ISO 4499-2:2008 硬质合金 显微组织的金相测定 第2部分：碳化钨晶粒度的测量

标准编号：ISO 4499-2:2008

中文名称：硬质合金 显微组织的金相测定 第2部分：碳化钨晶粒度的测量

英文名称：Hardmetals — Metallographic determination of microstructure — Part 2: Measurement of WC grain size

发布日期：2008-09

标准范围

ISO 4499-2:20 08给出了仅使用光学或电子显微镜通过金相技术测量硬质合金晶粒尺寸的指南。它用于主要含有WC作为硬相的烧结WC/Co硬质合金（也称为硬质合金或金属陶瓷）。它还用于通过线性截距技术测量晶粒尺寸和分布。ISO 4499-2:20 08基本上涵盖四个主要主题:显微镜的校准，以支持测量的准确性；线性分析技术，以获取足够的具有统计意义的数据；分析方法，计算代表性平均值；报告，以符合现代质量要求。ISO 4499-2:20 08不适用于以下情况。尺寸分布的测量。形状测量建议。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，但本指南仅涉及金相测量方法。它也适用于烧结硬质合金，而不是用于表征粉末。然而，该方法原则上可用于测量适当安装和切片的粉末的平均尺寸。

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.

标准预览图