High thermal conductivity low cost aluminum alloy and additive manufacturing method thereof

By designing an Al-Cu-Fe-Cr-Ti-Zr alloy and optimizing the selective laser melting process, the processing difficulty and cost issues of high thermal conductivity aluminum alloys in selective laser melting technology have been solved, resulting in aluminum alloy materials with high density and excellent mechanical properties, suitable for manufacturing high thermal conductivity precision components.

CN122189443APending Publication Date: 2026-06-12SHAANXI XINGHUAYE 3D TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHAANXI XINGHUAYE 3D TECH CO LTD
Filing Date
2026-04-21
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing high thermal conductivity aluminum alloys face challenges in selective laser melting (SLM) technology, including high processing difficulty, high cost, and susceptibility to cracking. This is particularly true when manufacturing complex morphologies and multifunctional components, which limits their integrated application in fields such as heat exchangers.

Method used

A high thermal conductivity, low-cost aluminum alloy containing Al, Cu, Fe, Cr, Ti, and Zr elements was designed. By optimizing the selective laser melting process parameters, alloy powder was prepared and the impurity content was controlled to form a nano-reinforcing phase and a heterogeneous nucleation core. The forming process was optimized to improve density and mechanical properties.

Benefits of technology

It achieves high density and excellent tensile mechanical properties of high thermal conductivity and low cost aluminum alloy, with room temperature tensile strength greater than 350MPa, yield strength greater than 200MPa, elongation greater than 6%, and thermal conductivity greater than 150 W/(m·K), making it suitable for 3D printing precision components.

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Abstract

The present application belongs to the technical field of metal product processing, and particularly relates to laser additive manufacturing and selective laser melting technology, and a high-thermal-conductivity low-cost aluminum alloy comprises the following elements in percentage by mass: Fe 0.5-1.5%, Cu 0.2-1.5%, Cr 0.8-1.3%, Ti 0.2-0.6%, Zr 0.2-0.6%, the balance being Al, and a small amount of impurities. The present application designs an alloy with Al, Cu, Fe, Cr, Ti and Zr as main elements, analyzes the porosity of the alloy prepared under different selective laser melting process parameters, obtains the variation trend of the density of the alloy with the process parameters, analyzes the defect types and formation factors, obtains the optimal process parameters for preparing the alloy, and the deposited sample of the alloy has excellent tensile mechanical properties and thermal conductivity.
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