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BS EN ISO 4499-2:2020

Current
Current

The latest, up-to-date edition.

Hardmetals. Metallographic determination of microstructure Measurement of WC grain size
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

12-08-2020

This document gives guidelines for the measurement of hardmetal grain size by metallographic techniques only using optical or electron microscopy.

This document gives guidelines for the measurement of hardmetal grain size by metallographic techniques only using optical or electron microscopy. It is intended for WC/Co hardmetals (also called cemented carbides or cermets) containing primarily tungsten carbide (WC 1 1 DE: Wolframcarbid, EN: tungsten carbide.) as the hard phase. It is also intended for measuring the grain size and distribution by the linear-intercept technique.

This document 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. This document is supported by a measurement case study to illustrate the recommended techniques (see AnnexA).This document 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, however, this document is concerned only with a metallographic measurement method. It is also written for hardmetals and not for characterizing powders. However, the method can, in principle, be used for measuring the average size of powders that are suitably mounted and sectioned.

Committee
W/-
DocumentType
Standard
ISBN
9780580521355
Pages
24
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
ISO 4499-2:2020 Identical
EN ISO 4499-2:2020 Identical
EN ISO 4499-2:2010 Identical

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