Abrégé

[Problem] To provide a hardness testing device and a hardness testing method with which it is possible to measure hardness with good precision even if a surface layer is not removed. [Solution] An initial test power which is arbitrarily changed from a reference value is applied by an indenter (11) to a sample material surface. Next, a main test power is applied in which an additional test power is added to the initial test power. The initial test power is restored. A test hardness of the sample material is derived, on the basis of a Rockwell hardness computation formula, from the difference between the indenter forward depth in the two initial test powers. A variance in the hardness arising from changing the initial test power from the reference value is corrected in the derived test hardness.

Classes IPC  ?

• G01N 3/44 - Recherche de la dureté ou de la dureté au rebondissement en effectuant des empreintes sous une charge permanente par des dispositifs de pénétration, p. ex. sphère, pyramide les dispositifs de pénétration étant placés sous une faible charge initiale, puis sous une charge importante, c.-à-d. le procédé Rockwell