1、February 2016 English price group 12No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 77.040.10!%LL/“2414112www.din.d
2、eDIN EN ISO 16859-2Metallic materials Leeb hardness test Part 2: Verification and calibration of the testing devices (ISO 16859-2:2015);English version EN ISO 16859-2:2015,English translation of DIN EN ISO 16859-2:2016-02Metallische Werkstoffe Hrteprfung nach Leeb Teil 2: berprfung und Kalibrierung
3、der Hrteprfgerte (ISO 16859-2:2015);Englische Fassung EN ISO 16859-2:2015,Englische bersetzung von DIN EN ISO 16859-2:2016-02Matriaux mtalliques Essai de duret Leeb Partie 2: Vrification et talonnage des appareils dessai (ISO 16859-2:2015);Version anglaise EN ISO 16859-2:2015,Traduction anglaise de
4、DIN EN ISO 16859-2:2016-02SupersedesDIN 50156-2:2007-07www.beuth.deDocument comprises 20 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.02.16 DIN EN ISO 16859-2:2016-02 2 A comma is used as the decimal marker. National forewor
5、d This document (EN ISO 16859-2:2015) has been prepared by Technical Committee ISO/TC 164 “Mechanical testing of metals”, Subcommittee SC 3 “Hardness testing” (Secretariat: DIN, Germany) in collaboration with Technical Committee ECISS/TC 101 “Test methods for steel (other than chemical analysis)” (S
6、ecretariat: AFNOR, France) in accordance with the agreement on technical cooperation between ISO and CEN (Vienna Agreement). The responsible German body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-01-41 AA H
7、rteprfung fr Metalle. DIN EN ISO 16859 consists of the following parts, under the general title Metallic materials Leeb hardness test: Part 1: Test method Part 2: Verification and calibration of testing devices Part 3: Calibration of reference test blocks The DIN Standards corresponding to the Inter
8、national Standards referred to in this document are as follows: ISO 16859-1 DIN EN ISO 16859-1 ISO 16859-3 DIN EN ISO 16859-3 Amendments This standard differs from DIN 50156-2:2007-07 as follows: a) the number of the standard has been changed; b) the specifications for the types of impact devices ar
9、e now more detailed; c) impact device type DC designed with shortened guide tube as a special device type D is no longer included; d) the specifications for calibration have been updated and rendered more precise; e) the procedures for calculating measurement uncertainties have been brought in line
10、with ISO/IEC Guide 98-3 (GUM); f) the standard has been editorially revised. Previous editions DIN 50156-2: 2007-07 DIN EN ISO 16859-2:2016-02 3 National Annex NA (informative) Bibliography DIN EN ISO 16859-1, Metallic materials Leeb hardness test Part 1: Test method DIN EN ISO 16859-3, Metallic mat
11、erials Leeb hardness test Part 3: Calibration of reference test blocks DIN EN ISO 16859-2:2016-02 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 16859-2 October 2015 ICS 77.040.10 English Version Metallic materials - Leeb hardness test - Part 2: Verificat
12、ion and calibration of the testing devices(ISO 16859-2:2015) Matriaux mtalliques - Essai de duret Leeb - Partie 2 :Vrification et talonnage des appareils dessai(ISO 16859-2:2015) Metallische Werkstoffe - Hrteprfung nach Leeb - Teil2:berprfung und Kalibrierung der Hrteprfgerte (ISO 16859-2:2015) This
13、 European Standard was approved by CEN on 10 July 2015. 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 bibliographical references
14、 concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre 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 CEN memb
15、er into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, Fra
16、nce, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES K
17、OMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 16859-2:2015 EForeword 41 Scope . 52 Normative references 53 General conditions . 54 Direct
18、 verification . 54.1 General . 54.2 Calibration parameters 64.3 Verification of mass and geometry of impact body . 74.4 Verification of geometry and hardness of indenter ball 74.5 Verification of geometry of support ring 74.6 Verification of impact velocity . 74.7 Indirect verification of instrument
19、 85 Indirect verification 85.1 General . 85.2 Procedure 85.3 Variation coefficient (V) 95.4 Error of test instrument 95.5 Measurement uncertainty 106 Intervals between verifications . 107 Verification report/calibration certificate . 11Annex A (informative) Measurement uncertainty of calibration res
20、ults of Leeb hardness testing instrument . 12Annex B (informative) Direct verification of single coil instrument 15Bibliography .16Contents PageDIN EN ISO 16859-2:2016-02 EN ISO 16859-2:2015 (E) 2European foreword 3European foreword This document (EN ISO 16859-2:2015) has been prepared by Technical
21、Committee ISO/TC 164 “Mechanical testing of metals” in collaboration with Technical Committee ECISS/TC 101 “Test methods for steel (other than chemical analysis)” the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication
22、 of an identical text or by endorsement, at the latest by April 2016, and conflicting national standards shall be withdrawn at the latest by April 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not
23、be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, E
24、stonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice T
25、he text of ISO 16859-2:2015 has been approved by CEN as EN ISO 16859-2:2015 without any modification. DIN EN ISO 16859-2:2016-02 EN ISO 16859-2:2015 (E) 3 ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The
26、work of preparing International 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-gover
27、nmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in
28、the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the pos
29、sibility 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. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list
30、of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as
31、 information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary Information The committee responsible for this document is ISO/TC 164, Mechanical testing of metals, Subcommittee SC 3, Hardness testing.ISO 16859 consists
32、 of the following parts, under the general title Metallic materials Leeb hardness test: Part 1: Test method Part 2: Verification and calibration of the testing devices Part 3: Calibration of reference test blocksDIN EN ISO 16859-2:2016-02 EN ISO 16859-2:2015 (E) 4 1 ScopeThis part of ISO 16859 speci
33、fies methods for direct and indirect verification of test instruments used for determining Leeb hardness in accordance with ISO 16859-1, and also describes when these two types of verification are to be performed.The direct verification involves checking that individual instrument performance parame
34、ters fall within specified limits, whereas the indirect verification utilizes hardness measurements of reference test blocks, calibrated in accordance with ISO 16859-3, to check the overall performance of the instrument for testing in the direction of gravity. The indirect method can be used on its
35、own for the periodic performance checking in service.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edi
36、tion of the referenced document (including any amendments) applies.ISO 16859-1, Metallic materials Leeb hardness test Part 1: Test methodISO 16859-3, Metallic materials Leeb hardness test Part 3: Calibration of reference test blocksISO 6507-1, Metallic materials Vickers hardness test Part 1: Test me
37、thod3 General conditionsBefore a Leeb hardness testing instrument is verified, the instrument shall be checked to ensure that it is properly set up and operating in accordance with the manufacturers instructions.Especially it should be checked thata) the impact body is correctly installed in the gui
38、de tube,b) the support ring is mounted tightly to the bottom of the impact device,c) cables are correctly connected, if applicable, andd) the settings of the indicating unit are correct.4 Direct verification4.1 General4.1.1 Direct verification should be carried out at a temperature of (23 5) C. If t
39、he verification is made outside this temperature range, this shall be reported in the verification report.4.1.2 The instruments used for verification shall be traceable to national measurement standards.DIN EN ISO 16859-2:2016-02 EN ISO 16859-2:2015 (E) 5 4.1.3 Direct verification is comprised of th
40、e following:a) verification of mass and geometry of impact body in accordance with 4.3;b) verification of geometry of indenter ball, and of hardness of ball except for type E, in accordance with 4.4;c) verification of geometry of support ring in accordance with 4.5;d) verification of impact velocity
41、 in accordance with 4.6.4.2 Calibration parametersCalibration parameters for reference in direct calibrations of Leeb impact devices are specified in Table 1.Table 1 Dimensions of Leeb impact devices for reference in direct calibrationsParameters of types of impact devicesD S E DL D+15 C GvAm/s Impa
42、ct velocitya2,05 0,1 2,05 0,1 2,05 0,1 1,82 0,1 1,7 0,1 1,4 0,1 3,0 0,1mm Maximum distance of ball indenter from test piece surface at velocity measurement2,00 2,00 2,00 2,00 2,00 2,00 3,00M g Mass of impact body (incl. ball indenter)5,45 0,15.40 0,15,45 0,17, 25 0,17,75 0,13,1 0,0520,0 0,3R mm Sphe
43、rical radius of indenter ball1,5 0,0051,5 0,0051,5 0,0051,39 0,0051,5 0,0051,5 0,0052,5 0,005Material of indentertungsten- carbide cobalt: balance; other carbides: 90 wt.-%; mass density 3,1 g/cm3 0,2 g/cm3polycrystal-line diamond Syndite; mass density 3,5 g/cm3 0,2 g/cm3tungsten- carbide cobalt: ba
44、lance; other carbides: 700DL, S850C, E750G600aHLD for impact devices D, HLD+15 for impact devices D+15, HLDL for impact devices DL, HLS for impact devices S, HLC for impact devices C, HLE for impact devices E, HLG for impact devices G.5.2 ProcedureThe reference test block shall be placed on a rigid
45、support. Make 10 indentations on each reference test block uniformly distributed over the test surface in the direction of gravity. Testing shall be done in accordance with ISO 16859-1.NOTE 1 For special applications, verification of the instrument can be limited to the hardness range corresponding
46、to the hardness of the test pieces.NOTE 2 Only the calibrated surface of the test blocks are to be used for testing.NOTE 3 For testing in directions other than in direction of gravity, the measured hardness number will be different. For such cases, the applicable correction method can be provided by
47、 the manufacturer.DIN EN ISO 16859-2:2016-02 EN ISO 16859-2:2015 (E) 8 5.3 Variation coefficient (V)VsHH=()100 in % (1)where s(H) is the standard deviation from n = 10 Leeb hardness readings:sHHn()()Hiin=211(2)The arithmetic mean value H from n = 10 measured Leeb hardness readings is calculated asHH
48、H Hn=+12.n(n = 10) (3)whereH1, H2, ., Hnare measured Leeb hardness readings;n is number of Leeb hardness readings.The variation coefficient shall be considered as sufficient when meeting the requirements from Table 3.5.4 Error of test instrumentThe error of the test instrumentE = HHCRM (4)whereHCRMis Leeb hardness of utilized reference test block.The perm
