以不同粒径及粒径搭配的钨粉为原料，钨粉通过冷等静压成形得到坯体，坯体在氢气气氛中进行烧结，烧结温度为1300-1500℃，保温时间为1-3小时。测试烧结样品的致密度。扫描和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。通过样品的SEM显微组织，统计样品的晶粒尺寸。

Tungsten powder with different particle size and particle size matching is used as raw material. The tungsten powder is formed by cold isostatic pressing to obtain the green body. The green body is sintered in hydrogen atmosphere. The sintering temperature is 1300-1500 ℃ and the holding time is 1-3 hours. The density of sintered samples was tested. Scanning and EBSD acquisition scheme: firstly, the sample surface is mechanically ground and polished, and then electropolished in a mixed solution of 25% perchloric acid and 75% alcohol with a voltage of 10 ± 2 V and a current of 45 ± 5 A for 120-300 s. It is measured by electron backscatter diffraction (EBSD) configured by EDAX. The scanning step is set to 0.05 °, and the scanning time is 30 min / sample. Through the SEM microstructure of the sample, the grain size of the sample was counted.