ISO INTERNATIONAL STANDARD 4499-4 Firstedition 2016-02-15 Hardmetals Metallographic determination of microstructure Part 4: Characterisation of porosity, carbon defects and eta-phase content Metaux-durs-Détermination métallographique de la microstructure- Partie 4: Caracterisation de la porosité, des defauts carbone et de la teneur en phase eta Reference number IS04499-4:2016(E) ISO Intermational Organization for Standardization @IS02016 JIANG INST OF STANDARDIZATION C15956617 d without license from IHS IS04499-4:2016(E) COPYRIGHTPROTECTEDDOCUMENT IS02016,Published inSwitzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8. CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +4122 749 09 47 [email protected] www.iso.org Intemationaibr PrganizationforStandardization Uicensee-ZHEJIANG INSTOF STANDARDIZoISQ,6-All rights reserved etworking permitted without license from IHS NotforResale, 2016/4/2602:07:55 IS0 4499-4:2016(E) Contents Page Foreword ..iv Introduction.. 1 Scope.. 2 Normative references 3 Terms and definitions ..1 4 Symbols and Units ..1 5 Principle. .2 6 Apparatus. ..2 7 Calibration ofmeasurement apparatus .2 8 Preparation oftestsamples .2 .2 8.1 Methods of preparation. 8.2 Characterisation ofporosityand carbon (graphite)defects .3 8.3 Characterisation of eta-phase .3 9 Procedure .3 9.1 General .3 9.2 Determination of porosity. .3 9.3 Determination of carbon defects .4 9.4 Determination ofthen-phase (eta-phase) .7 10 Uncertainty of measurement .9 11 Test report .9 Bibliography .10 iii See=ZHEJIANG INSTOFSTANDARDIZATIONC15956617 thout license from IHS