1、BSI Standards PublicationBS EN 10359:2015Laser welded tailored blanks Technical delivery conditionsBS EN 10359:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 10359:2015.The UK participation in its preparation was entrusted to TechnicalCommittee ISE/109, Co
2、ated and Uncoated Flat Products to be Usedfor Cold Forming.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The Br
3、itish Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 82802 7ICS 77.140.50Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July
4、2015.Amendments issued since publicationDate Text affectedBS EN 10359:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10359 July 2015 ICS 77.140.50 English Version Laser welded tailored blanks - Technical delivery conditions Flans rabouts laser - Conditions techniques de livraison Laserstra
5、hlgeschweite Tailored Blanks aus Stahlfeinblech - Technische Lieferbedingungen This European Standard was approved by CEN on 20 June 2015. 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 nation
6、al standard without any alteration. Up-to-date lists and bibliographical references 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 versi
7、on in any other language made by translation under the responsibility of a CEN 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, Cz
8、ech 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, Switzerland, Turkey and United Kingdom.
9、EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10359:2015 E
10、BS EN 10359:2015EN 10359:2015 (E) 2 Contents Page European foreword .3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Requirements .4 5 Tolerances on dimensions and shape 4 6 Destructive testing of weld joints 5 6.1 Cup test .5 6.2 Cross section .5 Bibliography . 14 BS EN 10359:2015
11、EN 10359:2015 (E) 3 European foreword This document (EN 10359:2015) has been prepared by Technical Committee ECISS/TC 109 “Coated and uncoated flat products to be used for cold forming”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standar
12、d, either by publication of an identical text or by endorsement, at the latest by January 2016 and conflicting national standards shall be withdrawn at the latest by January 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CE
13、N and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus,
14、 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, Switzerland, Turkey and the United Ki
15、ngdom. BS EN 10359:2015EN 10359:2015 (E) 4 1 Scope This European Standard describes the requirements for laser welded tailored blanks made of alloyed and unalloyed steels, of uniform or different steel grades and with or without metallic and/or organic coatings, having uniform or different sheet thi
16、ckness. It applies only to the (Tailored Blanks) as-supplied condition of tailored blanks. After the welding process, tailored blanks are further processed to pressed parts by forming operations under the responsibility of the processor. In the design of the component due consideration should be giv
17、en to the fact that the weld seam is less formable in comparison to the base material. 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
18、 undated references, the latest edition of the referenced document (including any amendments) applies. EN 10131, Cold rolled uncoated and zinc or zinc-nickel electrolytically coated low carbon and high yield strength steel flat products for cold forming Tolerances on dimensions and shape EN 10143, C
19、ontinuously hot-dip coated steel sheet and strip Tolerances on dimensions and shape ISO 2768-1, General tolerances Part 1: Tolerances for linear and angular dimensions without individual tolerance indications 3 Terms and definitions For the purposes of this document, the following term and definitio
20、n applies. 3.1 tailored blanks laser welded metal sheets of uniform and/or different thickness and/or uniform or different steel grades, both with and without surface coating 4 Requirements As far as the properties of the components are concerned, the general rules of engineering apply. The suitabil
21、ity of tailored blanks for the processes of the customer is guaranteed in case of appropriate execution of the welding seam, suitable positioning of weld seam in the part to be formed and appropriate lay out of sheet thicknesses and steel grades under taking into consideration the requirements of kn
22、own further processing steps. The criteria laid down in Table 1 have proved to be a practical basis for ordering. Additional specific deviations are admissible and have to be agreed upon at the time of ordering. 5 Tolerances on dimensions and shape Regarding tolerances on dimensions and shape the ag
23、reements of EN 10131 and EN 10143 shall apply for cold rolled and surface coated wide coils, cut to length sheets and slit coils, which are used for the manufacturing tailored blanks. The relevant tolerance classes for width, flatness and thickness have to be agreed upon between producer of tailored
24、 blank and steel producer. For the general tolerances regarding lengths, angles, coaxiality and symmetry, the precision class c according to ISO 2768-1 shall apply. BS EN 10359:2015EN 10359:2015 (E) 5 If not all edges of the blank were cut, the definition of the dimension has to be according to EN 1
25、0143 and EN 10131 also. Specific requirement and other beyond that valid special customer agreement have to be agreed upon between producer of tailored blank / steel producer and customer. 6 Destructive testing of weld joints 6.1 Cup test Destructive testing of weld joints with cup test is considere
26、d as best practice procedure. The evaluation of weld quality is done according to the pictures in Table 2. Frequency of the cup test is minimum once a run. 6.2 Cross section Samples shall be taken minimum 5 mm from both ends of welds. For measurements, Table 3 applies. Table 1 Requirements Dimension
27、s, surface Criterion Figures Assessment Frequency Shape inspection (Tolerance) Tolerances for linear and angular dimensions without individual tolerance indications according ISO 2768-1, class c, EN 10143, EN 10131 or customer specification Shape inspection (Method of measurement) Master sample (Ini
28、tial sample): Reference points have to be agreed with the customer. Production: measuring of the influential dimensions. Initial parts or master sample for PSWaProduction sample each run Flatness of the entire blank Figure 1 Deviation h guaranteed acc. to EN 10131 and EN 10143. Furthermore, the “pro
29、cess ability” criterion shall apply. Tighter specification should be agreed between customer and supplier. Initial parts or master sample for PSWa. Production samples each run. Visual. Burr of the entire laser welded blank Customer specification. Production samples each run. Visual. Surface quality
30、of laser welded blanks According to relevant technical delivery conditions for flat products. Production samples each run. Visual. Oiling of tailored blanks The entire blank shall be free from corrosion products. Oil type and amount of oil at time of steel strip production acc. to customer specifica
31、tion. More than 1,5 g/m2is not state of the art due to process ability Initial parts or master sample for PSWa. Visual each run. BS EN 10359:2015EN 10359:2015 (E) 6 Offset of sheets Figure 13 maximal Offset 1,5 mm Initial parts or master sample for PSWa. Production sample one each run. Requirements
32、on weld seam Criterion Figures Assessment Frequency Cracks / Pores / Inclusions / Craters / Lack of fusion Pores, Inclusions: Maximum size of imperfection 0,3 x t2Pore nests: f 0,7 %. No cracks, craters or lack of fusion are allowed. f = surface of pores measured over a length of 100 mm along the we
33、ld (parallel cross section) Checked by online-systems. Additional minimum one destructive test (cross section) once a year. Hardness in the area of the weld and HAZ Hardness depends on the defined steel grades. Initial parts or master sample for PSW (If required). Spatter Scale and smoke residues as
34、 well as welding spatter shall not negatively affect the processability nor the downstream processes Initial parts or master sample for PSW. Production samples each run. Burning of zinc coating (total) The maximum width of the entire zinc-free zone is 3 mm for t1 2 mm, and 1+ t1for t 2 mm Customer s
35、pecification Undercut (Definition: un-fused edge that reduces the carrying cross section) Figure 2 t2 1 mm: h 0,1 mm; t2 1 mm: h 0,1 x t2 Checked by online-systems. Additional minimum one destructive test (cross section) once a year. Excess weld metal Figure 3 t2 1 mm:h 0,1 mm;t2 1 mm: h 0,1 x t2 Ch
36、ecked by online-systems. Additional minimum one destructive test (cross section) once a year. Excessive root penetration Figure 4 t2 1 mm:h 0,1 mm,t2 1 mm: h 0,1 x t2Checked by online-systems. Additional minimum one destructive test (cross section) once a year. Upper weld concavity Figure 5 t2 1 mm:
37、h 0,1 mm,t2 1 mm: h 0,1 x t2Checked by online-systems. Additional minimum one destructive test (cross section) once a year. Root concavity Figure 6 t2 1 mm:h 0,1 mm,t2 1 mm: h 0,1 x t2 Checked by online-systems. Additional minimum one destructive test (cross section) once a year. Weld sagging Figure
38、 7 t2 1 mm:h 0,1 mm,t2 1 mm: h 0,1 x t2Checked by online-systems. Additional minimum one destructive test (cross section) once a year. BS EN 10359:2015EN 10359:2015 (E) 7 Mismatch Figure 8 and 9 negative mismatch: t2 1 mm:h 0,1 mm,t2 1 mm: h 0,1 x t2positive mismatch: t2 1 mm: h 0,2 mm, t2 1 mm: h 0
39、,2 x t2Furthermore, the processability criterion shall apply. Checked by online-systems. Additional minimum one destructive test (cross section) once a year. Weld cross section Figure 10 The remaining cross section due to weld defects (Undercut, Root concavity, Upper weld concavity, negative mismatc
40、h) should not be smaller than: t2 1mm: g 0,80 x t2t2 1 mm: g 0,80 x t2Beginning/end of weld Figure 12 At the beginning and end of the weld areas with a max. length of 2 mm each may occur where the laser beam is without effect. Furthermore the “processability“ criterion shall apply. Production sample
41、 each run. Visual Lack of penetration Figure 11 Lack of penetration is not allowed Checked by online-systems. Additional minimum one destructive test (cross section) once a year. Testing Criterion Figures Assessment Frequency Testing of weld seam (non- destructive) Figure 12 Each tailored blank is t
42、ested with appropriate and ensured test procedures (online). Additional visual inspection is possible. Up to max. 5 mm at the beginning and end of the weld cannot be monitored by state-of-the-art online test procedures. 100 % by online- system Weld seam testing (mechanical and technological) for the
43、 series delivery Table 2 Using ensured test procedures with appropriate testing frequency (offline), e.g. the cup test according to EN ISO 20482 or other appropriate standards Once per run Process assurance by traceability Traceability from stack label back to the batch number of steel sheet or coil
44、. Packaging Criterion Figures Assessment Frequency Packaging As specified by the customer and complying with “stacking deviation” and “stacking height deflection” as defined below. Each stack Visual Stack deviation Figure 14 h 5,0 mm provided that the palette has been designed adequately Each stack
45、BS EN 10359:2015EN 10359:2015 (E) 8 Stack height deflection (deflection of tailored blank on top) Figure 15 and 16 The height deviation h of the dimpled blanks in the Stack shall be less than 30 mm compared to the undimpled blank whenever it is technically feasible with regard to blank geometry and
46、design of palette, Furthermore the “processability” criterion shall apply. Each stack Visual t1= thickness of thicker sheet t2 = thickness of thinner sheet h = deviation in mm g = remaining weld thickness f = porosity projection fraction aPSW = Part Submission Warrant. BS EN 10359:2015EN 10359:2015
47、(E) 9 Figure 1 Flatness of the blank Figure 2 Undercut Figure 3 Excess weld metal Figure 4 Excess root penetration Figure 5 Upper weld concavity Figure 6 Root concavity Figure 7 Weld sagging Figure 8 Positive mismatch Figure 9 Negative mismatch with weakening of the weld section Figure 10 Weld cross
48、 section Key (from Figure 1 to Figure 10) t1thickness of thick sheet t2thickness of thin sheet (dimpled sheet) h deviation g remaining weld thickness BS EN 10359:2015EN 10359:2015 (E) 10 Figure 11 Lack of penetration Figure 12 Beginning/end of weld seam Figure 13 Offset of the sheets BS EN 10359:201
49、5EN 10359:2015 (E) 11 Figure 14 Stack deviation Figure 15 Stack height deflection Figure 16 Stack height deflection Key (from Figure 14 to Figure 16) t1thickness of thick sheet t2thickness of thin sheet (dimpled sheet) h deviation 1 palette BS EN 10359:2015EN 10359:2015 (E) 12 Table 2 Weld seam testing Results Welding OK Welding OK If the crack is beside the weld in the heat affected zone the weld is good. In case of doubt a cross section has to be done. Judgement
