X射线管转轴的高性能钼棒制备是钼材加工中的一个难点，研究选用适宜的钼粉，制定合理烧结工艺，采用特殊的锻造工艺，生产出性能指标达到美国ASTM387-90标准的钼棒。结果表明：采用平均粒度2.2μm，松装密度1.14 g/cm3的钼粉压制后在氢气感应炉中1920℃烧结3 h后，再采用加热1200~1400℃，道次加工率24%~2%，总加工率74%，5次模锻的锻造工艺能获得密度为10.2 g/cm3的钼棒，再经900℃保温半小时的消应力退火，可以得到抗拉强度大于620 MPa，延伸率大于30%，组织结构均匀的高性能钼棒。%Preparation of high-performance X-ray tube molybdenum rod shaft is one of the difficult points of molybdenum processing. Molybdenum rod shaft, whose performance properties conform to US standards ASTM387-90, is produced by sintering and forging processes. Molybdenum powder(average particle size=2.2μm, bulk density=1.14 g/cm3 ) is sintered at 1 920℃for 3 hours in Hydrogen induction furnace. Molybdenum rod (density=10.2 g/cm3) is obtained upon 1200~1400℃heating and 5 times of forging (pass processing rate=24%~2%, total processing rate=74%). High performance molybdenum rod with uniform organizational structure (tensile strength greater than 620MPa, elongation more than 30%) is produced upon Eliminate stress annealing at 900℃for 30 mins.
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