采用不同平均锻造比及锻造方式对烧结纯钨棒进行锻造拔长，并在不同退火制度下对锻造后钨棒进行退火，利用金相显微镜对试样微观组织进行分析。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×进行组织观察。

The sintered pure tungsten rods are forged and drawn with different average forging ratios and forging methods, and the forged tungsten rods are annealed under different annealing systems, and the microstructure of the sample is analyzed by metallographic microscope. Metallographic structure collection plan: 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 for organization observation.