| abstract |
The invention belongs to the technical field of powder metallurgy materials, and relates to a flat die hot extrusion process of nickel-based powder superalloy FGH4096. Reduce the oxidation of the billet after high-temperature heating, reduce the oxide scale on the surface of the billet, which can reduce the resistance during the extrusion process, and also reduce the phenomenon of poor surface quality of the extruded bar due to too much scale; in addition, control the billet from the furnace. The transfer time to the extrusion table is less than or equal to 50s, and during this period, the glass lubricant is quickly and evenly sprayed on the surface of the blank to reduce the resistance and resistance during the extrusion process. This process can avoid cracking in the hot extrusion process of the billet, eliminate the original particle boundary (PPB), close the thermally induced pores, refine the grains, adjust the distribution of the precipitates, and also improve the plasticity and fatigue life. |