Evaluation method for grain size of tungsten carbide powder and tungsten carbide powder

The invention provides a tungsten carbide powder grain size evaluation method and tungsten carbide powder.The evaluation method comprises the following steps that 1, grain size data of tungsten carbide powder are obtained based on a Fisher particle size method and EBSD analysis, and the effective grain size Dmgs is calculated; (2) the Fisher particle size FSSS and the effective grain size Dmgs of the tungsten carbide powder are combined, and the grain size of the tungsten carbide powder is evaluated; in the effective grain size formula, according to the evaluation method provided by the invention, weighted average processing is carried out on grain size data obtained through EBSD analysis, coefficient correction is carried out according to tungsten carbide powder samples with different Fisher particle sizes, and accurate characterization and evaluation on microstructure performance differences of tungsten carbide powder with different sources are realized. 本发明提供一种碳化钨粉末晶粒度的评价方法及碳化钨粉末，所述评价方法包括以下步骤：(1)基于费氏粒度法和EB