本文探讨了机械合金化Ａｌ－４．９Ｆｅ－４．９Ｎｉ粉末的无包套脱气封焊或烧结的直接经热静液挤压致密的可能性．同时研究了挤压比、挤压温度和粉末硬度对挤压力和合金性能的影响，以及获得接近理论密度的挤压棒材的工艺条件。结果表明，热静液挤压工艺可以使机械合金化粉末致密化而获得接近理论密度的挤压棒材。玻璃石墨挤压介质可有效地防止粉末压坯的进一步氧化，而使挤压棒具有优异的性能。 In this paper, the possibility of direct hydrothermal extrusion and densification of mechanically alloyed Al-4.9Fe-4.9Ni powder without envelope degassing and sealing or sintering was investigated. The effects of extrusion ratio, extrusion temperature and powder hardness on extrusion force and alloy properties, as well as the process conditions for obtaining extruded bars approaching the theoretical density, were investigated. The results show that hot hydrostatic extrusion process can make the mechanical alloying powder densification to obtain the theoretical density of the extruded bar. Glass graphite extrusion media can effectively prevent further oxidation of the powder compact, leaving the extrusion rod with excellent performance.