1、March 2014 Translation by DIN-Sprachendienst.English price group 9No 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 0
2、1.040.17; 17.040.20!%,3“2099316www.din.deDDIN EN 10049Measurement of roughness average Ra and peak count RPc on metallicflat products;English version EN 10049:2013,English translation of DIN EN 10049:2014-03Messung des arithmetischen Mittenrauwertes Ra und der Spitzenzahl RPc anmetallischen Flacherz
3、eugnissen;Englische Fassung EN 10049:2013,Englische bersetzung von DIN EN 10049:2014-03Mesure de la rugosit moyenne Ra et du nombre de pics RPc sur les produits platsmtalliques;Version anglaise EN 10049:2013,Traduction anglaise de DIN EN 10049:2014-03SupersedesDIN EN 10049:2006-02www.beuth.deDocumen
4、t comprises 14 pagesIn case of doubt, the German-language original shall be considered authoritative.02.14 DIN EN 10049:2014-03 2 A comma is used as the decimal marker. National foreword This document (EN 10049:2013) has been prepared by Technical Committee ECISS/TC 109 “Coated and uncoated flat pro
5、ducts to be used for cold forming” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the Normenausschuss Eisen und Stahl (Iron and Steel Standards Committee), Working Committee NA 021-00-01-01 UA Flacherzeugnisse aus Stahl zum Kaltumformen. Amendments This sta
6、ndard differs from DIN EN 10049:2006-02 as follows: a) an optical measurement system has been included in 3.3, Note 1; b) the definition of the centre line in 3.8 has been reformulated; c) explanatory remarks concerning the optical measurement system have been included in Clause 4; d) in Table 1, th
7、e maximum sampling spacing for application group 1 has been changed from 1,5 m to 1,6 m; e) the standard has been editorially revised. Previous editions DIN EN 10049: 2006-02 National Annex NA (informative) Bibliography DIN EN ISO 5436-1, Geometrical product specifications (GPS) Surface texture: Pro
8、file method; Measurements standards Part 1: Material measures DIN EN ISO 16610-21, Geometrical product specifications (GPS) Filtration Part 21: Linear profile filters: Gaussian filters EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10049 November 2013 ICS 01.040.17; 17.040.20 Supersedes EN 100
9、49:2005 English Version Measurement of roughness average Ra and peak count RPc on metallic flat products Mesure de la rugosit moyenne Ra et du nombre de pics RPc sur les produits plats mtalliques Messung des arithmetischen Mittenrauwertes Ra und der Spitzenzahl RPc an metallischen Flacherzeugnissen
10、This European Standard was approved by CEN on 29 August 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical refe
11、rences concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CE
12、N member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedoni
13、a, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPIS
14、CHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10049:2013: E 2 ContentsPage Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and de
15、finitions .4 4 Measuring instrument .7 4.1 General 7 4.2 Pick-up system .7 4.3 Evaluation profile filter 9 4.4 Checking of the measuring instrument .9 5 Sample preparation 10 6 Measuring conditions . 10 6.1 General . 10 6.2 Disputes . 11 7 Test report . 11 Bibliography . 12 DIN EN 10049:2014-03 EN 1
16、0049:2013 (E) 3 Foreword This document (EN 10049:2013) has been prepared by Technical Committee ECISS/TC 109 “Flat products for cold working - Qualities, dimensions, tolerances and specific tests”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a natio
17、nal standard, either by publication of an identical text or by endorsement, at the latest by May 2014, and conflicting national standards shall be withdrawn at the latest by May 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights
18、. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 10049:2005. The whole document was technically revised. The European Committee for Iron and Steel Standardization (ECISS) has given Technical Committee 109 (Secretariat Franc
19、e) the task to prepare a European Standard on the measuring of roughness as a revision of EN 10049:2005. The reason for the existence of this European Standard is that general roughness measurement rules as described in ISO standards (see Clause 2) are not practical for metallic flat products for th
20、e following reasons: - the practical use of EN ISO 4288 is not convenient for flat products, because the choice of the cut-off (c) is dependent on the Ra to be measured; the product range is quite wide and the transition point for Ra is 2 m in EN ISO 4288 (EN ISO stipulates a cut-off (c) of 0,8 mm f
21、or Ra 2m); - in the automotive industry, the use of a cut-off (c) of 2,5 mm is based on requirements related to paint appearance. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria,
22、 Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, S
23、witzerland, Turkey and the United Kingdom. DIN EN 10049:2014-03 EN 10049:2013 (E) 4 1 Scope This European Standard defines the measurement conditions for surface roughness parameters of metallic flat products, both uncoated (cold and hot rolled pickled steel) and coated with metallic coatings (e.g.
24、zinc, aluminium, tin, chromium) (see 3.1). 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of t
25、he referenced document (including any amendments) applies. EN ISO 5436-1, Geometrical Product Specifications (GPS) Surface texture: Profile method; Measurement standards Part 1: Material measures (ISO 5436-1) EN ISO 16610-21, Geometrical product specifications (GPS) Filtration Part 21: Linear profil
26、e filters: Gaussian filters (ISO 16610-21) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 application group products 3.1.1 application group 1 product metallic flat product mainly used in the automotive industry, uncoated or coated with meta
27、llic coatings (e.g. zinc, aluminium) 3.1.2 application group 2 product metallic flat product mainly used for applications other than those of the automotive industry (e.g. tinplate or chromium coated steel for packaging, uncoated or coated cold rolled steel, pickled hot rolled steel) 3.2 surface pro
28、file profile that results from the intersection of the real surface by a specified plane Note 1 to entry: See EN ISO 4287. 3.3 primary profile (P-profile) digital form of the surface profile after sampling and applying a profile filter s to suppress very short wavelength components due to noise and
29、vibrations Note 1 to entry: The measuring device is a stylus instrument conforming to EN ISO 3274 or an optical roughness measurement system. Note 2 to entry: The profile filter s is referred to in EN ISO 16610-21. 3.4 roughness profile (R-profile) profile derived from the primary profile by suppres
30、sing the long wave components, using the profile filter c DIN EN 10049:2014-03 EN 10049:2013 (E) 5 Note 1 to entry: See EN ISO 3274 and EN ISO 16610-21. 3.5 c profile filter filter determining the intersection between the roughness and waviness components 3.6 s profile filter filter determining the
31、intersection between the roughness and the even shorter wave components present in a surface 3.7 transmission band range of wavelengths between the profile filters s and c Note 1 to entry: The transmission characteristic is shown in Figure 1. Key X-axis wavelength (logarithmic scale) Y-axis transmis
32、sion ratio 1 roughness 2 waviness Figure 1 Transmission characteristic 3.8 centre line of the roughness profile centre line of the roughness profile separating the enclosed area of the roughness profile into two equal areas below and above this line Note 1 to entry: See EN ISO 16610-21. 3.9 evaluati
33、on length lm length in the direction of the X-axis used for assessing the profile under evaluation 3.10 travel length lt length in the direction of the X-axis physically used by the instrument Note 1 to entry: Some instruments may require a travel length lt longer than the evaluation length lm becau
34、se of start and end effects. DIN EN 10049:2014-03 EN 10049:2013 (E) 6 3.11 roughness average Ra arithmetic mean of the absolute ordinates values Z(x) of the roughness profile Note 1 to entry: Ra is expressed in micrometer. Note 2 to entry: A schematic representation of Ra is given in Figure 2. Key 1
35、 centre line Figure 2 Schematic representation of the roughness average Ra 3.12 peak count RPc number of profile peaks over the full evaluation length lm Note 1 to entry: RPc is expressed as an absolute number per cm. Note 2 to entry: For the purpose of this standard, the height discrimination is pe
36、rformed by consecutively intersecting a lower section line c2(in upwards direction) and an upper section line c1(in downwards direction). See Figure 3. Note 3 to entry: For the purpose of this standard, RPc is calculated over the full evaluation length lm. Key 1 centre line Figure 3 Peak count RPc D
37、IN EN 10049:2014-03 EN 10049:2013 (E) 7 3.13 surface types 3.13.1 stochastic surface surface not showing a lateral pattern Note 1 to entry: Stochastic surfaces can be generated by mill rolls obtained e.g. by grinding, Shot Blast Texturing (SBT), Electro Discharge Texturing (EDT), Electro Chemical De
38、position (ECD), some types of Electron Beam Texturing (EBT), chemical processes (e.g. pickling). Note 2 to entry: Isotropic surface is a synonym of stochastic surface. 3.13.2 non-stochastic surface surface showing a typical lateral pattern Note 1 to entry: Non-stochastic surfaces can be generated by
39、 mill rolls obtained e.g. by Laser Texturing (LT) and Electron Beam Texturing (EBT). Note 2 to entry: A lateral pattern is clearly observable by using a simple optical magnifier, with e.g. a magnification x 30. Note 3 to entry: Non-isotropic surface is a synonym of non-stochastic surface. 4 Measurin
40、g instrument 4.1 General The instrument to use is either a stylus instrument conforming to EN ISO 3274 or an optical roughness measurement system. The device is generally composed of a measuring head, a traverse unit and an evaluation device. When using an optical roughness measurement system the ca
41、libration shall assure that the measured values are aligned with the reference stylus method values. All the following subclauses are related to measurements performed using the stylus instrument. For such an instrument, the measuring head is usually called pick-up system. 4.2 Pick-up system The dat
42、um system is the reference system for the roughness measurement (see Figure 4). A double-skid system is used for practical measurements (see Figure 5). The skid dimensions are as follows: Rs,x: 50 mm; Rs,y: 3 mm; SA: 4.5 mm; AB: 13 mm. By mutual agreement, a single skid system can also be used (see
43、Figure 6). DIN EN 10049:2014-03 EN 10049:2013 (E) 8 Figure 4 Datum system (either table or pick-up moving) Key S position of the stylus tip A, B positions of the skids with the following radii: Rs,x : skid radius in the x direction; Rs,y : skid radius in the y direction. SA horizontal distance betwe
44、en the stylus tip and the centre of the first skid AB horizontal distance between the centres of the skids Figure 5 Double-skid system Figure 6 Example of one type of single skid system The stylus has a cone shape with a cone angle and a tip radius r with the following values: : 90 (+5 / -10); r : 5
45、 1 m. DIN EN 10049:2014-03 EN 10049:2013 (E) 9 Key cone angle r tip radius Figure 7 Stylus tip 4.3 Evaluation profile filter According to EN ISO 16610-21, a gaussian filter is used to separate roughness and waviness (see Figure 1). 4.4 Checking of the measuring instrument The error-free functioning
46、of the whole measuring system shall be regularly checked by means of a suitable calibrated roughness standard specimen of type D according to EN ISO 5436-1 (see Figure 8 and Figure 9). Figure 8 Example of roughness standard specimen of type D (EN ISO 5436-1) DIN EN 10049:2014-03 EN 10049:2013 (E) 10
47、 Dimensions in millimetres Figure 9 Measuring plan for the calibration 5 Sample preparation Samples shall be flat, i.e. the maximum bend degree should not exceed 4 mm over a length of 200 mm. They shall be clean and free from any features or other defects that may disturb the roughness measurement.
48、They shall be degreased before measurement. The samples for measurement shall be taken at least at 40 mm from the edge of the surface to be checked. 6 Measuring conditions 6.1 General Measurements on the surface to be checked shall be performed using the following conditions (see Table 1). DIN EN 10049:2014-03 EN 10049:2013 (E) 11 Table 1 Measuring conditions Field of application Unit Application group 1aApplication group 2a Cut-off c mm 2,5 0,8bSection line c1m + 0,5 c Secti
