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Reference | EN ISO 4499-2:2020 |
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Title | Hardmetals - Metallographic determination of microstructure - Part 2: Measurement of WC grain size (ISO 4499-2:2020) |
Work Item Number | CSM11108 |
Abstract/Scope | 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]) 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 Annex A). 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. [1] DE: Wolframcarbid, EN: tungsten carbide. |
Status |
Published
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Reference Document |
ISO 4499-2:2020 (EQV)
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date of Availability (DAV) | 2020-08-05 |
ICS | 77.040.99 - Other methods of testing of metals 77.160 - Powder metallurgy |
A-Deviation(s) | |
Special National Condition(s) |
Directive(s) | |
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Mandate(s) | |
Citation in OJEU |
date of Ratification (DOR) (1) | 2020-08-01 |
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date of Availability (DAV) (2) | 2020-08-05 |
date of Announcement (DOA) (3) | 2020-11-30 |
date of Publication (DOP) (4) | 2021-02-28 |
date of Withdrawal (DOW) (5) | 2021-02-28 |
Supersedes | EN ISO 4499-2:2010 |
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Superseded by | |
Normative reference (6) |
ISO 3369
ISO 3738-1 ISO 3738-2 ISO 4489:2019
ISO 6507-1
ISO 6507-2 ISO 6507-3 ISO 6507-4 |
Sales Points |
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(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved
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