2017. Vol.20. 1, pp. 16-19
Elaboration of Leeb hardness calibration machine
In connection with the development of harmonized standard and the need for the implementation of the metrological traceability of Leeb hardness method, as well as the identifying and disseminating of hardness scales, methodological and technological solutions for the Leeb hardness secondary calibration machine are considered. Based on the analysis of required metrological characteristics of secondary calibration machine and hardness reference blocks, the construction of velocity measuring system with two inductors and system parameters calculation with required metrological characteristics are suggested. Test results of Leeb hardness secondary calibration machine layout for HLD scale confirmed its compliance with international standards and the draft of harmonized standard. The obtained results can be used to develop the Leeb hardness secondary calibration machine to equip the standardization and metrology centers of the Russian Federation and abroad.
Keywords: hardness, dynamic hardness, Leeb, hardness calibration machine.