从厦门虹鹭钨业有限公司提供的氢气炉烧结纯钨坯料中切取尺寸为φ8×12 mm的试样，表面打磨光亮，然后进行热物理模拟轧制实验。在Gleeble-3800热物理模拟机实验平台，进行1300-1500℃温度、0.1-0.0001s^-1应变速率、30%和60%变形量的等温热压缩实验。从热物理模拟轧制样品中切取6*10*3mm尺寸的样品，进行金相样品制样和表面Ar离子刻蚀。然后，对氩离子刻蚀样品进行电子背散射衍射（EBSD）测试，测试步长取0.5μm。采集到样品内部晶粒尺寸的分布和晶界特征。借助Origin软件绘制出晶粒尺寸和晶界特征的分布曲线，给出平均晶粒尺寸数值。

A sample with a size of φ8×12 mm was cut from a pure tungsten blank sintered in a hydrogen furnace provided by Xiamen Honglu Tungsten Industry Co., Ltd., the surface was polished and bright, and then a thermophysical simulation rolling experiment was carried out. On the experimental platform of the Gleeble-3800 thermal physics simulator, isothermal thermal compression experiments with a temperature of 1300-1500°C, a strain rate of 0.1-0.0001s-1, and a deformation amount of 30% and 60% were carried out. A sample with a size of 6*10*3mm was cut from the thermal physical simulation rolling sample, and the metallographic sample preparation and the surface Ar ion etching were performed. Then, the electron backscatter diffraction (EBSD) test was performed on the argon ion etched sample, and the test step size was 0.5 μm. The distribution of grain size and grain boundary characteristics inside the sample are collected. With the aid of Origin software, the distribution curve of grain size and grain boundary characteristics is drawn, and the average grain size value is given.