采用纯度为99.95%的钼粉分别压制、烧结出钼板坯，烧结钼板坯经1400℃加热后，经多道次热轧至最终厚度，实际热轧变形量为66%。将热轧后的钼板分别在900℃、1000℃、1100℃和1200℃退火1h，然后进行金相组织观察和EBSD分析。金相组织采集方案：试样经过机械磨削和抛光成平整、光亮、无磨痕或抛光划痕的镜面，采用10-20%的氢氧化钠+铁氰化钾混合液（氢氧化钠与铁氰化钾质量比为1:1）对样品进行腐蚀，腐蚀后的样品在金相显微镜下放大100×或200×进行金相组织观察。EBSD采集方案：首先对样品表面进行机械研磨和抛光，然后在25%高氯酸和75％的酒精混合溶液中，以10±2 V的电压和45±5 A的电流进行电解抛光，持续时间为120-300 s。通过EDAX配置的电子背散射衍射（EBSD）进行测量，扫描步长设为0.05°，扫描时间为30 min/样。

Molybdenum slabs are separately pressed and sintered with molybdenum powder with a purity of 99.95%. After sintered molybdenum slabs are heated at 1400°C, they are hot-rolled to the final thickness through multiple passes. The actual hot-rolling deformation is 66%. The hot-rolled molybdenum plates were annealed at 900℃, 1000℃, 1100℃ and 1200℃ for 1h, and then the metallographic structure observation and EBSD analysis were carried out. Metallographic structure collection scheme: The sample is mechanically ground and polished into a smooth, bright, and non-abrasive or polished mirror surface, using a 10-20% sodium hydroxide + potassium ferricyanide mixture (sodium hydroxide and potassium ferricyanide) The mass ratio of potassium ferricyanide is 1:1) The sample is corroded, and the corroded sample is magnified 100× or 200× under a metallurgical microscope to observe the metallographic structure. EBSD collection scheme: first mechanically grinding and polishing the surface of the sample, and then electropolishing in a 25% perchloric acid and 75% alcohol mixed solution with a voltage of 10 ± 2 V and a current of 45 ± 5 A, duration Is 120-300 s. The measurement is carried out by electron backscatter diffraction (EBSD) configured by EDAX, the scanning step is set to 0.05°, and the scanning time is 30 min/sample.