本发明公开了一种细晶钼板的快速制备工艺，属于粉末冶金技术领域，包括以下步骤:(1)制粒;(2)压制;(3)微波烧结:在微波烧结炉中，真空条件下将生坯快速加热至1500~1600℃并保温10~40min，得到致密度大于95%的烧结钼板坯;(4)交叉轧制:在还原气氛下，将步骤(3)所得烧结钼板坯快速加热至1200~1400℃并保温20~40min，进行开坯交叉轧制,然后进行2~4道次加热轧制，每道次加热温度下调40~60℃，每道次加热轧制的变形量为20~25%,退火处理后，得到晶粒细小且均匀的钼板。本发明采用纳米粉末结合微波烧结技术对钼粉进行致密化，使得烧结坯晶粒细小，平均晶粒度为0.5~2um，显微组织均匀;采用交叉轧制后晶粒尺寸约为2~4um，板材微观组织均匀、晶粒细小，板材强度得到进一步提高。

The invention discloses a rapid preparation process for fine-crystalline molybdenum plates, which belongs to the technical field of powder metallurgy, and includes the following steps: (1) granulation; (2) pressing; (3) microwave sintering: in a microwave sintering furnace under vacuum conditions The green body is rapidly heated to 1500~1600℃ and kept for 10~40min to obtain a sintered molybdenum slab with a density greater than 95%; (4) Cross rolling: In a reducing atmosphere, the sintered molybdenum plate obtained in step (3) The billet is quickly heated to 1200~1400°C and kept for 20~40min, and the billet is cross-rolled, and then heated and rolled in 2~4 passes. The heating temperature is lowered by 40~60°C in each pass. The amount of deformation is 20-25%. After annealing, a molybdenum plate with fine and uniform grains is obtained. The invention uses nano powder combined with microwave sintering technology to densify the molybdenum powder, so that the sintered billet has fine grains, with an average grain size of 0.5-2um and a uniform microstructure; the grain size after cross rolling is about 2-4um , The microstructure of the plate is uniform, the crystal grain is fine, and the strength of the plate is further improved.