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  • BSI
    BS EN ISO 4499-2:2020 Hardmetals. Metallographic determination of microstructure - Measurement of WC grain size
    Edition: 2020
    $435.35
    / user per year

Description of BS EN ISO 4499-2:2020 2020

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:

  1. calibration of microscopes, to underpin the accuracy of measurements;

  2. linear analysis techniques, to acquire sufficient statistically meaningful data;

  3. analysis methods, to calculate representative average values;

  4. reporting, to comply with modern quality requirements.

This document is supported by a measurement case study to illustrate the recommended techniques (see Annex A).

This document is not intended for the following:

  1. measurements of size distribution;

  2. 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.



Standard NumberBS EN ISO 4499-2:2020
TitleHardmetals. Metallographic determination of microstructure - Measurement of WC grain size
StatusDefinitive
Publication Date2020-08-12
ReplacesBS EN ISO 4499-2:2010
Identical National Standard OfEN ISO 4499-2, ISO 4499-2
DescriptorsSpecimen preparation, Powder metallurgy, Microscopic analysis, Testing conditions, Carbides, Crystal microstructure, Metals, Grain size, Metallography, Test specimens, Hardmetals, Alloys, Etching
ICS77.040.99 Other methods of testing of metals, 77.160 Powder metallurgy
CommitteeW/-
ISBN978 0 580 52135 5
PublisherBSI
Pages24

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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