A method for preparing a high-creep-resistant high-temperature-resistant titanium alloy powder

By employing multi-element alloying design and multi-stage purification processes, high-sphericity and high-purity titanium alloy powders were prepared, solving the problems of microstructure stability and creep deformation of titanium alloy powders under high-temperature service conditions. This meets the long-term service requirements of hot-end components of aero-engines and improves the stability and formability of high-temperature structural components.

CN122425212APending Publication Date: 2026-07-21CHONGQING SANHANG ADVANCED MATERIALS RES INST CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING SANHANG ADVANCED MATERIALS RES INST CO LTD
Filing Date
2026-06-20
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing titanium alloy powders are prone to problems such as decreased microstructure stability, grain coarsening, high-temperature strength decay and creep deformation under long-term high-temperature service conditions. They also suffer from alloy element segregation, excessive oxygen and nitrogen content and insufficient powder sphericity, making it difficult to meet the long-term high-temperature service requirements of hot-end components of aero engines.

Method used

Employing a multi-element alloying design, including a combination of aluminum, tin, zirconium, niobium, molybdenum, silicon, yttrium, and hafnium elements, combined with vacuum melting, remelting, gas atomization, multi-stage sieving, and deep purification processes, a high-sphericity, high-purity titanium alloy powder is formed, and a dense oxide protective layer is formed through passivation treatment.

Benefits of technology

It significantly improves the creep resistance, high temperature resistance and formability of titanium alloy powder, ensuring the stability of the structure and the uniformity of composition at high temperatures. It is suitable for additive manufacturing and hot isostatic pressing, improving the service reliability and service life of high-temperature structural components such as aero engines.

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Abstract

This invention discloses a method for preparing high creep-resistant and high-temperature resistant titanium alloy powder, relating to the field of titanium-based alloy technology. The titanium alloy powder composition includes 4%–8% aluminum, 1%–6% tin, 2%–8% zirconium, 1%–10% niobium, 0.5%–5% molybdenum, 0.05%–0.8% silicon, 0.01%–0.5% yttrium, and 0.5%–5% hafnium, with the balance being titanium and impurities. The titanium alloy melt is obtained by vacuum melting, cooled into alloy ingots, remelted, and then conveyed to an atomization system under high pressure under inert argon protection. Spherical titanium alloy powder is obtained by gas atomization; after multi-stage sieving and deep purification, impurities are removed and the oxygen, nitrogen and hydrogen content is reduced. The purified titanium alloy powders of different particle sizes are mixed and stored in an inert atmosphere; the atomization pressure is 3MPa to 10MPa, the powder particle size is 15μm to 53μm or 45μm to 105μm, the sphericity is not less than 95%, and the oxygen content is ≤0.15wt%, nitrogen content is ≤0.03wt%, and hydrogen content is ≤0.01wt%. This invention has excellent high-temperature stability, high creep resistance and good formability.
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Citation Information

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