ASTM B212-1999(2006) Standard Test Method for Apparent Density of Free-Flowing Metal Powders Using the Hall Flowmeter Funnel《自由流动的金属粉末表观密度的标准试验方法》.pdf
《ASTM B212-1999(2006) Standard Test Method for Apparent Density of Free-Flowing Metal Powders Using the Hall Flowmeter Funnel《自由流动的金属粉末表观密度的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM B212-1999(2006) Standard Test Method for Apparent Density of Free-Flowing Metal Powders Using the Hall Flowmeter Funnel《自由流动的金属粉末表观密度的标准试验方法》.pdf(3页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: B 212 99 (Reapproved 2006)Standard Test Method forApparent Density of Free-Flowing Metal Powders Using theHall Flowmeter Funnel1This standard is issued under the fixed designation B 212; the number immediately following the designation indicates the year oforiginal adoption or, in the c
2、ase of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This te
3、st method describes a procedure for determiningthe apparent density of free-flowing metal powders and issuitable for only those powders that will flow unaided throughthe specified Hall flowmeter funnel.1.2 This standard does not purport to address all of thesafety concerns, if any, associated with i
4、ts use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2B 215 Practices for Sampling Metal PowdersB 243 Terminology of Powder
5、MetallurgyB 873 Test Method for Measuring Volume of ApparentDensity Cup Used in Test Methods B 212, B 329, and B4173. Terminology3.1 DefinitionsFor definitions of terms used in this testmethod, see Terminology B 243.4. Summary of Test Method4.1 Avolume of powder is permitted to flow into a container
6、of definite volume under controlled conditions. The mass ofpowder per unit volume is determined and reported as apparentdensity, Hall.5. Significance and Use5.1 This test method provides a guide for evaluation of theapparent density physical characteristic of powders. The den-sity measured bears a r
7、elationship to the mass of powder thatwill fill a fixed volume press cavity when parts are being made.The degree of correlation between the results of this test andthe quality of powders in use will vary with each particularapplication.6. Apparatus6.1 Powder Flowmeter Funnel3A Hall flowmeter funnel(
8、Fig. 1) having a calibrated orifice.6.2 Density Cup3A cylindrical brass cup (Fig. 2) having acapacity of 25 cm3. The actual cup volume shall be determinedaccording to Test Method B 873.6.3 Stand3A stand (Fig. 1) to support the Hall flowmeterfunnel concentric with the density cup so that the bottom o
9、f theHall flowmeter funnel orifice is approximately 25 mm (1 in.)above the top of the density cup when the apparatus isassembled as shown in Fig. 1.6.4 BaseA level, vibration-free base to support the pow-der flowmeter.6.5 Balance, having a capacity of at least 200 g and asensitivity of 0.01 g.7. Tes
10、t Specimen7.1 The test specimen shall consist of a volume of approxi-mately 30 to 40 cm3of metal powder obtained in accordancewith Practices B 215.7.2 The test specimen shall be tested as sampled. Note,however, that temperature, moisture, oils, stearic acid, stear-ates, waxes, and so forth, may alte
11、r the characteristics of thepowder.8. Procedure8.1 Weigh the empty density cup to the nearest 0.1 g or,alternatively, place the empty density cup on the balance andtare the balance to zero.1This test method is under the jurisdiction of ASTM Committee B09 on MetalPowders and Metal Powder Products and
12、 is the direct responsibility of Subcom-mittee B09.02 on Base Metal Powders.Current edition approved April 1, 2006. Published April 2006. Originallyapproved in 1946. Last previous edition approved in 1999 as B 212 99.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact AST
13、M Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The sole source of supply of the apparatus known to the committee at this timeisAccu Powder International, LLC, 901 LehighAve., Union, NJ 07083
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