1、December 2015 English price group 6No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 77.160!%IV?“2385128www.din.deDIN
2、 ISO 23519Sintered metal materials, excluding hardmetals Measurement of surface roughness (ISO 23519:2010),English translation of DIN ISO 23519:2015-12Sintermetalle, ausgenommen Hartmetalle Messung der Oberflchenrauheit (ISO 23519:2010),Englische bersetzung von DIN ISO 23519:2015-12Matriaux mtalliqu
3、es fritts, lexclusion des mtaux-durs Mesurage de la rugosit de surface (ISO 23519:2010),Traduction anglaise de DIN ISO 23519:2015-12www.beuth.deDocument comprises pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.911.15 A comma i
4、s used as the decimal marker. Contents Page National foreword .3 National Annex NA (informative) Bibliography 4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Symbols and units .6 5 Principle 6 6 Procedure .7 7 Expression of results 8 Bibliography 9 DIN ISO 23519:2015-122 National f
5、oreword This document (ISO 23519:2010) has been prepared by Technical Committee ISO/TC 119 “Powder metallurgy”, (Secretariat: SIS, Sweden). The responsible German body involved in its preparation was DIN-Normenausschuss Werkstofftechnologie (DIN Standards Committee Technology of Materials), Working
6、Committee NA 145-01-03 AA Probenahme und Prfverfahren fr Sintermetalle (ausgenommen Hartmetalle). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. DIN and/or DKE shall not be held responsible for identifying any or all such patent
7、rights. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 3274 DIN EN ISO 3274 ISO 4287 DIN EN ISO 4287 ISO 4288 DIN EN ISO 4288 ISO 11562 DIN EN ISO 11562*ISO 12085 DIN EN ISO 12085 ISO 13565-1 DIN EN ISO 13565-1 ISO 13565-2 DIN EN ISO 1
8、3565-2 ISO 13565-3 DIN EN ISO 13565-3 * DIN EN ISO 11562 has been withdrawn and replaced by DIN EN ISO 16610-21. DIN ISO 23519:2015-123 National Annex NA (informative) Bibliography DIN EN ISO 3274, Geometrical Product Specifications (GPS) Surface texture: Profile method Nominal characteristics of co
9、ntact (stylus) instruments DIN EN ISO 4287, Geometrical Product Specifications (GPS) Surface texture: Profile method Terms, definitions and surface texture parameters DIN EN ISO 4288, Geometrical Product Specifications (GPS) Surface texture: Profile method Rules and procedures for the assessment of
10、surface texture DIN EN ISO 11562, Geometrical Product Specifications (GPS) Surface texture: Profile method Metrological characteristics of phase correct filters DIN EN ISO 12085, Geometrical Product Specifications (GPS) Surface texture: Profile method Motif parameters DIN EN ISO 13565-1, Geometrical
11、 Product Specifications (GPS) Surface texture: Profile method Surfaces having stratified functional properties Part 1: Filtering and general measurement conditions DIN EN ISO 13565-2, Geometrical Product Specifications (GPS) Surface texture: Profile method Surfaces having stratified functional prope
12、rties Part 2: Height characterization using the linear material ratio curve DIN EN ISO 13565-3, Geometrical product specifications (GPS) Surface texture: Profile method Surfaces having stratified functional properties Part 3: Height characterization using the material probability curve DIN ISO 23519
13、:2015-124 Sintered 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 measurem
14、ent. 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 document (including any amendments) applies. ISO 4287, Geometrical
15、 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 properties Part 1: Filtering and general measurement conditions I
16、SO 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 Product Specifications (GPS) Surface texture: Profile method; Surfaces
17、 having stratified 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. DIN ISO 23519:2015-125 4 Symbols and units For the purposes of this document, th
18、e 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 Root mean square deviation of t
19、he 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 procedures. Because of the poro
20、sity 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 influence this value, because t
21、he 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. DIN ISO 23519:2015-126 6 Procedure The surface roughness shall be measured in accordance with ISO 13565-1, ISO 13565-2
22、 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, which is five times the cut-off value of 0,8 mm; NOTE Only in the case o
23、f 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 real statistical approach. c) use a probe with a radius of 2 m that will de
24、fine 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 state, but rather the addition between the surface state and the size of the
25、 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 between different materials and surface conditions is shown in Table 1. DIN
26、ISO 23519:2015-127 Table 1 Comparison of roughness of powder metallurgy (PM) material with wrought materials Material Surface profile BACacurve supporting surface Roughness Ra = 1,22 Rt = 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
27、 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 curve 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
28、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 described in ISO 4287 and ISO 13565-2. aBAC: Bearing area curve. 7 Expression of results The result is the surfac
29、e roughness, expressed as parameters Rk and Rpk, in micrometres. The result should be reported to the nearest 0,1 m. DIN ISO 23519:2015-128 Bibliography 1 ISO 3274, Geometrical Product Specifications (GPS) Surface texture: Profile method Nominal characteristics of contact (stylus) instruments 2 ISO
30、4288, Geometrical Product Specifications (GPS) Surface texture: Profile method Rules and procedures for the assessment of surface texture 3 ISO 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 DIN ISO 23519:2015-129
