1、BS ISO23519:2010ICS 77.160NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDSintered metalmaterials, excludinghardmetals Measurement ofsurface roughnessThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 30 June201
2、0 BSI 2010ISBN 978 0 580 61817 8Amendments/corrigenda issued since publicationDate CommentsBS ISO 23519:2010National forewordThis British Standard is the UK implementation of ISO 23519:2010.The UK participation in its preparation was entrusted to TechnicalCommittee ISE/65, Sintered metal components.
3、A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom leg
4、al obligations.BS ISO 23519:2010Reference numberISO 23519:2010(E)ISO 2010INTERNATIONAL STANDARD ISO23519First edition2010-06-01Sintered metal materials, excluding hardmetals Measurement of surface roughness Matriaux mtalliques fritts, lexclusion des mtaux-durs Mesurage de la rugosit de surface BS IS
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10、3519:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword iv 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 Symbols and units.2 5 Principle2 6 Procedure.3 7 Expression of results4 Bibliography5 BS ISO 23519:2010ISO 23519:2010(E) iv ISO 2010 All rights reservedForeword ISO (t
11、he 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 commit
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13、nical 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
14、 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
15、 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). BS ISO 23519:2010INTERNATIONAL STANDARD ISO 23519:2010(E) ISO 2010 All rights reserved 1Si
16、ntered metal materials, excluding hardmetals Measurement of surface roughness 1 Scope This International Standard specifies a method to determine the surface roughness of sintered parts of metal materials. It also establishes principles for the use of the suitable parameters for measurement. 2 Norma
17、tive 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 document (including any amendments) applies. ISO 4287, Geometrical Product Spe
18、cification (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 properties Part 1: Filtering and general measurement conditions ISO 13565-2,
19、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 Product Specifications (GPS) Surface texture: Profile method; Surfaces having stra
20、tified functional properties Part 3: Height characterization using the material probability curve 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 4287 apply. BS ISO 23519:2010ISO 23519:2010(E) 2 ISO 2010 All rights reserved4 Symbols and units For the
21、 purposes of this document, the following symbols and units apply. Symbol Quantity Unit Rpk Reduced 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 R
22、oot mean square deviation of the assessed profile m Rs Surface roughness m RSm Mean width of the profile elements m Rmr(c) Material ratio of the profile % Rk Core roughness depth mRvk Reduced valley depth m d Density g/cm3c Level m5 Principle The surface roughness is measured according to standard p
23、rocedures. 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 roughness parameters are defined by measuring the height of the surface peaks, porosity will negatively i
24、nfluence this value, because the depth of the pore will increase the value of the peak. This International Standard specifies the most suitable way to measure surface roughness and the correct parameters to use. BS ISO 23519:2010ISO 23519:2010(E) ISO 2010 All rights reserved 36 Procedure The surface
25、 roughness shall be measured in accordance with ISO 13565-1, ISO 13565-2 and ISO 13565-3, by using the following particular parameters: a) always use a filtered profile (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,
26、which is five times the cut-off value of 0,8 mm; NOTE Only in the case of a roughness higher than 4,0 Ra, the cut-off will be increased up to 2,5 mm, so the new evaluation length will be 12,5 mm. This is because the surface is so irregular that a longer evaluation length is necessary to obtain a rea
27、l statistical approach. c) use a probe with a radius of 2 m that will define the surface irregularities as well as possible; d) express the results as parameters Rk and Rpk, in micrometres. Roughness parameters that are strongly affected by porosity, which do not really characterize the surface stat
28、e, but rather the addition between the surface state and the size of the open porosity, shall not be used. This is the case for Rp, Rv, Rz, Rt, Ra, Rq, Rs and RSm. In order to illustrate the convenience of Rpk and the inconvenience of other parameters typical for wrought materials, a comparison betw
29、een different materials and surface conditions is shown in Table 1. BS ISO 23519:2010ISO 23519:2010(E) 4 ISO 2010 All rights reservedTable 1 Comparison of roughness of powder metallurgy (PM) material with wrought materials Material Surface profile BACacurve supporting surface Roughness Ra = 1,22 Rt
30、= 10,6 Rmr(3) = 91 %Rpk = 0,8 Rk = 0,6 Sintered and sized d = 6,6 g/cm3Figure 1 Surface profile Sintered and sized Figure 2 BAC curve Sintered and sized Rvk = 9,1 Ra = 1,28 Rt = 10,7 Rmr(3) = 20 %Rpk = 4,5 Rk = 5,4 Turned solid material Figure 3 Surface profile Turned solid material Figure 4 BAC cur
31、ve Turned solid material Rvk = 0,6 Ra = 0,6 Rt = 4,2 Rmr(3) = 83 %Rpk = 1,3 Rk = 1,4 Ground solid material Figure 5 Surface profile Ground solid material Figure 6 BAC curve Ground solid material Rvk = 1,3 NOTE The way to obtain the BAC curve and to determine the Rpk- and Rvk-roughness parameters are
32、 described in ISO 4287 and ISO 13565-2. aBAC: Bearing area curve. 7 Expression of results The result is the surface roughness, expressed as parameters Rk and Rpk, in micrometres. The result should be reported to the nearest 0,1 m. BS ISO 23519:2010ISO 23519:2010(E) ISO 2010 All rights reserved 5Bibl
33、iography 1 ISO 3274, Geometrical Product Specifications (GPS) Surface texture: Profile method Nominal characteristics of contact (stylus) instruments 2 ISO 4288, Geometrical Product Specifications (GPS) Surface texture: Profile method Rules and procedures for the assessment of surface texture 3 ISO
34、11562, Geometrical Product Specifications (GPS) Surface texture: Profile method Metrological characteristics of phase correct filters 4 ISO 12085, Geometrical Product Specification (GPS) Surface texture: Profile method Motif parameters BS ISO 23519:2010ISO 23519:2010(E) ICS 77.160 Price based on 5 p
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