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1、a Date: 3 December 2008 Origin: International Latest date for receipt of comments: 14 March 2009 Project no.: 2008/00319 Responsible committee: ISE/65 Sintered metal components Interested committees: Title: Draft BS ISO 23519 Sintered metal materials, excluding hardmetals - Measurement of surface ro
2、ughness Supersession information: If this document is published as a standard, the UK implementation of it will supersede NONE and partially supersede. NONE If you are aware of a current national standard which may be affected, please notify the secretary (contact details below). WARNING: THIS IS A
3、DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 14 March 2009. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. No acknowledgement will normally be sent. See overleaf for info
4、rmation on commenting. No copying is allowed, in any form, without prior written permission from BSI except as permitted under the Copyright, Designs and Patent Act 1988 or for circulation within a nominating organization for briefing purposes. Electronic circulation is limited to dissemination by e
5、-mail within such an organization by committee members. Further copies of this draft may be purchased from BSI Customer Services, Tel: +44(0) 20 8996 9001 or email . British, International and foreign standards are also available from BSI Customer Services. Information on the co-operating organizati
6、ons represented on the committees referenced above may be obtained from the responsible committee secretary. Cross-references The British Standards which implement International or European publications referred to in this draft may be found via the British Standards Online Service on the BSI web si
7、te http:/. Direct tel: 020 8996 7009 Responsible Committee Secretary: Committee Service Centre (BSI) E-mail: Draft for Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 8.0 DPC: 08/30176943 DC Licensed Copy: London
8、South Bank University, South Bank University, 02/02/2009 04:09, Uncontrolled Copy, (c) BSI b Introduction This draft standard is based on international discussions in which the UK has taken an active part. Your comments on this draft are invited and will assist in the preparation of the consequent s
9、tandard. Comments submitted will be reviewed by the relevant BSI committee before sending the consensus UK vote and comments to the international secretariat, which will then decide appropriate action on the draft and the comments received. If the international standard is approved, it is possible t
10、he text will be published as an identical British Standard. UK Vote Please indicate whether you consider the UK should submit a negative (with reasons) or positive vote on this draft. Submission The guidance given below is intended to ensure that all comments receive efficient and appropriate attent
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13、ents and how to obtain a blank electronic version of a comment form are available from the BSI web site at: http:/ Template for comments and secretariat observations Date: xx/xx/200x Document: ISO/DIS xxxxx 1 2 (3) 4 5 (6) (7) MB Clause No./ Subclause No./ Annex (e.g. 3.1) Paragraph/ Figure/Table/ N
14、ote (e.g. Table 1) Type of com- ment Comment (justification for change) by the MB Proposed change by the MB Secretariat observations on each comment submitted 3.1 Definition 1 ed Definition is ambiguous and needs clarifying. Amend to read . so that the mains connector to which no connection . 6.4 Pa
15、ragraph 2 te The use of the UV photometer as an alternative cannot be supported as serious problems have been encountered in its use in the UK. Delete reference to UV photometer. Microsoft and MS-DOS are registered trademarks, and Windows is a trademark of Microsoft Corporation. Licensed Copy: Londo
16、n South Bank University, South Bank University, 02/02/2009 04:09, Uncontrolled Copy, (c) BSI THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH. IN ADDITION TO THEIR EVALUATIO
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18、UBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION. DRAFT INTERNATIONAL STANDARD ISO/DIS 23519 International Organization for Standardization, 2008 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNAT
19、IONALE DE NORMALISATION ISO/TC 119/SC 3 Voting begins on: 2008-11-28 Secretariat: DIN Voting terminates on: 2009-04-28 Sintered metal materials, excluding hardmetals Measurement of surface roughness Matriaux mtalliques fritts, lexclusion des mtaux-durs Mesurage de la rugosit de surface ICS 77.160 In
20、 accordance with the provisions of Council Resolution 15/1993 this document is circulated in the English language only. Conformment aux dispositions de la Rsolution du Conseil 15/1993, ce document est distribu en version anglaise seulement. To expedite distribution, this document is circulated as re
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22、ra effectu au Secrtariat central de lISO au stade de publication. Licensed Copy: London South Bank University, South Bank University, 02/02/2009 04:09, Uncontrolled Copy, (c) BSI ISO/DIS 23519 ii ISO 2008 All rights reserved PDF disclaimer This PDF file may contain embedded typefaces. In accordance
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28、 www.iso.org Reproduction may be subject to royalty payments or a licensing agreement. Violators may be prosecuted. Licensed Copy: London South Bank University, South Bank University, 02/02/2009 04:09, Uncontrolled Copy, (c) BSI ISO/DIS 23519 ISO 2008 All rights reserved iii Contents Page Foreword i
29、v 1 Scope1 2 Normative References.1 3 Symbols and Units1 4 Principle .2 5 Procedure.2 6 Expression of results3 Bibliography4 Licensed Copy: London South Bank University, South Bank University, 02/02/2009 04:09, Uncontrolled Copy, (c) BSI ISO/DIS 23519 iv ISO 2008 All rights reserved Foreword ISO (th
30、e 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 for which a technical committ
31、ee 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 all matters of electrotechn
32、ical 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 International Standards. Draft International Standards adopted by the technical committees are circulated to the member
33、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 the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying
34、any or all such patent rights. ISO 23519 was prepared by Technical Committee ISO/TC 119, Powder metallurgy, Subcommittee SC 3, Sampling and testing methods for sintered metal materials (excluding hardmetals). Licensed Copy: London South Bank University, South Bank University, 02/02/2009 04:09, Uncon
35、trolled Copy, (c) BSI DRAFT INTERNATIONAL STANDARD ISO/DIS 23519 ISO 2008 All rights reserved 1 Sintered metal materials, excluding hardmetals Measurement of surface roughness 1 Scope The International Standard specifies a method to determine the surface roughness of sintered parts. It also establis
36、hes principles for the use of the suitable units for measurement. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced docum
37、ent (including any amendments) applies. ISO 4287, Geometrical Product Specification (GPS) - Surface texture: Profile method - Terms, definitions and surface texture parameters ISO 13565-1, Geometrical Product Specifications (GPS) Surface texture: Profile method; Surface having stratified functional
38、properties Part 1: Filtering and general measurement conditions ISO 13565-2, Geometrical Product Specifications (GPS) Surface texture: Profile method; Surfaces having stratified functional properties Part 2: Height characterization using the linear material ratio curve ISO 13565-3, Geometrical Produ
39、ct Specifications (GPS) Surface texture: Profile method; Surfaces having stratified functional properties Part 3: Height characterization using the material probability curve 3 Symbols and Units For the purpose of this document, the following symbols and units apply. Symbol Designation Unit Rpk Redu
40、ced peak height m Rp Maximum profile peak height m Rv Maximum profile valley depth m Rz Maximum height of profile m Rt Total height of profile m Ra Arithmetic mean deviation of the assessed profile m Rq Root mean square deviation of the assessed profile m Rs Surface roughness m Licensed Copy: London
41、 South Bank University, South Bank University, 02/02/2009 04:09, Uncontrolled Copy, (c) BSI ISO/DIS 23519 2 ISO 2008 All rights reserved Symbol Designation Unit RSm Mean width of the profile elements m )(cRmr Material ratio of the profile % Rk Core roughness depth m Rvk Reduced valley height m d Den
42、sity g/cm3 c Calibration Constant - 4 Principle The surface roughness is measured according to standard procedures. Because of the porosity and the nature of the surface of sintered materials, their surface roughness cannot be compared with the surface roughness of wrought materials. As most of the
43、roughness units are defined by measuring the height of the surface peaks, porosity will negatively influence this value, because the depth of the pore will increase the value of the peak. This standard specifies the most suitable way to measure surface roughness and the correct units to use. All the
44、 terminology and procedures defined in standards listed in Clause 2 are also applicable to the present standard. 5 Procedure The surface roughness should be measured according to ISO 13565-1, ISO 13565-2 and ISO 13565-3, by using the following particular parameters: a) Use always a filtered profile
45、(roughness profile), by applying the standard gaussian filter, with a Cut-Off of 0,8 mm. b) Use a total evaluation length of 4 mm, which is 5 times the Cut-Off value of 0,8 mm; NOTE 1 Only in case of roughness higher than 4,0 Ra, the Cut-Off will be increased up to 2,5 mm, so the new evaluation leng
46、th will be 12,5 mm. This is because the surface is so irregular that a longer evaluation length is necessary to obtain a real statistical approach. c) Use a probe of radius most requires 2 micrometres in order to define as well as possible the surface irregularities; d) Do not consider in the measur
47、ement the first 5% of depth; e) Express the results in unit Rk and Rpk. Roughness units that are strongly affected by porosity, which are not really characterising the surface state, but rather the addition between the surface state and the size of the open porosity, shall not be used. This is the c
48、ase for Rp, Rv, Rz, Rt, Ra, Rq, Rs, RSm shows sometimes too high peaks because filtering overemphasizes peaks after the probe has passed a deep pore, so it is also not a suitable unit. In order to illustrated the convenience of Rpk and the inconvenience of other units typical from wrought materials,
49、 the next comparison between different surfaces and materials are shown in Table 1 and Table 2. Licensed Copy: London South Bank University, South Bank University, 02/02/2009 04:09, Uncontrolled Copy, (c) BSI ISO/DIS 23519 ISO 2008 All rights reserved 3 Table 1 Example of roughnessof sintered materials Material Surface profile Bac