1、CEN PRENx2858 PART*3 93 m 3404589 0044bl13 484 m Approved by COMITE DE NORMALISATION Of A.E.C.M.A. 1993-04-26 A.E.C.M.A. STANDARD I The eqtivaient vmsions in French and German languages can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau 92138 ISSY - LES - MOULINEAUX CEDEX
2、NORME A.E.C.M.A. A.E.C.M.A. NORM prEN 2858 Part 3 Edition 1 April 1993 EDiTf PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATERIEL AEROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 UDC : Key words : ENGLISH VERSION Aerospace series
3、 Titanium and titanium alloys Forging stock and forgings 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
4、- und Raumfahrt Titan und Titanlegierungen Schmiedevormaterial und Schmiedestcke Technische Lieferbedingungen Teil 3 - Ausfallmuster- und Serienschmiedestcke This “Aerospace series“ standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arosp
5、atial). It is published on yellow paper in three equivalent versions (English, French, German). It will be submitted as a draft European Standard to CEN European Committee for Standardization) for final vote. aecma 7!3 CEN PREN*12858 PART*3 93 M 3404589 0044bL4 3LO M prEN 2858-3 Page 2 Contents list
6、 Scope Normative references Pre-production forgings Manufacture of production forgings Inspection and testing of production forgings Marking O 0 CEN PRENJ2858 PARTJ3 93 W 3404589 O044635 257 W prEN 2858-3 Page 3 1 Scope This standard specifies the particular requirements for titanium and titanium al
7、loys forgings produced from forging stock complying with EN 2858-2. It shall be used in conjunction with EN 2858-1. 2 Normative references EN 2002-1 EN 2002-2 EN 2002-5 EN 2002-7 EN 2002-8 EN 2002-16 EN 2003-8 EN 2003-10 EN 2078 EN 2858-1 EN 2858-2 EN 2954-2 EN 2957 EN 3114 Aerospace series - Test m
8、ethods for metallic materials - Part 1 - Tensile testing at ambient temperature Aerospace series - Test methods for metallic materials - Part 2 - Tensile testing at elevated temperature 1 Aerospace series - Test methods for metallic materials - Part 5 - Uninterrupted creep and creep rupture testing
9、2, Aerospace series - Test methods for metallic materials - Part 7 - Hardness tests ) Aerospace series - Test methods for metallic materials - Part 8 - Micrographic determination of grain size Aerospace series - Test methods for metallic materials - Part 16 - Dye penetrant testing 2) Aerospace serie
10、s - Test methods for products in steel, titanium, titanium alloys, aluminium alloys and heat resisting alloys - Part 8 - Ultrasonic inspection of billet, bars, plates and forgings *) Aerospace series - Test methods for products in titanium and titanium alloys - Part 10 - Sampling for determination o
11、f hydrogen content in titanium and titanium alloys *) Aerospace series - Manufacturing schedule, inspection schedule and inspection report - General definitions 3, Aerospace series - Titanium and titanium alloys forging stock and forgings - Technical specification - Part 1 - General requirements 2,
12、Aerospace series - Titanium and titanium alloys forging stock and forgings - Technical specification - Part 2 - Forging stock 2, Aerospace series - Macrostructure of titanium alloy wrought products - Part 2 - Macrostructure of bar, section, forging stock and forgings 2, Aerospace series - Method of
13、preparation of forged samples 2, Aerospace series - Test methods for titanium a + - Micrographic examination 2, 11 Published as AECMA Prestandard at the date of publication of the present standard 2) In preparation at the date of publication of the present standard 3) Published as AECMA Standard at
14、the date of publication of the present standard CEN PREN*2858 PART*3 93 m 3404589 OO44bLb 193 m prEN 2858-3 Page 4 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
15、manufacturer and/or the purchase; - Heat treatment 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 s
16、chedule as defined in EN 2078. 3.1.2 The inspection and 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. I. 3.1.3 Straightening
17、operations shall be recorded. If these operations become necessary for production forgings, their conditions shall be the subject of an agreement between the manufacturer and purchaser, and stated in the manufacturing schedule. 3.1.4 The inspection and tests caried out on pre-production forgings sha
18、ll include those which will be carried out on production forgings. 3.2 Inspection and test report In addition to the information required by EN 2858-1, the inspection and test report on the pre- production forgings shall provide all technical information to allow the evaluation of the quality of the
19、se parts, e.g. photographs taken during macro- and micrographic examination, results of dimensional measurements, etc. 3.3 Acceptance When all inspection and test results relative to pre-production forgings have been reported and accepted, the purchaser shall give his written agreement for series pr
20、oduction. The inspection schedule and, if required, the manufacturing schedule, shall be agreed upon between the manufacturer and purchaser. 4 Manufacture of production forgings 4.1 manufacturer to guarantee the reproducibility of the forging with more certainty. At the start of production, the manu
21、facturing schedule may be completed to allow the All information, no matter how minor, shall be recorded in the manufacturing schedule. 4.2 pre-production forgings shall be manufactured and tested. When changes in the manufacturing method are necessary, the purchaser shall decide if new The manufact
22、uring schedule and the inspection schedule shall be modified accordingly. CEN PRENx2858 PART*3 93 3401.1589 0044b17 02T prEN 2850-3 Page 5 4.3 the purchaser or manufacturer : Any change of the forging requiring a new or a revised drawing may require, at the request of - manufacture of new pre-produc
23、tion forgings, or - modification of the manufacturing schedule and/or the inspection schedule. 4.4 be subjected to the same approval process as the original documents. Manufacturing schedules and inspection schedules, which are modified during production shall 4.5 agreed between the manufacturer and
24、 the purchaser and stated in the manufacturing schedule . No Straightening operations shall be permitted after final heat treatment unless previously 4.6 which could influence the quality of the forgings shall be reported to the purchaser. Where a manufaturing schedule is not required, any major cha
25、nge in the manufacturing process 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 after a suita
26、ble chemical and/or mechanical surface preparation. If HN03-HF is used on forgings where the thickness of metal to be removed by machining is locally 10 : 1. 5.1 .l External defects Two visual examinations shall be carried out on all surfaces of each forging : - the first after macrographic etching
27、in accordance with EN 2954-2 and the second after etching and penetrant flaw detection in accordance with EN 2002-1 6. The surface of forgings shall be free from harmful defects (such as cracks, laps, or-case, segregations, inclusions etc.). The presence of a surface segregation or inclusions shall
28、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 test
29、 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 docum
30、ents. Inspection shall be conducted in conformity with the requirements of EN 2003-8 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 purchase
31、r, the criteria shall be class 3 as defined by EN 2003-8. CEN PRENSK2858 PARTS3 93 = 3404589 0044b18 Tbb prEN 2858-3 Page 6 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 purchas
32、er. The test frequency is given in table 1. 5.1.3 Batch uniformity 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 manu
33、facturer and shall be communicated to the purchaser. The frequency of examination adopted by the manufacturer shall be sufficient to permit him to certify compliance with the requirements. 5.1.4 Dimensions and tolerances lhe dimensions and tolerances shall conform to the drawing or the inspection sc
34、hedule. The dimensions specially indicated 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,
35、forged separately, in accordance with EN 2957; 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 accordance with EN 2002-1. Tests on forgings thicker than 10 mm shall be performed on propo
36、rtional round test pieces of the form and one of the size indicated in EN 2002-1. Where the use of such test pieces is not possible, the form and the size of the test pieces to be employed shall be the subject of an agreement between the manufacturer and purchaser and stated on the inspection schedu
37、le. The results shall meet the requirements of the material standard, drawing or inspection schedule. Unless otherwise specified on the drawing or inspection schedule the test frequency shall be as given in table 1. 5.2.2 At elevated temperature Testing shall be carried out in accordance with EN 200
38、2-2. Tests on forgings thicker than 10 mm shall be performed on proportional round test pieces of the form and one of the sizes indicated in EN 2002-2. Where the use of such test pieces is not possible, the form and the size of the test pieces to be employed shall be the subject of an agreement betw
39、een the manufacturer and purchaser and shall be stated on the inspection schedule. CEN PREN*2858 PART*3 93 m 3404589 0044637 7T2 m prEN 2858-3 Page 7 The results shall meet the requirements of the material standard, drawing or inspection schedule. Unless otherwise specified on the drawing or inspect
40、ion schedule, the test frequency shall be as given in table 1. 5.3 Uninterrupted creep and creep rupture testing Tests shall performed on proportional round test pieces, in accordance with EN 2002-5. Where the use of such test pieces is not possible, the form and the size of the test pieces to be em
41、ployed shall be the subject of an agreement between the manufacturer and the purchaser and shall be stated on the inspection schedule. The results shall meet the requirements of the material standard, drawing or inspection schedule. Unless otherwise specified on the drawing or inspection schedule th
42、e test frequency shall be as given in table 1. 5.4 Grain flow The grain flow examination shall be carried out after surface preparation in accordance with EN 2954-2. The grain flow of forgings shall meet the requirements of the drawing or inspection schedule and shall conform to the results obtained
43、 on pre-production forging. The test frequency shall be defined in the inspection schedule. 5.5 Grain size and structure Grain size and structure shall be checked as required by the drawing or inspection schedule. a + alloys structure shall be assessed in accordance with EN 31 14. 5.6 Hydrogen conte
44、nt The hydrogen content shall be determined in accordance with EN 2003-10 on a representative sample taken from a forging in the delivery condition. The results shall comply with the requirements of the material standard, drawing or inspection schedule. The “capability clause“ shall be applied. 5.7
45、Special tests Special tests and inspections may be required by the purchaser. In such cases, after agreement between the purchaser and manufacturer, the nature of the test, methods, frequency of test and acceptance criteria shall be specified on the order or in the inspection schedule. CEN PRENx2858
46、 PARTL3 93 W 3404589 O044620 bL4 prEN 2858-3 Page 8 6 Marking 6.1 Each forging shall bear the following identification marking : - material standard number; - delivery condition code; - part or drawing number, and serial number, if required; - batch number; - identification of the manufacturer and,
47、where appropriate, identification of the plant; - inspection stamp. 6.2 Unless otherwise indicated on the drawing, order or inspection schedule, the method of marking shall be at the discretion of the manufacturer. The method of marking shall have no detrimental effect on the forging. 6.3 If shape o
48、r size does not permit the marking to 6.1, the amount of marking may be reduced (codified, contracted, etc.) by agreement between the manufacturer and the purchaser provided traceability to the required information is maintained. Alternatively the forgings shall be packed in bags or bundles each of
49、which shall carry a durable label bearing the information required in 6.1. CEN PRENW858 PART+3 93 3404589 0044b2L 550 prEN 2858-3 Page 9 Table 1 - Summary of requirements Requirement ciause Product nspectionfles Standard ng Frequency One per cast (carried out and certified by the melter) Method Chemical composition see EN 2858-1 All Visual examination after etching after penetrant flaw detection Ultrasonic inspection Each forging External defects All EN 2954-2 EN 2002-16 5.1.1 5.1.2 Internal defects EN 2003-8 When required Each forging 5.1.3 All see 5.1
