Powder material additive manufacturing method, system and apparatus using cooling medium circulation

By adopting cooling medium circulation and pulse thermal disturbance mode in powder material additive manufacturing, the temperature gradient reduction and cooling rate slowdown caused by heat accumulation are solved, and the refinement of microstructure and the improvement of mechanical properties are achieved.

CN120243977AActive Publication Date: 2025-07-04NORTHWESTERN POLYTECHNICAL UNIV
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Patent Information

Application Number
CN202510741624.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-05
Publication Date
2025-07-04
Estimated Expiration
2045-06-05

AI Technical Summary

Technical Problem

In the process of additive manufacturing of powder materials, the temperature gradient and cooling rate slowdown caused by heat accumulation affect the microstructure and mechanical properties of three-dimensional components. The prior art is difficult to effectively derivatize heat, resulting in grain coarsening and mechanical properties degradation.

Method used

The cooling medium circulation method is adopted, by setting a cooling circulation channel in the forming base, and using a pulse pump and temperature monitoring unit to control the erosion frequency and flow rate of the cooling medium in real time, the periodic pulse thermal disturbance mode is realized, the cooling efficiency is improved, and the microstructure is refined.

Benefits of technology

The cooling rate and temperature gradient of three-dimensional components are significantly improved, the microstructure is refined, and the mechanical properties and forming quality of the components are improved.

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Abstract

The invention relates to a powder material additive manufacturing method, system and equipment applying cooling medium circulation, and the method comprises the steps that a geometric model of a target component is subjected to slicing and / or zoning analysis, so that at least one cooling area comprising at least one part of the target component is obtained, and an independent cooling medium control loop is arranged for each cooling area; according to the at least one cooling area and in combination with real-time temperature distribution and / or a process target, a preset periodic pulse thermal disturbance mode with cooling medium scouring frequency and flow velocity is distributed for the at least one cooling area and is applied to an energy beam scanning process; and when the energy beam scans to the cooling area on the forming base station, the corresponding cooling medium control loop is switched to the matched periodic pulse thermal disturbance mode. The heat accumulated by the forming base station is guided out in a targeted mode, the cooling rate of the formed part and the interior of a molten pool is increased, then the solidification microstructure is refined, and the mechanical property of the formed three-dimensional component is improved.
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