Superfine tungsten-nickel-iron composite powder and preparation method thereof

By performing segmented carbon thermal reduction and deep hydrogen reduction treatment on WO3, NiO and Fe2O3 powders, combined with the nucleation and reduction effects of nanocarbon black particles, ultrafine tungsten-nickel-iron composite powder with uniform particle size distribution and high dispersion was successfully prepared. The problem of difficulty in preparing ultrafine tungsten-nickel-iron composite powder in the prior art was solved, and the fine crystallization of high-performance tungsten alloys was achieved.

CN119457042APending Publication Date: 2025-02-18NORTHWEST INSTITUTE FOR NONFERROUS METAL RESEARCH
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Patent Information

Application Number
CN202411605284.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-12
Publication Date
2025-02-18

AI Technical Summary

Technical Problem

The prior art is difficult to prepare ultrafine tungsten-nickel-iron composite powder with uniform particle size distribution and high dispersion at low cost and high efficiency, resulting in insufficient fine crystallization of tungsten alloys and difficult to meet the demand for high-performance tungsten alloys in cutting-edge technical fields.

Method used

WO3, NiO and Fe2O3 powders are used for segmented carbon thermal reduction and deep hydrogen reduction treatment. Nanocarbon black particles are used as nucleation agents and reducing agents to regulate the nucleation and growth process of WO3 reduction to W, which significantly improves the shape of W. The core rate reduces the particle size of W.

Benefits of technology

It has achieved the ultrafine tungsten-nickel-iron composite powder with uniform particle size distribution and high dispersion, which solved the problem of difficulty in preparing ultrafine tungsten-nickel-iron composite powder in the prior art. It is suitable for sintering and preparing fine crystal/ultra-fine crystal tungsten-nickel-iron alloys, and improved The density and mechanical properties of the alloy are obtained.

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Abstract

The invention discloses a preparation method of superfine tungsten-nickel-iron composite powder. The method comprises the following steps: 1, carrying out dry mixing, crushing and dispersing on WO3, NiO and Fe2O3 powder; 2, mixing with nano carbon black particles, and drying to obtain a mixture; 3, segmental carbon thermal reduction treatment; and fourthly, the superfine tungsten-nickel-iron composite powder is obtained through deep hydrogen reduction treatment. Nano carbon black particles are used as a nucleating agent and a reducing agent, the nucleation and growth process of reducing WO3 to W is effectively regulated and controlled, the nucleation rate of W is remarkably increased, the particle size of a reduction product is refined, regulation and control of the particle size of the tungsten-nickel-iron composite powder are achieved, and the superfine tungsten-nickel-iron composite powder which is uniform in particle size distribution and high in dispersion is obtained through hydrogen reduction; the method is simple in process, low in cost, suitable for large-scale industrialization and wide in application range, the density of the tungsten-nickel-iron alloy is effectively improved, and preparation of the high-performance tungsten-nickel-iron alloy material is facilitated.
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