ASTM A982 A982M-2005 Standard Specification for Steel Forgings Stainless for Compressor and Turbine Airfoils.pdf

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1、Designation: A 982/A 982M 05Standard Specification forSteel Forgings, Stainless, for Compressor and TurbineAirfoils1This standard is issued under the fixed designation A 982/A 982M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, t

2、he year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers stainless steel forgings forcompressor and turbine bucket, blade, and airfoil a

3、pplications.1.2 This specification is expressed in both inch-pound unitsand in SI units; however, unless the purchase order or contractspecifies the applicable M designation (SI units), the inch-pound units shall apply. The values stated in either inch-poundunits or SI units are to be regarded separ

4、ately as standard.Within the text, the SI units are shown in brackets. The valuesstated in each system may not be exact equivalents; therefore,each system shall be used independently of the other. Combin-ing values from the two systems may result in nonconformancewith the standard.2. Referenced Docu

5、ments2.1 ASTM Standards:2A 275/A 275M Test Method for Magnetic Particle Exami-nation of Steel ForgingsA 788 Specification for Steel Forgings, General Require-mentsA 994 Guide for Editorial Procedures and Form of ProductSpecifications for Steel, Stainless Steel, and RelatedAlloysE 381 Method of Macro

6、etch Testing Steel Bars, Billets,Blooms, and ForgingsE 562 Test Method for Determining Volume Fraction bySystematic Manual Point Count3. Ordering Information3.1 In addition to the ordering information required bySpecification A 788, the purchaser shall include a sketch orwritten description of the f

7、orging with the inquiry and order.4. General Requirements4.1 Materials supplied to this specification shall conform tothe requirements of Specification A 788, which outlines addi-tional ordering information, manufacturing requirements, test-ing and retesting methods and procedures, marking, certific

8、a-tion, product analysis variations and additional supplementaryrequirements.4.2 If the requirements of this specification are in conflictwith the requirements of Specification A 788, the requirementsof this specification shall prevail.5. Manufacture5.1 Melting ProcessAll melting processes of Specif

9、ica-tion A 788 are permitted unless Supplementary RequirementS1 is invoked by the purchaser.5.2 Forging ProcessEither the closed impression die orthe open die forging processes may be utilized unless thepurchaser specifies one or the other.5.2.1 Forging TemperatureThe maximum part tempera-ture durin

10、g forging shall be 2150F 1175C.5.3 Heat TreatmentHeat treating all forgings is requiredin accordance with Table 1 to develop the required mechanicalproperties.5.3.1 Number of Heat TreatmentsTwo complete heattreatments, consisting of an austenitize, quench, and temper,are permitted. Purchaser approva

11、l is required prior to anyadditional heat treatments.5.3.2 Temperature VariationHeat treating temperaturesshall be controlled in the range of 625F 614C.5.4 Stress ReliefWhen heat treatment for mechanicalproperties is followed by straightening, a stress-relieving heattreatment is required at a temper

12、ature meeting the requirementsof Table 1.5.4.1 Quenching after Stress ReliefWater or oil quenchingof stress-relieved forgings is prohibited.6. Chemical Composition6.1 The steel shall conform to the requirements for chemicalcomposition prescribed in Table 2.1This specification is under the jurisdicti

13、on of ASTM Committee A01 on Steel,Stainless Steel, and Related Alloys and is the direct responsibility of SubcommitteeA01.06 on Steel Forgings and Billets.Current edition approved March 1, 2005. Published March 2005. Originallypublished in 1998. Last previous edition approved in 2002 as A 982 02.2Fo

14、r referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standa

15、rd.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7. Mechanical Properties7.1 Tension, Impact, and Hardness TestsAll testing shallbe performed after heat treatment and stress relief, as appli-cable. The test specimens shall meet the

16、requirements of Table3.7.1.1 Number of TestsA minimum of two forgings fromeach lot shall be randomly selected for longitudinal tensile,impact, and hardness testing. Hardness values of the tensiontest specimen shall be reported with the tensile data.7.1.1.1 Lot SizeA lot shall consist of all forgings

17、 of thesame size from one electric furnace heat of steel and heattreated either in the same charge in either a batch furnace or acontinuous type furnace.7.1.1.2 Continuous Heat Treating FurnacesTest forgingsshall be taken from each of the first and last push or tray to exitthe furnace. Additional fo

18、rgings shall be taken so that themaximum time between samples is 4 h.7.1.1.3 Test LocationsOne tension test specimen and oneset of three impact test specimens shall be machined from thecenter portion of the air foil vane section.TABLE 1 Heat Treatment, F CGrade A Grade B Grade C Grade D Grade E Grad

19、e FClasses1 stainless steel forgings; turbineairfoilsSUPPLEMENTARY REQUIREMENTSThe following supplementary requirements shall apply only when specified by the purchaser in theinquiry, contract, and order. Details of these supplementary requirements shall be agreed upon by themanufacturer and purchas

20、er.S1. Secondary Melting and RefiningS1.1 ESR or VAR is required. Use of either is permittedunless otherwise specified.S2. Ingot Chemical AnalysisS2.1 If consumable electrode remelting is used, then chemi-cal analyses of each remelted ingot shall meet the chemicalcomposition requirements listed and

21、shall be reported.S3. MacrostructureS3.1 Samples shall be taken from the top and bottom of thefirst and last ingot of each heat. The structure of the startingbillets shall meet the criteria of Method E 381, S-3, R-2, C-3#36 in.2230 cm2 and S-3, R-3, C-3 36 in.2230 cm2.S4. Root Attachment Zone Mechan

22、ical PropertiesS4.1 Testing for mechanical properties of the root attach-ment area is required. The type, number, location, and orien-tation of the tests shall be specified by the purchaser.S5. Magnetic Particle InspectionS5.1 Each forging shall be magnetic particle inspected inaccordance with Test

23、Method A 275/A 275M. The maximumacceptable indication size shall be18 in. 3 mm unlessotherwise specified by the purchaser.S6. Ultrasonic InspectionS6.1 Ultrasonic inspection is required. The test method,location, and acceptance criteria shall be as agreed upon by thepurchaser and producer.S7. Micros

24、tructureS7.1 The microstructure shall be uniformly fine grain tem-pered martensite with no more than 1 % delta ferrite.S7.2 Metallographic inspection shall be performed at 100xmagnification to determine the metallurgical structure, grainsize, decarburization, and delta ferrite content. Visual estima

25、-tion for the volume fraction of delta ferrite of various repre-sentative areas of examination is acceptable. When the visualestimation method indicates the delta ferrite content is greaterthan the allowed limit, the manufacturer may employ TestMethod E 562 for determining the acceptability of a lot

26、.S7.3 A specimen shall be removed from the airfoil sectionon one test forging per heat treat lot. The plane of polish of thespecimen shall be parallel to the axial centerline of the forging.The area examined shall include both the concave and convexvane surfaces.A 982/A 982M 053S7.4 Surface decarbur

27、ization of forgings shall not exceed0.06 in. 1.5 mm.S8 Hardness TestingS8.1 One hardness test is required on the surface of theturbine rotor attachment portion on each forging. When speci-fied by the purchaser, forgings shall be hardness tested forsurface hardness on the air foil vane section.S9. Mi

28、nimum Hardness RequirementsS9.1 When agreed upon by the purchaser and producer, aminimum hardness value is required.SUMMARY OF CHANGESCommittee A01 has identified the location of the following changes to this standard since A 982/A 982M - 02that may impact the use of this standard (Approved March 1,

29、 2005).(1) Added dual units to title, new 1.2, rationalized metricvalues in Table 1 and Table 3 per Guide A 994. Added metricvalues to S3, S5, and S7.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. User

30、s of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every

31、five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technica

32、l committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).A 982/A 982M 054