金属材料挤出成型（Metal Material Extrusion, MME）是采用金属粉末与聚合物粘结剂混合丝材为原料，通过成型、脱脂和烧结工艺（Shaping-Debinding-Sintering, S-D-S）制造纯金属零部件的一种增材制造技术。随着MME技术的发展，亟需对其制品的抗冲击性能进行研究，然而相关信息非常匮乏。本文制备了不同过程参数下的MME试件，并采用夏比摆锤冲击试验研究了其抗冲击性能，探讨了成型方向、填充角度、挤出温度、床温及成型速度等过程参数对试件冲击吸收功的影响。结果表明，填充角度为45°时，侧置方向成型试件的抗冲击性能最佳，水平方向次之，竖直方向最差；而在0°填充角度下，水平方向成型试件性能最好；进一步提高挤出温度、床温并降低成型速度，可以显著增强试件的抗冲击性能。研究结果为优化MME成型参数提供了理论依据，拓展了其在承受冲击载荷场景下的应用潜力。

Metal Material Extrusion (MME) technology, using a mixture of metal particles and polymer binders as materials, is one of the additive manufacturing techniques producing pure metal parts through shaping, debinding and sintering processes (S-D-S). This paper aims to systematically study the impact resistance performance of 17-4PH stainless steel parts fabricated by Metal Material Extrusion (MME) to address the lack of attention given to this property in existing research. Six groups of specimens were prepared, and their impact resistance was evaluated using Charpy impact tests. The experiments investigated the effects of forming direction, infill angle, extrusion temperature, bed temperature, and forming speed on the impact absorption energy of the specimens. The results indicated that, at a 45° infill angle, the edge-oriented specimens exhibited the highest impact resistance, followed by the horizontally-oriented specimens, with the vertically-oriented ones performing the worst. At a 0° infill angle, the horizontally-oriented specimens demonstrated the best performance. Moreover, increasing extrusion temperature and bed temperature while reducing forming speed significantly improved the impact resistance of the specimens. The findings provide theoretical support for optimizing MME forming parameters and expand its potential applications in scenarios requiring impact load resistance.