1、CEN PRENt2858 PART*L 93 3404589 0044593 Bbb Approved by COMITE DE NORMALISATION of A.E.C.M.A. 1993-04-26 A.E.C.M.A. STANDARD NORME A.E.C.M.A. A.E.C.M.A. NORM The equivalent verrions in French and German languages can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau 921 38 IS
2、SY - LEC - MOULINEAUX CEDEX prEN 2858 Part 1 Edition 1 April 1993 EDITE PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATERIEL AEROSPATIAL Technopolis - 175, rue Jean-JacquesRousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 UDC : Key words : ENGLISH VERSION Aerospace series Titan
3、ium and titanium alloys Forging stock and forgings Technical specification Part 1 - General requirements Srie arospatiale Titane et alliages de titane Produits destins la forge, pices forges et pices matrices Spcification technique Partie 1 - Exigences gnrales Luft- und Raumfahrt Titan und Titanlegi
4、erungen Schmiedevormaterial und Schmiedestcke Technische Lieferbedingungen Teil 1 - Allgemeine Anforderungen This “Aerospace series“ standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on yell0 w paper in three
5、 equivalent versions (English, French, German). It will be submitted as a draft European Standard to CEN (European Committee for Standardization) for final vote. I I 0 axma 1993 CEN PRENx2858 PART*L 93 3404589 0044594 7T2 ptEN 2858-1 Page 2 1 2 3 4 5 6 7 a 9 10 11 12 13 Contents list Scope Normative
6、 references Definitions Quality assurance Manufacture Traceability Freedom from defects Testing Marking Acceptance Inspection and test report Packaging Wording of orders CEN PRENr2858 PARTxL 93 = 3404589 0044595 639 prEN 2858-1 Page 3 1 Scope This standard defines the general requirements for manufa
7、cture, inspection and testing of forging stock, hand forgings including forged blocks and rings 1, die forgings and rolled rings in titanium and titanium alloy. The specific requirements are defined in EN 2858-2 and EN 2858-3. The standards EN 2858-1, EN 2858-2 and EN 2858-3 define the inspection le
8、vel and the sampling frequencies to be applied unless otherwise specified on the drawing, order or inspection schedule. This standard shall be applied in conjunction with the EN material standards unless otherwise specified on the drawing, order or inspection schedule. By agreement between the manuf
9、acturer and the purchaser, it may also be applied to other materials or delivery conditions not covered by EN standards. The agreement shall be formalized by reference to this standard on the drawing, order or inspection schedule. 2 Normative references EN 2000 EN 2003-10 EN 2078 EN 2858-2 EN 2858-3
10、 EN 2957 Aerospace series - Quality assurance - EN aerospace products - Approval of the quality system of manufacturers Aerospace series - Test methods for products in titanium and titanium alloys - Part 10 - Sampling for determination of hydrogen content in titanium and titanium alloys Manufacturin
11、g schedule - Inspection schedule and inspection report - General definitions - Aerospace series Aerospace series - Titanium and titanium alloys forging stock and forgings - Technical specification - Part 2 - Forging stock Aerospace series - Titanium and titanium alloys forging stock and forgings - T
12、echnical specification - Part 3 - Pre-production and production forgings 3, Aerospace series - Method of preparation of forged samples 4, 1) Hereafter described as forgings 2) In preparation at the date of publication of this standard 3) Published as AECMA Standard at the date of publication of this
13、 standard 4) Published as AECMA Prestandard at the date of publication of this standard CEN PRENL2858 PART*L 93 m 3404589 O044596 575 = prEN 2858-1 Page 4 3 Definitions 3.1 Purchaser Body which purchases the products from a manufacturer or a stockist in accordance with the requirements of the user.
14、NOTE : The purchaser may also be the user. 3.2 User See EN 2000. 3.3 Charge for melting Different products put into a furnace to be melted together. 3.4 Cast Mass of metal from the same final melting operation. 3.5 Campaign A continuous production sequence using the same equipment without alteration
15、 to the operating conditions. 3.6 Batch A batch consists of forging stock or forgings : - of the same form and nominal dimensions or having the same drawing or part number, - from the same cast; - from the same forging campaign; - in the same heat treatment condition; - from the same heat treatment
16、charge which shall be defined in the internal documentation of the manufacturer. 3.7 Pre-production forgings Forgings produced to a particular design which qualify the method of manufacture, equipment configuration and, if appropriate, the forging stock source, which demonstrate that the requirement
17、s of the purchaser can be met. 3.8 Inspection schedule See EN 2078. 3.9 Manufacturing schedule See EN 2078. 3.1 O Inspection report See EN 2078. CEN PRENr2858 PART*l 93 W 3404589 0044597 401 W Selected temperature OC 600 6000 1100 prEN 2858-1 Page 5 Tolerances OC I5 i 10 3.1 i “Capability clause“ Re
18、ference to “capability clause“ signifies that sufficient evidence of a statistical nature with respect to the properties under consideration can be submitted to show that the requirements of the relevant standard may be met on the basis of a reduced amount of testing. Such action in no way reduces t
19、he obligations of the manufacturer to fulfill all requirements. If subsequent testing indicates that a product does not comply with the requirements, the batch shall be rejected. 4 Quality assurance 4.1 Approval of the quality system of manufacturers See EN 2000. 4.2 Product qualification See materi
20、al standard. 5 Manufacture 5.1 Forgings shall be made from forging stock complying with the relevant material standard and with EN 2858-2. 5.2 Unless otherwise specified, the method of manufacture to be employed shall be at the discretion of the manufacturer. 5.3 If required, a manufacturing schedul
21、e shall be established and agreed for forging stock and forgings. After qualification of the forging stock and/or pre-production forgings no change in the manufacturing method shall be made without previous written approval of the purchaser. 5.4 The forging stock and forgings shall be supplied in th
22、e heat treatment condition specified in the material standard. If otherwise agreed, or if there is more than one heat treatment condition in the material standard, the condition of supply shall be specified on the order or on the drawing. If a specific heat treatment temperature (value and tolerance
23、) is stated, that temperature shall be mandatory. If a temperature range is stated, a temperature within that range reduced by the furnace tolerances shall be selected. Unless otherwise specified, the charge shall be maintained at the temperature subject to the tolerances in the table 1 for the peri
24、od stated. Table 1 6 Traceability Each product shall be identifiable to its batch at all stages of manufacture and delivery. prciv LOQO- I rage u 7 Freedom from defects All products shall be free from irregularities not complying with the requirements of the material standard or the order, or prejud
25、icial to the subsequent manufacture of use of the product. Notwithstanding previous acceptance of products complying with this standard, any product that is found, at a later stage, to contain such defects may be rejected. 8 Testing The tests required by the material standard, the order, the inspect
26、ion schedule or the drawing shall be made in accordance with the requirements of the appropriate test standard. If no test standard exists, the method shall be agreed between the manufacturer and the purchaser. Unless otherwise specified on the order, the frequency of testing shall be as specified i
27、n EN 2858-2 or EN 2858-3. Where necessary, the location and the direction of the test samples shall be specified on the order. 8.1 Chemical composition It shall comply with the requirements of the relevant material standard and shall be determined on each cast. The samples taken for analysis shall b
28、e representative of the cast. The method of analysis shall be selected by the manufacturer, but in case of dispute, the method set out in the relevant IS0 standard shall be used. If no IS0 standard exists, a fundamental method of chemical analysis shall be used. The hydrogen content determination sh
29、all be in accordance with EN 2003-1 O. Tests shall be made at a frequency of one per cast. Tests shall comply with the requirements of the relevant material standard. 8.2 Preparation of test samples and test pieces 8.2.1 Test samples for the tests required by the material standard shall be obtained
30、by one or more of the following methods as agreed between the manufacturer and the purchaser and indicated on the drawing or the inspection schedule : a) test samples cut from forgings, b) test samples forged integrally with the forgings, c) test samples forged separately from the same batch of forg
31、ing stock as the forgings they represent. 8.2.2 The test samples and associated test pieces shall be marked in such a manner that their identity, location and orientation with respect to the forging stock, or forging and the batch are maintained. 8.3 Unless otherwise specified on the order or in the
32、 inspection schedule, the heat treatment of the test samples from forging stock or forgings shall be in accordance with the reference heat treatment for forging stock or heat treatment of use forgings defined in the relevant material standard. Heat treatment of test samples CEN PREN*i2858 PART*KL 93
33、 = 3404589 0044599 284 O e e O prEN 2858-1 Page 7 Unless otherwise agreed between the manufacturer and purchaser, test samples from forging 8.3.1 stock or forgings or forged integrally with the forgings shall not be cut prior to heat treatment. 8.3.2 Separately forged test samples shall be heat trea
34、ted with the batch they represent, regardless of its delivery condition. 8.3.3. Test samples cut from forgings in the finally heat treated condition shall not be further heat treated. 8.3.4. Test samples representing forgings supplied in other than the finally heat treated condition, shall be additi
35、onally heat treated in accordance with the requirements of the material standard. 8.4 Strain rate The strain rate up to the proof stress shall be within the range of 0,3%/min to 0,7%/min. In cases of dispute a strain rate of 0,5%/min shall be used. After proof stress, the speed may be increased up t
36、o 5%/min or such that failure occurs within approximately one minute. 8.5 Re-tests If any requirement is not met, re-tests shall be carried out under the following condition : 8.5.1 Tensile, impact, creep, and stress rupture testing If the test procedure or the test piece preparation is faulty, test
37、ing shall be re-applied at the original frequency after identification of the cause of failure. When failure cannot be attribued to a faulty test procedure or to test piece preparation, additional identical test samples shall be selected at twice the original frequency. At least one of the samples s
38、hall be taken from the forging stock or forgings on which the incorrect result was obtained (unless already rejected by the manufacturer after suitable identification of the cause of the failure). If all results are satisfactory, the batch shall be accepted. If one or more results are unsatisfactory
39、, the batch shall be : - either rejected; - or partially or fully re-heat treated and tested as a completely new batch except for chemical composition. 8.5.2 Metallographic examination If the examination or the test sample preparation is faulty, examination shall be re-applied at the original freque
40、ncy after identification of the cause of failure. When failure cannot be attributed to a faulty examination or to the test sample preparation, the batch shall be : - either rejected; - or partially or fully re-heat treated (if the structure may be corrected by heat treatment) and then tested as a ne
41、w batch except for the chemical composition and submitted to the purchaser for acceptance. CEN PREN*2858 PARTS1 93 3404589 O044600 826 prEN 2858-1 Page 8 8.5.3 Other tests For other tests specific to a product, the re-test procedure shall be defined on the order, drawing or inspection schedule. 8.6
42、Re-heat treatment No forging stock, forging or test sample shall be re-solution heat treated more than once without the agreement of the purchaser. 9 Marking See : - EN 2858-2 for forging stock; - EN 2858-3 for forgings. Unless otherwise indicated on the drawing, order or inspection schedule, the lo
43、cation of marking shall be at the discretion of the manufacturer. lhe marking shall not cause corrosion, cracks or contamination. O The frequency of examination adopted by the manufacturer shall be sufficient to permit him to certify compliance with the requirements. 1 O Acceptance If required, the
44、manufacturer shall inform the purchaser or his chosen agent of the dates planned for the extraction of samples and acceptance testing, in order that he may witness these operations. 11 Inspection and test report The manufacturer shall furnish with each delivery an inspection and test report conformi
45、ng to requirements of EN 2078 stating the following information : - manufacturers name and address; - order number; - material standard number; - drawing or part or product number; - quantity; - cast and batch numbers; - condition of the material as delivered; - batch andfor test samples heat treatm
46、ent, if necessary; - results of the mandatory tests, re-tests and chemical analysis; - inspectors stamp. 12 Packaging If the purchaser does not specify any particular requirements, the manufacturer shall apply a suitable protection to ensure that the products are delivered in a satisfactory conditio
47、n. The exterior of the packaging shall bear the following information : - name of purchaser; - mass; - order number and sufficient information to enable the contents to be related to the relevant O documentation. CEN PREN*ZBSB PART*L 93 3404589 0044b01 762 prEN 2858-1 Page 9 13 Wording of orders The
48、 orders shall clearly indicate : - quantities to be supplied; - datek) of delivery; - material standard number; - delivery condition of the products; - dimensions and tolerances of forging stock, forging number or its drawing number, with the - forwarding address; - manufacturing and inspection schedule references; - nature and type of packaking, if required. relevant issue number, if applicable;
