ASTM A891 A891M-2016 Standard Specification for Precipitation Hardening Iron Base Superalloy Forgings for Turbine Rotor Disks and Wheels《涡轮机转子盘和轮子用沉淀硬化铁基高温合金锻件的标准规格》.pdf
《ASTM A891 A891M-2016 Standard Specification for Precipitation Hardening Iron Base Superalloy Forgings for Turbine Rotor Disks and Wheels《涡轮机转子盘和轮子用沉淀硬化铁基高温合金锻件的标准规格》.pdf》由会员分享,可在线阅读,更多相关《ASTM A891 A891M-2016 Standard Specification for Precipitation Hardening Iron Base Superalloy Forgings for Turbine Rotor Disks and Wheels《涡轮机转子盘和轮子用沉淀硬化铁基高温合金锻件的标准规格》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: A891/A891M 10 (Reapproved 2015)A891/A891M 16Standard Specification forPrecipitation Hardening Iron Base Superalloy Forgings forTurbine Rotor Disks and Wheels1This standard is issued under the fixed designation A891/A891M; the number immediately following the designation indicates the ye
2、arof original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope Scope*1.1 This specification covers precipitation hardeni
3、ng iron base superalloy forgings which are primarily intended for use asturbine rotor disks and wheels.1.2 Two heat treatments are covered. Selection will depend upon design, service conditions, mechanical properties, and elevatedtemperature characteristics.1.3 All of the provisions of Specification
4、 A788/A788M, apply, except as amended herein.1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from th
5、etwo systems may result in non-conformance with the standard.2. Referenced Documents2.1 ASTM Standards:2A788/A788M Specification for Steel Forgings, General RequirementsE112 Test Methods for Determining Average Grain SizeE139 Test Methods for Conducting Creep, Creep-Rupture, and Stress-Rupture Tests
6、 of Metallic MaterialsE165/E165M Practice for Liquid Penetrant Examination for General IndustryE292 Test Methods for Conducting Time-for-Rupture Notch Tension Tests of Materials3. Ordering Information3.1 Orders for material under this specification shall include the following:3.1.1 ConditionSee Sect
7、ion 4.3.1.2 Stress Rupture TestParameters for material furnished in condition 2 of 7.3.3.3.1.3 Forging DrawingEach forging shall be manufactured in accordance with a drawing furnished by the purchaser showingthe dimensions of the forging and the location of mechanical test specimens.3.1.4 Include th
8、e information specified in Specification A788/A788M.4. Condition and Heat Treatment4.1 The forgings covered in this specification may be ordered in two different solution treated and aged conditions:4.1.1 Type 1:4.1.1.1 Solution anneal at 1650 6 25F 900 6 14C for 2 to 5 h at temperature liquid quenc
9、h.4.1.1.2 Precipitation harden at 1420 6 15F 770 6 8C for 16 h at temperature air cool; 1200 6 15F 650 6 8C for 16h at temperature air cool.4.1.2 Type 2:4.1.2.1 Solution anneal at 1800 6 25F 980 6 14C for 2 to 5 h at temperature liquid quench.4.1.2.2 Precipitation harden at 1420 6 15F 770 6 8C for 1
10、6 h at temperature air cool; 1200 6 15F 650 6 8C for 16h at temperature air cool.1 This specification is under the jurisdiction of Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.06 onSteel Forgings and Billets.Current edition approved
11、March 1, 2015May 1, 2016. Published March 2015May 2016. Originally approved in 1988. Last previous edition approved in 20102015 asA891/A891M 10.A891/A891M 10(2015). DOI: 10.1520/A0891_A0891M-10R15.10.1520/A0891_A0891M-16.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contact
12、ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been m
13、ade to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A
14、 Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15. Manufacture5.1 The material shall be made by vacuum melting followed by consumable electrode vacuum arc or electroslag r
15、emelting asagreed upon between producer and user.5.2 The forgings shall be upset forged so that the axis of the disk corresponds with that of the ingot.6. Chemical Requirements6.1 Heat AnalysisEach heat shall be analyzed by the manufacturer in accordance with Specification A788/A788M. Thechemical co
16、mposition shall conform to the requirements specified in Table 1.6.2 Product AnalysisThe purchaser may obtain a product analysis, representing each heat or multiple heat, in accordance withthe provisions of Specification A788/A788M.7. Mechanical Properties7.1 The forgings shall conform to the mechan
17、ical property requirements specified in Table 2 after heat treatment as prescribedin 4.1.7.2 Tension and HardnessTension and hardness testing shall be conducted in accordance with Specification A788/A788M.7.3 Stress Rupture:7.3.1 Combination smooth and notched bar specimens using 0.252 in. 6.4 mm di
18、ameter bars shall be tested to rupture inaccordance with Test Methods E292. Rupture must occur in the smooth section of each specimen. After 100 h, samples may beuploaded in 5-ksi 35-MPa increments in 8 to 16 h intervals.7.3.2 Material supplied as Type 1 shall meet the stress rupture requirements sp
19、ecified in Table 3.7.3.3 Material supplied as Type 2 shall meet the stress rupture requirements of either Test A or Test B of Table 3 as specifiedby the purchaser.7.4 Creep:7.4.1 A creep test shall be performed in accordance with Test Methods E139 on a 0.252 in. 6.4 mm diameter smooth bar.7.4.2 The
20、material shall meet the requirements specified in Table 4 after heat treatment as prescribed in 4.1.7.5 Number of TestsThe testing frequency shall be as follows with a lot being defined as not more than 50 pieces of the samepart made from the same heat of material to the same forging parameters, for
21、ged within an 8 h period, and heat treated together:7.5.1 For forgings weighing less than 500 lb 225 kg each, one tension, stress rupture, and creep test shall be made on oneforging per lot. In addition, two hardness tests shall be made on each piece in the lot.7.5.2 For forgings weighing 500 to 200
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