A heat treatment method for improving the uniformity of the organization of hot spinning special-shaped titanium alloy and a ring part prepared by the method

By employing a two-stage heat treatment method involving medium-temperature pretreatment and high-temperature annealing, the problem of uneven microstructure in hot-spun irregular titanium alloy rings was solved, achieving uniformity of microstructure and consistent performance. This method is suitable for complex irregular titanium alloy rings in aerospace, shipbuilding and other fields.

CN122168864APending Publication Date: 2026-06-09GUIZHOU AVIATION TECHN DEV CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUIZHOU AVIATION TECHN DEV CO LTD
Filing Date
2026-03-03
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing heat treatment methods cannot coordinate the contradictory deformation energy storage gradients in the inner and outer regions of hot-spun irregular titanium alloy rings, resulting in uneven microstructure and affecting the consistency of component performance and service reliability.

Method used

A two-stage heat treatment method consisting of medium-temperature pretreatment and high-temperature annealing is adopted. The deformation energy storage gradient in different regions is adjusted by medium-temperature pretreatment, followed by controlled cooling and high-temperature annealing in the two-phase region to achieve microstructure homogenization.

Benefits of technology

It significantly improves the uniformity of the microstructure of titanium alloy rings, ensuring consistent grain size and phase ratio in each region, and enhancing the mechanical properties and reliability of the components.

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Abstract

This invention relates to the field of heat treatment technology for metallic materials, specifically to a heat treatment method for improving the uniformity of microstructure in hot-spun irregularly shaped titanium alloys and the ring component prepared therefrom. The heat treatment method includes the following steps: S1, heating the ring component after hot spinning to 500℃~700℃ and holding it at that temperature for the first time; S2, heating the ring component treated in step S1 to T using a heat treatment device. β -(20~60)℃, T β The ring is subjected to a second heat treatment to determine its β-phase transformation point; it is then cooled to 700℃~750℃ using a heat treatment device, and subsequently removed from the heat treatment device and air-cooled. This invention effectively flattens the deformation energy storage gradient under different initial modes through medium-temperature pretreatment, thereby coordinating the phase transformation and recrystallization kinetics in different regions of the cross-section, eliminating the inhomogeneity of the microstructure in hot-spun titanium alloy irregularly shaped rings, and obtaining an overall uniform and fine bimodal microstructure. It exhibits significant universality, practicality, and economy.
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