Verkkokauppa
SFS-EN ISO 4499-2:2020:en
Hardmetals. Metallographic determination of microstructure. Part 2: Measurement of WC grain size (ISO 4499-2:2020)
Soveltamisala
Suomenkielistä soveltamisalaa ei ole saatavissa.
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.
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
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.
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
Sisällysluettelo
Sidokset
Velvoittavat viittaukset
ISO 3369:2006 Impermeable sintered metal materials and hardmetals -- Determination of density
ISO 3738-1:1982 Hardmetals -- Rockwell hardness test (scale A) -- Part 1: Test method
ISO 3738-2:1988 Hardmetals -- Rockwell hardness test (scale A) -- Part 2: Preparation and calibration of standard test blocks
ISO 3738-1:1982 Hardmetals -- Rockwell hardness test (scale A) -- Part 1: Test method
ISO 3738-2:1988 Hardmetals -- Rockwell hardness test (scale A) -- Part 2: Preparation and calibration of standard test blocks
Tekninen komitea
Vahvistuspäivä
14.08.2020
Julkaisupäivä
18.08.2020
Painos
2
Sivumäärä
23
Julkaisun kieli
englanti