1、February 2012 Translation by DIN-Sprachendienst.English price group 12No 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).I
2、CS 77.040.20!$yZd“1865565www.din.deDDIN EN 12680-3Founding Ultrasonic testing Part 3: Spheroidal graphite cast iron castingsEnglish translation of DIN EN 12680-3:2012-02Gieereiwesen Ultraschallprfung Teil 3: Gussstcke aus Gusseisen mit KugelgraphitEnglische bersetzung von DIN EN 12680-3:2012-02Fonde
3、rie Contrle par ultrasons Partie 3: Pices moules en fonte graphite sphrodalTraduction anglaise de DIN EN 12680-3:2012-02SupersedesDIN EN 12680-3:2003-06www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.2401.12 DIN EN 12680-3:2012-02
4、2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee CEN/TC 190 “Foundry technology” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Gieereiwesen (Foundry Practice Standards Comm
5、ittee), Working Committee NA 036-00-03 AA Prfverfahren fr Gusswerkstoffe. Amendments This standard differs from DIN EN 12680-3:2003-06 as follows: a) in Clause 3 “Terms and definitions”, “3.1 dross” has been added; b) in Subclause 4.1, NOTES 2 and 3 describing the typical differences between small a
6、nd large castings have been added; c) in Subclause 4.5, a new definition of core and rim zone has been added; d) Subclause 5.5.6.4 “Determination of the thickness of the dross layer in through-wall direction” has been included; e) Tables 1 and 3 for small castings have been added; f) in Table 2 for
7、large castings, based on the previous Table 1 of EN 12680-3:2003, a new severity level 01 and new values for severity level 1 have been added (no changes in severity levels 2, 3 and 4), severity level 5 has been deleted; g) in Table 4 for dross, based on the previous Table 2 of EN 12680-3:2003, a ne
8、w severity level 01 and new va ues for severity levels 1, 2, 3 and 4 have been added, severity level 5 has been deleted; h) Figure 5 has been added. Previous editions DIN EN 12680-3: 2003-06 lEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12680-3 November 2011 ICS 77.040.20 Supersedes EN 12680
9、-3:2003English Version Founding - Ultrasonic testing - Part 3: Spheroidal graphite cast iron castings Fonderie - Contrle par ultrasons - Partie 3: Pices moules en fonte graphite sphrodal Gieereiwesen - Ultraschallprfung - Teil 3: Gussstcke aus Gusseisen mit Kugelgraphit This European Standard was ap
10、proved by CEN on 15 October 2011. 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 references concerning such natio
11、nal 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 CEN member into its own langua
12、ge 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvi
13、a, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussel
14、s 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12680-3:2011: EEN 12680-3:2011 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Requirements .54.1 Order information 54.2 Extent of te
15、sting .54.3 Maximum permissible size of discontinuities 54.4 Personnel qualification .54.5 Wall section zones .55 Testing 65.1 Principles 65.2 Material .65.3 Equipment, coupling medium, time base range and sensitivity setting 65.4 Preparation of casting surfaces for testing 95.5 Test procedure .95.6
16、 Test report . 11Annex A (informative) Significant technical changes between this European Standard and the previous edition 21Bibliography . 22DIN EN 12680-3:2012-02 EN 12680-3:2011 (E) 3 Foreword This document (EN 12680-3:2011) has been prepared by Technical Committee CEN/TC 190 “Foundry Technolog
17、y”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2012, and conflicting national standards shall be withdrawn at the latest by May 2012. Attention is
18、 drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12680-3:2003. Within its programme of work, Technical Committee CEN/TC
19、 190 requested CEN/TC 190/WG 10 “Inner defects“ to revise the following standard: EN 12680-3, Founding Ultrasonic examination Part 3: Spheroidal graphite cast iron castings. This is one of three European Standards for ultrasonic testing. The other standards are: EN 12680-1, Founding Ultrasonic exami
20、nation Part 1: Steel castings for general purposes; EN 12680-2, Founding Ultrasonic examination Part 2: Steel castings for highly stressed components. Annex A provides details of significant technical changes between this European Standard and the previous edition. According to the CEN/CENELEC Inter
21、nal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxemb
22、ourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 12680-3:2012-02 EN 12680-3:2011 (E) 4 1 Scope This European Standard specifies the requirements for the ultrasonic testing of spheroidal graphite cast iron casti
23、ngs and the techniques for determining internal discontinuities by the pulse-echo technique. This European Standard does not apply to ultrasonic testing of the nodularity of spheroidal graphite cast irons. This European Standard does not apply to transmission technique. NOTE The transmission techniq
24、ue has insufficient sensitivity to detect the discontinuities found in spheroidal graphite cast iron castings and is used in exceptional cases only. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the editio
25、n cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 473, Non-destructive testing Qualification and certification of NDT personnel General principles EN 583-1, Non-destructive testing Ultrasonic examination Part 1: General prin
26、ciples EN 583-2, Non-destructive testing Ultrasonic examination Part 2: Sensitivity and range setting EN 583-5, Non-destructive testing Ultrasonic examination Part 5: Characterization and sizing of discontinuities EN 1330-4, Non-destructive testing Terminology Part 4: Terms used in ultrasonic testin
27、g EN 12223, Non-destructive testing Ultrasonic examination Specification for calibration block No. 1 EN 12668-1, Non-destructive testing Characterization and verification of ultrasonic examination equipment Part 1: Instruments EN 12668-2, Non-destructive testing Characterization and verification of
28、ultrasonic examination equipment Part 2: Probes EN 12668-3, Non-destructive testing Characterization and verification of ultrasonic examination equipment Part 3: Combined equipment EN ISO 7963, Non-destructive testing Ultrasonic testing Specification for calibration block No. 2 (ISO 7963:2006) 3 Ter
29、ms and definitions For the purposes of this document, the terms and definitions given in EN 1330-4 and the following apply. 3.1 dross accumulation of fine slag particles (oxides, sulphides, etc.) in the rim zone of castings NOTE In smaller castings, dross is usually not detected by ultrasonic testin
30、g. DIN EN 12680-3:2012-02 EN 12680-3:2011 (E) 5 4 Requirements 4.1 Order information The following information shall be available at the time of enquiry and order (see also EN 583-1): the areas of the casting and the number or percentage of castings to which the ultrasonic testing require-ments appl
31、y; the severity levels for small castings in accordance with Table 1 and if applicable Table 3, or for large castings Table 2 and if applicable Table 4, to be applied to the various areas of the casting; requirements for a written test procedure. NOTE 1 Severity levels in Tables 1 and 3 as well as 2
32、 and 4 can be chosen differently. NOTE 2 Small castings are typically produced under serial conditions, e.g. automatic moulding lines, with a mass up to 500 kg. NOTE 3 Large castings are typically hand moulded, with a mass higher than 500 kg. 4.2 Extent of testing The areas of the casting to be test
33、ed shall be agreed. This agreement shall state how these areas are to be tested, i.e. point testing or scanning, and in which directions. NOTE These areas should be preferably indicated on the casting drawing. For wall thicknesses outside of the range 10 mm to 500 mm, agreement shall be made between
34、 the parties concerned on the test procedure and also on the recording and acceptance levels. 4.3 Maximum permissible size of discontinuities Unless otherwise agreed between the parties concerned, the maximum permissible sizes of discontinuities shall not exceed those of the severity level given in
35、either Table 1 resp. 2 and/or Table 3 resp. 4. 4.4 Personnel qualification Unless otherwise agreed, testing shall be performed by personal, qualified in accordance with EN 473 or by a certification scheme which is considered to be equivalent. 4.5 Wall section zones The wall section shall be divided
36、into zones as shown in Figure 1. For wall thickness equal to or less than 10 mm the total wall thickness shall be considered as rim zone. Unless otherwise agreed these wall sections shall relate to the dimensions of the casting in the “as delivered” condition. When a discontinuity is located simulta
37、neously in both, the rim zone and the core zone, the following applies: 50 % in the rim zone, the specified area of the largest discontinuity for the rim zone shall be doubled; 200 200 200 200 Percent of wall area % 15 20 25 30 Largest discontinuity in the rim zone a,bcm c3 5 8 6 10 10 10 20 20 Larg
38、est discontinuity in the core zone cm c25 50 100 100 150 200 150 200 300 200 Total area of discontinuities as percentage of tested surface % c10 10 10 10 15 15 15 20 20 15 20 30 aFor dross see Table 4. bRim zone, see Figure 1. cNo indications exceeding the limits given in Table 6. DI N EN 12680- 3:
39、2012- 01 EN 12680-3:2011 (E) 14 Table 3 Maximum permissible indicated thickness of dross layer for areas to be left un-machined Small castings Mark Severity level VU1.2 VU2.2 VU3.2 VU4.2 VU5.2 Percentage of wall thickness a5 10 15 20 aNo indications exceeding the limits given in Table 6. Table 4 Max
40、imum permissible indicated thickness of dross layer for areas to be left un-machined Large castings Mark Severity level 01 1 2 3 4 Percentage of wall thickness a10 15 20 25 aNo indications exceeding the limits given in Table 6. DI N EN 12680- 3: 2012- 01 EN 12680-3:2011 (E) 15 Table 5 Requirements f
41、or ultrasonic testing suitability Wall thickness of the casting in the tested area Smallest flat-bottomed hole diameter detectable according to 5.2 mm mm 10 to 20 3 20 to 100 5 100 to 250 8 250 to 500 10 Table 6 Ultrasonic indications to be evaluated Wall thickness of the casting in the tested area
42、Evaluation limits Reduction of back-wall echo Smallest flat-bottomed hole diameter detectable according to 5.2 Echo height above noise level amin. min.mm dB mm dB 10 to 20 12 3 6 20 to 100 20 5 100 to 250 8 12 250 to 500 10 aOnly for areas where no back-wall echo is obtained due to the casting geome
43、try. DIN EN 12680-3:2012-02 EN 12680-3:2011 (E) 16 Key 1 rim zone 2 core zone t wall thickness a t/5 (min. 5 mm, max. 30 mm) Figure 1 Division of wall section into zones DIN EN 12680-3:2012-02 EN 12680-3:2011 (E) 17 Key Y1 angle of refraction cin spheroidal graphite cast iron X sound velocity of tra
44、nsverse wave ctransin metres per second Y2 nominal angle of refraction in steel alongitudinal and transverse wave simultaneously Figure 2 Determination of the nominal angle of refraction in spheroidal graphite cast iron for an angle-beam probe with known angle of refraction in steel DIN EN 12680-3:2
45、012-02 EN 12680-3:2011 (E) 18 tA=2tanarcc where cis the angle of refraction in the casting; A is the distance between the probe indexes of the angle-beam probes at maximum signal; t is the wall thickness. Key 1 angle beam probes of same type 2 test piece or reference block Figure 3 Determination of
46、the angle of refraction in spheroidal graphite cast iron using angle-beam probes DIN EN 12680-3:2012-02 EN 12680-3:2011 (E) 19 Key ascanning position A bscanning position B cA scan from scanning position A dA scan from scanning position B Dimension in through-wall direction d = t - (s1+ s2) where s1
47、, s2 are the sound path lengths; t is the wall thickness. Figure 4 Determination of the dimensions of discontinuities in through-wall direction using normal probes DIN EN 12680-3:2012-02 EN 12680-3:2011 (E) 20 Key t wall thickness s1 sound path length d thickness of the dross layer Figure 5 Determin
48、ation of the thickness of the dross layer in through-wall direction using normal probes DIN EN 12680-3:2012-02 EN 12680-3:2011 (E) 21 Annex A (informative) Significant technical changes between this European Standard and the previous edition Table A.1 Significant technical changes between this European Standard and the previous edition Clause/Paragraph/Ta
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