A STUDY OF THE HRC HARDNESS STANDARD - EVALUATION METHOD USING VICKERS DIAMOND INDENTERS |
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| H. Yamamoto, T. Yamamoto |
- Abstract:
- Due to the practical convenience of fast testing conditions and the reliability of comparative accuracy, HRC hardness tests are more often used in the industrial world than such theoretical hardness scales as HV and HB. On the other hand, the HRC scale still has an uncertainty of ± 0.4 HRC, which may result from the technical difficulty of machining crystal diamond into a precisely spherical tip of a diamond indenter and the non-elastic error from a complex indenter structure under test load. Historically, loading conditions for HRC hardness tests have not been very consistent.- Faster conditions were conveniently used in the early years, but the advent of hardness blocks encouraged a preference for stricter conditions. In recent years, however, the wider industrial application of HRC testing is again making people choose faster conditions - an international trend now followed by the ISO standards. It is natural for hardness measurements to vary when testing conditions - the tester, indenter and loading requirements - are not fixed. This problem is especially true with the HRC standard - a subject discussed in this paper.
- Keywords:
- Rockwell hardness, Vickers hardness, indentation
- Download:
- IMEKO-WC-2000-TC5-P176.pdf
- DOI:
- -
- Event details
- Event name:
- XVI IMEKO World Congress
- Title:
Measurement - Supports Science - Improves Technology - Protects Environment ... and Provides Employment - Now and in the Future
- Place:
- Vienna, AUSTRIA
- Time:
- 25 September 2000 - 28 September 2000