1、BRITISH STANDARD AEROSPACE SERIES BS EN 2858-3:1994 Titanium and titanium alloys Forging stock and forgings Technical specifications Part 3: Pre-production and production forgings The European Standard EN 2858-3:1994 has the status of a British Standard UDC 669.295-4:621.73:620.1:629.7BSEN 2858-3:19
2、94 This British Standard, having been prepared under the directionof the Aerospace Standards Policy Committee, waspublished under the authorityof the Standards Boardand comes into effect on 15July1994 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference A
3、CE/61 Draft for comment 93/707237 DC ISBN 0 580 22392 2 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreichisches Normun
4、gsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of
5、Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de
6、Normalizacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBSEN 2858-3:1994 BSI 11-1999 i Contents Page Cooperating organizations Insi
7、de front cover National foreword ii Foreword 2 1 Scope 3 2 Normative references 3 3 Pre-production forgings 3 4 Manufacture of production forgings 4 5 Inspection and testing of production forgings 4 6 Marking 5 National annex NA (informative) Committees responsible Inside back cover National annex N
8、B (informative) Cross-references Inside back cover Table 1 Summary of requirements 6BSEN 2858-3:1994 ii BSI 11-1999 National foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee and is the English language version of EN2858-3:1994, Aerospac
9、e series. Titanium and titanium alloys. Forging stock and forgings. Technical specification. Part 3 Pre-production and production forgings, published by the European Committee for Standardization (CEN). EN 2858-3:1994 was produced as a result of international discussion in which the United Kingdom t
10、ook an active part. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This
11、 document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside f
12、ront cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2858-3 April 1994 UDC 669.295-4:621.73:620.1:629.7 Descriptors: Aircraft industry, titanium, titanium alloys, forgings, die forgings, specifications English version Aerospace series Titanium and titanium alloys Forging stock and forging
13、s Technical specification Part 3: Pre-production and production forgings Srie arospatiale Titane et alliages de titane Produits destins la forge, pices forges et pices matrices Spcification technique Partie 3: Pices types et pices de srie Luft- und Raumfahrt Titan und Titanlegierungen Schmiedevormat
14、erial und Schmiedestcke Technische Lieferbedingungen Teil 3: Ausfallmuter- und Serienschmiedestckel This European Standard was approved by CEN on 1994-04-27. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the
15、 status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German)
16、 A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germ
17、any, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1994 Copyr
18、ight reserved to CEN members Ref. No. EN 2858-3:1994 EEN2858-3:1994 BSI 11-1999 2 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried out in accordance with the rules of this Association, this standard ha
19、s successively received the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This standard was submitted for Formal Vote, and the result was positive. This European Standard shall be given the status of a national sta
20、ndard, either by publication of an identical text or by endorsement, at the latest by October1994, and conflicting national standards shall be withdrawn at the latest by October1994. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Stand
21、ard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EN2858-3:1994 BSI 11-1999 3 1 Scope This standard specifies the particular requirements for titanium and titanium alloys
22、 forgings produced from forging stock complying with EN2858-2. It shall be used in conjunction with EN2858-1. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places i
23、n the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred
24、to applies. EN 2002-1, Aerospace series Test methods for metallic materials Part 1: Tensile testing at ambient temperature 1) . EN 2002-2, Aerospace series Test methods for metallic materials Part 2: Tensile testing at elevated temperature 1) . EN 2002-5, Aerospace series Test methods for metallic m
25、aterials Part 5: Uninterrupted creep and creep rupture testing 1) . EN 2002-16, Aerospace series Test methods for metallic materials Part 16: Dye penetrant testing 2) . EN 2003-8, Aerospace series Test methods for products in steel, titanium, titanium alloys, aluminium alloys and heat resisting allo
26、ys Part8:Ultrasonic inspection of billet, bars, plates and forgings 2) . EN 2003-10, Aerospace series Test methods for products in titanium and titanium alloys Part10:Sampling for determination of hydrogen content in titanium and titanium alloys 2) . EN 2078, Aerospace series Metallic materials Manu
27、facturing schedule Inspection schedule Inspection and test report Description and rules for use. EN 2858-1, Aerospace series Titanium and titanium alloys Forging stock and forgings Technical specification Part 1: General requirements. EN 2858-2, Aerospace series Titanium and titanium alloys Forging
28、stock and forgings Technical specification Part 2:Forging stock. EN 2954-2, Aerospace series Macrostructure of titanium alloy wrought products Part2:Macrostructure of bar, section, forging stock and forgings 2) . EN 2957, Aerospace series Method of preparation of forged samples 1) . EN 3114, Aerospa
29、ce series Test methods for titanium ! + “ Micrographic examination 2) . 3 Pre-production forgings 3.1 General 3.1.1 The following requirements shall be specified on the order, drawing and/or inspection schedule: number of forgings to be examined by the manufacturer and/or the purchaser; heat treatme
30、nt condition; type and number of tests and inspections necessary to evaluate and qualify the manufacturing process (dimensions, mechanical and metallurgical properties, etc.) location and orientation of test samples; if required, manufacturing schedule as defined in EN2078. 3.1.2 The inspection and
31、test conditions shall be recorded to allow the definition of the optimum techniques to be used for production forgings, including, where appropriate, the ultrasonic test method (probe, frequency, angle of incidence, etc.). 3.1.3 Straightening operations shall be recorded. If these operations become
32、necessary for production forgings, their condition shall be agreed between the manufacturer and purchaser, and stated in the manufacturing schedule. 3.1.4 The inspection and tests carried out on pre-production forgings shall include those which will be carried out on production forgings. 3.2 Inspect
33、ion and test report In addition to the information required by EN2858-1, the inspection and test report on the pre-production forgings shall provide all technical information to allow the evaluation of the quality of these parts, e.g.photographs taken during macro- and micrographic examination, resu
34、lts of dimensional measurements, etc. 1) Published as AECMA Prestandard at the date of publication of this standard 2) In preparation at the date of publication of this standardEN2858-3:1994 4 BSI 11-1999 3.3 Acceptance When all inspection and test results relative to pre-production forgings have be
35、en reported and accepted, the purchaser shall give his written agreement for series production. The inspection schedule and, if required, the manufacturing schedule, shall be agreed between the manufacturer and purchaser. 4 Manufacture of production forgings 4.1 At the start of production, the manuf
36、acturing schedule may be completed to allow the manufacturer to guarantee the reproducibility of the forging with more certainty. All information, no matter how minor, shall be recorded in the manufacturing schedule. 4.2 When changes in the manufacturing method are necessary, the purchaser shall dec
37、ide if new pre-production forgings shall be manufactured and tested. The manufacturing schedule and the inspection schedule shall be modified accordingly. 4.3 Any change of the forging requiring a new or a revised drawing may require, at the request of the purchaser or manufacturer: manufacture of n
38、ew pre-production forgings, or modification of the manufacturing schedule and/or the inspection schedule. 4.4 Manufacturing schedules and inspection schedules, which are modified during production shall be subjected to the same approval process as the original documents. 4.5 No straightening operati
39、ons shall be permitted after final heat treatment unless previously agreed between the manufacturer and the purchaser and stated in the manufacturing schedule. 4.6 Where a manufacturing schedule is not required, any major change in the manufacturing process which could influence the quality of the f
40、orgings shall be reported to the purchaser. 5 Inspection and testing of production forgings Inspection and testing shall be carried out on production forgings under the conditions defined during the examination of pre-production forgings. 5.1 Non-destructive tests Inspections shall be carried out af
41、ter a suitable chemical and/or mechanical surface preparation. If HNO 3 -HF is used on forgings where the thickness of metal to be removed by machining is locally 10 :1. 5.1.1 External defects Two visual examinations shall be carried out on all surfaces of each forging: the first after macrographic
42、etching in accordance with EN2954-2 and the second after etching and penetrant flaw detection in accordance with EN2002-16. The surface of forgings shall be free from harmful defects (such as cracks, laps, !-case, segregations, inclusions etc.). The presence of a surface segregation or inclusions sh
43、all require further investigation by a method agreed between the manufacturer and purchaser. Local dressing of defects may be carried out by the manufacturer provided the dimensions of the product remains within the tolerance limits. Local dressing shall not affect the sensitivity of any ultrasonic
44、test which may be required. The dressed area shall be re-inspected to verify that defects have been removed. 5.1.2 Internal defects When required by the drawing or the inspection schedule, each forging shall be submitted to ultrasonic inspection. The areas to be inspected shall be defined by these d
45、ocuments. Inspection shall be conducted in conformity with the requirements of EN2003-8 and the method defined during evaluation of the pre-production forgings. The inspection schedule shall include a sheet providing full details of the ultrasonic test procedure. Unless otherwise stated by the purch
46、aser, the criteria shall be class3 as defined by EN2003-8. When the shape of the part does not permit inspection at the final stage of fabrication, it may be carried out at an earlier stage by agreement between manufacturer and purchaser. The test frequency is given inTable 1. 5.1.3 Batch uniformity
47、 Evidence of the batch uniformity of the forgings (identification of the alloy and heat treatment condition) shall be demonstrated by the manufacturer. Unless otherwise specified, the method used shall be at the discretion of the manufacturer and shall be communicated to the purchaser. The frequency
48、 of examination adopted by the manufacturer shall be sufficient to permit him to certify compliance with the requirements.EN2858-3:1994 BSI 11-1999 5 5.1.4 Dimensions and tolerances The dimensions and tolerances shall conform to the drawing or the inspection schedule. The dimensions specially indica
49、ted shall be checked on each forging. For other dimensions, “capability clause” shall apply. 5.2 Tensile test The nature: test samples cut from forging stock or forgings; test samples forged integrally with the forgings; test samples from forging stock, forged separately, in accordance with EN2957; quantity and locations of the test samples shall conform to the drawing and/or the inspection schedule. 5.2.1 At room temperature Testing shall be carried out in accord
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