A wire feedstock solid state additive manufacturing method based on alternating contact resistance heat

By employing alternating contact resistance heating and interfacial heating technology using cerium-zirconium co-doped yttrium aluminum garnet-titanium nitride nanocomposite modified materials, the problems of high heat input and low interfacial bonding strength in traditional metal wire additive manufacturing have been solved. This technology enables the forming of metal components with low heat input, low residual stress, and high quality, and is suitable for near-net-shape forming of alloy systems such as aluminum alloys, magnesium alloys, titanium alloys, and stainless steel.

CN122099526BActive Publication Date: 2026-07-21SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
Filing Date
2026-04-28
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Traditional additive manufacturing methods for metal wires suffer from problems such as high heat input, coarse microstructure, high residual stress, and unstable interfacial bonding strength. These issues are particularly problematic in the manufacture of large components, affecting the dimensional accuracy and mechanical properties of the formed parts. Furthermore, nanocomposite modified materials lack sufficient chemical stability at high temperatures, making it difficult to achieve precise control of interfacial resistance.

Method used

A solid-state additive manufacturing method for metal wires using alternating contact resistance heating is employed. By coating the surface of the metal wires with cerium-zirconium co-doped yttrium aluminum garnet-titanium nitride nanocomposite modified material, Joule heating generated by alternating current is used for interface heating. Combined with graded temperature control and infrared monitoring, selective fusion and metallurgical bonding at the interface are achieved, and the material is deposited layer by layer to form the final shape.

Benefits of technology

It significantly reduces heat input, minimizes thermal deformation and residual stress, improves the dimensional accuracy and mechanical properties of formed parts, achieves uniform distribution of interfacial resistance and high-temperature stability, and is suitable for near-net-shape forming manufacturing of various alloy systems.

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Abstract

The application discloses a metal wire solid-state additive manufacturing method based on alternating contact resistance heat in the technical field of additive manufacturing. The method is characterized in that: a nano-composite modified slurry is prepared and coated on the surface of a metal wire, and a modified wire is obtained by drying; the surface of a base body is subjected to ultrasonic cleaning and ion bombardment cleaning, and is fixed under the protection of inert gas; the modified wire is loaded into a wire feeding mechanism, and the contact angle and pressure are adjusted; an alternating power source is turned on to apply an alternating current, interface heating is performed by adopting staged temperature control, a metallurgical bonding layer is formed by maintaining the alternating current effect; after the power is turned off, the heating process is repeated by moving to the next deposition position, layer-by-layer fusion and superposition are realized, and finally a formed part is obtained. The application realizes the unification of interface selective fusion and solid-state additive, and obtains a dense metallurgical bonding interface and a metal additive manufacturing component with low residual stress.
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