METHOD AND DEVICE FOR DETERMINATION OF HARDNESS Russian patent published in 1996 - IPC

FIELD: testing technology. SUBSTANCE: device has housing 2, guide pipe, impact spring, trigger mechanism, impact rod 5 with striker 4 and indenter 9 made in form of cone, system for registration of indenter penetration speed made in form of permanent magnet 11 secured on impact rod at point of its connection with indenter 9 and inductance coil connected with housing and located in zone of interaction of indenter with article under test. After placing in operation the loading mechanism of impact rod and beginning of penetration of indenter into material under test, registration of rate of penetration is effected. Rate of penetration of indenter, depth of penetration and speed of approach of indenter are determined by the signal induced by permanent magnet in inductance coil. Then hardness of material under test is calculated according to the definite program for personal computer. EFFECT: enhanced reliability. 3 cl, 2 dwg