A laser additive manufacturing method for obtaining a duplex structure of a titanium alloy and a titanium alloy

By adjusting the process parameters of laser additive manufacturing, high-performance titanium alloy dual-phase microstructure components can be directly prepared, solving the problems of low material utilization and long manufacturing cycle in existing technologies, and realizing efficient and low-cost manufacturing of titanium alloy components.

CN117505877BActive Publication Date: 2026-06-23CAPITAL AEROSPACE MACHINERY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CAPITAL AEROSPACE MACHINERY
Filing Date
2023-10-24
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing laser additive manufacturing technology has difficulty in effectively controlling the two-phase microstructure of titanium alloy components, resulting in low material utilization, long manufacturing cycle, high cost, and insufficient microstructure strength, plasticity, and fatigue strength.

Method used

By adjusting the process parameters of laser additive manufacturing, including laser power, scanning rate, powder feeding rate and interlayer cooling time, the energy density and cooling rate of the deposited layer can be controlled, thereby achieving spheroidization control of the deposited layer micron-sized flakes and directly preparing dual-phase titanium alloy components.

Benefits of technology

This technology enables the manufacture of high-performance titanium alloy components without plastic deformation and subsequent heat treatment, shortening the manufacturing process, improving material utilization and mechanical properties, and reducing manufacturing costs.

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Abstract

The application discloses a laser additive manufacturing method for obtaining a titanium alloy dual-phase structure and a titanium alloy, and relates to the field of laser additive manufacturing of metal materials. The method comprises the following steps: S1, loading titanium alloy powder into a powder feeder; S2, fixing a substrate on a forming table in a closed argon warehouse; S3, after the water and oxygen content in the argon warehouse is less than 50 ppm, starting laser additive manufacturing, and melting and depositing the titanium alloy powder synchronously fed on the substrate; S4, after continuously depositing 3-4 layers, reducing the powder feeding rate to 20%-30% of the original powder feeding rate, keeping other laser additive manufacturing parameters unchanged, and continuously depositing a layer; and S5, repeating the steps S3 and S4 until the size requirement of the titanium alloy component is reached. Through the above method, the remelting depth is accurately controlled, the heat cycle effect is realized, the spheroidization regulation of the micron-thin sheet of the deposited layer sample is realized, and thus the titanium alloy component with the dual-phase structure is directly prepared.
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