1、A.E.C.M.A. STANDARD NORME A.E.C.M.A. A.E.C.M.A. NORM Approved by COMITE DE NORMALISATION of A.Eet2.M.A. 1987-02-01 prEN2076 Part 3 Edition 1 February 1987 The equivalent versions in French and German languages can be supplied by B.N.A.E., 8, rue Moreau-Vauthier 92100 BOULOGNE-BILLANCOURT - FRANCE. E
2、NGLISH VERSION Aerospace series Aluminium and magnesium alloy ingots and castings - Technical specification - Part 3 - Pre-production and production castings Srie arospatiale Luft- und Raumfahrt Lingots et pices moules en alliages daluminium et de magnsium - Spcification technique - Partie 3 - Pices
3、 types et pices de serie Blcke und Gustcke aus Aluminium- und Magnesiumlegierungen - Technische Lieferbedingungen - Teil 3 - Ausfallmuster und Seriengustcke - This industrial standard for the aerospace sector has been drawn up under the responsibility of AECMA (Association Europenne des Constructeur
4、s de Matriel Arospatiat). It is published on yellow paper in three equivalent versions (English, French, German). It will be submitted to CEN (European Commitree for Standardization) as a draft European Standad. * AECMA PREN207b-03 87 LOL23LL 0007658 2 mi prEN2076-3 Page 2 Contents 1 2 References 3
5、Casting deve1 opment 4 Pre-production castings 5 Manufacture of production castings Scope and field of application 6 7 Weld repair Inspection and testing of production castings 8 Marking AECMA PREN207b-03 7 L0123LL 0007b59 4 - _- prEN2076-3 Page 3 1 Scope and field of application This standard speci
6、fies the particular requirements for castings in aluminium and magnesium alloys produced from material complying with EN2076-2. ThSs standard also applies to pre-production castinp intended for the qualification of the method of manufacture and inspection. This standard shall be used in conjunction
7、with EN2C76-1. 2 References EN2002-1, Aerospace series - Test methods for metallic maty-ials - Part 1 - Tensile testing at ambient temperature EN2002-7, Aerospace series - Test.qi$thods for metallic materials - Part 7 - Hardness tests EN2002-16, Aerospace series - Test methods ffy metallic materials
8、 - Part 16 - Dye penetrant testing EN2002-21, Aerospace series - Test methods for metallic mater Is - EN2004-4, Aerospace series - Test methods for aluminium and aluminium alloys - Part 4 - Stress corrosion test method for hi$ strength al uminium al 1 oy wrought proaucts. Al ternate immersion Part 2
9、1 - Radiographic testing of cast components 17 1 EN2076-1, Aerospace series - Aluminium and magnesium alloy ingots and castings - Technical specification - Part 1 - General requirements EN2076-2, Aerospace series - Aluminium and magnesium alloy ingots and castings - Technical specification - Part 2
10、- Ingots for remelting e i) in preparation I AECMA PREN207b-03 87 pp0L23LL 0007bb0 O W I I prEN2076-3 Page 4 3 Casting deve1 opment It is strongly recommended that the technical representative of the manufacturer be given the opportunity to examine the casting drawing at the initial stages of design
11、 and to advise on the optimum design which will facilitate consistent production of acceptable castings. The dimensional tolerances of the castings shall be as aoreed between the purchaser and manufacturer and indicated on the drawing or the inspection schedule. 4 Pre-production castings 4.1 General
12、 4.1.1 The following requirements shall be specified on the order, drawing and/or inspection schedule in addition to those specified in EN2076-1 : - Number of castings to be examined - Who shall perform the examination -. - - Heat treatment condition - Type and frequency of inspection and testing ne
13、cessary to evaluate and qualify the manufacturing process (dimensions , mechanical and metallurgical properties, etc.). 4.1.2 The inspection and testing of pre-production castings shall be carried out and the inspection and testing conditions shall be recorded to allow the definition of the optimum
14、techniques to be used for production castings. -0 4.1.3 The inspection and tests carried out on pre-production castings shall include those which will be carried out on production castinos, 4.2 Inspection and testing report In addition to the information required by EN2076-1, the inspection and test
15、ing report on the pre-production castings shall provide all -technical information to allow evaluation of the quality of these parts, e.g., radiographs, results of dimensional measurements . AECMA PREN2076-03 87 3012313 0007663 2 m prENZ076-3 Page 5 4.3 Acceptance of pre-production castings Nhen al
16、1 inspection and test results relative to pre-production castings have been reported and considereded as satisfactory by the purchaser and manufacturer, the purchaser shall give his written agreement or order for series production. The inspection schedule and if required the manufacturing schedule s
17、hall be agreed between the manufacturer and purchaser. 5 Manufacture of production castings 5.1 At the start of production (particularly at the start of series production), the manufacturing schedule may be completed to al 1 ow the manufacturer to guarantee the reproducibility of the product with mo
18、re certainty. All information, no matter how minor, shall be recorded in the manufacturing schedul e. 5.2 When a manufacturing schedule has been agreed, no change in manufacturing method shall be made without the written approval of the purchaser. When such changes are necessary in the case of, for
19、example : a) b) Alterations of pattern, mould material or position of runners and risers, Alteration of the casting process, c) Alterations of the heat ti-eatment process, the purchaser shall decide if new pre-production castings shall be manufactured and tested. The manufacturing schedule and the i
20、nspectiot schedule shall be modified if necessary. 5.3 Any change of the casting requiring a revised drawing may require at the purchaser I s or manufacturers request : - manufacturing of new pre-production castings, or - modification of the manufacturing schedule and/or the inspecticn schedule. AEC
21、MA PREN207b-03 87 M 1Ol123Ll 0007662 4 W prEN2076-3 Page 6 5.4 Manufacturing schedules and inspection schedules, which are modified during production shall be subjected to the same approval process as the .original documents. 5.5 Approved scrap may be added to the melt at the discretion of the manuf
22、acturer up to the maximum amount specified on the manufacturing schedule. 5.6 Correction of distortion shall be carried out only by agreement between the manufacturer and the purchaser. The manufacturer shall be responsible for specifying the conditions under which such correction is to be carried o
23、ut, subject to any provisions made by the purchaser. The method agreed shall be incorporated in the manufacturing schedule, After correction of distortion the castings shall be examined by penetrant flaw detection as per clause 6 L .- i-. c .- 2 O u M M L! tj M U a W -a m W T- x w c + - E AECMA PREN
24、2076-03 7 LOL23LL 0007670 3 prEN2076-3 Page 14 - e Table 2 - Radiographic acceptance standards for aluminium alloy castings up to a thickness of i 9 rnrn . Cracks, cold shuts or segregations are not acceptable Gas holes Shrinkage 1/4“ 1 2 4 (sponge) 3/4“ 1 2 3 1 /4“ -1 2 4 1 2 4 3/4“ Foreign materia
25、l (less dense) Foreign materiai (more dense) 1 /4“ 1 2 4 1 1 3 3/4“ Any indication of the diffraction mottling phenomenom is acceptable provided it is confirmed to the satisfaction of the radiologist, either by additional radiographs at different angles, or by the cut-up of representative castings.
26、Note : Acceptance standards for castings over 19 mm wall thickness shall be defined on the order, drawing or inspection schedule. 1 /4“ 3/4“ 1 /4“ 3f 4“ 2 2 2 2 1 1 None 1 I AECMA PREN207b-03 87 3012333 0007673 5 m, _ prEN2076-3 Page 15 Table 3 - Radiographic acceptance standards for magnesium alloy
27、 . castings up to a thickness of G 19 mrn Cracks and cold shuts are not acceptable Acceptance standard reference plate number Plate designation Defects GradeA 1 GradeB I GradeC 1 /4“ 3/4“ 1 1 3 3 5 4 Gas holes o Segregation Reacted sand inclusion Eutectic segregation Micro shrinkage type 1 /4“ 1 /4“
28、 Gravity segregation 1 /4“ 2 Micro shrinkage (Feathery) 3 4 7 7 1 /4“ 3/4“ 1 /4“ 3/4“ 7 I 2 I 1 1 3 8 I I Foreign material (less dense) 4 4 Foreign material (more dense) 2 2 lj Plate 1 for Mg-AI-Zn alloys not containing Zr. Any indication of the diffraction mottling phenornenom is acceptable provided it is confirmed to the satisfaction of the radiologist, either by additional radiographs at different angles, or by the cut-up of representative castings. Note : Acceptance standards for castings over 19 mm wall thickness shall be defined on the order, drawing or inspection schedule. d
