1、CEN ENx24487 93 M 3404587 0047048 TBT M EUROPEAN STANDARD EN 24489 NORME EUROPENNE EUROPISCHE NORM April 1993 UDC 621.762.5 : 669-492.2 : 620.1 Descripton: Powder metallurgy, hard metals, sintered products, sampling, tests, standards lists English version Sintered hardmetals - Sampling and testing (
2、IS0 4489 : 1978) Mtaux-durs fritts - Echantillonnage et essais Prfung (IS0 4489 : 1978) Sinterhartmetalle - Probenahme und (IS0 4489 : 1978) This European Standard was approved by CEN on 1993-04-02. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditio
3、ns for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three off
4、icial versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria,
5、 Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de
6、 Stassart 36, B-1050 Brussels O 1993 Copyright reserved to CEN members Ref. No. EN 24489 : 1993 E CEN EN+24489 93 3404589 0047049 9Lb ?age 2 EN 24489 : 1993 Foreword In 1992, IS0 4489 : 1978 Sintered hardmdals - Sampling and testing was submitted to the CEN Primary Questionnaire procedure. Following
7、 the positive result of the CENICS Proposal IS0 4489 : 1978 was submitted to the Formal Vote. The result of the Formal Vote was positive. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 19
8、93, and conflicting national standards shall be withdrawn at the latest by October 1993. According to the Internal Regulations of CENICENELEC, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
9、Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Swtizerland and United Kingdom. NOTE. The European references to international publications are given in annex ZA (normative). CEN EN*24489 93 3404589 0047050 638 = Determination of microstructure SCOPE AND FIELD OF APPLICATION IS0 4499 This
10、International Standard relates to the sampling and testing of sintered hardmetals for determination of their physical and mechanical properties. 2 REFERENCES IS0 3326, Hardmetals - Determination of (the magnet- ization) coercivity. IS0 3369, impermeable sintered metal materials and hard- metals - De
11、termination of density. IS0 3738, hardmetals - Rockwell hardness test (scale Al. IS0 3878, Hardmetals - Vickers hardness test. IS0 4499, Hardmetals - Metallographic determination of microstructure. 1 ) IS0 4505. Hardmetals - Metallographic determination of porosity and uncombined carbon. ) 3 DEFINIT
12、IONS 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 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 ap
13、plications. Also, the determination of physical and mechanical properties is time consuming and sometimes of a destructive nature. It is therefore neither desirable nor practical to employ a sample quantity comparable with that normally employed for checking dimensional features. The degree of consi
14、stency of a lot can therefore only be determined economically in Page 3 EN 24489 : 1993 the course of production control. For confirmation of the grade of hardmetal, it 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 giv
15、en in table 1. TABLE 1 Determination of coercivity Determination of density Determination of hardness HRA Determination of hardness HV International Standard IS0 3326 IS0 3369 IS0 3738 ISO wa 5.2 Tests which may be carried out in special cases are given in table 2. TABLE 2 I i Typ. of tosting I Into
16、rnational I Standard I IS0 4505 I Determination of porosity and uncombined 6 TESTREPORT Sintered products are frequently ordered in small quantities and taken from stock. Therefore, the identity of the lot cannot be retained and it must not be expected that a test report can be supplied with individ
17、ual orders. 1) Atesent at the stage of draft. CEN EN+24489 93 3404589 O047053 574 Page 4 EN 24489 : 1993 Annex ZA (normative) Normative references to international publications with their relevant European publications This European Standard incorporates by dated or undated reference, provisions fro
18、m other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendme
19、nt or revision. For undated references the latest edition of the publication referred to applies (including amendments). Publication Title E“D - Year IS0 3326 Hardmetals - Determination of (the magnet- EN 23326 zation) coercivity IS0 3369 Impermeable sintered metal materials and EN 23369 hardmetals
20、- Determination of density IS0 3738 Hardmetals - Rockwell hardness test (scale A) - IS0 3878 Hardmetals - Vickers hardness test EN 23878 IS0 4499 Hardmetals - Metallographic determination of EN 24499 microstructure IS0 4505 Hardmetals - Metallographic determination of EN 24505 porosity and uncombined carbone
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