ASTM B212-2013 Standard Test Method for Apparent Density of Free-Flowing Metal Powders Using the Hall Flowmeter Funnel《使用霍尔流量计漏斗的自由流动性金属粉末表观密度的标准试验方法》.pdf
《ASTM B212-2013 Standard Test Method for Apparent Density of Free-Flowing Metal Powders Using the Hall Flowmeter Funnel《使用霍尔流量计漏斗的自由流动性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 B212-2013 Standard Test Method for Apparent Density of Free-Flowing Metal Powders Using the Hall Flowmeter Funnel《使用霍尔流量计漏斗的自由流动性金属粉末表观密度的标准试验方法》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: B212 12B212 13Standard Test Method forApparent Density of Free-Flowing Metal Powders Using theHall Flowmeter Funnel1This standard is issued under the fixed designation B212; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revisi
2、on, the year of 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 Department of Defense.1. Scope*1.1 This test method des
3、cribes a procedure for determining the apparent density of free-flowing metal powders, and mixedpowders; and is suitable for only those powders that will flow unaided through the specified Hall Flowmeter funnel.1.2 With the exception of the values for mass, volume, and density, for which the use of
4、the gram and the cubic centimeter unitsis the long-standing industry practice, the values stated in inch-pound units are to be regarded as standard. The values given inparentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.3 This
5、 standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.
6、1 ASTM Standards:2B215 Practices for Sampling Metal PowdersB243 Terminology of Powder MetallurgyB873 Test Method for Measuring Volume of Apparent Density Cup Used in Test Methods B 212, B 329, and B 417E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method3
7、. Terminology3.1 DefinitionsFor definitions of terms used in this test method, see Terminology B243. Additional descriptive PMinformation is available in the Related Materials section of VolVol. 02.05 of the Annual Book of ASTM Standards.4. Summary of Test Method4.1 A volume of powder is permitted t
8、o flow into a container of definite volume under controlled conditions. The mass ofpowder per unit volume is determined and reported as apparent density, Hall (ADH).5. Significance and Use5.1 This test method provides a guide for evaluation of an important physical characteristic of a powder known a
9、s the apparentdensity. The measured apparent density bears a relationship to the mass of powder that will fill a fixed volume die cavity. Thedegree of correlation between the results of this test and the performance of powders during use may vary with each particularapplication. Note, however, that
10、the presence of moisture, oils, stearic acid, stearates, waxes, and the temperature of the powdermass may alter the physical characteristics of the powder.1 This test method is under the jurisdiction ofASTM Committee B09 on Metal Powders and Metal Powder Products and is the direct responsibility of
11、Subcommittee B09.02on Base Metal Powders.Current edition approved April 1, 2012April 1, 2013. Published September 2012June 2013. Originally approved in 1946. Last previous edition approved in 20092012 asB212 09B212 12. . DOI: 10.1520/B0212-12.10.1520/B0212-13.2 For referencedASTM standards, visit th
12、eASTM website, www.astm.org, or contactASTM 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
13、 indication of what changes have been made 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
14、 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, West Conshohocken, PA 19428-2959. United States16. Apparatus6.1 Powder Flowmeter Funnel3A Hall Flowmeter funnel (Fig. 1) having a ca
15、librated orifice.6.2 Density CupCupA cylindrical brass cup (Fig. 2) having a nominal capacity of 25 cm3. The actual cup volume shall bedetermined according to Test Method B873. If the measured volume of the cup is outside the tolerance in Fig. 2(25 6 0.03 cm3) the cup shall not be used.6.3 Stand3Ast
16、and (Fig. 1) to support the Hall Flowmeter funnel concentric with the density cup so that the bottom of the HallFlowmeter funnel orifice is approximately 25 mm (1 in.)1 in. (25 mm) above the top of the density cup when the apparatus isassembled as shown in Fig. 1.6.4 WorkbenchA level, vibration-free
17、 table or workbench to support the powder flowmeter standstand.6.5 BalanceA balance, readable to 0.001 g, having a capacity of at least 200 g capable of determining the mass to the nearest0.01 g.6.6 Spatula or straight edgeAnon-magnetic spatula or straight edge of suitable dimensions for leveling of
18、f the excess powderon top of the density cup.7. Test Portion7.1 The test portion shall consist of a volume of approximately 30 to 40 cm3 of metal powder obtained in accordance withPractices B215.3 The sole source of supply of the apparatus known to the committee at this time is ACuPowder Internation
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