1、CEN PREN+2860 PART*i 73 3Y04589 0050889 317 Edition approved for publication AECMA STANDARD NORME AECMA AECMA NORM C5 Chairman Comments should be sent within six months after the date of publication to prEN 2860 Part 2 Edition P 1 October 1993 DIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATR
2、IEL AROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 UDC : Descriptors : ENGLISH VERSION Aerospace series Heat resisting alloys Forging stock and forgings Technical specification Part 2 - Forging stock Srie arospatiale Luft- und Raumfa
3、hrt Alliages rsistant chaud Produits destins a la forge et pices forges Partie 2 - Produits destins la forge Hochwarmfesten Legierungen Schmiedevormaterial und Schmiedestcke Spcification technique Technische Lieferbedingungen Teil 2 - Schmiedevormaterial This “Aerospace Series“ Prestandard has been
4、drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Technical Committee folio wing comment by the Member countries.
5、Subsequent to the publication of this prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and signature of the AECMA Standard Checking Centre (NPS) and forma
6、l agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. 1993-1 0-29 AECMA Technopolis - 1 75, rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux Cedex - FRANCE Mr. Odorico I I ae
7、crna 199: CEN PREN*2860 PARTt2 93 W 3404589 0050890 039 W prEN 2860-2 Page 2 Contents 1 Scope 2 References 3 Manufacture 4 Inspection and testing 5 Marking CEN PREN*2860 PARTx2 93 3404589 0050893 T75 prEN 2860-2 Page 3 1 Scope This standard defines the particular requirements for forging stock inten
8、ded to be used for the manufacture of forgings in heat resisting alloys and shall be used in conjunction with EN 2860-1. 2 Ref er en ces EN 2002-1 EN 2002-2 EN 2002-5 EN 2002-8 EN 2003-8 EN 2860-1 EN 2950 Aerospace series - Test methods for metallic materials - Part 1 - Tensile testing at ambient te
9、mperature 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 rupture testing 2, Aerospace series - Test methods for metallic materials - Part 8 - Microgr
10、aphic determination of grain size Aerospace series - Test methods for steel, titanium, titanium alloys and heat resisting alloy products - Part 8 - Ultrasonic inspection of billets, bars, plates and forgings 2, Aerospace series - Heat resisting alloys - Forging stock and forgings - Technical specifi
11、cation - Part 1 - General requirements Aerospace series - Test method - Heat resisting alloys - Wrought semi-finished product and parts - Condition for macrographic and micrographic examination - Atlas of structures and defects 2, 1) Published as AECMA pre-standard at the date of publication of this
12、 standard 2) In preparation at the date of publication of this standard CEN PRENS28bO PARTS2 93 m 3404589 0050892 901 m prEN 2860-2 Page 4 3 Manufacture The method of manufacture used shall be in accordance with the requirements of the material standard and the manufacturing schedule. 3.1 Alloy manu
13、facture 3.1 .I Charge make-up The primary melting charge shall consist of pure raw material and/or recycled scrap. The pure raw materials shall be obtained through mineral transformation procedures approved by the purchaser. The origin, the nature and proportions of the material constituting the cha
14、rge shall be defined in the manufacturing schedule. The materials constituting the charge shall be supplied in accordance with a procedure which shall define the requirements for batching, inspection and recording of results. The raw materials and the scrap shall only be purchased from suppliers app
15、roved by the manufacturer for each of them. The approval of suppliers shall be made in accordance with written procedures defined in the quality assurance system of the manufacturer. Internal scrap shall be inspected and processed in accordance with written procedures approved by the user. 3.1.2 Pro
16、cess The process for obtaining the specified chemical composition shall be defined and be the subject of a frozen internal procedure. 3.2 Manufacture of ingots The ingots of the first melt are manufactured from one single charge. The ingots issued from remelting shall all be manufactured from one si
17、ngle ingot from the first melt. In case of an electroslag remelting, the composition of the slag shall be monitored and the relevant inspection procedure shall be written and frozen by the manufacturer. 3.3 Manufacture of forging stock All forging stock shall be mechanically hot worked with a minimu
18、m forging ratio of 3 : 1, by rolling, drawing and/or up setting, unless otherwise specified on the order or the manufacturing schedule. - -_ CEN PREN*ZbO PARTx2 93 M 340q589 0050893 848 = prEN 2860-2 Page 5 4 Inspection and testing 4.1 Non destructive tests 4.1 .1 Dimensions and tolerances The dimen
19、sions and tolerances of the products shall be defined in the order. The frequency of examination adopted by the manufacturer shall be sufficient to permit him to certify compliance with the requirements. 4.1.2 External defects The forging stock shall be visually inspected to detect possible surface
20、defects. The whole surface of each product shall be examined. The surface defects shall be removed by local dressing up to 3% of the nominal diameter. Local dressing shall not affect the sensitivity of any ultrasonic test which may be required. The dressed areas shall be re-examined to check that th
21、e defects have been removed. 4.1.3 Internal defects When required by the material standard or the order, the forging stock shall be ultrasonically tested in accordance to EN 2003-8.The whole surface of each product shall be examined. Unless otherwise specified, the test method and the acceptance lev
22、el shall be as required by the material standard or the order. 4.2 Destructive tests 4.2.1 Mechanical tests When required by the material standard or inspection schedule, mechanical testing shall be carried out . The heat treatment of samples shall be carried out in accordance with the requirements
23、of EN 2860-1, and the tests along 4.2.1.1 to 4.2.1.3. Unless otherwise specified, one sample shall be taken from the forging stock corresponding to the top of the original ingot. Testing shall be performed on proportional round test samples. The results shall comply with the requirements of the mate
24、rial standard. 4.2.1.1 Tensile test at ambient temperature Tests shall be carried out in conformity with EN 2002-1. CEN PREN*ZBbO PART*Z 93 3404589 0050894 784 = prEN 2860-2 Page 6 4.2.1.2 Tensile test at elevated temperature Tests shall be carried out in conformity with EN 2002-2. 4.2.1.3 Creep and
25、 creep rupture tests Tests shall be carried out in conformity with EN 2002-5. 4.2.2 Structure, segregation and inclusions When required by the material standard or inspection schedule, - macrographic and micrographic examinations shall be carried out in accordance with EN 2950, - grain size measurem
26、ent shall be carried out in accordance with EN 2002-8. The acceptance criteria and re-test procedures shall be defined by the order ar the inspection schedule. Unless otherwise specified, one sample shall be taken from the forging stock corresponding to the top of the original ingot. The results sha
27、ll meet the requirements of the material standard. 5 Marking All products shall bear the following identification marking : - material standard number; - cast I ingot number; - bar / billet identification number; - delivery condition code; - identification of the manufacturer and if necessary, of th
28、e plant; - inspectors stamp. The marking shall be hard stamped at least once on each product. CEN PREN*Z8b PART*Z 93 = 3404589 0050895 bL0 prEN 2860-2 Page 7 Ultrasonic inspection Table 1 - Summary of requirements EN 2003-8 EN 2002-1 Requirements Paragraph Creep and creep rupture Structure Grain siz
29、e Marking -+- 4.2.1.3 4.2.2 5 Chemical composition Creep and stress rupture See EN 2860-1 EN 2002-5 Dimensions and tolerances 4.1.1 External defects 4.1.2 Internal defects 4.1.3 Tensile test at 3mbient temperature Tensile test at elevated temperature 4.2.1.1 4.2.1.2 Inspection / Testing Method 1 Standard Appropriate method I - Visual Tensile i -t- I EN 2950 EN 2002-8 Metallographic Visual -_ I Frequency 1 per cast See 4.1.1 100% See 4.2.1 See 4.2.2 See 5
