Tungsten-copper composite material molded part and preparation method thereof

By adding reinforcing phases and activating elements to modify tungsten powder in tungsten-copper composites, and using molding agents and mechanical alloying methods, the problems of uneven microstructure and poor formability of tungsten-copper composite molded parts were solved, achieving low-cost preparation and performance improvement of large-size molded parts.

CN121992265APending Publication Date: 2026-05-08SHAANXI ZHONGTIAN ROCKET TECH CO LTD
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Patent Information

Application Number
CN202511969633.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-24
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

Tungsten-copper composite materials suffer from uneven microstructure distribution and poor physical and mechanical properties during the molding process. In particular, cracks and missing corners are prone to occur when preparing large-sized molded parts, resulting in waste of raw materials and high costs.

Method used

By adding reinforcing phases and activating elements to modify tungsten powder, and using a forming agent, a composite powder of modified and unmodified tungsten powder is prepared by mechanical alloying. This promotes the wetting and adhesion of the tungsten and copper phases, improves sintering performance, and utilizes the synergistic effect of multiple components to enhance formability and density.

Benefits of technology

This study improved the microstructure uniformity and overall performance of large-size tungsten-copper composite molded parts, reduced manufacturing costs, increased interfacial strength and density, and solved defects in the molding process.

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Abstract

The invention relates to a tungsten-copper composite material forming part and a preparation method thereof, and belongs to the technical field of metal composite materials. The raw materials of the forming part are composed of a tungsten source, a copper source and a forming agent. The tungsten source consists of modified tungsten powder and tungsten powder; the modified tungsten powder is obtained by adding a reinforcing phase and an activating element, wetting and adhesion of a tungsten phase and a copper phase can be promoted, the sintering performance of the formed part is improved, and the comprehensive performance of the formed part is improved; the forming agent is added to ensure that the powder has good flowability and formability, the problems that a large-size tungsten-copper blank is poor in compression molding formability and high in manufacturing cost are solved, and a tungsten-copper composite material formed part which is uniform in structural component, low in cost and easy to form is obtained. The preparation method comprises the following steps: dispersing an activating element and a reinforcing phase into tungsten powder through a ball milling method to obtain modified tungsten powder, adding double-granularity composite powder of the modified tungsten powder and unmodified tungsten powder into a forming agent to obtain easily-formed composite powder, and pressing the composite powder into a large-size tungsten copper green body, the method has the characteristics of low cost, good repeatability, controllable process, raw material saving and the like.
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