1、February 2015Translation by DIN-Sprachendienst.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).IC
2、S 19.060; 77.040.10!%:“2292398www.din.deDDIN EN ISO 6506-2Metallic materials Brinell hardness test Part 2: Verification and calibration of testing machines(ISO 6506-2:2014);English version EN ISO 6506-2:2014,English translation of DIN EN ISO 6506-2:2015-02Metallische Werkstoffe Hrteprfung nach Brine
3、ll Teil 2: berprfung und Kalibrierung der Prfmaschinen (ISO 6506-2:2014);Englische Fassung EN ISO 6506-2:2014,Englische bersetzung von DIN EN ISO 6506-2:2015-02Matriaux mtalliques Essai de duret Brinell Partie 2: Vrification et talonnage des machines dessai (ISO 6506-2:2014);Version anglaise EN ISO
4、6506-2:2014,Traduction anglaise de DIN EN ISO 6506-2:2015-02SupersedesDIN EN ISO 6506-2:2006-03www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 24 pages01.15 DIN EN ISO 6506-2:2015-02 2 A comma is used as the decimal marker. National for
5、eword This document (EN ISO 6506-2:2014) 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)”
6、 (Secretariat: 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 the DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-01-
7、41 AA Hrteprfung fr Metalle. DIN EN ISO 6506 consists of the following parts, under the general title Metallic materials Brinell hardness test: Part 1: Test method Part 2: Verification and calibration of testing machines Part 3: Calibration of reference blocks Part 4: Table of hardness values The DI
8、N Standards corresponding to the International Standards referred to in this document are as follows: ISO 376 DIN EN ISO 376 ISO 6506-1 DIN EN ISO 6506-1 ISO 6506-3 DIN EN ISO 6506-3 ISO 6507-1 DIN EN ISO 6507-1 Amendments This standard differs from DIN EN ISO 6506-2:2006-03 as follows: a) the Intro
9、duction has been deleted; b) in Subclause 4.4.1, the calibration of the length measuring system has been defined in more detail; c) in Subclause 4.4.3, calibration of the length by means of reference indentations has been added; d) in Subclause 5.9, Tables 2 and 3 concerning repeatability and error
10、of the testing machine have been divided up to include different force-diameter indices and hardness ranges; e) in Annex A, the determination of the uncertainty of measurement and some formulae have been modified; f) Annex B “Verification of hardness testing machines that are incapable of meeting th
11、e specified force/time profile” has been added; g) the standard has been editorially revised. Previous editions DIN 51225: 1957-09 DIN 51225-1: 1976-10, 1985-01 DIN 51225-2: 1985-10 DIN 51305: 1983-09 DIN EN 10003-2: 1995-01 DIN EN 10003-2 Supplement 1: 1995-01 DIN EN ISO 6506-2: 1999-10, 2006-03 DI
12、N EN ISO 6506-2 Supplement 1: 1999-10 DIN EN ISO 6506-2:2015-02 3 National Annex NA (informative) Recommendations for the verification and design of testing machines and indenters 1 NA.1 Design of testing machine and indenter Figure NA.1 shows dimensions for the throat depth and vertical capacity of
13、 the testing machine, and figure NA.2 shows a recommended indenter design, both of which were included in DIN 51225-1:1995-01 but which are no longer included here. Working Committee NA 062-01-41 AA Hrteprfung fr Metalle recommends these dimensions and design features to ensure fitting of the force-
14、proving instrument needed for direct verification of the test force. 2 NA.2 Verification of indenter The overall conformity of the indenter should be verified by an accredited calibration laboratory and the relevant test mark applied to the holder. At the installation site of the testing machine, a
15、check should be made as to whether there is proof of con-formity of the indenter geometry. In addition, a visual check using a magnifying glass having at least a 10 null magnification is to be made to see if the indenter surface has any defects or deposits. Since, with use, there are changes to the
16、indenter which cannot be identified by means of a magnifying glass, but which have an effect on measurement results, the indenter should be changed at least every two years. In addition, the condition of the indenter can be controlled by making indentations on a reference block of low hardness, star
17、ting with the lowest test force and then making indentations at each test force, checking the indentations for irregularities by means of optical measurement. 3 NA.3 Intervals between verifications Since 1959 the national standard DIN 51220 has specified that definitive tests may only be carried out
18、 using a testing machine that has been verified and calibrated according to the relevant standards. Verification was to be performed before the machine was commissioned, after each re-installation, conversion or retrofitting, and at least once a year; both indirect and direct verification were to be
19、 carried out. Experience had shown that this is necessary because indirect verification is carried out on reference blocks to determine the machine error, while with direct verification, it can be established whether or not the various errors cancel each other out, and particularly whether there is
20、friction in the force application system of the machine. According to Clause 6 of this European Standard, direct verification does not need to be carried out each year if the requirements of Table 3 are met. However, on the basis of the long-term experience of testing houses in Germany, NA 062-01-41
21、 AA Hrte-prfung fr Metalle recommends that direct verification continue to be carried out yearly, to ensure the correctness of test results, thus maintaining the accustomed comparability of results obtained with different machines using the same method and under the same conditions. DIN EN ISO 6506-
22、2:2015-02 4 Key aThroat depth, 120 mmbVertical capacity, 200 mm Figure NA.1 Throat depth and vertical capacity Key 1 Shoulder face 4 Shank 2 Shoulder face 5 Indenter 3 Shoulder 6 Holder Figure NA.2 Recommended design of indenter and holder DIN EN ISO 6506-2:2015-02 5 National Annex NB (informative)
23、Bibliography DIN EN ISO 376, Metallic materials Calibration of force-proving instruments used for the verification of uniaxial testing machines DIN EN ISO 6506-1, Metallic materials Brinell hardness test Part 1: Test method DIN EN ISO 6506-3, Metallic materials Brinell hardness test Part 3: Calibrat
24、ion of reference blocks DIN EN ISO 6507-1, Metallic materials Vickers hardness test Part 1: Test method DIN EN ISO 6506-2:2015-02 6 This page is intentionally blank EN ISO 6506-2September 2014 ICS 77.040.10 Supersedes EN ISO 6506-2:2005English Version Metallic materials - Brinell hardness test - Par
25、t 2: Verification andcalibration of testing machines (ISO 6506-2:2014) Matriaux mtalliques - Essai de duret Brinell - Partie 2:Vrification et talonnage des machines dessai(ISO 6506-2:2014)Metallische Werkstoffe - Hrteprfung nach Brinell - Teil 2:berprfung und Kalibrierung der Prfmaschinen(ISO 6506-2
26、:2014)This European Standard was approved by CEN on 30 August 2014. 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 bibliographica
27、l references 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 o
28、f a CEN member 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 Ma
29、cedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CE
30、N All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 6506-2:2014 EEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORM2DIN EN ISO 6506-2:2015
31、-02 EN ISO 6506-2:2014 (E) Contents Page Foreword . 3 1 Scope . 4 2 Normative references. 4 3 General conditions . 4 4 Direct verification . 5 4.1 General 5 4.2 Measurement of the test forces 5 4.3 Measurement of the properties of the indenter ball . 5 4.4 Calibration of the indentation diameter mea
32、suring system 6 4.5 Verification of the testing cycle 7 5 Indirect verification 7 6 Intervals between verifications . 8 7 Verification report/calibration certificate. 9 Annex A (informative) Uncertainty of measurement of the verification results of the hardness testing machine 10 Annex B (normative)
33、 Verification of hardness testing machines that are incapable of meeting the specified force/time profile . 17 Bibliography 18 ForewordThis document (EN ISO 6506-2:2014) has been prepared by Technical Committee ISO/TC 164 “Mechanical testing of metals” in collaboration with Technical Committee ECISS
34、/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 of an identical text or by endorsement, at the latest by March 2015, and conflicting national stan
35、dards shall be withdrawn at the latest by March 2015. 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 be held responsible for identifying any or all such patent rights. This document supersedes EN ISO
36、6506-2:2005. 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, Estonia, Finland, Former Yugoslav Republic of Macedonia
37、, 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 The text of ISO 6506-2:2014 has been approved by CEN as
38、 EN ISO 6506-2:2014 without any modification. EN ISO 6506 consists of the following parts, under the general title Metallic materials Brinell hardness test: Part 1: Test method Part 2: Verification and calibration of testing machines Part 3: Calibration of reference blocks Part 4: Table of hardness
39、values 3DIN EN ISO 6506-2:2015-02EN ISO 6506-2:2014 (E)1 ScopeThis part of ISO 6506 specifies methods of direct and indirect verification of testing machines used for determining Brinell hardness in accordance with ISO 6506-1, and also specifies when these two types of verification has to be perform
40、ed.The direct verification involves checking that individual machine performance parameters fall within specified limits whereas the indirect verification utilizes hardness measurements of reference blocks, calibrated in accordance with ISO 6506-3, to check the machines overall performance.If a test
41、ing machine is also to be used for other methods of hardness testing, it has to be verified independently for each method.This part of ISO 6506 is applicable to both fixed location and portable hardness testing machines. For machines that are incapable of satisfying the specified force-time profile,
42、 the direct verification of force and testing cycle can be modified by the use of Annex B.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. F
43、or undated references, the latest edition of the referenced document (including any amendments) applies.ISO 376, Metallic materials Calibration of force-proving instruments used for the verification of uniaxial testing machinesISO 6506-1:2014, Metallic materials Brinell hardness test Part 1: Test me
44、thodISO 6506-3, Metallic materials Brinell hardness test Part 3: Calibration of reference blocksISO 6507-1, Metallic materials Vickers hardness test Part 1: Test method3 General conditionsBefore a Brinell hardness testing machine is verified, the machine shall be checked to ensure that it is properl
45、y set up in accordance with the manufacturers instructions.Especially, it should be checked thata) the mount holding the ball-holder slides correctly in its guide,b) every ball-holder with a ball used during the calibration is firmly held in the mount,c) the test force is applied and removed without
46、 shock, vibration, or overrun and in such a manner that the readings are not influenced, andd) if the indentation diameter measuring system is integrated into the machine, the change from removing the test force to measuring mode does not influence the diameter measurements,4DIN EN ISO 6506-2:2015-0
47、2 EN ISO 6506-2:2014 (E) the illumination does not affect the diameter measurements, and the centre of the indentation is in the centre of the field of view, if necessary.4 Direct verification4.1 General4.1.1 Direct verification should be carried out at a temperature of (23 5) C. If the verification
48、 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 the SI.4.1.3 Direct verification involvesa) measurement of the test forces,b) measurement of the diameter, hardness, and density of the indente
49、r ball,c) calibration of the indentation diameter measuring system, andd) measurement of the testing cycle.For each of the above items, direct verification also includes assessment of the results against the specified tolerances.4.2 Measurement of the test forces4.2.1 Each test force shall be measured within the working range of the testing machine. When the force is applied in open-loop mod
