【AS澳大利亚标准】AS 181722002 Metallic materialsVickers hardness test Method 2 Verification of testing machines.doc

iAustralian StandardTMAS 1817.2—2002ISO 6507-2:1997Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 23 Jul 2007AS 1817.2Metallic materials—Vickers hardness testMethod 2: Verification of testing machinesPREFACEThis Standard was prepared by Standards Australia Committee MT-006, Mechanical T esting ofMetals to supersede (in part) AS 1817—1991, Metallic materials—Vickers hardness test.This Standard is identical with and is reproduced from ISO 6507-2:1997, Metallic materials—Vickers hardness test, Part 2: Verification of testing machines.This Standard is Method 2 of a series of Standards covering the Vickers harness testing of metallic materials.The series comprises the following Methods: AS1817 Vickers hardness test1817.1Method 1:Test method (ISO 6507-1:1997, MOD)1817.2Method 2:Verification of testing machines1817.3Method 3:Calibration of reference blocksThe force values in this Method were calculated from kilogram force values. They were introduced before the SI-system was adopted. It was decided to keep the values based on the old units for this Method but in the next revision it will be necessary to consider the advantage of introducing rounded values of test force and their effect on the hardness scales.Attention is drawn to the fact that in this revision the following aspects should be considered:(a) Addition of a new table (Table 3) for the estimation capability and the maximum permissible error of the measuring device.(b) Changes of the values for the repeatability of the hardness testing machines in Table 4. (c) Addition of a new Clause 6 concerning the intervals between the verifications.(d) Addition of a new Annex A ‘Example of a method for an indirect verification of the measuring device’ (using a reference indentation).(e) Addition of a new Annex B ‘Notes on diamond indentors’.As this Standard is reproduced from an International Standard, the following applies:(i) Its number does not appear on each page of text and its identity is shown only on the cover and title page.(ii) In the source text ‘this part of ISO 6507’ should read ‘this Australian Standard’.(iii) A full point should be substituted for a comma when referring to a decimal marker.References to International Standards should be replaced by references to equivalent AustralianStandards, as follows:iiReference to International Standard Australian StandardISO AS376 Metallic materials—Calibration of —force-proving instruments used for theverification of uniaxial testing machines3878 Hardmetals—Vickers hardness test 1817 Metallic materials—Vickers hardness testing1817.1 Part 1: Test method(ISO 6507-1:1997, MOD)ISO6507 Metallic materials—Vickers hardness test1817 Metallic materials—Vickers hardness testAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 23 Jul 20076507-1 Part 1: Test method 1817.1 Method 1: Test method(ISO 6507-1:1997, MOD)6507-3 Part 3: Calibration of reference blocks 1817.3 Method 3: Calibration of reference blocksThe term ‘informative’ has been used in this Standard to define the application of the appendix to which it applies. An ‘informative’ appendix is only for information and guidance.Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 23 Jul 20071 ScopeThis part of ISO 6507 specifies a method of verification of testing machines for determiningVickers hardness in accordance with ISO 6507-1.It describes a direct verification method for checking the main functions of the machine, and an indirect verification method suitable for the overall checking of the machine. The indirect verification method may be used on its own for periodic routine checking of the machine in service.If a testing machine is also to be used for other methods of hardness testing, it is essential that it is verified independently for each method.Portable hardness testing machines shall comply with all the requirements of this part ofISO 6507, but the word "relocation" in 6.1a) does not apply.The force values in this part of ISO 6507 were calculated from kilogram force values. They were introduced before the SI-system was adopted. It was decided to keep the values based on the old units for this edition, but for the next revision it will be necessary to consider the advantage of introducing rounded values of test force and the consequence on the hardness scales.2 Normative referencesThe following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 6507. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 6507 are encouraged to investigate the possibility of applying the most recent editions of the standards in。