ASTM B438-2017 Standard Specification for Bronze-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)《铜基粉末冶金(PM)轴承(油浸)的标准规格》.pdf
《ASTM B438-2017 Standard Specification for Bronze-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)《铜基粉末冶金(PM)轴承(油浸)的标准规格》.pdf》由会员分享,可在线阅读,更多相关《ASTM B438-2017 Standard Specification for Bronze-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)《铜基粉末冶金(PM)轴承(油浸)的标准规格》.pdf(30页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: B438 13B438 17Standard Specification forBronze-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)1This standard is issued under the fixed designation B438; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year o
2、f last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope*1.1 This specification covers por
3、ous metallic sleeve, flange, thrust and spherical bronze-base bearings that are produced frommixed metal powders utilizing powder metallurgy (PM) technology and then impregnated with oil to supply operating lubrication.1.2 Included are the specifications for the chemical, physical and mechanical req
4、uirements of those bronze-base PM materialsthat have been developed and standardized specifically for use in the manufacture of these self-lubricating bearings.1.3 This specification is applicable to the purchase of bronze-base bearings (oil-impregnated) that were formerly covered bymilitary specifi
5、cations and are intended for government or military applications. Those additional government requirements thatonly apply to military bearings are listed in the Supplementary Requirements section of this specification.1.4 This specification accompanies Specification B439 that covers the requirements
6、 for Iron-Base Powder Metallurgy (PM)Bearings, (Oil-Impregnated).1.5 Typical applications for bronze-base bearings are listed in Appendix X1.1.6 Bearing dimensional tolerance data are shown in Appendix X2, while engineering information regarding installation andoperating parameters of PM bearings is
7、 included in Appendix X3. Additional useful information on self-lubricating bearings canbe found in MPIF Standard 35, ISO 5755 and the technical literature.21.7 With the exception of density values for which the g/cm3 unit is the industry standard, the values stated in inch-pound unitsare to be rega
8、rded as standard. The values given in parentheses are mathematical conversions to SI units that are provided forinformation only and are not considered standard.1.8 The following safety hazards caveat pertains only to the test methods described in this specification. This standard does notpurport to
9、 address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard toestablish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.1.9 This international standard was developed in acco
10、rdance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM S
11、tandards:3B243 Terminology of Powder MetallurgyB439 Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)B939 Test Method for Radial Crushing Strength, K, of Powder Metallurgy (PM) Bearings and Structural MaterialsB946 Test Method for Surface Finish of Powder Metallurgy (PM)
12、ProductsB962 Test Methods for Density of Compacted or Sintered Powder Metallurgy (PM) Products Using Archimedes PrincipleB963 Test Methods for Oil Content, Oil-Impregnation Efficiency, and Surface-Connected Porosity of Sintered Powder1 This specification is under the jurisdiction of ASTM Committee B
13、09 on Metal Powders and Metal Powder Products and is the direct responsibility of SubcommitteeB09.04 on Bearings.Current edition approved April 1, 2013April 1, 2017. Published May 2013April 2017. Originally approved in 1966. Last previous edition approved in 20082013 asB438 08.B438 13. DOI: 10.1520/
14、B0438-13.10.1520/B0438-17.2 Machine Design Magazine, Vol 54, #14, June 17, 1982, pp. 130-142.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document S
15、ummary 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 made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recomme
16、nds 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 Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700,
17、 West Conshohocken, PA 19428-2959. United States1Metallurgy (PM) Products Using Archimedes PrincipleB966 Test Method for Permeability of Powder Metallurgy (PM) Bearings Using Nitrogen Gas (Withdrawn 2015)4B970 Test Method for Cleanliness of Powder Metallurgy (PM) Bearings and Structural Parts (Withd
18、rawn 2016)4E9 Test Methods of Compression Testing of Metallic Materials at Room TemperatureE29 Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE1019 Test Methods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobal
19、t Alloys byVarious Combustion and Fusion Techniques2.2 MPIF Standard:MPIF Standard 35 Materials Standards for PM Self-Lubricating Bearings42.3 ISO Standard:5ISO 2795 Plain Bearings Made from Sintered MaterialDimensions and TolerancesISO 5755 Sintered Metal Materials - Specifications2.4 Government St
20、andards:MIL-PRF-6085 Lubricating Oil: Instrument, Aircraft, Low Volatility6QPL-6085 Lubricating Oil Instrument, Aircraft, Low Volatility6MIL-PRF-17331 Lubrication Oil, Steam Turbine and Gear, Moderate Service6QPL-17331 Lubricating Oil, Steam Turbine and Gear, Moderate Service6MIL-B-5687 Bearings, Sl
21、eeve, Washers, Thrust, Sintered, Metal Powder, Oil-Impregnated, General Specification For7MS17795 Bearing, Sleeve, Plain, Sintered Bronze, Oil-Impregnated7MS17796 Bearing, Sleeve, Flanged, Sintered Bronze, Oil-Impregnated7MS21783 Bearing, Washer, Thrust, Sintered Bronze, Oil-Impregnated73. Terminolo
22、gy3.1 DefinitionsThe definitions of the terms used in this specification are found in Terminology B243. Additional descriptiveinformation is available in the Related Materials section of Volume 02.05 of the Annual Book of ASTM Standards.4. Classification4.1 This specification uses the established th
23、ree-part alphanumeric PM Material Designation Code to identify the nonferrousmaterials used for self-lubricating PM bearings. The complete explanation of this classification system is presented in Annex A1.4.2 The following standard oil-impregnated bronze-base bearing material compositions are conta
24、ined in this specification:4.2.1 Prefix CTBronze (Low Graphite):CT-1000-K19CT-1000-K26CT-1000-K37CT-1000-K404.2.2 Prefix CTGBronze-Graphite (Medium Graphite):CTG-1001-K17CTG-1001-K23CTG-1001-K30CTG-1001-K344.2.3 Prefix CTGBronze (High Graphite):CTG-1004-K10CTG-1004-K154.2.4 Prefix CTG-MODBronze-Lead
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