EN ISO 6507-3-2018 en Metallic materials - Vickers hardness test - Part 3 Calibration of reference blocks.pdf

1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Metallic materials - Vickers hardness testPart 3: Calibration of reference blocksBS EN ISO 6507-3:2018National forewordThis British Standard is the UK implementation of EN ISO 6507-3:2018. It is identical to ISO 6507-3:

2、2018. It supersedes BS EN ISO 6507-3:2005, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee ISE/101/5, Indentation hardness testing.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does n

3、ot purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 84395 2ICS 77.040.10Compliance with a British Standard cannot confer immunity from legal o

4、bligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 6507-3:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 6507-3March 20

5、18ICS 77.040.10 Supersedes EN ISO 6507-3:2005EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. EN ISO 6507-3:2018: EAll rights of exploitation in any form and by any mea

6、ns reserved worldwide for CEN national MembersMetallic materials - Vickers hardness test - Part 3: Calibration of reference blocks (ISO 6507-3:2018)Matriaux mtalliques - Essai de duret Vickers - Partie 3: talonnage des blocs de rfrence (ISO 6507-3:2018)Metallische Werkstoffe - Hrteprfung nach Vicker

7、s - Teil 3: Kalibrierung von Hrtevergleichsplatten (ISO 6507-3:2018)This European Standard was approved by CEN on 18 January 2018.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 standa

8、rd 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.This European Standard exists in three official versions (English, French, German). A version in any

9、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 members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republi

10、c, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.Engl

11、ish VersionEN ISO 6507-3:2018 (E)European forewordThis document (EN ISO 6507-3:2018) has been prepared by Technical 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 wh

12、ich 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 September 2018, and conflicting national standards shall be withdrawn at the latest by September 2018.Attention is drawn to the

13、 possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.This document supersedes EN ISO 6507-3:2005.According to the CEN-CENELEC Internal Regulations, the national standards organizat

14、ions 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malt

15、a, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.Endorsement noticeThe text of ISO 6507-3:2018 has been approved by CEN as EN ISO 6507-3:2018 without any modification.2BS EN ISO 6507-3:2018ISO 6507-3:2018(E)Forew

16、ord iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Manufacture of reference blocks . 14.1 General . 14.2 Thickness . 14.3 Test surface area 14.4 Magnetism . 24.5 Flatness and parallelism . 24.6 Surface roughness 24.7 Prevention of the regrind of the test surface 25 Calibration mac

17、hine 25.1 General . 25.2 Direct verification . 25.3 Traceability of verification instruments . 25.4 Test force 35.5 Indenter . 35.6 Diagonal measuring system . 46 Calibration procedure . 57 Number of indentations 58 Uniformity of hardness 68.1 Relative non-uniformity 68.2 Uncertainty of measurement

18、79 Marking 710 Calibration certificate . 711 Validity 8Annex A (informative) Uncertainty of the mean hardness value of hardness reference blocks 9Annex B (informative) Adjustment of Khler illumination systems 14Bibliography .15 ISO 2018 All rights reserved iiiContents PageBS EN ISO 6507-3:2018ISO 65

19、07-3:2018(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject fo

20、r 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, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on

21、all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted.

22、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 possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any

23、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 of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of user

24、s and does not constitute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers

25、 to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcommittee SC 3, Hardness testing.This fourth edition cancels and replaces the third edition (ISO 6507-3:2005), which has been technicall

26、y revised.The main changes compared to the previous edition are as follows: requirements have been added for the maximum test surface area of the reference block; requirements have been revised for the maximum uncertainty of the line intervals on the stage micrometer; requirements for the calibratio

27、n and verification of the measuring system have been revised per ISO 6507-2; requirements for the uniformity of the reference block hardness have been revised to account for different numbers of calibration indentations; the timing requirements for the approach velocity and the time duration at maxi

28、mum test force have been revised to indicate a target time value; Annex A has been revised.A list of all parts in the ISO 6507 series can be found on the ISO website.iv ISO 2018 All rights reservedBS EN ISO 6507-3:2018INTERNATIONAL STANDARD ISO 6507-3:2018(E)Metallic materials Vickers hardness test

29、Part 3: Calibration of reference blocks1 ScopeThis document specifies a method for the calibration of reference blocks to be used for the indirect verification of Vickers hardness testing machines, as specified in ISO 6507-2.The method is applicable only for indentations with diagonals 0,020 mm.2 No

30、rmative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any

31、amendments) applies.ISO 376, Metallic materials Calibration of force-proving instruments used for the verification of uniaxial testing machinesISO 6507-1, Metallic materials Vickers hardness test Part 1: Test methodISO 6507-2, Metallic materials Vickers hardness test Part 2: Verification and calibra

32、tion of testing machines3 Terms and definitionsNo terms and definitions are listed in this document.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available

33、at http:/www.iso.org/obp4 Manufacture of reference blocks4.1 GeneralThe block shall be specially manufactured for use as a hardness-reference block using a manufacturing process that will give the necessary homogeneity, stability of structure, uniformity of surface hardness and time-dependent stabil

34、ity in hardness.4.2 ThicknessThe thickness of the reference block shall not be less than 5 mm.4.3 Test surface areaThe test surface area of the reference block shall not exceed 40 cm2. ISO 2018 All rights reserved 1BS EN ISO 6507-3:2018ISO 6507-3:2018(E)4.4 MagnetismThe reference blocks shall be fre

35、e of magnetism. It is recommended that the manufacturer shall ensure that the blocks, if made of steel, have been demagnetized at the end of the manufacturing process (before calibration).4.5 Flatness and parallelismThe maximum deviation in flatness of the test and support surfaces shall not exceed

36、0,005 mm. The maximum error in parallelism shall not exceed 0,010 mm in 50 mm.4.6 Surface roughnessThe test surface shall be free from scratches that interfere with the measurement of the indentations. The test surface roughness, Ra, shall not exceed 0,05 m.1The bottom support surface shall be a fin

37、ely ground finish or better.4.7 Prevention of the regrind of the test surfaceTo verify that no material has been subsequently removed from the reference block, its thickness at the time of calibration shall be marked on the reference block to the nearest 0,01 mm or an identifying mark shall be made

38、on the test surface see Clause 9 e).5 Calibration machine5.1 GeneralIn addition to fulfilling the general requirements specified in ISO 6507-2, the calibration machine shall also meet the requirements given in 5.2 to 5.6.NOTE The criteria specified in this document for the performance of the calibra

39、tion machine have been developed and refined over a significant period of time. When determining a specific tolerance that the machine needs to meet, the uncertainty associated with the use of measuring equipment and/or reference standards has been incorporated within this tolerance and it would the

40、refore be inappropriate to make any further allowance for this uncertainty by, for example, reducing the tolerance by the measurement uncertainty. This applies to all measurements made when performing a direct verification of the calibration machine.5.2 Direct verificationThe calibration machine sha

41、ll be verified directly at intervals not exceeding 12 months.Direct verification involvesa) verification of the test force,b) verification of the indenter,c) calibration and verification of the diagonal measuring system, andd) verification of the testing cycle; if this is not possible, at least the

42、force versus time behaviour.5.3 Traceability of verification instrumentsThe instruments used for verification and calibration shall be traceable to national standards.2 ISO 2018 All rights reservedBS EN ISO 6507-3:2018ISO 6507-3:2018(E)5.4 Test forceEach test force shall be verified at three differe

43、nt positions of the plunger, spaced at approximately equal increments covering the limits of travel used during testing. At each position, the force shall be measured three times using an elastic proving device according to ISO 376, class 0,5 or better or by another method having the same or better

44、accuracy. Each measurement shall agree with the nominal value to within 0,2 % for normal hardness, to within 0,3 % for low-force hardness and to within 0,5 % for microhardness.5.5 IndenterThe indenter shall comply with ISO 6507-2 and meet the following requirements.a) The four faces of the square-ba

45、sed diamond pyramid shall be highly polished, free from surface defects and flat within 0,000 3 mm.b) The angle between the opposite faces of the vertex of the diamond pyramid shall be 136 0,1.c) The angle between the axis of the diamond pyramid and the axis of the indenter-holder (normal to the sea

46、ting surface) shall be less than 0,3.d) The point of the diamond indenter shall be examined with a high-power measuring microscope or preferably with an interference microscope. If the four faces do not meet at a point, the line of junction, as described in ISO 6507-2, between opposite faces shall c

47、omply with the values in Table 1.Table 1Ranges of test force, F NMaximum permissible length of the line of junction, a mmF 49,03 0,0011,961 F 0,200 0,000 5 mm 0,001 mmThe system for measuring the diagonal of the indentation shall be verified at each magnification and for each incorporated line scale

48、 to be used in two perpendicular measurement axis (if applicable), by performing measurements on an accurately ruled stage micrometer. Measurements shall be made at a minimum of five evenly spaced intervals, arranged centrally in the field of view, covering each working range.The maximum expanded un

49、certainty of the distance between the line intervals on the stage micrometer shall be 0,000 2 mm or 0,04 %, whichever is greater.4 ISO 2018 All rights reservedBS EN ISO 6507-3:2018ISO 6507-3:2018(E)Three measurements shall be made at each of the evenly spaced intervals. The maximum permissible error of each of the three measurements at each interval shall not exceed the values given in Table 2.NOTE A helpful technique for adjusting optical systems that have Khler illumination is given in Annex B.6 Calibration pro