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Composite rare-earth oxide strengthened tungsten-base high-specific-gravity alloy composite material and preparation method thereof

A rare earth oxide and compound rare earth technology, applied in the field of metal materials, can solve the problems of limited strengthening effect of composite materials, unsatisfactory microstructure and mechanical properties, etc., and achieve excellent microstructure, comprehensive performance improvement, Improve the effect of element distribution

Active Publication Date: 2018-01-19
ZOLTRIX MATERIAL GUANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adding a single rare earth oxide to the composition does not change the process, and the strengthening effect on the composite material is limited, and the distribution of the binder phase, the microstructure and mechanical properties of the composite material are still not satisfactory.

Method used

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  • Composite rare-earth oxide strengthened tungsten-base high-specific-gravity alloy composite material and preparation method thereof
  • Composite rare-earth oxide strengthened tungsten-base high-specific-gravity alloy composite material and preparation method thereof
  • Composite rare-earth oxide strengthened tungsten-base high-specific-gravity alloy composite material and preparation method thereof

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Embodiment 1

[0041] The invention provides a composite rare earth oxide reinforced tungsten-based high specific gravity alloy composite material and a preparation method thereof. The method is carried out according to the following steps:

[0042]S01: Pre-mix the prepared tungsten-based high specific gravity alloy base powder and rare earth oxide powder evenly to obtain the mixed raw material, and then put the mixed raw material into a high-energy ball mill with a ball-to-material ratio of 5:1 for a ball mill. The ball milling time is 2h, the ball milling medium is anhydrous ethanol, the material of the ball milling tank is 304 stainless steel, and the rotation speed is 300r / min. Among them, the basic powder of tungsten-based high specific gravity alloy is micron-sized 93wt% tungsten powder, 4.9wt% nickel powder, 2.1wt% iron powder, and the composite rare earth oxide powder is submicron-sized Y 2 o 3 Powder and Dy 2 o 3 powder, and the addition of the rare earth oxide powder is 0.1wt% o...

Embodiment 2

[0048] The invention provides a composite rare earth oxide reinforced tungsten-based high specific gravity alloy composite material and a preparation method thereof. The method is carried out according to the following steps:

[0049] S01: Pre-mix the prepared tungsten-based high specific gravity alloy base powder and rare earth oxide powder evenly to obtain the mixed raw material, and then put the mixed raw material into a high-energy ball mill with a ball-to-material ratio of 5:1 for a ball mill. The ball milling time is 2h, the ball milling medium is anhydrous ethanol, the material of the ball milling tank is 304 stainless steel, and the rotation speed is 300r / min. Among them, the basic powder of tungsten-based high specific gravity alloy is micron-sized 93wt% tungsten powder, 4.9wt% nickel powder, 2.1wt% iron powder, and the rare earth oxide powder is submicron-sized Y 2 o 3 Powder and Dy 2 o 3 powder, and the addition of the rare earth oxide powder is 0.4wt% of the bas...

Embodiment 3

[0055] The invention provides a composite rare earth oxide reinforced tungsten-based high specific gravity alloy composite material and a preparation method thereof. The method is carried out according to the following steps:

[0056] S01: Pre-mix the prepared tungsten-based high specific gravity alloy base powder and rare earth oxide powder evenly to obtain the mixed raw material, and then put the mixed raw material into a high-energy ball mill with a ball-to-material ratio of 5:1 for a ball mill. The ball milling time is 2h, the ball milling medium is anhydrous ethanol, the material of the ball milling tank is 304 stainless steel, and the rotation speed is 300r / min. Among them, the basic powder of tungsten-based high specific gravity alloy is micron-sized 93wt% tungsten powder, 4.9wt% nickel powder, 2.1wt% iron powder, and the rare earth oxide powder is submicron-sized Y 2 o 3 Powder and Dy 2 o 3 powder, and the addition of the rare earth oxide powder is 0.7wt% of the bas...

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Abstract

The invention provides a composite rare-earth oxide strengthened tungsten-base high-specific-gravity alloy composite material and a preparation method thereof. The composite material is composed of tungsten alloy base powder and 0.1-1.0wt% of composite rare-earth oxide particles, wherein composite rare-earth oxides are two or more of CeO2, DyO2, Y2O3 and Nd2O3. The preparation method for the composite rare-earth oxide strengthened tungsten-base high-specific-gravity alloy composite material mainly comprises steps of raw material pre-mixing, primary ball-milling, secondary ball-milling, activating and sintering and the like. Before the activating and sintering step, a mode of combining composite rear-earth oxide adding with secondary ball-milling is adopted, so that added substances can befined and homogenized, and uniform distribution and volume fraction of a bonding phase also can be improved, and therefore, the alloy has an excellent microscopic structure, a smaller W crystalline grain size and compactness of 98% or more; and the composite material is improved in comprehensive performance, and is of great significance on development and application of a high-toughness ultrafine-grain tungsten alloy.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a composite rare earth oxide reinforced tungsten-based high specific gravity alloy composite material and a preparation method thereof. Background technique [0002] Tungsten-based high specific gravity alloys are widely used in the defense industry, aerospace and Civilian industry is a very important dual-use material for both military and civilian use. In recent years, with the rapid development of science and technology, higher and newer requirements have been put forward for the comprehensive performance of tungsten-based high-density alloys. The performance of traditional tungsten-based high-density alloys is far from meeting the requirements for use. Therefore, how to further improve the performance of tungsten-based high-density alloys and develop high-strength, ultra-fine-grained tungsten-based high-density alloys is an important topic at present, and the general...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C27/04
Inventor 张雪辉李晓闲谢臣珍
Owner ZOLTRIX MATERIAL GUANGZHOU
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