1、CEN EN+2157-3 93 3404589 0052653 301 = EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2157-3 August 1993 UDC 669.14-4 621.1 629.7 Descriptors: Aircraft industry, forgings, die forgings, steels, specifications English version Aerospace series Steel Forging stock and forgings Technical specifica
2、tion Part 3 - Pre-production and production forgings Srie arospatiale Luft- und Raumfahrt Acier Stahl Produits destins la forge Pices forges et pices matrices Spcification technique Partie 3 - Pices types et pices de srie Schmiedevormaterial und Schmiedestcke Tkchnische Lieferbedingungen Ri1 3 - Aus
3、fallmuster-und Serienschmiedestcke This European Standard was approved by CEN on 1993-08-19. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of anational standard without any alteration. Up-to-date l
4、ists 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). A version in any other language made by translation under the res
5、ponsibility 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, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norw
6、ay, 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 1 0 1993 Copyright reserved to CEN members Ref. No. EN 2157-3 : 1993 E CEN EN
7、*2L57-3 93 = 3404589 0052652 248 fige 2 EN 2157-3 : 1993 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 draft standard has successively rece
8、ived 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 shal be given the status of a national standard, either by pub
9、lication of an identical text or by endorsement, at the latest by February 1994, and conflicting national standards shall be withdrawn at the latest by February 1994. According to the CENKENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Bel
10、gium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents 1 Scope 2 Normative references 3 Pre-production forgings 4 Manufacture of production forgings 5 6 Marking lbles 1 untitled 2 Su
11、mmary of requirements Inspection and testing of production forglligs page 3 3 4 4 5 8 6 9 CEN EN*k2157-3 93 m 31.04589 O052653 I184 m Page 3 EN 2157-3 : 1993 1 scope The present standard specifies the particular requirements for steel forgings produced from forging stock complying with EN 2 1 57-2.
12、This standard shall be used in conjunction with EN 21 57-1. This standard also applies to pre-production forgings intended for the qualification of the method of manufacture and inspection. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from othe
13、r publications. These normative references ire cited at the appropriate places in 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
14、revision. For undated references the latest edition of the publication referred to applies. EN 2002-1 EN 2002-7 EN 2002-8 EN 2002-16 EN 2002-22 EN 2003-1 EN 2003-2 EN 2003-8 EN 2003-1 1 EN 2078 EN 2157-1 EN 21 57-2 EN 2857 Aerospace series - Test methods for metallic materials - Pan 1 - Tensile test
15、ing at ambient temperature Aerospace series - Test methods for metallic materials - Part 7 - Hardness test 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 testi
16、ng 2) Aerospace series - Test methods for metallic materials - Pan 22 - Plane strain fracture toughness test 2) Aerospace series - Test methods for steel products - Pan 1 - Charpy impact test (U notch) Test methods for steel products - Part 2 - Izod impact test - Aerospace series 3, Aerospace series
17、 - Test methods for products in steel, titanium, titanium alloys and heat resisting alloys - Part 8 - Ultrasonic inspection for semi-finished products (rolled, drawn, extruded, forged) 2, Aerospace series - Test methods for austenitic stainless steels - Part 11 - Determination of resistance to inter
18、granular corrosion by the Huey method ) Aerospace series - Metallic materials - Manufacturing schedule - Inspection schedule - Inspection and test report - Description and rules for use Aerospace series - Steel - Forging stock and forgings - Technical specification - Part 1 - General requirements Ae
19、rospace series - Steel - Forging stock and forgings - Technical specification - Part 2 - Forging stock Aerospace series - Test methods for ferromagnetic materials - Magnetic particle testing 2) 11 Published as AECMA Pre-standard at the date of publication of this standard 2) In preparation at the da
20、te of the publication of this standard 3) Published as AECMA Standard at the date of publication of this standard 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 ma
21、nufacturer and/or the purchaser; - heat treatment condition; - type and number of tests and inspections necessary to evaluate and qualify the manufacturing process (dimensions, mechanical and metallurgical properties, etc J; - manufacturing schedule as defined in EN 2078, if necessary. 3.1.2 The ins
22、pection and tests on pre-production forgings shall be carried out and recorded to allow the definition of the optimum techniques for the inspection and tests of production forgings, including, where appropriate, the ultrasonic test method (probe, frequency, angle of incidence, etc.). 3.1.3 The inspe
23、ction and tests carried out on pre-production forgings shall include those which will be carried out on production forgings. 3.2 Inspection and test report In addition to the information required by EN 2078, the inspection and test report on the pre- production forgings shall provide all technical i
24、nformation to allow the evaluation of the quality of these parts, e.g. photographs taken during macro- and micrographic examination, results of dimensional measurements etc. 3.3 Acceptance of pre-production forgings When all inspection and test results relative to pre-production forgings have been r
25、eported 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 the purchaser. 4 Manufacture of production forgings 4.1 At the start of production, the manufact
26、uring schedule may be completed to allow the manufacturer to guarantee the reproducibility of the product with more certainty. All information, no matter how minor, shall be recorded in the manufacturing schedule. 4.2 made without the written approval of the purchaser. When a manufacturing schedule
27、has been agreed, no change in manufacturing method shall be When such changes are necessary, the purchaser shall decide if new pre-production forgings shall be manufactured and tested. The manufacturing schedule and the inspection schedule shall be modified accordingly. CEN EN*2157-3 93 = 3404589 00
28、52655 T57 Page 5 EN 2157-3 : 1993 4.3 request of the manufacturer or purchaser : Any change in the form of the forging requiring a new or revised drawing may require, at the - manufacture of new pre-production forgings, or - modification of the manufacture schedule and/or the inspection schedule. 4.
29、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 the purchaser and stated in the manufacturing schedule. No straightening operations shall be per
30、mitted after final heat treatment unless previously 4.6 process which could influence the quality of the forgings shall be reported to the purchaser. Where a manufacturing schedule is not required, any major change in the manufacturing 5 Inspection and testing of production forgings Inspection and t
31、esting shall be carried out on production forgings under the same conditions as applied to pre-production forgings. 5.1 Non destructive tests 5.1.1 External defects All surfaces of each forging shall be visually examined after abrasive blasting and/or etching. This operation shall be followed by eit
32、her : a) magnetic particle examination in conformity with EN 2857, or b) dye penetrant testing in conformity with EN 2002-1 6. 1) The test method shall be indicated in the order or inspection schedule, if not indicated in these documents, the test method used shall be: a) for magnetic steels; b) for
33、 non magnetic steels. The surface of forgings shall be free from harmful defects, such as cracks, laps and single or discontinuous inclusion indications 8 mm in length, unless shorter lengths are specified on the drawing or inspection schedule. Local dressing may be carried out by the manufacturer p
34、rovided the dimensions of the product remain within the tolerance limits. The dressed area shall be re-inspected to verify that defects have been removed. I 1) Dye penetrant testing alone will not guarantee the detection of inclusions. CEN EN*2157-3 93 m 3q04589 0052656 993 Number of forgings 5.1.2
35、Internal defects Hardened and tempered, solution and precipitation Not heat treated annealed, normalized, solution treated When required by th6 drawing or the inspection schedule, the forgings shall be submitted to an uitrasonic inspection. The areas to be inspected shall be defined by these documen
36、ts. 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 detailing the ultrasonic technique. per batch (NI Unless otherwise stated by the purchaser, the a
37、cceptance criteria shall be class 2 of EN 2003-8. treated I Number of forgings to be tested Where the shape does not permit inspection at the final stage of fabrication, it may be carried out at an earlier stage by agreement between the manufacturer and the purchaser. 5 20 20 The test frequency is g
38、iven in table 2. Each forging Each forging 24?) 5.1.3 Batch uniformity To ensure that the forgings have been properfy heat treated and that the batch is uniform, hardness shall be measured, unless otherwise specified by the purchaser. Hardness shall be measured at the location selected by the manufa
39、cturer unless otherwise specified on the drawing or inspection schedule. Hardness shall be determined in accordance with EN 2002-7 and the results shall comply with the requirements of the material standard. Where no hardness value is indicated on the material standard, the method used to demonstrat
40、e batch uniformity shall be at the option of the manufacturer. Hardness measurements on forgings in a batch and on test samples representing the batch shall be made by the same method and under the same conditions of loading. The number of forgings to be tested for each batch shall be as indicated i
41、n table 1. Table 1 I tested may be reduced by using statistical principles. 1 Page 6 EN 2157-3 : 1993 CEN ENt2157-3 73 3404589 O052657 82T Page 7 EN 2157-3 : 1993 5.1.4 Dimensions and tolerances The dimensions and tolerances shall conform to the drawing or the inspection schedule. The dimensions spe
42、cially indicated shall be checked on each forging. For other dimensions, the frequency of examination adopted by the manufacturer shall be sufficient to permit him to certify compliance with the requirements. 5.2 Inclusion content 5.2.1 schedule. The inclusion content of forgings shall meet the requ
43、irements of the order or the inspection 5.2.2. The inclusion content shall be determined on the forging stock used for the manufacture of forgings in accordance with the requirements of EN 21 57-2. 5.3 Tensile test The nature, the quantity and the locations of the test pieces shall conform with the
44、drawing and/or the inspection schedule. The test shall be conducted in conformance with EN 2002-1. Tests on forgings thicker than 1 O rnm shall be performed on proportional round test pieces of the form and one of the sizes indicated in EN 2002-1. The results shall conform to the material standard,
45、drawing or inspection schedule. The test frequency is given in table 2. 5.4 Beam impact test The nature, the quantity and the locations of the test pieces shall conform with the drawing and/or the inspection schedule. Tests shall be carried out in accordance with EN 2003-1 or EN 2003-2 as required b
46、y the material standard. The results shall conform with the material standard, drawing or inspection schedule. The test frequency is given in table 2. 5.5 Grain flow and grain size If grain flow examination and grain size determination are required by the drawing or inspection schedule; macrographic
47、 and micrographic examination shall be carried out. The type and frequency shall conform with the drawing or inspection schedule. Grain site determination shall be in accordance with EN 2002-8. The test results shall conform to the results obtained on pre-production forgings and meet any specified r
48、equirements. 5.6 Intergranular corrosion testing If required, intergranular corrosion testing shall be carried out in accordance with EN 2003-1 1 and the frequency shall be indicated in table 2. The results shall conform with the material standard, drawing or inspection schedule. CEN EN*2157-3 93 m
49、3404589 00526.58 7bb Page 8 EN 2157-3 : 1993 5.7 fracture toughness iK1 c) Where required by theamaterial standard, KI c value shall be determined in accordance with the method defined in EN 2002-22. The “capability clause may be applied to this requirement. The test pieces shall be taken 8s indicated on the drawing or inspection schedule and the results shall conform with the material standard, drawing or inspection schedule. 5.8 Special tests Special tests and inspection may be required by the purchaser (8.9. overheating checks, stress corrosion testing, micrographic
