JIS-Z-2244-2003-ENG.pdf
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1、J IS JAPANESE I N DUSTR IAL STANDARD Translated and Published by Ja pan ese Stand a rds Association JIS Z 22442003 (JISF/ JSA) Vickers hardness test-Test method ICs 77.040; 10 Reference number : JIS Z 2244 : 2003 (E) PROTECTED BY COPYRIGHT 59 s Z 2244 : 2003 Foreword This translation has been made b
2、ased on the original Japanese Industrial Standard revised by the Minister of Economy, Trade and Industry through deliberations at the Japanese Industrial Standards Committee, as the result of proposal for revision of Japanese Industrial Standard submitted by The Japan Iron and Steel Federation (JISF
3、)/the Japanese Standards Association (JSA) with the draft being attached, based on the provision of Article 12 Clause 1 of the Industrial Standardization Law applicable to the case of revision by the provision of Article 14. Consequently, JIS 2 2244 : 1998 is replaced with this Standard. Date of Est
4、ablishment: 1952-06-21 Date of Revision: 2003-03-20 Date of Public Notice in Official Gazette: 2003-03-20 Investigated by: Japanese Industrial Standards Committee Standards Board Technical Committee on Iron and Steel TIS Z 2244 : 2003, First English edition published in 2003-07 Translated and publis
5、hed by: Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN In the event of any doubts arising as to the contents, the original JIS is to be the final authority. O JSA 2003 Ali rights reserved. Unless otherwise specified, no part of this publication may be reproduced or
6、utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Printed in Japan PROTECTED BY COPYRIGHT Contents Z 2244 : 2003 Page Introduction . 1 2 3 4 4.1 4.2 5 6 7 8 9 Scope Normative reference Principle Sym
7、bols and denotation of hardness . Symbols . Denotation of hardness . Testing machine . Test piece Test Uncertainty of the results . Test report Annex A (normative) Annex B (normative) Annex C (normative) Minimum thickness of the test piece in relation to the test force and to the hardness Tables of
8、correction factors for use in tests made on curved surfaces . Tables of Vickers hardness values Annex D (informative) Monitoring the uncertainty of the hardness testing machines by the users . 103 Annex 1 (informative) Comparison table between JIS and corresponding International Standard . 104 (i) P
9、ROTECTED BY COPYRIGHT -,-,- JAPANESE INDUSTRIAL STANDARD JIS Z 2244 : 2003 Vickers hardness test-Test method Introduction This Japanese Industrial Standard has been prepared based on IS0 6507-1 Metallic materials-Vickers hardness test-Part 1 : Test method published in 1997, without modification in t
10、he technical contents, but with some additions of normative items that are not specified in the corresponding International Standard. In this Standard, portions underlined with dots are matters that are not included in the original International Standard. List of modifications with their explanation
11、s is shown in the Annex 1 (informative). 1 Scope This Standard specifies the Vickers hardness test method mainly for the metallic materials the test force of which is 98.07 mN or more. The Vickers hardness test is specified in this Standard for lengths of indentation diagonals between 20 pm and 1.40
12、0 pm. Remarks 1 For specific materials and products, particular standards exist. 2 The Vickers hardness test for the lengths of indentation diagonals less than 20 pm and the test force of less than 98.07 mN shall con- form to this Standard. . 3 The International Standard corresponding to this Standa
13、rd is as follows. In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) ac- cording to ISODEC Guide 21. IS0 6507-1 : 1997 Metallic materials-Vickers hardness tes
14、t-Part 1 : Test method (MOD) 2 Normative reference The following standard contains provisions which, through reference in this Standard, constitute provisions of this Standard. The most recent edition of the standard indicated below (including amendments) shall be applied. JIS B 7725 Vickers hardnes
15、s test-Verification of testing machines Remarks : IS0 6507-2 : 1997 Metallic materials-Vickers hardness test-Part 2 : Verification of testing machines is equivalent to the said standard. 3 Principle A diamond indenter in the form of a right pyramid with a square base and with a specified angle betwe
16、en opposite faces at the vertex is forced into the surface of a test piece followed by measurement of the diagonal length of the indentation left in the surface after removal of the test force, F (see Figure i). The Vickers hardness is proportional to the quotient obtained by dividing the test force
17、 by the sloping area of the indentation which is assumed to be a right pyramid with a square base, and having at the vertex the same angle as the indenter. PROTECTED BY COPYRIGHT -,-,- 2 Z 2244 : 2003 a) Vickers indenter Figure 1 b) Vickers indentation Principle of the test 4 Symbols and denotation
18、of hardness 4.1 Symbols Symbols and their definitions are given in Table 1 (see Table 1 Symbols and their definitions Symbol F Definition Angle between the opposite faces at the vertex of the pyramidal indenter (136) Test force, in newtons Arithmetic mean, in millimeters, of the two diagonals length
19、 dl and dz (see Figure i) Test force Surface area of indentation Vickers hardness = Constant x 136“ 2Fsin- 2 F %0.189 1 - d2 d2 = 0.102 x %0.102 1 NOTE: Constant = - = g, 9.80665 Figure i). 4.2 preceded by the hardness value followed by a) b) Denotation of hardness The Vickers hardness is denoted by
20、 the symbol HV a number representing the test force (see Table 2); the duration of loading, in seconds, if different from the time specified in 7 d). EXAMPLES 1 2 640 HV30 = Vickers hardness of 640 determined with a test force of 294.2 N applied for 10 s to 15 s. 640 HV30/20 = Vickers hardness of 64
21、0 determined with a test force of 294.2 N applied for 20 s. 5 Testing machine The testing machine shall be as follows: a) Testing machine, capable of applying a predetermined force within the required range of test forces, in accordance with JIS B 7725. PROTECTED BY COPYRIGHT -,-,- 3 Z 2244 : 2003 b
22、) c) Indenter, as specified in JIS B 7725. Measuring device, as specified in JIS B 7725. NOTE : A recommended procedure for monitoring the uncertainty of the hard- ness testing machine by the users is given in Annex D. 6 Test piece The test piece shall be as follows: a) The test shall be carried out
23、 on a surface which is smooth and even, free from oxide scale, foreign matter and, in particular, completely free from lubricants, unless otherwise specified in product standards. The finish of the surface shall permit accurate determination of the diagonal length of the indentation. Preparation sha
24、ll be carried out in such a way that any alteration of the sur- face hardness, due to heat or cold-working, for example, is minimized. Due to the small depth of Vickers microhardness indentations, it is essential that special precautions are taken during preparation. It is recommended to use a polis
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