Preparation method of w-cu composition continuous gradient structure contact and contact

By using a three-screw, two-component, single-nozzle 3D printer and a solvent degreasing sintering process, a W-Cu compositionally gradient structure contact was prepared, which solved the performance mismatch problem of existing W-Cu alloy contact materials and achieved an optimized match between arc erosion resistance and conductivity.

CN119663034BActive Publication Date: 2026-05-29XIAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XIAN UNIV OF TECH
Filing Date
2025-01-22
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

The ablation performance and conductivity of existing W-Cu alloy contact materials are mutually restrictive. The interfacial thermal stress of the layered discontinuous gradient structure reduces the service life of the material. Moreover, existing functionally graded materials have discontinuous gradient structures, and the differences in composition lead to performance mismatch.

Method used

A continuous gradient structure of W-Cu composition was prepared using a three-screw dual-component single-nozzle 3D printer. By mixing feed A and feed B in an internal mixer, combined with solvent degreasing and sintering processes, a continuous gradient change of W-Cu composition was achieved, which improved the interfacial bonding strength and conductivity.

Benefits of technology

A reasonable match between the arc erosion resistance and overall conductivity of the W-Cu composition continuous gradient structure contact was achieved, improving the arc erosion resistance of the arc end while ensuring that the overall conductivity was not reduced.

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Abstract

The application discloses a preparation method of a W-Cu component continuous gradient structure contact and the contact, and specifically comprises the following steps: step 1, W powder and a binder are mixed by using a banbury mixer to obtain feed A, and Cu powder and the binder are mixed by using the banbury mixer to obtain feed B; step 2, the feed A and the feed B are mixed and printed and extruded by using a three-screw double-component single-nozzle 3D printer to obtain a W-Cu component continuous gradient structure composite green body; step 3, the W-Cu component continuous gradient structure composite green body is subjected to solvent degreasing, drying and thermal degreasing to obtain a W-Cu component continuous gradient structure composite degreasing body; step 4, the W-Cu component continuous gradient structure composite degreasing body is sintered to obtain a W-Cu component continuous gradient structure composite material; and step 5, the W-Cu component continuous gradient structure composite material is machined to obtain the W-Cu component continuous gradient structure contact. The W phase and the Cu phase in the contact obtained by the method continuously and gradiently change in composition.
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