Preparation method of spherical tungsten-rhenium alloy powder with high rhenium and low oxygen

Spherical tungsten-rhenium alloy powder with high rhenium and low oxygen is prepared through ball milling, spray granulation and plasma spheroidization treatment, which solves the problems of rhenium uniformity and oxygen content in the existing technology and is suitable for key components such as high-temperature thermocouples.

CN119140825BActive Publication Date: 2025-09-12JIANGXI COPPER CORP +1
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Patent Information

Application Number
CN202411266229.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-09-09
Publication Date
2025-09-12
Estimated Expiration
2044-09-09

AI Technical Summary

Technical Problem

It is difficult to prepare spherical tungsten-rhenium alloy powder with good uniformity, low oxygen content and unlimited rhenium addition with existing technology. Traditional methods have problems such as insufficient rhenium uniformity and high oxygen content.

Method used

By mixing tungsten powder and rhenium powder in a ball mill, sending them to a spray dryer for spray granulation and plasma spheroidization treatment, controlling the oxygen content in the ball milling and spray drying processes, and combining them with rare gas plasma spheroidization treatment, spherical tungsten-rhenium alloy powder with high rhenium and low oxygen is prepared.

Benefits of technology

The spherical tungsten-rhenium alloy powder with good rhenium uniformity, low oxygen content and high sphericity is achieved, which is suitable for key components such as high-temperature thermocouples, aviation electromagnetic electromechanical contacts, nuclear fuel storage and high-temperature heat release elements.

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Abstract

The present invention discloses a method for preparing a spherical tungsten-rhenium alloy powder with high rhenium and low oxygen. The preparation method comprises the following steps: after tungsten powder and rhenium powder are proportioned, they are added to a ball mill for ball milling and mixing to obtain a uniform composite powder slurry; the composite powder slurry is sent to a spray dryer for spray granulation to form a quasi-spherical alloy powder; and the quasi-spherical powder is subjected to plasma spheroidization treatment to obtain a spherical tungsten-rhenium alloy powder. The preparation method of the present invention prepares a tungsten-rhenium suspension slurry with uniformly dispersed components, and then through granulation and spheroidization, successfully solidifies the uniform state of the suspension and simultaneously reduces oxygen and removes impurities, thereby preparing a spherical alloy powder with relatively large particle size and unrestricted rhenium addition. This technical route has a short process, strong process controllability, and is capable of pilot production. The prepared tungsten-rhenium alloy spherical powder has high density, sphericity and uniformity, and low oxygen content.
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