1、BRITISH STANDARD BS EN 24884:1993 ISO 4884:1978 Hardmetals Sampling and testing of powders using sintered test pieces The European Standard EN24884:1993 has the status of a British Standard UDC 669.018.25-492.2:620.11BSEN24884:1993 This British Standard, having been prepared under the directionof th
2、e Iron and Steel Standards Policy Committee, waspublished under the authorityof the Standards Boardand comes into effect on 15June1993 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ISM/65 Special announcement in BSINews January1993 ISBN 0 580 21933
3、 X Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation De
4、nmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of Irela
5、nd Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Standardiseringsko
6、mmissionen i Sverige Switzerland Association suisse de normalisation UnitedKingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBSEN24884:1993 BSI 01-2000 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 1 Scope a
7、nd field of application 3 2 References 3 3 Definitions 3 4 Sampling 3 5 Preparation of test pieces 3 6 Testing 3 Annex ZA (normative) Normative references to international publications with their relevant European publications 4 National annex NA (informative) Committees responsible Inside back cove
8、r National annex NB (informative) Cross-references Inside back coverBSEN24884:1993 ii BSI 01-2000 National foreword This British Standard has been prepared under the direction of the Iron and Steel Standards Policy Committee and is the English language version ofEN24884:1993 Hardmetals Sampling and
9、testing of powders using sintered test pieces, published by the European Committee for Standardization (CEN). It is identical withISO4884:1978, prepared by Technical Committee119, Powder metallurgy, of the International Organization for Standardization (ISO) with the active participation of the UK.
10、This British Standard supersedesBS5600-2.10:1980, which is withdrawn and from which it differs by the addition ofAnnex ZA. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance w
11、ith a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 4, an inside back cover and a back cover. This standard has been updated (see copyright date)
12、and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN24884 April 1993 UDC 669.018.25-492.2:620.11 Descriptors: Powder metallurgy, hard metals, sampling, specimen, preparation, sintered pr
13、oducts, tests English version Hardmetals Sampling and testing of powders using sintered test pieces (ISO 4884:1978) Mtaux-durs Echantillonnage et essais des poudres au moyen dprouvettes frittes (ISO4884:1978) Hartmetalle Probenahme und Prfung von Pulvern unter Verwendung von gesinterten Probekrpern
14、(ISO4884:1978) This European Standard was approved by CEN on1993-04-02. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliograp
15、hical 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 official versions (English, French, German). A version in any other language made by translation under the responsibility of a CE
16、N 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, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain
17、, Sweden, Switzerland and UnitedKingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1993 Copyright reserved to CEN members Ref. No. EN 24884:1993 EEN24884:1993 BSI 01-2000 2 Forewor
18、d In 1992,ISO4884:1978 Hardmetals Sampling and testing of powders using sintered test pieces was submitted to the CEN Primary Questionnaire procedure. Following the positive result of the CEN/CS ProposalISO4884:1978 was submitted to the CEN Formal Vote. The result of the Formal Vote was positive. Th
19、is European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest byOctober1993, and conflicting national standards shall be withdrawn at the latest byOctober1993. According to Internal Regulations of CEN/CENELEC, the f
20、ollowing countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom.EN24884:1993 BSI 01-2000 3 1 Scope and field of application
21、This International Standard relates to the sampling and testing of powder mixtures for the manufacture of hardmetals, using sintered test pieces, and to the preparation of test pieces. 2 References ISO 3326, Hardmetals Determination of (the magnetization) coercivity. ISO 3327, Hardmetals Determinati
22、on of transverse rupture strength. ISO 3369, Impermeable sintered metal materials and hardmetals Determination of density. ISO 3738, Hardmetals Rockwell hardness test (scale A). ISO 3878, Hardmetals Vickers hardness test. ISO 3954, Powder for powder metallurgical purposes Sampling. ISO 4499, Hardmet
23、als Metallographic determination of microstructure. ISO 4505, Hardmetals Metallographic determination of porosity and uncombined carbon. 3 Definitions For terms and definitions, seeISO3954. 4 Sampling 4.1 Sampling from a lot shall be carried out in conformity withISO3954. 4.2 In the event that a bat
24、ch is blended into one lot in one blender as the last operation before separation into containers, then by agreement between producer and consumer one or more test samples may be taken from the blender. 5 Preparation of test pieces 5.1 The test pieces shall be processed from the test sample in confo
25、rmity with their grade and dimensions. All the test pieces for each type of testing shall be sintered simultaneously under the same conditions and in the same furnace. 5.2 To ensure that the properties of the test pieces prepared from the lot of powder are significant, the appropriate manufacturing
26、conditions shall be used in the production of the test pieces. 5.3 The dimensions of the test pieces shall comply with the requirements of the relevant International Standards. For the determination of porosity, one or more test pieces shall be sectioned to enable a total area of not less than1cm 2t
27、o be examined. 6 Testing Tests usually carried out on sintered test pieces from a lot of powder are given in the following table. NOTE 1The determination of the properties listed in the table may be carried out on the same test pieces but the determination of hardness, microstructure and porosity sh
28、all not be carried out before the determination of transverse rupture strength. NOTE 2Because of the high scatter given by the transverse rupture test, its value is limited when testing an individual lot of powder. NOTE 3Chemical analysis may be carried out on a test sample taken from the powder lot
29、 or on a sintered test piece. Type of testing International Standard Determination of coercivity ISO 3326 Determination of transverse rupture strength ISO 3327 Determination of density ISO 3369 Determination of hardness HRA ISO 3738 Determination of hardness HV ISO 3878 Determination of microstructu
30、re ISO 4499 Determination of porosity and uncombined carbon ISO 4505EN24884:1993 4 BSI 01-2000 Annex ZA (normative) Normative references to international publications with their relevant European publications This European Standard incorporates by dated or undated reference, provisions from other pu
31、blications. 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 amendment or revi
32、sion. For undated references the latest edition of the publication referred to applies (including amendments). Publication Year Title EN/HD Year ISO 3326 1975 Hardmetals Determination of (the magnetization) coercivity EN 23326 1993 ISO 3327 1982 Hardmetals Determination of transverse rupture strengt
33、h EN 23327 1993 ISO 3369 1975 Impermeable sintered metal materials and hardmetals Determination of density EN 23369 1993 ISO 3738 1986/88 Hardmetals Rockwell hardness test (scale A) ISO 3878 1983 Hardmetals Vickers hardness test EN 23878 1993 ISO 3954 1977 Powders for powder metallurgical purposes S
34、ampling EN 23954 1993 ISO 4499 1978 Hardmetals Metallographic determination of microstructure EN 24499 1993 ISO 4505 1978 Hardmetals Metallographic determination of porosity anduncombined carbone EN 24505 1993BSEN24884:1993 BSI 01-2000 National annex NA (informative) Committees responsible The Unite
35、dKingdom participation in the preparation of this European Standard was entrusted by the Iron and Steel Standards Policy Committee (ISM/-) to Technical Committee ISM/65, upon which the following bodies were represented: British Hardmetal Association Federation of British Engineers (Test Manufacturer
36、s) Society of Motor Manufacturers and Traders Limited Coopted member National annex NB (informative) Cross-references Publication referred to Corresponding British Standard EN 23326:1993 ISO 3326:1975 BS EN 23326:1993 Hardmetals Determination of (the magnetization) coercivity EN 23327:1993 ISO 3327:
37、1982 BS EN 23327:1993 Hardmetals Determination of transverse rupture strength EN 23369:1993 ISO 3369:1975 BS EN 23369:1993 Impermeable sintered metal materials and hardmetals EN 23878:1993 ISO 3878:1983 BS EN 23878:1993 Hardmetals Vickers hardness test EN 23954:1993 ISO 3954:1977 BS EN 23954:1993 Po
38、wders for powder metallurgical purposes Sampling EN 24499:1993 ISO 4499:1978 BS EN 24499:1993 Hardmetals Metallographic determination of microstructure EN 24505:1993 ISO 4505:1978 BS EN 24505:1993 Hardmetals Metallographic determination of porosity and uncombined carbon BS EN 24884:1993 ISO 4884:197
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