BS EN 4677-001-2012 Aerospace series Welded and brazed assemblies for aerospace construction Joints of metallic materials by electron beam welding Quality of welded assemblies《航空航天.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 4677-001:2012Aerospace series Weldedand brazed assemblies foraerospace construction Joints of metallic materials byelectron beam weldingPart 001: Quality of welded assembli

2、esBS EN 4677-001:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 4677-001:2012.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/61, Metallic materials for aerospace purposes.A list of organizations represented on this committe

3、e 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 British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 69137 9ICS 25.160.40; 49

4、.035Compliance 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 August 2012.Amendments issued since publicationDate Text affectedBS EN 4677-001:2012EUROPEAN STANDARD NORME

5、EUROPENNE EUROPISCHE NORM EN 4677-001 May 2012 ICS 25.160.40; 49.035 English Version Aerospace series - Welded and brazed assemblies for aerospace construction - Joints of metallic materials by electron beam welding - Part 001: Quality of welded assemblies Srie arospatiale - Assemblages souds et bra

6、ss pour constructions arospatiales - Assemblages de matriaux mtalliques souds par faisceau dlectrons - Partie 001: Qualit des assemblages souds Luft- und Raumfahrt - Schwei- und Ltverbindungen fr die Luft- und Raumfahrt - Verbindungen metallischer Werkstoffe mittels Elektronenstrahlschweien - Teil 0

7、01: Qualitt der Schweiverbindungen This European Standard was approved by CEN on 16 January 2010. 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

8、-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 version in any other language made by translat

9、ion 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, Czech Republic, Denmark, Estonia, Finland,

10、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 EUROPISCHE

11、S KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4677-001:2012: EBS EN 4677-001:2012EN 4677-001:2012 (E) 2 Contents Page Foreword 31 Scope 42 Normative r

12、eferences 43 Terms and definitions . 53.1 General 53.1.1 Electron beam welding 53.2 Technical terms . 53.2.1 Welding parameters 53.2.2 Other technical terms 73.3 General terms . 94 Weldability 114.1 Notion of weldability 114.2 Degrees of weldability . 115 Symbols and acronyms 116 General requirement

13、s 126.1 Weld classification 126.1.1 Manufacturing new parts 126.1.2 Repair 126.2 Welding machines . 126.3 Operators and setters . 126.3.1 Training . 126.3.2 Qualification . 136.4 Responsibility 157 Technical requirements for manufacturing new parts 157.1 Materials . 157.2 Preparation of welding proc

14、edure specification 157.2.1 Generality of procedure 157.2.2 Welding procedure specification . 167.2.3 Qualification tests 177.3 Process monitoring and inspection in manufacture . 257.3.1 General 257.3.2 Manufacturing data sheet . 257.3.3 Follow up and inspection of manufacturing conditions 257.3.4 T

15、esting and inspection during manufacturing . 267.3.5 Sentencing of test specimens 277.4 Acceptance of welded assemblies 287.4.1 Requirements . 287.4.2 Acceptance criteria 297.4.3 Sentencing of assemblies . 297.4.4 Repair of non-conforming welded joints . 298 Technical repair requirements . 299 Speci

16、al case . 30BS EN 4677-001:2012EN 4677-001:2012 (E) 3 Foreword This document (EN 4677-001:2012) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this S

17、tandard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the lat

18、est by November 2012, and conflicting national standards shall be withdrawn at the latest by November 2012. Attention is 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 al

19、l 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, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hun

20、gary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 4677-001:2012EN 4677-001:2012 (E) 4 1 Scope This European Standard defines the rules to be satisfi

21、ed to ensure the quality of joints of metallic materials by electron beam welding (reference number 51 according to EN ISO 4063). It applies unreservedly to the manufacturing of new parts or for repair, these operations being under the responsibility of an approved manufacturer or supplier. The fina

22、l responsibility is with the design authority 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 o

23、f the referenced document (including any amendments) applies. EN 875, Destructive tests on welds in metallic materials Impact tests Test specimen location, notch orientation and examination EN 895, Destructive tests on welds in metallic materials Transverse tensile test EN 910, Destructive tests on

24、welds in metallic materials Bend tests EN 4632-001, Aerospace series Welded and brazed assemblies for aerospace constructions Weldability and brazeability of materials Part 001: General requirements EN 4632-002, Aerospace series Welded and brazed assemblies for aerospace constructions Weldability an

25、d brazeability of materials Part 002: Homogeneous assemblies aluminium and aluminium alloys EN 4632-003, Aerospace series Weldability and brazeability of materials in aerospace constructions Part 003: Welding and brazing of homogeneous assemblies of unalloyed and low alloy steels EN 4632-004, Aerosp

26、ace series Welded and brazed assemblies for aerospace constructions Weldability and brazeability of materials Part 004: Homogeneous assemblies highly alloyed steels EN 4632-005, Aerospace series, Weldability and brazeability of materials in aerospace constructions Homogeneous assemblies of heat resi

27、sting Ni or Co base alloys EN 4632-006, Welded and brazed assemblies for aerospace constructions Weldability and brazeability of materials Part 006: Homogeneous assemblies titanium alloys EN ISO 4063, Welding and allied processes Nomenclature of processes and reference numbers (ISO 4063) EN ISO 5817

28、, Welding Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) Quality levels for imperfections (ISO 5817) EN ISO 6507-1, Metallic materials Vickers hardness test Part 1: Test method (ISO 6507-1) EN ISO 6947, Welding and allied processes Welding positions (ISO 694

29、7) EN ISO 10042, Welding Arc-welded joints in aluminium and its alloys Quality levels for imperfections (ISO 10042) EN ISO 14731, Welding coordination Tasks and responsibilities (ISO 14731) EN ISO 14744-1, Welding Acceptance inspection of electron beam welding machines Part 1: Principles and accepta

30、nce conditions (ISO 14744-1) BS EN 4677-001:2012EN 4677-001:2012 (E) 5 EN ISO 14744-2, Welding Acceptance inspection of electron beam welding machines Part 2: Measurement of accelerating voltage characteristics (ISO 14744-2) EN ISO 14744-3, Welding Acceptance inspection of electron beam welding mach

31、ines Part 3: Measurement of beam current characteristics (ISO 14744-3) EN ISO 14744-6, Welding Acceptance inspection of electron beam welding machines Part 6: Measurement of stability of spot position (ISO 14744-6) EN ISO 15609-3, Specification and qualification of welding procedures for metallic ma

32、terials Welding procedure specification Part 3: Electron beam welding EN ISO 17659:2004, Welding Multilingual terms for welded joints with illustrations (ISO 17659:2002) ISO 857-1:1998, Welding and allied processes Vocabulary Part 1: Metal welding processes ISO 4969, Steel Macroscopic examination by

33、 etching with strong mineral acids ISO 22826, Destructive tests on welds in metallic materials Hardness testing of narrow joints welded by laser and electron beam (Vickers and Knoop hardness tests) ISO 24394, Welding for aerospace applications Qualification test for welders and welding operators Fus

34、ion welding of metallic components ISO/TR 25901, Welding and related processes Vocabulary 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 857-1:1998 and EN ISO 17659:2004 and the following apply. 3.1 General 3.1.1 Electron beam welding fusion welding

35、 process using the transformation of the kinetic energy of beam electrons into thermal energy when they strike the material Note 1 to entry: The electrons are obtained from a cathode heated under a secondary vacuum (1 Pa to 10-4Pa). Note 2 to entry: The welding operation may be performed under a con

36、trolled atmosphere, generally under a primary vacuum (100 Pa to 1 Pa) or secondary vacuum. 3.2 Technical terms 3.2.1 Welding parameters 3.2.1.1 run-out interval encompassing all geometrical irregularities of the joint plane Note 1 to entry: This interval is measured on the detail parts, positioned i

37、n their welding setup, and is used as a reference to determine the minimum width of the weld zone. 3.2.1.2 beam centering alignment of the beam axis on the joint plane BS EN 4677-001:2012EN 4677-001:2012 (E) 6 3.2.1.3 beam deflection controlled movement of the beam in relation to the physical axis o

38、f the gun 3.2.1.4 level distance difference in level (height) between two detail parts at the joint plane 3.2.1.5 firing (working) distance distance between the impact point of the beam on detail parts and a reference surface linked to the gun or the machine (example: middle of the closest focusing

39、coil of the detail part, electron gun base) 3.2.1.6 specific welding energy defined by ratio between the beam power over the welding speed, multiplied by 60 0001(cm/min)60(Ampere)(Volt)VIU(in kJ/cm) 3.2.1.7 focusing current intensity intensity of the current crossing the focusing coil enabling elect

40、ron beam concentration on a point called the focusing point Note 1 to entry: The intensity may be constant or modulated. 3.2.1.8 beam current electron flow emitted by the cathode Note 1 to entry: This current may be constant or modulated. 3.2.1.9 clearance before welding (Fit up) distance measured o

41、n a straight section of the joint between the surfaces to be welded 3.2.1.10 slope (or ramp) up operating conditions for which the penetration depth varies incrementally 3.2.1.11 focusing level distance between the beam impact point on the detail parts and the focusing point Note 1 to entry: Convent

42、ionally, this distance is negative when the focusing point is within the detail parts. 3.2.1.12 perveance ratio of the beam current over the acceleration voltage at power 3/2 tecUI=233.2.1.13 beam power product of the acceleration voltage and the beam current BS EN 4677-001:2012EN 4677-001:2012 (E)

43、7 3.2.1.14 acceleration voltage difference in potential between the cathode and the anode, used to create the electric field intended to accelerate the electrons 3.2.1.15 beam oscillation periodic movement of the beam axis in relation to the weld pool Note 1 to entry: This oscillation is defined by

44、the signal shape, its amplitude, frequency and direction in relation to that of welding. 3.2.1.16 welding speed length of the weld on beam impact side produced per time unit 3.2.2 Other technical terms 3.2.2.1 welding campaign series of welding operations on identical parts, executed on the same mac

45、hine, without any changes of welding parameters, without performing other welds on the machine, without interrupting manufacturing for more than a week 3.2.2.2 welding cycle succession of different welding phases performed by the welding machine to make a weld 3.2.2.3 tacking pass pre-assembling of

46、elementary detail parts using the same process as the one used for welding, consisting of making a slightly penetrating, narrow weld, continuous or discontinuous along the joint plane, with the purpose of maintaining the detail parts in position 3.2.2.4 adjustment verification specimen a flat test s

47、pecimen of the same material, subjected to the same heat treatments as the detail parts, on which a melt run will be made in the middle using the parameters identical to those used for parts, and for which the relationship between the micrographic shape of the cross section cut of the bead and that

48、obtained on test specimens or real parts has been previously defined 3.2.2.5 structural state metal crystalline structural state 3.2.2.6 manufacturing performance of welding operations on new parts or repairs to existing assemblies (or products) 3.2.2.7 stabilized manufacturing manufacturing for whi

49、ch the reliability can be established without quality issue over several welding campaigns, of which the number is previously defined by the appropriate department of the design authority 3.2.2.8 smoothing pass or cosmetic pass remelted surface of the welded zone BS EN 4677-001:2012EN 4677-001:2012 (E) 8 3.2.2.9 batch of parts set of parts with the same reference from: the same welding