple solid solution structure. 2) Weigh tungsten powder (with a particle size of 10 microns) and FeNiCoCr multi-principal alloy powder according to the mass fraction of 80% W and 20% FeNiCoCr multi-principal alloy powder. Time 60h, mix evenly, vacuum dry and sieve after ball milling, prepare W-FeNiCoCrMn x al y The composite powder (with a particle size of 15 microns) is then sintered in a vacuum hot-press sintering furnace, the sintering temperature is 1500°C, the pressure is 30MPa, and the sintering time is 2.5h. The Vickers hard...

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Abstract

The invention relates to a high-strength tungsten-based alloy and a preparation method thereof, and belongs to the field of metal materials. The tungsten alloy is composed of tungsten and a FeNiCoCrMnxAly multi-component alloy, wherein the FeNiCoCrMnxAly multi-component alloy is provided by gas-atomized FeNiCoCrMnxAly multi-component powder. The preparation method for the high-strength tungsten-based alloy comprises the following steps: uniformly mixing tungsten powder with the FeNiCoCrMnxAly multi-component powder through a ball mill according to designed components; and performing vacuum hot-pressing sintering to obtain the high-strength tungsten-based alloy, wherein a sintering temperature is 1200-1500 DEG C, pressure is 10-50 MPa, and sintering time is greater than or equal to one hour. The designed and prepared tungsten-based alloy with a high-strength multi-phase structure can be used to the fields such as civil and military fields of aerospace, national defense and military industry, and the like, and can be suitable for industrial production.

Description

technical field [0001] The invention relates to a high-strength tungsten-based alloy and a preparation method thereof, belonging to the field of metal materials. Background technique [0002] Tungsten-based alloys have excellent properties such as high density, high strength and hardness, good electrical conductivity, low thermal expansion coefficient, high corrosion resistance and oxidation resistance, and can be used as armor-piercing projectile cores, shielding materials and contact materials, and are widely used in aerospace , national defense and military industry and other military and civilian fields. Tungsten-based alloys are formed by bonding hard and brittle tungsten particles with strong and tough metals such as Fe and Ni. As the service conditions become more and more severe, the traditional Fe and Ni bonded tungsten-based alloys are becoming more and more difficult to meet the demand, and more and more new bonding phases are being used. [0003] At present, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/04C22C1/04B22F3/14
Inventor 肖代红
Owner CENT SOUTH UNIV
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