A method for preparing a titanium alloy powder hot isostatic pressing forming complex thin-walled workpiece and application thereof

By employing multi-stage gradient heating, heat preservation and pressure holding, multi-gradient cooling, and stress-relief annealing processes, combined with chemical dissolution and low-stress processing, the problems of deformation and dimensional deviations in the hot isostatic pressing of titanium alloy powder have been solved. This has enabled the manufacturing of complex thin-walled titanium alloy parts with high precision and low deformation, which is suitable for the aerospace field.

CN122425209APending Publication Date: 2026-07-21SINO EURO MATERIALS TECH OF XIAN CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SINO EURO MATERIALS TECH OF XIAN CO LTD
Filing Date
2026-06-24
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

When preparing large-sized, complex, thin-walled parts by hot isostatic pressing of titanium alloy powder, problems such as abnormal deformation and dimensional deviations after processing are prone to occur. Existing technologies cannot fundamentally reduce the initial stress state of the blank, which affects the assemblability and service performance of the parts.

Method used

The process employs multi-stage gradient heating, heat preservation and pressure holding, multi-gradient cooling and stress-relief annealing, combined with chemical dissolution to remove the cladding and core, and low-stress processing and stabilization treatment to construct a complete stress control chain to suppress residual stress and deformation.

Benefits of technology

It enables high-precision, low-deformation manufacturing of complex thin-walled titanium alloy parts, significantly improving product qualification rate and performance consistency, ensuring dimensional stability of parts during long-term service, and is suitable for key components in the aerospace field.

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Abstract

The application belongs to the technical field of powder metallurgy, and particularly relates to a preparation method of titanium alloy powder hot isostatic pressing forming complex thin-walled workpiece and application. The method comprises the following steps: step one: a sleeve is prepared to form a sealed sleeve; step two: the sealed sleeve is subjected to multi-stage gradient heating, and then multi-gradient cooling treatment is performed; step three: the sealed sleeve is subjected to stress relief annealing treatment, and then the sleeve is removed to obtain a preform; step four: the preform is subjected to cleaning and hydrogen removal treatment, and then mechanical processing is performed, and the workpiece after mechanical processing is subjected to stabilization treatment to obtain a thin-walled workpiece. The application can not only systematically reduce the initial residual stress of the workpiece after hot isostatic pressing forming to the lowest level, but also homogenize the stress distribution from the micro level, and maximally weaken the macro residual stress caused by uneven cooling from the root, thereby laying a foundation for the overall stress stability of the workpiece.
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