ISO-3927-2001.pdf
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1、INTERNATIONAL STANDARD ISO 3927 Third edition 2001-12-01 Reference number ISO 3927:2001(E) ISO 2001 Metallic powders, excluding powders for hardmetals Determination of compressibility in uniaxial compression Poudres mtalliques, lexclusion des poudres pour mtaux-durs Dtermination de la compressibilit
2、 sous compression uniaxiale Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/23/2007 08:51:52 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3927:2001(E) ii ISO 2001 All rig
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6、below. ISO 2001 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member bo
7、dy in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISO License
8、e=Aramco HQ/9980755100 Not for Resale, 04/23/2007 08:51:52 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3927:2001(E) ISO 2001 All rights reserved iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bod
9、ies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organization
10、s, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the I
11、SO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that som
12、e of the elements of this International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 3927 was prepared by Technical Committee ISO/TC 119, Powder metallurgy, Subcommittee SC 2, Sampling and te
13、sting methods for powders (including powders for hardmetals). This third edition cancels and replaces the second edition (ISO 3927:1985), which has been technically revised. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100
14、Not for Resale, 04/23/2007 08:51:52 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/23/2007 08:51:52 MDTNo reproduction or networ
15、king permitted without license from IHS -,-,- INTERNATIONAL STANDARDISO 3927:2001(E) ISO 2001 All rights reserved 1 Metallic powders, excluding powders for hardmetals Determination of compressibility in uniaxial compression 1Scope This International Standard specifies methods for measuring the exten
16、t to which a metallic powder is compacted when subjected to uniaxial compressive loading in a confining die under specified conditions. The method is not applicable to powders for hardmetals. 2Symbols For the purposes of this International Standard, the symbols given in Table 1 apply. 3Principle Uni
17、axal compaction of a powder 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, the density of the compacts is determined. The density obtained in the former case
18、represents the compressibility of the powder at the specified pressure. The densities obtained in the latter case can be utilized for drawing the compressibility curve of the powder, i.e. a plot of the density as a function of the compacting pressure. 4Apparatus 4.1Die, preferably of cemented carbid
19、e, or alternatively of tool steel, and two punches for producing either cylindrical or rectangular compacts. The cylindrical die should be capable of making compacts of diameter to and a height to diameter ratio between 0,8 and 1. An example of a design for tooling is shown in Figure 1. The rectangu
20、lar die should be capable of making compacts and of thickness to . An example for a design for tooling is shown in Figure 2. Mating parts shall be fitted and lapped. 4.2Press, capable of applying forces up to aproximately with a minimum accuracy of and adjustable to permit an even increase of the fo
21、rce at a rate not higher than . 4.3Balance, capable of weighing at least to an accuracy of . Table 1 Symbols SymbolMeaningUnit Compressibilitya Mass of the compact Volume of the compact a If the compressibility is measured at one pressure only, e.g. , the symbol becomes . pg/cm3 mg Vcm3 400 N/mm2p(4
22、00) 20 mm26 mm 30 mm12 mm5 mm7 mm 500 kN1 % 50 kN/s 100 g0,01 g Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/23/2007 08:51:52 MDTNo reproduction or networking permitted without license from IHS -,-,-
23、ISO 3927:2001(E) 2 ISO 2001 All rights reserved 4.4Micrometer or other suitable measuring device for measuring the dimensions of the compacts to an accuracy of . 5Sampling The quantity of the test sample shall be chosen to give the required number of test pieces (see clause 7) with the dimensions sp
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