1、August 2010 Translation by DIN-Sprachendienst.English price group 8No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、77.160!$j?“1712897www.din.deDDIN EN ISO 3923-1Metallic powders Determination of apparent density Part 1: Funnel method (ISO 3923-1:2008)English translation of DIN EN ISO 3923-1:2010-08Metallpulver Ermittlung der Flldichte Teil 1: Trichterverfahren (ISO 3923-1:2008)Englische bersetzung von DIN EN ISO
3、 3923-1:2010-08Poudres mtalliques Dtermination de la masse volumique apparente Partie 1: Mthode de lentonnoir (ISO 3923-1:2008)Traduction anglaise de DIN EN ISO 3923-1:2010-08SupersedesDIN ISO 3923-1:1980-06www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.
4、Document comprises 10 pages08.10 DIN EN ISO 3923-1:2010-08 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 119 “Powder metallurgy” (Secretariat: SIS, Sweden) in collaboration with Technical Committee CEN/SS M11 “Powder metallur
5、gy” (Secretariat: CMC). The responsible German body involved in its preparation was the Normenausschuss Werkstofftechnologie (Technology of Materials Standards Committee), Working Committee NA 145-01-02 AA Probenahme und Prfverfahren fr Pulver (einschlielich Pulver fr Hartmetalle). The DIN Standard
6、corresponding to the International Standard referred to in this document is as follows: ISO 3923-2 DIN ISO 3923-2 Amendments This standard differs from DIN ISO 3923-1:1980-06 as follows: a) Figure 3 showing the arrangement of the stand with funnel and cup has been added. b) Alternative dimensions of
7、 the cup are also acceptable (5.2). c) The accuracy requirement for the balance has been increased to 0,01 g. d) A volume of at least 100 cm3is now required for the test sample (6.1). e) The as-received condition of the powder has been formulated as a recommendation (6.2). f) Clause 9 “Precision” ha
8、s been included. g) Normative references have been updated. h) The standard has been editorially revised. Previous editions DIN ISO 3923-1: 1980-06 National Annex NA (informative) Bibliography DIN ISO 3923-2, Metallic powders Determination of apparent density Scott volumeter method EUROPEAN STANDARD
9、 NORME EUROPENNE EUROPISCHE NORM EN ISO 3923-1 April 2010 ICS 77.160 Supersedes EN 23923-1:1993English Version Metallic powders - Determination of apparent density - Part 1: Funnel method (ISO 3923-1:2008) Poudres mtalliques - Dtermination de la masse volumique apparente - Partie 1: Mthode de lenton
10、noir (ISO 3923-1:2008) Metallpulver - Ermittlung der Flldichte - Teil 1: Trichterverfahren (ISO 3923-1:2008) This European Standard was approved by CEN on 16 April 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
11、Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, F
12、rench, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croa
13、tia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDI
14、ZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 3923-1:2010: EContents DIN EN ISO 3923-1:2010-08 EN
15、ISO 3923-1:2010 (E) 2 Page Foreword3 1 Scope 4 2 Normative references 4 3 Principle4 4 Symbols and designation .4 5 Apparatus .5 6 Sample 7 7 Procedure .7 8 Expression of results 8 9 Precision.8 9.1 Repeatability.8 9.2 Reproducibility.8 10 Test report 8 Foreword The text of ISO 3923-1:2008 has been
16、prepared by Technical Committee ISO/TC 119 “Powder metallurgy” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 3923-1:2010. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsem
17、ent, at the latest by October 2010, and conflicting national standards shall be withdrawn at the latest by October 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identify
18、ing any or all such patent rights. This document supersedes EN 23923-1:1993. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic,
19、Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 3923-1:2008 has been a
20、pproved by CEN as a EN ISO 3923-1:2010 without any modification. DIN EN ISO 3923-1:2010-08 EN ISO 3923-1:2010 (E) 3 1 Scope This part of ISO 3923 specifies the funnel method for the determination of the apparent density of metallic powders under standardized conditions. The method is intended for me
21、tallic powders that flow freely through a 2,5 mm diameter orifice. It may, however, be used for powders that flow with difficulty through a 2,5 mm diameter orifice but flow through a 5 mm diameter orifice. Methods for the determination of the apparent density of powders that will not flow through a
22、5 mm diameter orifice are specified in ISO 3923-2. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including
23、any amendments) applies. ISO 3923-2, Metallic powders Determination of apparent density Part 2: Scott volumeter method 3 Principle Measurement of the mass of a certain quantity of powder, which in a loose condition exactly fills a cup of known volume. The loose condition is obtained by using, when f
24、illing the cup, a funnel placed at a determined distance above the cup. The ratio between the mass and the volume represents the apparent density. 4 Symbols and designation The symbols and designations used in this International Standard are defined in Table 1. Table 1 Symbol Designation Unit aAppar
25、ent density of metallic powders (General term) g/cm3acApparent density obtained by the funnel method g/cm3m Mass of the powder g V Volume of the cup cm3DIN EN ISO 3923-1:2010-08 EN ISO 3923-1:2010 (E) 4 5 Apparatus 5.1 Funnels, one having an orifice of diameter 2,5 mm and the other an orifice of dia
26、meter 5 mm; see Figures 1 and 2, respectively. 5.2 Cylindrical cup, having a capacity of 25 cm3 0,03 cm3and an internal diameter of 28 mm 0,5 mm. A cup with the same capacity and with an internal diameter of 30 mm 1 mm is also acceptable. 28 mm 0,5 mm is however the first option when new equipment i
27、s manufactured. The cup and funnels should be made of a non-magnetic, corrosion-resistant, metallic material having sufficient wall thickness and hardness to avoid distortion and excessive wear. The inner surfaces of the cup and funnels should be polished. 5.3 Balance, of sufficient capacity, capabl
28、e of weighing the test sample to an accuracy of 0,01 g. 5.4 Stand and horizontal vibration-free base, to support the cup and funnel, the stand holding the orifice of the funnel 25 mm above the top surface of the cup and coaxially with it; see Figure 3. Dimensions in millimetres Key aThis value is ma
29、ndatory. bD = 0,202,5+Figure 1 Funnel with orifice diameter 2,5 mm DIN EN ISO 3923-1:2010-08 EN ISO 3923-1:2010 (E) 5 Dimensions in millimetres Key aThis value is mandatory. bD = 0,205+Figure 2 Funnel with orifice diameter 5 mm DIN EN ISO 3923-1:2010-08 EN ISO 3923-1:2010 (E) 6 Dimensions in millime
30、tres Key aA cup with the same capacity and with an internal diameter of 30 mm 1 mm is also acceptable (see 5.2). Figure 3 Arrangement of the stand with funnel and cup 6 Sample 6.1 The test sample shall be of at least 100 cm3in volume to allow the determination to be carried out on three test portion
31、s. 6.2 In general, the powder should be tested in the as-received condition. In certain instances, the powder may be dried. However, if the powder is susceptible to oxidation, the drying shall take place in a vacuum or in an inert gas. If the powder contains volatile substances, it shall not be drie
32、d. 7 Procedure 7.1 Pour the test portion of powder into the funnel with the 2,5 mm orifice and, from that, directly into the cylindrical cup, until this is completely filled and the powder flows over. Level the powder in one operation with a non-magnetic straight-edge without compressing it, and tak
33、e care not to jar or vibrate the cup. 7.2 If the powder does not flow through this funnel, use the funnel with the 5 mm orifice. If the powder still does not flow, it is allowable to initiate flow by poking once with a 1 mm wire from the top of the funnel. The wire shall not enter the cup. 7.3 After
34、 levelling the powder, tap the cup to settle the powder, in order to avoid spilling it during transport. Make sure that there are no adhering particles on the exterior of the cup. 7.4 Determine the mass of the powder to the nearest 0,01 g. 7.5 Carry out the determinations on three test portions. DIN
35、 EN ISO 3923-1:2010-08 EN ISO 3923-1:2010 (E) 7 8 Expression of results The apparent density is given by the formula ac25mmV = Report the arithmetical mean of the three determinations to the nearest 0,01 g/cm3, and also the highest and lowest results if the scatter between results exceeds 1 % of the
36、 mean. 9 Precision 9.1 Repeatability Duplicated tests with the same equipment, by the same operator, on a homogenized batch of powder, should be considered suspect if they differ by more than 0,03 g/cm3at a 95 % confidence level. 9.2 Reproducibility Results from two different laboratories, on the sa
37、me homogenized batch of powder, should be considered suspect if they differ by more than 0,05 g/cm3at a 95 % confidence level. 10 Test report The test report shall include the following information: a) a reference to this part of ISO 3923; b) all details necessary for the identification of the test
38、sample; c) the drying procedure, if the powder has been dried; d) the nominal diameter of the orifice and the use of a wire, if applied; e) the result obtained; f) all operations not specified in this part of ISO 3923, or regarded as optional; g) details of any occurrence which may have affected the result. DIN EN ISO 3923-1:2010-08 EN ISO 3923-1:2010 (E) 8
