BS-ISO-11971-2008.pdf
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1、BS ISO 11971:2008 ICS 77.040.20; 77.140.80 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Steel and iron castings Visual examination of surface quality Licensed CopyChinese University of Hong Kong, 21/10/2008 03:52, Uncontrolled Copy, (c) BSI This British Sta
2、ndard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2008 BSI 2008 ISBN 978 0 580 56250 1 Amendments/corrigenda issued since publication DateComments BS ISO 11971:2008 National foreword This British Standard is the UK implementation of ISO 11971:2008
3、. The UK participation in its preparation was entrusted to Technical Committee ISE/6, Steel castings. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are
4、responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Licensed CopyChinese University of Hong Kong, 21/10/2008 03:52, Uncontrolled Copy, (c) BSI BS ISO 11971:2008 Reference number ISO 11971:2008(E) ISO 2008 INTERNATIONAL STANDARD I
5、SO 11971 Second edition 2008-09-01 Steel and iron castings Visual examination of surface quality Pices moules en acier ou en fonte Examen visuel de ltat de surface Licensed CopyChinese University of Hong Kong, 21/10/2008 03:52, Uncontrolled Copy, (c) BSI BS ISO 11971:2008 ISO 11971:2008(E) PDF discl
6、aimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties a
7、ccept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to th
8、e file; 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. COPYRIGHT PROTE
9、CTED DOCUMENT ISO 2008 All rights reserved. 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 me
10、mber body in the country of the requester. 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 2008 All rights reserved Licensed CopyChinese University of Hong Kong, 21/10/2008 03:
11、52, Uncontrolled Copy, (c) BSI BS ISO 11971:2008 ISO 11971:2008(E) ISO 2008 All rights reserved iii 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
12、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, also take part in the wo
13、rk. 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 Inte
14、rnational 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 t
15、he 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 11971 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 11, Steel castings. This second edition cancels and replaces the first ed
16、ition (ISO 11971:1997), which has been technically revised. Licensed CopyChinese University of Hong Kong, 21/10/2008 03:52, Uncontrolled Copy, (c) BSI BS ISO 11971:2008 ISO 11971:2008(E) iv ISO 2008 All rights reserved Introduction The surface roughness of a casting is influenced by the manufacturin
17、g process (moulding, grinding, finishing, etc.), the moulding materials used (sand, coating, etc.), the equipment available and the alloy cast. Since cast surfaces do not exhibit the same cyclic character as machined surfaces, it is difficult to evaluate their roughness using conventional mechanical
18、, optical, or pneumatic devices. The use of visual/tactile comparators is therefore preferred in these circumstances. Moreover, in order to take account of the irregularities on as-cast surfaces, ground surfaces or other means of finishing of castings, comparators should have relatively large dimens
19、ions (greater than or equal to 15 000 mm2) in order to make them more reliable and their results repeatable and consistent. Two sets of comparators are in widespread use: SCRATA comparators for the definition of surface quality of steel castings, available from Steel Castings Technology Internationa
20、l, 7 East Bank Road, Sheffield S2 3PT, United Kingdom; BNIF 359, Recommandation technique du Bureau de Normalisation des Industries de la Fonderie. Caractrisation dtats de surface des pices moules Utilisation des chantillons types de 110 160 mm, available from Editions Techniques des Industries de l
21、a Fonderie, 44 avenue de la Division Leclerc, 92310 Svres, France. Licensed CopyChinese University of Hong Kong, 21/10/2008 03:52, Uncontrolled Copy, (c) BSI BS ISO 11971:2008 INTERNATIONAL STANDARD ISO 11971:2008(E) ISO 2008 All rights reserved 1 Steel and iron castings Visual examination of surfac
22、e quality 1 Scope 1.1 This International Standard covers the acceptance criteria for the surface inspection of steel and iron castings by visual examination. 1.2 Acceptance levels utilize Bureau de Normalisation des Industries de la Fonderie (BNIF) and Steel Castings Research and Trade Association (
23、SCRATA) reference comparators for the visual determination of surface roughness and surface discontinuities described as follows: surface roughness; thermal dressing; mechanical dressing; nonmetallic inclusions; gas porosity; fusion discontinuities; expansion discontinuities; metal inserts. 2 Orderi
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