ISO 6507-3:2018 specifies a method for the calibration of reference blocks to be used for the indirect verification of Vickers hardness testing machines, as specified in ISO 6507-2. The method is applicable only for indentations with diagonals =0,020 mm.
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
Sisällysluettelo
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Manufacture of reference blocks
4.1 General
4.2 Thickness
4.3 Test surface area
4.4 Magnetism
4.5 Flatness and parallelism
4.6 Surface roughness
4.7 Prevention of the regrind of the test surface
5 Calibration machine
5.1 General
5.2 Direct verification
5.3 Traceability of verification instruments
5.4 Test force
5.5 Indenter
5.6 Diagonal measuring system
6 Calibration procedure
7 Number of indentations
8 Uniformity of hardness
8.1 Relative non-uniformity
8.2 Uncertainty of measurement
9 Marking
10 Calibration certificate
11 Validity
Annex A Uncertainty of the mean hardness value of hardness reference blocks (informative)
Annex B Adjustment of Köhler illumination systems (informative)
ISO 376:2011 Metallic materials -- Calibration of force-proving instruments used for the verification of uniaxial testing machines
ISO 6507-1:2018 Metallic materials -- Vickers hardness test -- Part 1: Test method
ISO 6507-2:2018 Metallic materials -- Vickers hardness test -- Part 2: Verification and calibration of testing machines
ISO 376:2011 Metallic materials -- Calibration of force-proving instruments used for the verification of uniaxial testing machines
ISO 6507-1:2018 Metallic materials -- Vickers hardness test -- Part 1: Test method
ISO 6507-2:2018 Metallic materials -- Vickers hardness test -- Part 2: Verification and calibration of testing machines