1、BSI Standards PublicationBS EN ISO 3326:2013Hardmetals Determinationof (the magnetization)coercivity (ISO 3326:2013)BS EN ISO 3326:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 3326:2013.It supersedes BS EN 23326:1993 which is withdrawn.The UK partici
2、pation in its preparation was entrusted to TechnicalCommittee ISE/65, Sintered metal components.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsib
3、le for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 77837 7ICS 77.040.99; 77.160Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStanda
4、rds Policy and Strategy Committee on 31 July 2013.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 3326 July 2013 ICS 77.160; 77.040.99 Supersedes EN 23326:1993English Version Hardmetals - Determination of (the magnetization) coercivity (I
5、SO 3326:2013) Mtaux-durs - Dtermination de la coercitivit (daimantation) (ISO 3326:2013) Hartmetalle - Ermittlung der Koerzitivfeldstrke (Magnetisierung) (ISO 3326:2013) This European Standard was approved by CEN on 22 June 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulati
6、ons which stipulate the conditions 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 CEN-CENELEC Management Centre or to any CEN member.
7、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 CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN m
8、embers are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Por
9、tugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by
10、any means reserved worldwide for CEN national Members. Ref. No. EN ISO 3326:2013: EBS EN ISO 3326:2013EN ISO 3326:2013 (E) 3 Foreword This document (EN ISO 3326:2013) has been prepared by Technical Committee ISO/TC 119 “Powder metallurgy“. This European Standard shall be given the status of a nation
11、al standard, either by publication of an identical text or by endorsement, at the latest by January 2014, and conflicting national standards shall be withdrawn at the latest by January 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
12、 rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 23326:1993. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Sta
13、ndard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, S
14、pain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 3326:2013 has been approved by CEN as EN ISO 3326:2013 without any modification. BS EN ISO 3326:2013ISO 3326:2013(E) ISO 2013 All rights reserved iiiContents PageForeword iv1 Scope . 12 Principle 13 Symbols
15、and designations 14 Apparatus . 25 Procedure. 26 Expression of results 27 Test report . 2BS EN ISO 3326:2013ISO 3326:2013(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International
16、 Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, a
17、lso take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committe
18、es is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possib
19、ility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 3326 was prepared by Technical Committee ISO/TC 119, Powder metallurgy, Subcommittee SC 4, Sampling and testing methods for hardme
20、tals.This second edition cancels and replaces the first edition (ISO 3326:1975), of which it constitutes a minor revision.iv ISO 2013 All rights reservedBS EN ISO 3326:2013INTERNATIONAL STANDARD ISO 3326:2013(E)Hardmetals Determination of (the magnetization) coercivity1 ScopeThis International Stand
21、ard specifies a method of determining (the magnetization) coercivity of hardmetals containing not less than 3 % of a ferromagnetic binder by mass.2 PrincipleMagnetization of a test piece in a d.c. magnetic field up to the state of technical saturation; determination of the coercivity HcMof reverse d
22、irection which is necessary for complete demagnetization of the test piece (M = 0).3 Symbols and designationsCoercivity HcM, in amperes per metre, as applied is the value of the reversed magnetic field required to reduce the intensity of magnetization in the test piece to zero (see Figure 1).Table 1
23、 Symbols and designationsSymbol Designation UnitH Magnetic field strength kA/mM Magnetization of the test piece kA/mMsMagnetization at the technical saturation kA/mHcM(Magnetization) coercivity kA/mFigure 1 Typical magnetic hysteresis loop of a ferromagnetic material ISO 2013 All rights reserved 1BS
24、 EN ISO 3326:2013ISO 3326:2013(E)4 ApparatusApparatus capable of the d.c. magnetization of the test piece up to the state of technical saturation in the d.c. magnetic field and providing its demagnitization.The apparatus shall have a precision of 0,2 kA/m for coercivity values up to 20 kA/m and 1 %
25、for values over 20 kA/m.In order to reach technical saturation, the value of the magnetic field strength shall be 200 to 400 kA/m depending on the type of apparatus used.5 Procedure5.1 Place the test piece in a d.c. magnetic field with its longest dimension in the direction of the field and magnetiz
26、e it up to technical saturation.5.2 Demagnetize the test piece in the d.c.magnetic field of reverse direction. The speed of demagnetization must be sufficiently low to give the precision specified in Clause 4.5.3 Determine the coercivity HcMnecessary for demagnetization of the test piece.6 Expressio
27、n of resultsThe result of the determination of coercivity HcMshall be rounded to the nearest 0,1 kA/m.7 Test reportThe test report shall include the following information:a) a reference to this International Standard;b) all details necessary for identification of the test sample;c) the result obtain
28、ed;d) all operations not specified in this International Standard, or regarded as optional;e) details of any occurrence which may have affected the result.2 ISO 2013 All rights reservedBS EN ISO 3326:2013This page deliberately left blankThis page deliberately left blankBSI is the national body respo
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