BS EN ISO 4499-2:2010 PDF

1   Scope This part of ISO 4499 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. This part of ISO 4499 essentially covers four main topics:

— calibration of microscopes, to underpin the accuracy of measurements;

— linear analysis techniques, to acquire sufficient statistically meaningful data;

— an alysis methods, to calculate representative average values;

— reporting, to comply with modern quality requirements.

The part of ISO 4499 is supported by a measurement case study to illustrate the recommended techniques (see Annex  A ). The part of ISO 4499 is not intended for the following.

— Measurements of size distribution.

— Recommendations on shape measurements. Further research is needed before recommendations ...