BS ISO 11873-2005 Hardmetals - Determination of sulfur and carbon contents in cobalt metal powders - Infrared detection method《硬质合金 钴金属粉末中硫和碳含量的测定 红外线探测法》.pdf

1、BRITISH STANDARD BS ISO 11873:2005 Hardmetals Determination of sulfur and carbon contents in cobalt metal powders Infrared detection method ICS 77.160 BS ISO 11873:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 14 April 2005 BSI 14 Apri

2、l 2005 ISBN 0 580 45829 6 National foreword This British Standard reproduces verbatim ISO 11873:2005 and implements it as the UK national standard. The UK participation in its preparation was entrusted by Technical Committee ISE/65, Sintered metal components, to Subcommittee ISE/65/4, Sampling and t

3、esting method, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under

4、 the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct appli

5、cation. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; mo

6、nitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii and iii, a blank page, page 1 and 2, an inside back cover and a back cover. The BSI copyright notice displa

7、yed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 11873:2005(E) ISO 2005INTERNATIONAL STANDARD ISO 11873 First edition 2005-02-15 Hardmetals Determination of sulfur and carbon contents in cobalt metal pow

8、ders Infrared detection method Mtaux-durs Dosage du soufre et du carbone dans les carbures au cobalt Mthode par dtection infrarouge BSISO11873:2005IS:37811 O5002(E) DPlcsid Fremia ihTs PDF file may ctnoian emdebt dedyfepcaes. In ccaocnadrw eith Aebods licensilop gnic,y this file mairp eb ynted iv ro

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14、n from eitI rehSa Ot tsserdda eh ebolw or ISOs memreb i ydobn the cnuotrfo y ttseuqer ehe.r ISO cirypothg fofice saCe tsopale 65 eneG 1121-HC 02 av leT. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mail coirypthgiso.o gr We bwww.is.o gro Pulbisdehi n Switlrez dnaii ISO 5002 Allr ithgsr esedevrBSISO118

15、73:2005IS:37811 O5002(E) I SO 5002 All irthgs ersedevr iiiForeword 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 committe

16、es. 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 organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the Inte

17、rnational Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International S

18、tandards 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 some of the elements of this document may be the su

19、bject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 11873 was prepared by Technical Committee ISO/TC 119, Powder metallurgy, Subcommittee SC 4, Sampling and testing methods for hardmetals. BSISO11873:2005blank 5002:37811OSISBINTENRATIONAL TSAN

20、DADR IS:37811 O5002(E)I SO 5002 All irthgs ersedevr 1Hardmetals Determination of sulfur and carbon contents in cobalt metal powders Infrared detection method 1 Scope This International Standard specifies the method to be used for the determination of sulfur and carbon in cobalt metal powders in the

21、range of 0,001 % (m/m) to 0,1 % (m/m) by combustion in oxygen and infrared (IR)- detection of carbon dioxide (CO 2 ) and sulfur dioxide (SO 2 ). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition ci

22、ted applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 5725 (all parts), Accuracy (trueness and precision) of measurement methods and results 3 Reagents Reagents of the highest purity shall be used. 3.1 Oxygen, purity according to t

23、he specification of the supplier. 3.2 Tungsten granules, or an equivalent shape or form of tungsten as a combustion aid. The particle size shall not be less than 0,2 mm. 3.3 Iron chips, as required for combustion. 4 Procedure 4.1 Test portion Weigh, to the nearest 0,001 g, 0,5 g to 1,5 g of the samp

24、le into a suitable crucible. The mass is dependent on the carbon and sulfur content. There may be a risk of contamination if samples/materials are stored in plastic containers. 4.2 Analysis Add the combustion aid (3.2 and 3.3) and carry out the analysis according to the instructions of the manufactu

25、rer. BSISO11873:2005IS:37811 O5002(E) 2 I SO 5002 All irthgs ersedevr4.3 Calibration Perform at least three blank tests with a crucible and combustion aid (3.2 and 3.3). Proceed if the blank values are within the specification of the instrument manufacturer. Perform at least three calibration tests

26、with reference materials. 5 Expression of the results 5.1 Calculation Calculate the mass fraction of sulfur , w S , or carbon, w C , expressed as a percentage, using the following formulae: S S ()1 0 0 mBP w M = C C ( ) 100 mBP w M = where m Sis the mass, in grams, of sulfur determined in the test p

27、ortion; m Cis the mass, in grams, of carbon determined in the test portion; P is the calibration factor; m is the mass, in grams, of the test portion; B is the average blank value (see 4.3). 5.2 Permissible tolerances The repeatability standard deviations between three independent determinations sha

28、ll not exceed the following values: Lower limit Upper limit C 0,005 0 % (m/m) 50 % 0,200 0 % (m/m) 10 % S 0,005 0 % (m/m) 50 % 0,200 0 % (m/m) 10 % 5.3 Final result Report the arithmetical mean of acceptable determinations of mass fractions rounded to 0,001 %. 6 Test report The test report shall inc

29、lude the following information: a) a reference to this International Standard; b) all details necessary for identification of the test sample; c) the test results obtained; d) all operations not specified by this International Standard, or regarded as optional; e) details of any occurrence which may

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