ISO 4499-2:2008通过使用光学或电子显微镜的金相技术测量硬质合金晶粒尺寸的指导方针。它适用于主要包含WC作为硬质相的WC/Co硬质合金（也称为硬质合金或金属陶瓷）。它也用于通过线性截距技术测量晶粒尺寸和分布。 ISO 4499-2:2008主要涵盖四个主题: 校准显微镜，支撑测量精度; 线性分析技术，以获得足够的统计意义上的数据; 分析方法，计算代表性平均值; 报告，符合现代质量要求。 ISO 4499-2:2008不适用于以下内容。 尺寸分布测量。 关于形状测量的建议。在给出形状测量建议之前，需要进一步的研究。 矫顽力的测量有时用于晶粒尺寸测量，但该电流指南仅涉及金相测量方法。它也用于烧结硬质合金，而不是表征粉末。然而，该方法原则上可用于测量适当安装和分段的粉末的平均尺寸

ISO 4499-2:2008 gives guidelines for the measurement of hardmetal grain size by metallographic techniques only using optical or electron microscopy. It is intended for sintered WC/Co hardmetals (also called cemented carbides or cermets) containing primarily WC as the hard phase. It is also intended for measuring the grain size and distribution by the linear-intercept technique. ISO 4499-2:2008 essentially covers four main topics: calibration of microscopes, to underpin the accuracy of measurements; linear analysis techniques, to acquire sufficient statistically meaningful data; analysis methods, to calculate representative average values; reporting, to comply with modern quality requirements. ISO 4499-2:2008 is not intended for the following. Measurements of size distribution. Recommendations on shape measurements. Further research is needed before recommendations for shape measurement can be given. Measurements of coercivity are sometimes used for grain-size measurement, but this current guide is concerned only with a metallographic measurement method. It is also written for sintered hardmetals and not for characterising powders. However, the method could, in principle, be used for measuring the average size of powders that are suitably mounted and sectioned.