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1、INTERNATIONAL STANDARD 4489 INTERNATIONAL ORGANIZATION FOR STANDARDlZATIONWlEWlYHAPOjlHAR OPTAHMSALIMR fl0 CTAHI1APTH3AUMM.ORGANISATION INTERNATIONALE DE NORMALISATION Sintered hardmetals - Sampling and testing M i% Descriptors : hardmetals, sintered products, sampling, tests. $ 0 !? Price based on
2、1 page Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 09:37:38 MDTNo reproduction or networking permitted without license from IHS -,-,- FOREWORD IS0 (the International Organiza
3、tion for Standardization) is a worldwide federation of national standards institutes (IS0 member bodies). The work of developing International Standards is carried out through IS0 technical committees. Every member body interested in a subject for which a technical committee has been set up has the
4、right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as In
5、ternational Standards by the IS0 Council. International Standard IS0 4489 was developed by Technical Committee ISO/TC 119, Powder metallurgical materials and products, and was circulated to the member bodies in April 1977. It has been approved by the member bodies of the following countries : Austra
6、lia Italy Austria Japan Bulgaria Mexico Canada Poland Chile Portugal Czechoslovakia Romania France South Africa Rep. of Germany Spain Sweden Turkey United Kingdom U.S.A. U.S.S.R. Yugoslavia The member body of the following country expressed disapproval of the document on technical grounds : Ireland
7、Q International Organization for Standardization, 1978 l Printed in Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 09:37:38 MDTNo reproduction or networking permitte
8、d without license from IHS -,-,- INTERNATIONAL STANDARD IS0 4489-1978 (E) Sintered hardmetals - Sampling and testing 1 SCOPE AND FIELD OF APPLICATION This international Standard relates to the sampling and testing of sintered hardmetals for determination of their physical and mechanical properties.
9、2 REFERENCES IS0 3326, Hardmetals - Determination of (the magnet- ization) coercivity. IS0 3369, Impermeable sintered metal materials and hard- metals - Determination of density. IS0 3738, Hardmetals - Rockwell hardness test (scale A). IS0 3878, Hardmetals - Vickers hardness test. IS0 4499, Hardmeta
10、ls - Metallographic determination of microstructure. ) IS0 4505, Hardmetals - Metallographic determination of porosity and uncombined carbon. ) 3 DEFINITIONS 3.1 lot : A defined quantity of presumably uniform sintered parts of a single type, size and grade. 3.2 test sample : One or more units taken
11、from a lot for the determination of properties. 4 SAMPLING Hardmetal parts are supplied in a wide range of sizes and quantities and for a wide range of applications. Also, the determination of physical and mechanical properties is time consuming and sometimes of a destructive nature. It is therefore
12、 neither desirable nor practical to employ a sample quantity comparable with that normally employed for checking dimensional features. The degree of consistency of a lot can therefore only be determined economically in the course of production control. For confirmation of the grade of hardmetal, it
13、is usually sufficient to take a test sample of one unit. 5 TESTING 5.1 Tests which are usually carried out on a test sample are given in table I. TABLE 1 Type of testing international Standard Determination of coercivity IS0 3326 Determination of density IS0 3369 Determination of hardness HRA I SO 3
14、738 Determination of hardness HV I SO 3878 5.2 Tests which may be carried out in special cases are given in table 2. TABLE 2 Type of testing / In;zy;yal 1 Determination of microstructure 6 TEST REPORT Sintered products are frequently ordered in small quantities and taken from stock. Therefore, the i
15、dentity of the lot cannot be retained and it must not be expected that a test report can be supplied with individual orders. I) At present at the stage of draft 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 09:37:38 MDTNo reproduction or networking permitted without license from IHS -,-,-