1、Designation:B21416Standard Test Method forSieve Analysis of Metal Powders1This standard is issued under the fixed designation B214;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indi
2、cates 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 test method covers the dry sieve analysis of metalpowders,using sieves wit
3、h openings ranging from 45 to 850micrometres.1.2 This test method is based on a particular type ofmechanical sieve shaker(see 5.2).Other types of sieve shakersare also available,but their precision and reproducibility havenot been determined.1.3 The values stated in SI units are to be regarded as th
4、estandard.The values given in parentheses are for informationonly.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applic
5、a-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2B212 Test Method for Apparent Density of Free-FlowingMetal Powders Using the Hall Flowmeter FunnelB215 Practices for Sampling Metal PowdersB243 Terminology of Powder MetallurgyB329 Test Method for Apparent Dens
6、ity of Metal Powdersand Compounds Using the Scott VolumeterB417 Test Method for Apparent Density of Non-Free-Flowing Metal Powders Using the Carney FunnelB703 Test Method for Apparent Density of Metal Powdersand Related Compounds Using the Arnold MeterE11 Specification for Woven Wire Test Sieve Clot
7、h and TestSievesE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE1638 Terminology Relating to Sieves,Sieving Methods,and Screening Media2.2 MPIF Standard:MPIF 05 Determination of Sieve Analysis of Metal Pow-ders33.Terminology3.1 DefinitionsUseful defin
8、itions of terms relating to pow-der metallurgy are found in B243 and those relating to sieveanalysis are found in E1638.4.Significance and Use4.1 The particle size distribution of a metal powder affectsits behavior in P/M processing and other applications of thesematerials.The test method may be par
9、t of the purchaseagreement between powder supplier and user,or it may be aninternal quality control test for either.5.Apparatus5.1 SievesSelect a set of standard sieves from the tableentitled,“U.S.Standard Series Test Sieves.”These shallconform to Specification E11 and be 203 mm in diameter.Inadditi
10、on to the sieves listed in Table 1,a cover and collectionpan are also required.NOTE1The 203 mm diameter sieve is most commonly referenced asan 8 in.diameter sieve.8 in.diameter sieves do not nest with 200 mmdiameter sieves.5.2 Sieve ShakerA mechanically operated,single eccen-tric sieve shaker shall
11、be used that imparts to the set of sievesa rotary motion and a tapping action of uniform speed.Thenumber of rotations per minute shall be between 270 and 300.The number of taps per minute shall be between 140 and 160.The hold down arm of the sieve shaker shall be fitted with ashock absorbing plug to
12、 receive the impact of the tappingdevice.The entire apparatus shall be rigidly mounted bybolting to a solid foundation,preferably of concrete.1This test method is under the jurisdiction of ASTM Committee B09 on MetalPowders and Metal Powder Products and is the direct responsibility of Subcom-mittee
13、B09.02 on Base Metal Powders.Current edition approved April 1,2016.Published April 2016.Originallyapproved in 1946.Last previous edition approved in 2015 as B214 15.DOI:10.1520/B0214-16.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.
14、org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from Metal Powder Industries Federation(MPIF),105 College RoadEast,Princeton,NJ 08540,http:/www.mpif.org.*A Summary of Changes section appears at the end of this standar
15、dCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 NOTE2Use of a sound proof enclosure is recommended.5.3 BalanceAbalance readable to 0.01 g,with a minimumcapacity of 150 g,to be used for determining the mass of thetest portion and retained
16、 portions to the nearest 0.1 g.6.Test Portion6.1 The size of the test portion shall be 90 to 110 g for anymetal powder having an apparent density greater than or equalto 1.50 g/cm3when determined in accordance with TestMethod B212,B329,B417,or B703.A portion of 40 to 60 gshall be used when the apparent density of the powder is lessthan 1.50 g/cm3.The test portion should be obtained inaccordance with Practices B215.7.Procedure7.1 Examine the sieves to make sure that they are notdamaged and are cl
