EN 23927:1993

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Metallic powders, excluding powders for hardmetals - Determination of compactibility (Compressibility) in uniaxial compression (ISO 3927:1985)Metallpulver, mit Ausnahme von Hartmetallpulvern - Bestimmung der Verdichtbarkeit bei einachsigem Pressen (ISO 3927:1985)Poudres métalliques, a l'exclusion des poudres pour métaux-durs - Détermination de la compressibilité sous compression uniaxiale (ISO 3927:1985)Metallic powders, excluding powders for hardmetals - Determination of compactibility (Compressibility) in uniaxial compression (ISO 3927:1985)77.160Metalurgija prahovPowder metallurgyICS:Ta slovenski standard je istoveten z:EN 23927:1993SIST EN 23927:2000en01-december-2000SIST EN 23927:2000SLOVENSKI
STANDARD
International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.ME~YHAPOfiHAR OPrAHM3AUMR fl0 CTAH~APTM3ALWlM*ORGANISATlON INTERNATIONALE DE NORMALISATION Metallic powders, excluding powders for hardmetals - Determination of compactibility (compressibility) in uniaxial compression Poudres m&alliques, 3 l’exclusion des poudres pour mhtaux-durs - 06 termina tion de Ia compressibilitk sous compression uniaxiale Second edition - 1985-07-01 UDC 621.762.4 : 539.58 Ref. No. ISO 3927-1985 (E) Descriptors : powder metallurgy, metallic powder, tests, compression tests, determination, compressibility, test equipment. Price based on 4 pages SIST EN 23927:2000

Foreword ISO (the International Organization for Standardization) is a worldwide federation of national Standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Esch member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 3927 was prepared by Technical Committee ISO/TC 119, Powder metallurgy. ISO 3927 was first published in 1977. This second edition cancels and replaces the first edition, of which it constitutes a minor revision. 0 International Organkation for Standardkation, 1985 Printed in Switzerland SIST EN 23927:2000

INTERNATIONAL STANDARD ISO 3927-1985 (E) Metallic powders, excluding powders for hardmetals - Determination of compactibility (compressibility) in uniaxial compression 1 Scope and field of application This International Standard specifies methods to measure the extent to which a metallic powder is compacted when sub- jected to uniaxial compressive loading in a confining die under specified conditions. The method is not applicable to powders for hardmetals. 2 Principle Campaction of a powder uniaxially in a confining die by double- action pressing. Samples of the powder may be pressed either at a Single specified pressure or at a series of specified pressures. After ejection from the die, determination of the density of the compacts. The density obtained in the former case represents the compac- tibility of the powder at the specified pressure. The densities obtained in the latter case tan be utilized for drawing the com- pactibility (compressibility) curve of the powder, i.e. a plot of the density as a function of the compacting pressure. 3 Symbols and designations (Symbol/ ~ Designation 1 Unit I Compactibility Mass of the compact Volume of the compact If the compactibility is measured at one pressure only, for example 400 N/mm 2, the Symbol becomes Q~(~). 4 Apparatus 4.1 Die, preferably of cemented carbide, or alternatively of tool steel, and two punches for producing either cylindrical or rectangular compacts. 4.1.1 The cylindrical die should be capable of making com- pacts of diameter 20 to 26 mm and a height to diameter ratio between 0,8 and 1. An example of a design for tooling is shown in figure 1. 4.1.2 The rectangular die should be capable of making compacts 30 mm x 12 mm and of thickness 5 to 7 mm. An example for a design for tooling is shown in figure 2. 4.2 Press, capable of applying forces up to about 500 kN with a minimum accuracy of *2 % and adjustable to permit an even increase of the forte at a rate not higher than 50 kN/s. 4.3 Balance, capable of weighing at least 100 g to an ac- curacy of *O,Ol g. 4.4 Micrometer or other suitable measuring device for m
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