ISO-4545-3-2005.pdf
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1、 Reference number ISO 4545-3:2005(E) ISO 2005 INTERNATIONAL STANDARD ISO 4545-3 First edition 2005-11-15 Metallic materials Knoop hardness test Part 3: Calibration of reference blocks Matriaux mtalliques Essai de duret Knoop Partie 3: talonnage des blocs de rfrence ISO 4545-3:2005(E) PDF disclaimer
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4、; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2005 All rights r
5、eserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the req
6、uester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2005 All rights reserved ISO 4545-3:2005(E) ISO 2005 All rights reserved iii Contents Page Foreword iv 1 Scope . 1 2 Nor
7、mative references. 1 3 Manufacture of the block . 1 4 Calibration machine 2 5 Calibration procedure. 3 6 Number of indentations 3 7 Uniformity of hardness. 3 8 Marking 4 9 Validity . 4 Annex A (informative) Adjustment of Kohler illumination systems 5 Annex B (informative) Uncertainty of measurement
8、of hardness-reference blocks. 6 Bibliography. 9 ISO 4545-3:2005(E) iv ISO 2005 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally c
9、arried 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, also take part in the wor
10、k. 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 committees is to prepare Inter
11、national 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 possibility that some of th
12、e 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 4545-3 was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcommittee SC 3, Hardness testing. ISO 4545-3 cancels and repla
13、ces the first edition of ISO 4547:1993, which has been technically revised. ISO 4545 consists of the following parts, under the general title Metallic materials Knoop hardness test: Part 1: Test method Part 2:Verification and calibration of testing machines Part 3: Calibration of reference blocks Pa
14、rt 4: Table of hardness values INTERNATIONAL STANDARD ISO 4545-3:2005(E) ISO 2005 All rights reserved 1 Metallic materials Knoop hardness test Part 3: Calibration of reference blocks 1 Scope This part of ISO 4545 specifies the method for the calibration of reference blocks to be used for the indirec
15、t verification of Knoop hardness testing machines as specified in ISO 4545-2. The method is applicable only for indentations with long diagonals W 0,020 mm. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only th
16、e edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 376:2004, Metallic materials Calibration of force-proving instruments used for the verification of uniaxial testing machines ISO 4287:1997, Geometrical Product Speci
17、fications (GPS) Surface texture: Profile method Terms, definitions and surface texture parameters ISO 4545-1:2005, Metallic materials Knoop hardness test Part 1: Test method ISO 4545-2, Metallic materials Knoop hardness test Part 2: Verification and calibration of testing machines 3 Manufacture of t
18、he block 3.1 The block shall be specially manufactured for use as a hardness-reference block. NOTE Attention is drawn to the need to use a manufacturing process which will give the necessary homogeneity, stability of structure and uniformity of surface hardness. 3.2 The reference block thickness sha
19、ll be greater than twenty times the depth of indentation made with the certified test force. 3.3 The reference blocks shall be free of magnetism. 3.4 The maximum deviation in flatness of the surfaces shall not exceed 0,005 mm. 3.5 The maximum error in parallelism shall not exceed 0,010 mm/50 mm. ISO
20、 4545-3:2005(E) 2 ISO 2005 All rights reserved 3.6 The test surface shall be free from scratches which interfere with the measurement of the indentations. The surface roughness Ra shall not exceed 0,1 m for the test surface. The sampling length L shall be 0,80 mm (see ISO 4287:1997, 3.1.9). 3.7 To v
21、erify that no material is subsequently removed from the reference block, the thickness at the time of calibration shall be marked on it, to the nearest 0,1 mm, or an identifying mark shall be made on the test surface see 8.1.e). 4 Calibration machine 4.1 In addition to fulfilling the general require
22、ments specified in ISO 4545-2, the calibration machine shall also meet the requirements given in 4.2 to 4.7. NOTE Examples of procedures for adjustment of illumination systems are given in Annex A. 4.2 The machine shall have been directly verified in intervals not exceeding 12 months. Direct verific
23、ation involves: a) calibration of the test force; b) verification of the indenter; c) calibration of the measuring device; d) verification of the testing cycle; if this is not possible, at least the force versus time behaviour. 4.3 The instruments used for verification and calibration shall be trace
24、able to national standards. 4.4 Each test force shall be measured three times using an elastic proving device (of ISO 376:2004, Class 0,5 or better), or by another method having the same or better accuracy. Each measurement shall agree with the nominal value to within 0,5 %. 4.5 The indenter shall m
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