EN 24492:1993
(Main)Metallic powders, excluding powders for hardmetals - Determination of dimensional changes associated with compacting and sintering (ISO 4492:1985)
Metallic powders, excluding powders for hardmetals - Determination of dimensional changes associated with compacting and sintering (ISO 4492:1985)
This second edition cancels and replaces the first edition (i. e. ISO 4492:1978). The method is applicable to the determination of three types of dimensional changes involved with the processing of metallic powders. Gives principle, test parameters, symbols and designations, apparatus, sampling, procedure, expression of results and test report. An annex contains information on demensional change behaviour.
Metallpulver, mit Ausnahme von Hartmetallpulver - Ermittlung der Maßänderungen beim Pressen und Sintern (ISO 4492:1985)
Diese Internationale Norm behandelt ein Verfahren, bei dem die Massänderungen beim Pressen und Sintern von Metallpulvern mit denjenigen eines Referenzpulvers verglichen werden, wenn dieses unter ähnlichen Bedingungen behandelt wird (siehe Abschnitt 4). Das Verfahren ist anwendbar zur Ermittlung von 3 Arten von Massänderungen bei der Verarbeitung von Metallpulvern, mit Ausnahme von Hartmetallpulvern.
Poudres métalliques à l'exclusion des poudres pour métaux-durs - Détermination de changements dimensionnels liés à la compression et au frittage (ISO 4492:1985)
La présente Norme internationale spécifie une méthode par laquelle les changements dimensionnels liés à la compression et au frittage des poudres métalliques sont comparés à ceux d'une poudre de référence mise en oeuvre dans des conditions similaires. (Voir chapitre 4.) La méthode s'applique à la détermination de trois types de changements dimensionnels survenant au cours du traitement des poudres métalliques, à l'exclusion des poudres pour métaux-durs.
La présente Norme internationale spécifie une méthode par laquelle les changements dimensionnels liés à la compression et au frittage des poudres métalliques sont comparés à ceux d'une poudre de référence mise en oeuvre dans des conditions similaires. (Voir chapitre 4.)La méthode s'applique à la détermination de trois types de changements dimensionnels survenant au cours du traitement des poudres métalliques, à l'exclusion des poudres pour métaux-durs.
Metallic powders, excluding powders for hardmetals - Determination of dimensional changes associated with compacting and sintering (ISO 4492:1985)
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Metallic powders, excluding powders for hardmetals - Determination of dimensional changes associated with compacting and sintering (ISO 4492:1985)Metallpulver, mit Ausnahme von Hartmetallpulver - Ermittlung der Maßänderungen beim Pressen und Sintern (ISO 4492:1985)Poudres métalliques a l'exclusion des poudres pour métaux-durs - Détermination de changements dimensionnels liés a la compression et au frittage (ISO 4492:1985)Metallic powders, excluding powders for hardmetals - Determination of dimensional changes associated with compacting and sintering (ISO 4492:1985)77.160Metalurgija prahovPowder metallurgyICS:Ta slovenski standard je istoveten z:EN 24492:1993SIST EN 24492:2000en01-december-2000SIST EN 24492:2000SLOVENSKI
STANDARD
SIST EN 24492:2000
SIST EN 24492:2000
SIST EN 24492:2000
SIST EN 24492:2000
SIST EN 24492:2000
SIST EN 24492:2000
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 4492 was prepared by Technical Committee ISO/TC 119, Powder metallurgy. ISO 4492 was first published in 1978. This second edition cancels and replaces the first edition, of which it constitutes a minor revision. 0 International Organkation for Standardkation, 1985 0 Printed in Switzerland SIST EN 24492:2000
INTERNATIONAL STANDARD ISO 44924985 (E) Metallic powders, excluding powders for hardmetals - Determination ,of dimensional changes associated with compacting and sintering 1 Scope and field of application This International Standard specifies a method by which the dimensional changes associated with compacting and sintering of metallic powders are compared with those of a reference powder when processed under similar conditions. (See clause 4.1 The method applies to the determination of three types of dimensional changes involved with the processing of metallic powders, excluding powders for hardmetals. 2 References ISO 2740, Sin tered metal ma terials (excluding hardmetal) - Tensile test pieces. ISO 3927, Metallic powders, excluding powders for hardmetals - Determination o f compac tibility (compressibility) in uniaxial compression. 3 Principle Campaction of a metallic powder or powder mix with admixed lubricant to produce a test piece and then sintering it under controlled conditions. Depending upon the particular dimen- sional Change required, measurement of the dimension of the unloaded die cavity, the green compact and/or the sintered test piece. Calculation of the algebraic differente between these various measurements as a percentage of the dimension of the die cavity or the green compact. (See clause 9.) Standard test pieces made from a reference lot of powder are processed together with the Sample under test and the dimen- sional changes of the two powders are reported. 4 Test Parameters The reference powder shall be Chosen by agreement between supplier and user and shall have a composition and properties as close as possible to those of the powder to be tested. The following three types of dimensional changes are dealt with in this International Standard: 4.1 From die size to green size (spring back) : The in- crease in dimensions of a compact, measured at right angles to the direction of pressing, after being ejected from the die. 4.2 From green size to sintered size (sintered dimen- sional Change) : The Change in dimensions of an Object that occurs as a result of sintering. 4.3 From die size to sintered size (total dimensional Change). 5 Symbols and designations Symbol dD dG 4 AdDG AdGS AdDS Designation Test dimension of unloaded die Test dimension of green compact Test dimension of sintered compact Spring back Sintered dimensional Change Total dimensional Change Unit mm mm mm % (+) % (+ or -) % (+ or -) 6 Apparatus 6.1 Tool set that will produce cylindrical (sec figure 11, rec- tangular (see figure 2) or tensile test pieces (in accordance with ISO 2740) or test pieces similar to the actual components for which the powder is required. 6.2 Press capable of applying the pressures necessary to achieve the required density. 6.3 Balance capable of weighing at least 100 g to an ac- curacy of +O,Ol g. 6.4 Micrometer
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.