旁路电弧增材制造铝锂合金工艺研究

Research on Bypass Arc Additive Manufacturing Process of Al-Li Alloy

  • 摘要: 提出一种新型旁路电弧定向能沉积原位制备Al-Cu-Li合金的方法,该工艺采用ER2319作为主丝材,并通过旁路送进2A97条状中间合金,制备Al-Cu-Li合金。通过对不同工艺沉积构件宏观形貌、金相组织及显微硬度分析,选择CMT-P工艺进行旁路电弧增材制造成形试验。改变焊接电流、增材速度和旁路送进速度进行单道熔敷试验,观察单道焊缝表面及横截面形貌,确定了成形过程中的较优参数,并据此设定旁路中间合金的送进速度。该新型旁路送进技术,为高强铝合金的增材制造原位合成提供了新的选择。

     

    Abstract: A novel method for in-situ preparation of Al-Cu-Li alloy by bypass arc directed energy deposition is proposed. This process uses ER2319 as the main wire material and introduces 2A97 strip-shaped intermediate alloy through the bypass to prepare Al-Cu-Li alloy. By analyzing the macroscopic morphology, metallographic structure, and microhardness of components deposited by different processes, the CMT-P process was selected for bypass arc additive manufacturing forming experiments. Single-pass deposition experiments were conducted by varying the welding current, deposition speed, and bypass feeding speed. The surface and cross-sectional morphology of the single-pass weld were observed, and the optimal parameters during the forming process were determined. Based on this, the feeding speed of the bypass intermediate alloy was set. This new bypass feeding technology provides a new option for the in-situ synthesis of high-strength aluminum alloy additive manufacturing

     

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