ASTM B925-2003 Standard Practices for Production and Preparation of Powder Metallurgy (P M) Test Specimens《粉末冶金(P M)试样的生产、制备的标准实施规程》.pdf
《ASTM B925-2003 Standard Practices for Production and Preparation of Powder Metallurgy (P M) Test Specimens《粉末冶金(P M)试样的生产、制备的标准实施规程》.pdf》由会员分享,可在线阅读,更多相关《ASTM B925-2003 Standard Practices for Production and Preparation of Powder Metallurgy (P M) Test Specimens《粉末冶金(P M)试样的生产、制备的标准实施规程》.pdf(15页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: B 925 03Standard Practices forProduction and Preparation of Powder Metallurgy (P/M) TestSpecimens1This standard is issued under the fixed designation B 925; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of l
2、ast revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 These standard practices cover the specifications forthose uniaxially compacted test specimens that are used inASTM st
3、andards, the procedures for producing and preparingthese test specimens, and reference the applicable standards.1.2 Basic tool design and engineering information regardingthe tooling that is required to compact the test specimens andmachining blanks are contained in the annexes.1.3 This standard is
4、intended to be a comprehensive one-source document that can be referenced by ASTM test methodsthat utilize P/M test specimens and in ASTM P/M materialspecifications that contain the engineering data obtained fromthese test specimens.1.4 These practices are not applicable to metal powder testspecimen
5、s that are produced by other processes such as coldisostatic pressing (CIP), hot isostatic pressing (HIP), powderforging (P/F) or metal injection molding (MIM). They do notpertain to cemented carbide materials.1.5 Detailed information on P/M presses, compacting tool-ing and sintering furnaces, their
6、 design, manufacture and useare not within the scope of these practices.1.6 Test specimen and die cavity dimensions shown ininch-pound units are to be regarded as standard and areapplicable to the referenced ASTM test methods and materialspecifications. Values in SI units are shown in parentheses an
7、dresult from conversion in accordance with IEEE/ASTM Stan-dard SI-10. They may be approximate and are only forinformation.1.7 This standard may involve hazardous materials, opera-tions, and equipment. This standard does not purport toaddress all of the safety concerns, if any, associated with itsuse
8、. It is the responsibility of the user of this standard toestablish appropriate safety and health practices and deter-mine the applicability of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:A 34/A 34M Practice for Sampling and Procurement Test-ing of Magnetic Material
9、s2A 341/A 341M Test Method for Direct-Current MagneticProperties of Materials Using D-C Permeameters and theBallistic Test Methods2A 596/A 596M Test Method for Direct-Current MagneticProperties of Materials Using the Ballistic Method andRing Specimens2A 773/A 773M Test Method for dc Magnetic Propert
10、ies ofMaterials Using Ring and Permeameter Procedures withElectronic Hysteresigraphs2A 811 Specification for Soft Magnetic Iron Parts Fabricatedby Powder Metallurgy (P/M) Techniques2A 839/A 839M Specification for Iron Phosphorus PowderMetallurgy (P/M) Parts for Soft Magnetic Applications2A 904 Speci
11、fication for 50 Nickel-50 Iron Powder Metal-lurgy (P/M) Soft Magnetic Alloys2A 927/A 927M Test Method for Alternating-Current Mag-netic Properties of Torroidal Core Specimens Using theVoltmeter-Ammeter-Wattmeter Method2B 215 Practices for Sampling Finished Lots of Metal Pow-der3B 243 Terminology of
12、Powder Metallurgy3B 312 Test Method for Green Strength for CompactedMetal Powder Specimens3B 328 Test Method for Density, Oil Content, and Intercon-nected Porosity of Sintered Metal Structural Parts andOil-Impregnated Bearings3B 331 Test Method for Compressibility of Metal Powders inUniaxial Compact
13、ion3B 438/B 438M Specification for Sintered Bronze Bearings(Oil-Impregnated)3B 439 Specification for Iron-Base Sintered Bearings (Oil-Impregnated)3B 528 Test Method for Transverse Rupture Strength ofMetal Powder Specimens3B 595 Specification for Sintered Aluminum StructuralParts3B 610 Test Method fo
14、r Measuring Dimensional Changes of1This practice is under the jurisdiction of ASTM Committee B09 on MetalPowders and Metal Powder Products and is the direct responsibility of Subcom-mittee B09.02 on Base Metal Powders.Current edition approved April 10, 2003. Published June 2003.2Annual Book of ASTM
15、Standards, Vol 03.04.3Annual Book of ASTM Standards, Vol 02.05.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Metal Powder Specimens3B 612 Specification for Iron Bronze Sintered Bearings (Oil-Impregnated)3B 715 Specification for Sin
16、tered Copper Structural Parts forElectrical Conductivity Applications3B 782 Specification for Iron Graphite Sintered Bearings(Oil-Impregnated)3B 783 Specification for Materials for Ferrous Powder Met-allurgy (P/M) Structural Parts3B 817 Specification for Powder Metallurgy (P/M) TitaniumAlloy Structu
17、ral Components3B 823 Specification for Materials for Nonferrous PowderMetallurgy (P/M) Structural Parts3B 853 Specification for Powder Metallurgy (P/M) BoronStainless Steel Structural Components3E 8 Test Methods for Tension Testing of Metallic Materials4E 9 Test Methods of Compression Testing of Met
18、allic Ma-terials at Room Temperature4E 18 Test Methods for Rockwell Hardness and RockwellSuperficial Hardness of Metallic Materials4E 23 Test Methods for Notched Bar Impact Testing ofMetallic Materials4E 228 Test Method for Linear Thermal Expansion of SolidMaterials with a Vitreous Silica Dilatomete
19、r2E 1876 Test Method for Dynamic Youngs Modulus, ShearModulus and Poissons Ratio by Impulse Excitation ofVibration42.2 IEEE/ASTM Standard:SI-10 Standard for Use of the International System of Units(SI): The Modern Metric System22.3 MPIF Standard:Standard 56 Method for Determination of Rotating BeamF
20、atigue Endurance Limit in Powder Metallurgy Materials53. Terminology3.1 DefinitionsDefinitions of powder metallurgy termscan be found in Terminology B 243. Additional descriptiveinformation is available in the Related Materials section of Vol02.05 of the Annual Book of ASTM Standards.4. Summary of P
21、ractice4.1 These practices describe the production, by pressing andsintering metal powders, and the preparation, by machiningsintered blanks, of test specimens used to measure properties ofmetal powders and sintered materials.5. Significance and Use5.1 Test specimens are used to determine the engine
22、eringproperties of P/M materials, for example, tensile strength,ductility, impact energy, etc.; property data that are essential tothe successful use of P/M material standards. Processing P/Mtest specimens under production conditions is the most efficientmethod by which to obtain reliable P/M materi
23、al property datasince in most cases it is impractical or impossible to cut testbars from sintered parts.5.2 The performance characteristics of metal powders, forexample, compressibility, green strength and dimensionalchanges associated with processing are evaluated using P/Mtest specimens under cont
24、rolled conditions. The data obtainedare important to both metal powder producers and P/M partsmanufacturers.5.3 P/M test specimens play a significant role in industrialquality assurance programs. They are used to compare prop-erties of a new lot of metal powder with an established lot inan acceptanc
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