Abstract
This paper introduces the development of the special traceability measuring tool for microforce value with the test force range of 0.009807 N ~ 9.807 N (1 gf ~ 1 kgf) and the accuracy of better than ± 0.1 %, including the selection of the electromagnetic balance module, the design of the hardware structure, and the compilation of the software program. Finally, the special traceability measuring tool integrating the test measurement, automatic data collection and automatic data processing is realized, and the test verification result is given. It provides a method to solve the problem of trace the small force value of existing micro Vickers hardness tester and Knoop hardness tester.
Highlights
With the development of modern material surface engineering, such as Physical vapor deposition, magnetron sputtering, ion implantation, surface modification, thermal spraying, nitriding and carburizing, etc., the thickness of micro Vickers hardness and Knoop hardness test samples or the surface modified layer on the sample surface is getting thinner and thinner, and the hardness test force value is getting lower and lower, reaching 0.009807 N
It can be seen from table 3 that the accuracy and repeatability of the development of the special traceability measuring tool for micro force value are 0.005% and 0.003%, meeting the design and use requirements
This paper introduces the development of a special measuring tool for micro force traceability, which has a measuring force range of 0.009807 N ~ 9.807 N (1 gf ~ 1 kgf), and the accuracy is better than ± 0.1%
Summary
With the development of modern material surface engineering, such as Physical vapor deposition, magnetron sputtering, ion implantation, surface modification, thermal spraying, nitriding and carburizing, etc., the thickness of micro Vickers hardness and Knoop hardness test samples or the surface modified layer on the sample surface is getting thinner and thinner, and the hardness test force value is getting lower and lower, reaching 0.009807 N. The minimum measuring range of the existing force measuring instrument is 1 N. According to the principle of one tenth use, the minimum measurement can be 0.1 N, which can not meet the existing requirements. It is very necessary and urgent to develop the special traceability measuring tool with the lower limit of 0.009807 N
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